chore(release): prepare for 1.142.12

Documentation comment says forward and backward verification is set,
but the code was not doing it.
`vc-contact-confirm` and `vg-member-added` messages
indicate that other device finished securejoin protocol
so we know Bob has our key marked as verified.

.github/dependabot.yml

@@ -7,3 +7,10 @@ updates:
     commit-message:
       prefix: "chore(cargo)"
     open-pull-requests-limit: 50
+
+  # Keep GitHub Actions up to date.
+  # <https://docs.github.com/en/code-security/dependabot/working-with-dependabot/keeping-your-actions-up-to-date-with-dependabot>
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"

.github/workflows/ci.yml

@@ -24,7 +24,7 @@ jobs:
     name: Lint Rust
     runs-on: ubuntu-latest
     env:
-      RUSTUP_TOOLCHAIN: 1.79.0
+      RUSTUP_TOOLCHAIN: 1.80.1
     steps:
       - uses: actions/checkout@v4
         with:
@@ -59,7 +59,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           show-progress: false
-      - uses: EmbarkStudios/cargo-deny-action@v1
+      - uses: EmbarkStudios/cargo-deny-action@v2
         with:
           arguments: --all-features --workspace
           command: check
@@ -95,11 +95,11 @@ jobs:
       matrix:
         include:
           - os: ubuntu-latest
-            rust: 1.79.0
+            rust: 1.80.1
           - os: windows-latest
-            rust: 1.79.0
+            rust: 1.80.1
           - os: macos-latest
-            rust: 1.79.0
+            rust: 1.80.1
 
           # Minimum Supported Rust Version = 1.77.0
           - os: ubuntu-latest

.github/workflows/dependabot.yml

@@ -14,7 +14,7 @@ jobs:
     steps:
       - name: Dependabot metadata
         id: metadata
-        uses: dependabot/fetch-metadata@v1.1.1
+        uses: dependabot/fetch-metadata@v2.2.0
         with:
           github-token: "${{ secrets.GITHUB_TOKEN }}"
       - name: Approve a PR

.github/workflows/node-docs.yml

@@ -31,7 +31,7 @@ jobs:
           mv docs js
 
       - name: Upload
-        uses: horochx/deploy-via-scp@v1.0.1
+        uses: horochx/deploy-via-scp@1.1.0
         with:
           user: ${{ secrets.USERNAME }}
           key: ${{ secrets.KEY }}

.github/workflows/upload-docs.yml

@@ -74,7 +74,7 @@ jobs:
           show-progress: false
           fetch-depth: 0 # Fetch history to calculate VCS version number.
       - name: Use Node.js
-        uses: actions/setup-node@v2
+        uses: actions/setup-node@v4
         with:
           node-version: '18'
       - name: npm install

CHANGELOG.md

@@ -1,5 +1,260 @@
 # Changelog
 
+## [1.142.12] - 2024-09-02
+
+### Fixes
+
+- Display Config::MdnsEnabled as true by default ([#5948](https://github.com/deltachat/deltachat-core-rust/pull/5948)).
+
+## [1.142.11] - 2024-08-30
+
+### Fixes
+
+- Set backward verification when observing vc-contact-confirm or `vg-member-added` ([#5930](https://github.com/deltachat/deltachat-core-rust/pull/5930)).
+
+## [1.142.10] - 2024-08-26
+
+### Fixes
+
+- Only include one From: header in securejoin messages ([#5917](https://github.com/deltachat/deltachat-core-rust/pull/5917)).
+
+## [1.142.9] - 2024-08-24
+
+### Fixes
+
+- Fix reading of multiline SMTP greetings ([#5911](https://github.com/deltachat/deltachat-core-rust/pull/5911)).
+
+### Features / Changes
+
+- Update preloaded DNS cache.
+
+## [1.142.8] - 2024-08-21
+
+### Fixes
+
+- Do not panic on unknown CertificateChecks values.
+
+## [1.142.7] - 2024-08-17
+
+### Fixes
+
+- Do not save "Automatic" into configured_imap_certificate_checks. **This fixes regression introduced in core 1.142.4. Versions 1.142.4..1.142.6 should not be used in releases.**
+- Create a group unblocked for bot even if 1:1 chat is blocked ([#5514](https://github.com/deltachat/deltachat-core-rust/pull/5514)).
+- Update rpgp from 0.13.1 to 0.13.2 to fix "unable to decrypt" errors when sending messages to old Delta Chat clients and using Ed25519 keys to encrypt.
+- Do not request ALPN on standard ports and when using STARTTLS.
+
+### Features / Changes
+
+- jsonrpc: Add ContactObject::e2ee_avail.
+
+### Tests
+
+- Protected group for bot is auto-accepted.
+
+## [1.142.6] - 2024-08-15
+
+### Fixes
+
+- Default to strict TLS checks if not configured.
+
+### Miscellaneous Tasks
+
+- deltachat-rpc-client: Fix ruff 0.6.0 warnings.
+
+## [1.142.5] - 2024-08-14
+
+### Fixes
+
+- Still try to create "INBOX.DeltaChat" if couldn't create "DeltaChat" ([#5870](https://github.com/deltachat/deltachat-core-rust/pull/5870)).
+- `store_seen_flags_on_imap`: Skip to next messages if couldn't select folder ([#5870](https://github.com/deltachat/deltachat-core-rust/pull/5870)).
+- Increase timeout for QR generation to 60s ([#5882](https://github.com/deltachat/deltachat-core-rust/pull/5882)).
+
+### Documentation
+
+- Document new `mdns_enabled` behavior (bots do not send MDNs by default).
+
+### CI
+
+- Configure Dependabot to update GitHub Actions.
+
+### Miscellaneous Tasks
+
+- cargo: Bump regex from 1.10.5 to 1.10.6.
+- cargo: Bump serde from 1.0.204 to 1.0.205.
+- deps: Bump horochx/deploy-via-scp from 1.0.1 to 1.1.0.
+- deps: Bump dependabot/fetch-metadata from 1.1.1 to 2.2.0.
+- deps: Bump actions/setup-node from 2 to 4.
+- Update provider database.
+
+## [1.142.4] - 2024-08-09
+
+### Build system
+
+- Downgrade Tokio to 1.38 to fix Android compilation.
+- Use `--locked` with `cargo install`.
+
+### Features / Changes
+
+- Add Config::FixIsChatmail.
+- Always move outgoing auto-generated messages to the mvbox.
+- Disable requesting MDNs for bots by default.
+- Allow using OAuth 2 with SOCKS5.
+- Allow autoconfig when SOCKS5 is enabled.
+- Update provider database.
+- cargo: Update iroh from 0.21 to 0.22 ([#5860](https://github.com/deltachat/deltachat-core-rust/pull/5860)).
+
+### CI
+
+- Update Rust to 1.80.1.
+- Update EmbarkStudios/cargo-deny-action.
+
+### Documentation
+
+- Point to active Header Protection draft
+
+### Refactor
+
+- Derive `Default` for `CertificateChecks`.
+- Merge imap_certificate_checks and smtp_certificate_checks.
+- Remove param_addr_urlencoded argument from get_autoconfig().
+- Pass address to moz_autoconfigure() instead of LoginParam.
+
+## [1.142.3] - 2024-08-04
+
+### Build system
+
+- cargo: Update rusqlite and libsqlite3-sys.
+- Fix cargo warnings about default-features
+- Do not disable "vendored" feature in the workspace.
+- cargo: Bump quick-xml from 0.35.0 to 0.36.1.
+- cargo: Bump uuid from 1.9.1 to 1.10.0.
+- cargo: Bump tokio from 1.38.0 to 1.39.2.
+- cargo: Bump env_logger from 0.11.3 to 0.11.5.
+- Remove sha2 dependency.
+- Remove `backtrace` dependency.
+- Remove direct "quinn" dependency.
+
+## [1.142.2] - 2024-08-02
+
+### Features / Changes
+
+- Try only the full email address if username is unspecified.
+- Sort DNS results by successful connection timestamp ([#5818](https://github.com/deltachat/deltachat-core-rust/pull/5818)).
+
+### Fixes
+
+- Await the tasks after aborting them.
+- Do not reset is_chatmail config on failed reconfiguration.
+- Fix compilation on iOS.
+- Reset configured_provider on reconfiguration.
+
+### Refactor
+
+- Don't update message state to `OutMdnRcvd` anymore.
+
+### Build system
+
+- Use workspace dependencies to make cargo-deny 0.15.1 happy.
+- cargo: Update bytemuck from 0.14.3 to 0.16.3.
+- cargo: Bump toml from 0.8.14 to 0.8.15.
+- cargo: Bump serde_json from 1.0.120 to 1.0.122.
+- cargo: Bump human-panic from 2.0.0 to 2.0.1.
+- cargo: Bump thiserror from 1.0.61 to 1.0.63.
+- cargo: Bump syn from 2.0.68 to 2.0.72.
+- cargo: Bump quoted_printable from 0.5.0 to 0.5.1.
+- cargo: Bump serde from 1.0.203 to 1.0.204.
+
+## [1.142.1] - 2024-07-30
+
+### Features / Changes
+
+- Do not reveal sender's language in read receipts ([#5802](https://github.com/deltachat/deltachat-core-rust/pull/5802)).
+- Try next DNS resolution result if TLS setup fails.
+- Report first error instead of the last on connection failure.
+
+### Fixes
+
+- smtp: Use DNS cache for implicit TLS connections.
+- Imex::import_backup: Unpack all blobs before importing a db ([#4307](https://github.com/deltachat/deltachat-core-rust/pull/4307)).
+- Import_backup_stream: Fix progress stucking at 0.
+- Sql::import: Detach backup db if any step of the import fails.
+- Imex::import_backup: Ignore errors from delete_and_reset_all_device_msgs().
+- Explicitly close the database on account removal.
+
+### Miscellaneous Tasks
+
+- cargo: Update time from 0.3.34 to 0.3.36.
+- cargo: Update iroh from 0.20.0 to 0.21.0.
+
+### Refactor
+
+- Add net/dns submodule.
+- Pass single ALPN around instead of ALPN list.
+- Replace {IMAP,SMTP,HTTP}_TIMEOUT with a single constant.
+- smtp: Unify SMTP connection setup between TLS and STARTTLS.
+- imap: Unify IMAP connection setup in Client::connect().
+- Move DNS resolution into IMAP and SMTP connect code.
+
+### CI
+
+- Update Rust to 1.80.0.
+
+## [1.142.0] - 2024-07-23
+
+### API-Changes
+
+- deltachat-jsonrpc: Add `pinned` property to `FullChat` and `BasicChat`.
+- deltachat-jsonrpc: Allow to set message quote text without referencing quoted message ([#5695](https://github.com/deltachat/deltachat-core-rust/pull/5695)).
+
+### Features / Changes
+
+- cargo: Update iroh from 0.17 to 0.20.
+- iroh: Pass direct addresses from Endpoint to Gossip.
+- New BACKUP2 transfer protocol.
+- Use `[...]` instead of `...` for protected subject.
+- Add email address and fingerprint to exported key file names ([#5694](https://github.com/deltachat/deltachat-core-rust/pull/5694)).
+- Request `imap` ALPN for IMAP TLS connections and `smtp` ALPN for SMTP TLS connections.
+- Limit the size of aggregated WebXDC update to 100 KiB ([#4825](https://github.com/deltachat/deltachat-core-rust/pull/4825)).
+- Don't create ad-hoc group on a member removal message ([#5618](https://github.com/deltachat/deltachat-core-rust/pull/5618)).
+- Don't unarchive a group on a member removal except SELF ([#5618](https://github.com/deltachat/deltachat-core-rust/pull/5618)).
+- Use custom DNS resolver for HTTP(S).
+- Promote fallback DNS results to cached on successful use.
+- Set summary thumbnail path for WebXDCs to "webxdc-icon://last-msg-id" ([#5782](https://github.com/deltachat/deltachat-core-rust/pull/5782)).
+- Do not show the address in invite QR code SVG.
+- Report better error from DcKey::from_asc() ([#5539](https://github.com/deltachat/deltachat-core-rust/pull/5539)).
+- Contact::create_ex: Don't send sync message if nothing changed ([#5705](https://github.com/deltachat/deltachat-core-rust/pull/5705)).
+
+### Fixes
+
+- `Message::set_quote`: Don't forget to remove `Param::ProtectQuote`.
+- Randomize avatar blob filenames to work around caching.
+- Correct copy-pasted DCACCOUNT parsing errors message.
+- Call `send_sync_msg()` only from the SMTP loop ([#5780](https://github.com/deltachat/deltachat-core-rust/pull/5780)).
+- Emit MsgsChanged if the number of unnoticed archived chats could decrease ([#5768](https://github.com/deltachat/deltachat-core-rust/pull/5768)).
+- Reject message with forged From even if no valid signatures are found.
+
+### Refactor
+
+- Move key transfer into its own submodule.
+- Move TempPathGuard into `tools` and use instead of `DeleteOnDrop`.
+- Return error from export_backup() without logging.
+- Reduce boilerplate for migration version increment.
+
+### Tests
+
+- Add test for `get_http_response` JSON-RPC call.
+
+### Build system
+
+- node: Pin node-gyp to version 10.1.
+
+### Miscellaneous Tasks
+
+- cargo: Update hashlink to remove allocator-api2 dependency.
+- cargo: Update openssl to v0.10.66.
+- deps: Bump openssl from 0.10.60 to 0.10.66 in /fuzz.
+- cargo: Update `image` crate to 0.25.2.
+
 ## [1.141.2] - 2024-07-09
 
 ### Features / Changes
@@ -24,7 +279,7 @@
 - Protect from reusing migration versions ([#5719](https://github.com/deltachat/deltachat-core-rust/pull/5719)).
 - Move `quota_needs_update` calculation to a separate function ([#5683](https://github.com/deltachat/deltachat-core-rust/pull/5683)).
 
-### Other
+### Documentation
 
 - Document vCards in the specification ([#5724](https://github.com/deltachat/deltachat-core-rust/pull/5724))
 
@@ -4538,3 +4793,16 @@ https://github.com/deltachat/deltachat-core-rust/pulls?q=is%3Apr+is%3Aclosed
 [1.141.0]: https://github.com/deltachat/deltachat-core-rust/compare/v1.140.2...v1.141.0
 [1.141.1]: https://github.com/deltachat/deltachat-core-rust/compare/v1.141.0...v1.141.1
 [1.141.2]: https://github.com/deltachat/deltachat-core-rust/compare/v1.141.1...v1.141.2
+[1.142.0]: https://github.com/deltachat/deltachat-core-rust/compare/v1.141.2...v1.142.0
+[1.142.1]: https://github.com/deltachat/deltachat-core-rust/compare/v1.142.0...v1.142.1
+[1.142.2]: https://github.com/deltachat/deltachat-core-rust/compare/v1.142.1...v1.142.2
+[1.142.3]: https://github.com/deltachat/deltachat-core-rust/compare/v1.142.2...v1.142.3
+[1.142.4]: https://github.com/deltachat/deltachat-core-rust/compare/v1.142.3...v1.142.4
+[1.142.5]: https://github.com/deltachat/deltachat-core-rust/compare/v1.142.4...v1.142.5
+[1.142.6]: https://github.com/deltachat/deltachat-core-rust/compare/v1.142.5...v1.142.6
+[1.142.7]: https://github.com/deltachat/deltachat-core-rust/compare/v1.142.6...v1.142.7
+[1.142.8]: https://github.com/deltachat/deltachat-core-rust/compare/v1.142.7...v1.142.8
+[1.142.9]: https://github.com/deltachat/deltachat-core-rust/compare/v1.142.8...v1.142.9
+[1.142.10]: https://github.com/deltachat/deltachat-core-rust/compare/v1.142.9..v1.142.10
+[1.142.11]: https://github.com/deltachat/deltachat-core-rust/compare/v1.142.10..v1.142.11
+[1.142.12]: https://github.com/deltachat/deltachat-core-rust/compare/v1.142.11..v1.142.12

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "deltachat"
-version = "1.141.2"
+version = "1.142.12"
 edition = "2021"
 license = "MPL-2.0"
 rust-version = "1.77"
@@ -34,7 +34,7 @@ strip = true
 [dependencies]
 deltachat_derive = { path = "./deltachat_derive" }
 deltachat-time = { path = "./deltachat-time" }
-deltachat-contact-tools = { path = "./deltachat-contact-tools" }
+deltachat-contact-tools = { workspace = true }
 format-flowed = { path = "./format-flowed" }
 ratelimit = { path = "./deltachat-ratelimit" }
 
@@ -45,7 +45,6 @@ async-imap = { version = "0.9.7", default-features = false, features = ["runtime
 async-native-tls = { version = "0.5", default-features = false, features = ["runtime-tokio"] }
 async-smtp = { version = "0.9", default-features = false, features = ["runtime-tokio"] }
 async_zip = { version = "0.0.12", default-features = false, features = ["deflate", "fs"] }
-backtrace = "0.3"
 base64 = { workspace = true }
 brotli = { version = "6", default-features=false, features = ["std"] }
 chrono = { workspace = true, features = ["alloc", "clock", "std"] }
@@ -61,9 +60,8 @@ hickory-resolver = "0.24"
 humansize = "2"
 image = { version = "0.25.1", default-features=false, features = ["gif", "jpeg", "ico", "png", "pnm", "webp", "bmp"] }
 iroh_old = { version = "0.4.2", default-features = false, package = "iroh"}
-iroh-net = "0.17.0"
-iroh-gossip = { version = "0.17.0", features = ["net"] }
-quinn = "0.10.0"
+iroh-net = { version = "0.22.0", default-features = false }
+iroh-gossip = { version = "0.22.0", default-features = false, features = ["net"] }
 kamadak-exif = "0.5.3"
 lettre_email = { git = "https://github.com/deltachat/lettre", branch = "master" }
 libc = { workspace = true }
@@ -75,20 +73,19 @@ num-traits = { workspace = true }
 once_cell = { workspace = true }
 percent-encoding = "2.3"
 parking_lot = "0.12"
-pgp = { version = "0.13", default-features = false }
+pgp = { version = "0.13.2", default-features = false }
 qrcodegen = "1.7.0"
-quick-xml = "0.35"
+quick-xml = "0.36"
 quoted_printable = "0.5"
 rand = { workspace = true }
 regex = { workspace = true }
-reqwest = { version = "0.11.27", features = ["json"] }
+reqwest = { version = "0.12.5", features = ["json"] }
 rusqlite = { workspace = true, features = ["sqlcipher"] }
 rust-hsluv = "0.1"
 sanitize-filename = { workspace = true }
 serde_json = { workspace = true }
 serde = { workspace = true, features = ["derive"] }
 sha-1 = "0.10"
-sha2 = "0.10"
 smallvec = "1.13.2"
 strum = "0.26"
 strum_macros = "0.26"
@@ -163,6 +160,9 @@ ansi_term = "0.12.1"
 async-channel = "2.3.1"
 base64 = "0.22"
 chrono = { version = "0.4.38", default-features = false }
+deltachat-contact-tools = { path = "deltachat-contact-tools" }
+deltachat-jsonrpc = { path = "deltachat-jsonrpc" }
+deltachat = { path = "." }
 futures = "0.3.30"
 futures-lite = "2.3.0"
 libc = "0.2"
@@ -171,13 +171,20 @@ num-traits = "0.2"
 once_cell = "1.18.0"
 rand = "0.8"
 regex = "1.10"
-rusqlite = "0.31"
+rusqlite = "0.32"
 sanitize-filename = "0.5"
 serde_json = "1"
 serde = "1.0"
 tempfile = "3.10.1"
 thiserror = "1"
-tokio = "1.38.0"
+
+# 1.38 is the latest version before `mio` dependency update
+# that broke compilation with Android NDK r23c and r24.
+# Version 1.39.0 cannot be compiled using these NDKs,
+# see issue <https://github.com/tokio-rs/tokio/issues/6748>
+# for details.
+tokio = "~1.38.1"
+
 tokio-util = "0.7.11"
 tracing-subscriber = "0.3"
 yerpc = "0.6.2"
@@ -190,3 +197,6 @@ vendored = [
   "rusqlite/bundled-sqlcipher-vendored-openssl",
   "reqwest/native-tls-vendored"
 ]
+
+[lints.rust]
+unexpected_cfgs = { level = "warn", check-cfg = ['cfg(fuzzing)'] }

README.md

@@ -30,13 +30,13 @@ $ curl https://sh.rustup.rs -sSf | sh
 Compile and run Delta Chat Core command line utility, using `cargo`:
 
 ```
-$ cargo run -p deltachat-repl -- ~/deltachat-db
+$ cargo run --locked -p deltachat-repl -- ~/deltachat-db
 ```
 where ~/deltachat-db is the database file. Delta Chat will create it if it does not exist.
 
 Optionally, install `deltachat-repl` binary with
 ```
-$ cargo install --path deltachat-repl/
+$ cargo install --locked --path deltachat-repl/
 ```
 and run as
 ```

deltachat-ffi/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "deltachat_ffi"
-version = "1.141.2"
+version = "1.142.12"
 description = "Deltachat FFI"
 edition = "2018"
 readme = "README.md"
@@ -14,8 +14,8 @@ name = "deltachat"
 crate-type = ["cdylib", "staticlib"]
 
 [dependencies]
-deltachat = { path = "../", default-features = false }
-deltachat-jsonrpc = { path = "../deltachat-jsonrpc", optional = true }
+deltachat = { workspace = true, default-features = false }
+deltachat-jsonrpc = { workspace = true, optional = true }
 libc = { workspace = true }
 human-panic = { version = "2", default-features = false }
 num-traits = { workspace = true }
@@ -29,6 +29,6 @@ yerpc = { workspace = true, features = ["anyhow_expose"] }
 
 [features]
 default = ["vendored"]
-vendored = ["deltachat/vendored"]
+vendored = ["deltachat/vendored", "deltachat-jsonrpc/vendored"]
 jsonrpc = ["dep:deltachat-jsonrpc"]
 

deltachat-ffi/deltachat.h

@@ -409,7 +409,7 @@ char*           dc_get_blobdir               (const dc_context_t* context);
  * - `socks5_user` = SOCKS5 proxy username
  * - `socks5_password` = SOCKS5 proxy password
  * - `imap_certificate_checks` = how to check IMAP certificates, one of the @ref DC_CERTCK flags, defaults to #DC_CERTCK_AUTO (0)
- * - `smtp_certificate_checks` = how to check SMTP certificates, one of the @ref DC_CERTCK flags, defaults to #DC_CERTCK_AUTO (0)
+ * - `smtp_certificate_checks` = deprecated option, should be set to the same value as `imap_certificate_checks` but ignored by the new core
  * - `displayname`  = Own name to use when sending messages. MUAs are allowed to spread this way e.g. using CC, defaults to empty
  * - `selfstatus`   = Own status to display, e.g. in e-mail footers, defaults to empty
  * - `selfavatar`   = File containing avatar. Will immediately be copied to the 
@@ -420,7 +420,8 @@ char*           dc_get_blobdir               (const dc_context_t* context);
  *                    and also recoded to a reasonable size.
  * - `e2ee_enabled` = 0=no end-to-end-encryption, 1=prefer end-to-end-encryption (default)
  * - `mdns_enabled` = 0=do not send or request read receipts,
- *                    1=send and request read receipts (default)
+ *                    1=send and request read receipts
+ *                    default=send and request read receipts, only send but not reuqest if `bot` is set
  * - `bcc_self`     = 0=do not send a copy of outgoing messages to self (default),
  *                    1=send a copy of outgoing messages to self.
  *                    Sending messages to self is needed for a proper multi-account setup,
@@ -2504,6 +2505,7 @@ void            dc_stop_ongoing_process      (dc_context_t* context);
 #define         DC_QR_FPR_WITHOUT_ADDR       230 // test1=formatted fingerprint
 #define         DC_QR_ACCOUNT                250 // text1=domain
 #define         DC_QR_BACKUP                 251
+#define         DC_QR_BACKUP2                252
 #define         DC_QR_WEBRTC_INSTANCE        260 // text1=domain, text2=instance pattern
 #define         DC_QR_ADDR                   320 // id=contact
 #define         DC_QR_TEXT                   330 // text1=text
@@ -2550,6 +2552,7 @@ void            dc_stop_ongoing_process      (dc_context_t* context);
  *   if so, call dc_set_config_from_qr() and then dc_configure().
  *
  * - DC_QR_BACKUP:
+ * - DC_QR_BACKUP2:
  *   ask the user if they want to set up a new device.
  *   If so, pass the qr-code to dc_receive_backup().
  *
@@ -6648,6 +6651,8 @@ void dc_event_unref(dc_event_t* event);
 /// "Message opened"
 ///
 /// Used in subjects of outgoing read receipts.
+///
+/// @deprecated Deprecated 2024-07-26
 #define DC_STR_READRCPT                   31
 
 /// "The message '%1$s' you sent was displayed on the screen of the recipient."
@@ -6655,7 +6660,7 @@ void dc_event_unref(dc_event_t* event);
 /// Used as message text of outgoing read receipts.
 /// - %1$s will be replaced by the subject of the displayed message
 ///
-/// @deprecated Deprecated 2024-06-23, use DC_STR_READRCPT_MAILBODY2 instead.
+/// @deprecated Deprecated 2024-06-23
 #define DC_STR_READRCPT_MAILBODY          32
 
 /// @deprecated Deprecated, this string is no longer needed.
@@ -7374,11 +7379,6 @@ void dc_event_unref(dc_event_t* event);
 /// Used as info message.
 #define DC_STR_SECUREJOIN_WAIT_TIMEOUT 191
 
-/// "The message is a receipt notification."
-///
-/// Used as message text of outgoing read receipts.
-#define DC_STR_READRCPT_MAILBODY2 192
-
 /// "Contact". Deprecated, currently unused.
 #define DC_STR_CONTACT 200
 

deltachat-ffi/src/lib.rs

@@ -4364,7 +4364,7 @@ pub unsafe extern "C" fn dc_backup_provider_wait(provider: *mut dc_backup_provid
     let ctx = &*ffi_provider.context;
     let provider = &mut ffi_provider.provider;
     block_on(provider)
-        .context("Failed to await BackupProvider")
+        .context("Failed to await backup provider")
         .log_err(ctx)
         .set_last_error(ctx)
         .ok();
@@ -4418,7 +4418,7 @@ trait ResultExt<T, E> {
     /// Like `log_err()`, but:
     /// - returns the default value instead of an Err value.
     /// - emits an error instead of a warning for an [Err] result. This means
-    /// that the error will be shown to the user in a small pop-up.
+    ///   that the error will be shown to the user in a small pop-up.
     fn unwrap_or_log_default(self, context: &context::Context, message: &str) -> T;
 }
 

deltachat-ffi/src/lot.rs

@@ -50,6 +50,7 @@ impl Lot {
                 Qr::FprWithoutAddr { fingerprint, .. } => Some(fingerprint),
                 Qr::Account { domain } => Some(domain),
                 Qr::Backup { .. } => None,
+                Qr::Backup2 { .. } => None,
                 Qr::WebrtcInstance { domain, .. } => Some(domain),
                 Qr::Addr { draft, .. } => draft.as_deref(),
                 Qr::Url { url } => Some(url),
@@ -102,6 +103,7 @@ impl Lot {
                 Qr::FprWithoutAddr { .. } => LotState::QrFprWithoutAddr,
                 Qr::Account { .. } => LotState::QrAccount,
                 Qr::Backup { .. } => LotState::QrBackup,
+                Qr::Backup2 { .. } => LotState::QrBackup2,
                 Qr::WebrtcInstance { .. } => LotState::QrWebrtcInstance,
                 Qr::Addr { .. } => LotState::QrAddr,
                 Qr::Url { .. } => LotState::QrUrl,
@@ -127,6 +129,7 @@ impl Lot {
                 Qr::FprWithoutAddr { .. } => Default::default(),
                 Qr::Account { .. } => Default::default(),
                 Qr::Backup { .. } => Default::default(),
+                Qr::Backup2 { .. } => Default::default(),
                 Qr::WebrtcInstance { .. } => Default::default(),
                 Qr::Addr { contact_id, .. } => contact_id.to_u32(),
                 Qr::Url { .. } => Default::default(),
@@ -177,6 +180,8 @@ pub enum LotState {
 
     QrBackup = 251,
 
+    QrBackup2 = 252,
+
     /// text1=domain, text2=instance pattern
     QrWebrtcInstance = 260,
 

deltachat-jsonrpc/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "deltachat-jsonrpc"
-version = "1.141.2"
+version = "1.142.12"
 description = "DeltaChat JSON-RPC API"
 edition = "2021"
 default-run = "deltachat-jsonrpc-server"
@@ -14,8 +14,8 @@ required-features = ["webserver"]
 
 [dependencies]
 anyhow = { workspace = true }
-deltachat = { path = ".." }
-deltachat-contact-tools = { path = "../deltachat-contact-tools" }
+deltachat = { workspace = true }
+deltachat-contact-tools = { workspace = true }
 num-traits = { workspace = true }
 schemars = "0.8.21"
 serde = { workspace = true, features = ["derive"] }
@@ -33,7 +33,7 @@ base64 = { workspace = true }
 
 # optional dependencies
 axum = { version = "0.7", optional = true, features = ["ws"] }
-env_logger = { version = "0.11.3", optional = true }
+env_logger = { version = "0.11.5", optional = true }
 
 [dev-dependencies]
 tokio = { workspace = true, features = ["full", "rt-multi-thread"] }

deltachat-jsonrpc/src/api.rs

@@ -1672,10 +1672,10 @@ impl CommandApi {
     ///
     /// This call will block until the QR code is ready,
     /// even if there is no concurrent call to [`CommandApi::provide_backup`],
-    /// but will fail after 10 seconds to avoid deadlocks.
+    /// but will fail after 60 seconds to avoid deadlocks.
     async fn get_backup_qr(&self, account_id: u32) -> Result<String> {
         let qr = tokio::time::timeout(
-            Duration::from_secs(10),
+            Duration::from_secs(60),
             self.inner_get_backup_qr(account_id),
         )
         .await
@@ -1691,13 +1691,13 @@ impl CommandApi {
     ///
     /// This call will block until the QR code is ready,
     /// even if there is no concurrent call to [`CommandApi::provide_backup`],
-    /// but will fail after 10 seconds to avoid deadlocks.
+    /// but will fail after 60 seconds to avoid deadlocks.
     ///
     /// Returns the QR code rendered as an SVG image.
     async fn get_backup_qr_svg(&self, account_id: u32) -> Result<String> {
         let ctx = self.get_context(account_id).await?;
         let qr = tokio::time::timeout(
-            Duration::from_secs(10),
+            Duration::from_secs(60),
             self.inner_get_backup_qr(account_id),
         )
         .await

deltachat-jsonrpc/src/api/types/chat.rs

@@ -32,6 +32,7 @@ pub struct FullChat {
     is_protected: bool,
     profile_image: Option<String>, //BLOBS ?
     archived: bool,
+    pinned: bool,
     // subtitle  - will be moved to frontend because it uses translation functions
     chat_type: u32,
     is_unpromoted: bool,
@@ -104,6 +105,7 @@ impl FullChat {
             is_protected: chat.is_protected(),
             profile_image, //BLOBS ?
             archived: chat.get_visibility() == chat::ChatVisibility::Archived,
+            pinned: chat.get_visibility() == chat::ChatVisibility::Pinned,
             chat_type: chat.get_type().to_u32().context("unknown chat type id")?,
             is_unpromoted: chat.is_unpromoted(),
             is_self_talk: chat.is_self_talk(),
@@ -153,6 +155,7 @@ pub struct BasicChat {
     is_protected: bool,
     profile_image: Option<String>, //BLOBS ?
     archived: bool,
+    pinned: bool,
     chat_type: u32,
     is_unpromoted: bool,
     is_self_talk: bool,
@@ -180,6 +183,7 @@ impl BasicChat {
             is_protected: chat.is_protected(),
             profile_image, //BLOBS ?
             archived: chat.get_visibility() == chat::ChatVisibility::Archived,
+            pinned: chat.get_visibility() == chat::ChatVisibility::Pinned,
             chat_type: chat.get_type().to_u32().context("unknown chat type id")?,
             is_unpromoted: chat.is_unpromoted(),
             is_self_talk: chat.is_self_talk(),

deltachat-jsonrpc/src/api/types/contact.rs

@@ -19,6 +19,7 @@ pub struct ContactObject {
     profile_image: Option<String>, // BLOBS
     name_and_addr: String,
     is_blocked: bool,
+    e2ee_avail: bool,
 
     /// True if the contact can be added to verified groups.
     ///
@@ -79,6 +80,7 @@ impl ContactObject {
             profile_image, //BLOBS
             name_and_addr: contact.get_name_n_addr(),
             is_blocked: contact.is_blocked(),
+            e2ee_avail: contact.e2ee_avail(context).await?,
             is_verified,
             is_profile_verified,
             verifier_id,

deltachat-jsonrpc/src/api/types/message.rs

@@ -577,7 +577,9 @@ pub struct MessageData {
     pub file: Option<String>,
     pub location: Option<(f64, f64)>,
     pub override_sender_name: Option<String>,
+    /// Quoted message id. Takes preference over `quoted_text` (see below).
     pub quoted_message_id: Option<u32>,
+    pub quoted_text: Option<String>,
 }
 
 impl MessageData {
@@ -613,6 +615,9 @@ impl MessageData {
                     ),
                 )
                 .await?;
+        } else if let Some(text) = self.quoted_text {
+            let protect = false;
+            message.set_quote_text(Some((text, protect)));
         }
         Ok(message)
     }

deltachat-jsonrpc/src/api/types/qr.rs

@@ -35,6 +35,11 @@ pub enum QrObject {
     Backup {
         ticket: String,
     },
+    Backup2 {
+        auth_token: String,
+
+        node_addr: String,
+    },
     WebrtcInstance {
         domain: String,
         instance_pattern: String,
@@ -132,6 +137,14 @@ impl From<Qr> for QrObject {
             Qr::Backup { ticket } => QrObject::Backup {
                 ticket: ticket.to_string(),
             },
+            Qr::Backup2 {
+                ref node_addr,
+                auth_token,
+            } => QrObject::Backup2 {
+                node_addr: serde_json::to_string(node_addr).unwrap_or_default(),
+
+                auth_token,
+            },
             Qr::WebrtcInstance {
                 domain,
                 instance_pattern,

deltachat-jsonrpc/typescript/package.json

@@ -58,5 +58,5 @@
   },
   "type": "module",
   "types": "dist/deltachat.d.ts",
-  "version": "1.141.2"
+  "version": "1.142.12"
 }

deltachat-repl/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "deltachat-repl"
-version = "1.141.2"
+version = "1.142.12"
 license = "MPL-2.0"
 edition = "2021"
 repository = "https://github.com/deltachat/deltachat-core-rust"
@@ -8,7 +8,7 @@ repository = "https://github.com/deltachat/deltachat-core-rust"
 [dependencies]
 ansi_term = { workspace = true }
 anyhow = { workspace = true }
-deltachat = { path = "..", features = ["internals"]}
+deltachat = { workspace = true, features = ["internals"]}
 dirs = "5"
 log = { workspace = true }
 rusqlite = { workspace = true }

deltachat-repl/src/cmdline.rs

@@ -339,7 +339,6 @@ pub async fn cmdline(context: Context, line: &str, chat_id: &mut ChatId) -> Resu
                  receive-backup <qr>\n\
                  export-keys\n\
                  import-keys\n\
-                 export-setup\n\
                  poke [<eml-file>|<folder>|<addr> <key-file>]\n\
                  reset <flags>\n\
                  stop\n\
@@ -504,17 +503,6 @@ pub async fn cmdline(context: Context, line: &str, chat_id: &mut ChatId) -> Resu
         "import-keys" => {
             imex(&context, ImexMode::ImportSelfKeys, arg1.as_ref(), None).await?;
         }
-        "export-setup" => {
-            let setup_code = create_setup_code(&context);
-            let file_name = blobdir.join("autocrypt-setup-message.html");
-            let file_content = render_setup_file(&context, &setup_code).await?;
-            fs::write(&file_name, file_content).await?;
-            println!(
-                "Setup message written to: {}\nSetup code: {}",
-                file_name.display(),
-                &setup_code,
-            );
-        }
         "poke" => {
             ensure!(poke_spec(&context, Some(arg1)).await, "Poke failed");
         }

deltachat-repl/src/main.rs

@@ -152,7 +152,7 @@ impl Completer for DcHelper {
     }
 }
 
-const IMEX_COMMANDS: [&str; 14] = [
+const IMEX_COMMANDS: [&str; 13] = [
     "initiate-key-transfer",
     "get-setupcodebegin",
     "continue-key-transfer",
@@ -163,7 +163,6 @@ const IMEX_COMMANDS: [&str; 14] = [
     "receive-backup",
     "export-keys",
     "import-keys",
-    "export-setup",
     "poke",
     "reset",
     "stop",

deltachat-rpc-client/pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "deltachat-rpc-client"
-version = "1.141.2"
+version = "1.142.12"
 description = "Python client for Delta Chat core JSON-RPC interface"
 classifiers = [
     "Development Status :: 5 - Production/Stable",

deltachat-rpc-client/src/deltachat_rpc_client/pytestplugin.py

@@ -114,13 +114,13 @@ class ACFactory:
         return to_client.run_until(lambda e: e.kind == EventType.INCOMING_MSG)
 
 
-@pytest.fixture()
+@pytest.fixture
 def rpc(tmp_path) -> AsyncGenerator:
     rpc_server = Rpc(accounts_dir=str(tmp_path / "accounts"))
     with rpc_server:
         yield rpc_server
 
 
-@pytest.fixture()
+@pytest.fixture
 def acfactory(rpc) -> AsyncGenerator:
     return ACFactory(DeltaChat(rpc))

deltachat-rpc-client/tests/test_chatlist_events.py

@@ -210,6 +210,7 @@ def test_multidevice_sync_chat(acfactory: ACFactory) -> None:
     alice_second_device.clear_all_events()
     alice_chat_bob.pin()
     wait_for_chatlist_specific_item(alice_second_device, alice_chat_bob.id)
+    assert alice_second_device.get_chat_by_id(alice_chat_bob.id).get_basic_snapshot().pinned
 
     alice_second_device.clear_all_events()
     alice_chat_bob.mute()

deltachat-rpc-client/tests/test_iroh_webxdc.py

@@ -12,10 +12,11 @@ import threading
 import time
 
 import pytest
+
 from deltachat_rpc_client import EventType
 
 
-@pytest.fixture()
+@pytest.fixture
 def path_to_webxdc(request):
     p = request.path.parent.parent.parent.joinpath("test-data/webxdc/chess.xdc")
     assert p.exists()

deltachat-rpc-client/tests/test_securejoin.py

@@ -1,6 +1,7 @@
 import logging
 
 import pytest
+
 from deltachat_rpc_client import Chat, EventType, SpecialContactId
 
 
@@ -30,17 +31,46 @@ def test_qr_setup_contact(acfactory, tmp_path) -> None:
     bob2.export_self_keys(tmp_path)
 
     logging.info("Bob imports a key")
-    bob.import_self_keys(tmp_path / "private-key-default.asc")
+    bob.import_self_keys(tmp_path)
 
     assert bob.get_config("key_id") == "2"
     bob_contact_alice_snapshot = bob_contact_alice.get_snapshot()
     assert not bob_contact_alice_snapshot.is_verified
 
 
+def test_qr_setup_contact_svg(acfactory) -> None:
+    alice = acfactory.new_configured_account()
+    _, _, domain = alice.get_config("addr").rpartition("@")
+
+    _qr_code, svg = alice.get_qr_code_svg()
+
+    # Test that email address is in SVG
+    # when we have no display name.
+    # Check only the domain name, because
+    # long address may be split over multiple lines
+    # and not matched.
+    assert domain in svg
+
+    alice.set_config("displayname", "Alice")
+
+    # Test that display name is used
+    # in SVG and no address is visible.
+    _qr_code, svg = alice.get_qr_code_svg()
+    assert domain not in svg
+    assert "Alice" in svg
+
+
 @pytest.mark.parametrize("protect", [True, False])
-def test_qr_securejoin(acfactory, protect):
+def test_qr_securejoin(acfactory, protect, tmp_path):
     alice, bob = acfactory.get_online_accounts(2)
 
+    # Setup second device for Alice
+    # to test observing securejoin protocol.
+    alice.export_backup(tmp_path)
+    files = list(tmp_path.glob("*.tar"))
+    alice2 = acfactory.get_unconfigured_account()
+    alice2.import_backup(files[0])
+
     logging.info("Alice creates a verified group")
     alice_chat = alice.create_group("Verified group", protect=protect)
     assert alice_chat.get_basic_snapshot().is_protected == protect
@@ -74,6 +104,14 @@ def test_qr_securejoin(acfactory, protect):
     bob_contact_alice_snapshot = bob_contact_alice.get_snapshot()
     assert bob_contact_alice_snapshot.is_verified
 
+    # Start second Alice device.
+    # Alice observes securejoin protocol and verifies Bob on second device.
+    alice2.start_io()
+    alice2.wait_for_securejoin_inviter_success()
+    alice2_contact_bob = alice2.get_contact_by_addr(bob.get_config("addr"))
+    alice2_contact_bob_snapshot = alice2_contact_bob.get_snapshot()
+    assert alice2_contact_bob_snapshot.is_verified
+
 
 def test_qr_securejoin_contact_request(acfactory) -> None:
     """Alice invites Bob to a group when Bob's chat with Alice is in a contact request mode."""

deltachat-rpc-client/tests/test_something.py

@@ -1,12 +1,15 @@
+import base64
 import concurrent.futures
 import json
 import logging
 import os
+import socket
 import subprocess
 import time
 from unittest.mock import MagicMock
 
 import pytest
+
 from deltachat_rpc_client import Contact, EventType, Message, events
 from deltachat_rpc_client.const import DownloadState, MessageState
 from deltachat_rpc_client.direct_imap import DirectImap
@@ -68,6 +71,18 @@ def test_configure_starttls(acfactory) -> None:
     assert account.is_configured()
 
 
+def test_configure_ip(acfactory) -> None:
+    account = acfactory.new_preconfigured_account()
+
+    domain = account.get_config("addr").rsplit("@")[-1]
+    ip_address = socket.gethostbyname(domain)
+
+    # This should fail TLS check.
+    account.set_config("mail_server", ip_address)
+    with pytest.raises(JsonRpcError):
+        account.configure()
+
+
 def test_account(acfactory) -> None:
     alice, bob = acfactory.get_online_accounts(2)
 
@@ -103,12 +118,12 @@ def test_account(acfactory) -> None:
     assert alice.get_chatlist(snapshot=True)
     assert alice.get_qr_code()
     assert alice.get_fresh_messages()
-    assert alice.get_next_messages()
 
     # Test sending empty message.
     assert len(bob.wait_next_messages()) == 0
     alice_chat_bob.send_text("")
     messages = bob.wait_next_messages()
+    assert bob.get_next_messages() == messages
     assert len(messages) == 1
     message = messages[0]
     snapshot = message.get_snapshot()
@@ -613,3 +628,31 @@ def test_markseen_contact_request(acfactory, tmp_path):
         if event.kind == EventType.MSGS_NOTICED:
             break
     assert message2.get_snapshot().state == MessageState.IN_SEEN
+
+
+def test_get_http_response(acfactory):
+    alice = acfactory.new_configured_account()
+    http_response = alice._rpc.get_http_response(alice.id, "https://example.org")
+    assert http_response["mimetype"] == "text/html"
+    assert b"<title>Example Domain</title>" in base64.b64decode((http_response["blob"] + "==").encode())
+
+
+def test_configured_imap_certificate_checks(acfactory):
+    alice = acfactory.new_configured_account()
+    configured_certificate_checks = alice.get_config("configured_imap_certificate_checks")
+
+    # Certificate checks should be configured (not None)
+    assert configured_certificate_checks
+
+    # 0 is the value old Delta Chat core versions used
+    # to mean user entered "imap_certificate_checks=0" (Automatic)
+    # and configuration failed to use strict TLS checks
+    # so it switched strict TLS checks off.
+    #
+    # New versions of Delta Chat are not disabling TLS checks
+    # unless users explicitly disables them
+    # or provider database says provider has invalid certificates.
+    #
+    # Core 1.142.4, 1.142.5 and 1.142.6 saved this value due to bug.
+    # This test is a regression test to prevent this happening again.
+    assert configured_certificate_checks != "0"

deltachat-rpc-server/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "deltachat-rpc-server"
-version = "1.141.2"
+version = "1.142.12"
 description = "DeltaChat JSON-RPC server"
 edition = "2021"
 readme = "README.md"
@@ -10,8 +10,8 @@ keywords = ["deltachat", "chat", "openpgp", "email", "encryption"]
 categories = ["cryptography", "std", "email"]
 
 [dependencies]
-deltachat-jsonrpc = { path = "../deltachat-jsonrpc", default-features = false }
-deltachat = { path = "..", default-features = false }
+deltachat-jsonrpc = { workspace = true }
+deltachat = { workspace = true }
 
 anyhow = { workspace = true }
 futures-lite = { workspace = true }

deltachat-rpc-server/npm-package/package.json

@@ -15,5 +15,5 @@
   },
   "type": "module",
   "types": "index.d.ts",
-  "version": "1.141.2"
+  "version": "1.142.12"
 }

deny.toml

@@ -54,9 +54,9 @@ skip = [
      { name = "fastrand", version = "1.9.0" },
      { name = "futures-lite", version = "1.13.0" },
      { name = "getrandom", version = "<0.2" },
+     { name = "h2", version = "0.3.26" },
      { name = "http-body", version = "0.4.6" },
      { name = "http", version = "0.2.12" },
-     { name = "hyper-rustls", version = "0.24.2" },
      { name = "hyper", version = "0.14.28" },
      { name = "idna", version = "0.4.0" },
      { name = "netlink-packet-core", version = "0.5.0" },
@@ -74,7 +74,6 @@ skip = [
      { name = "redox_syscall", version = "0.3.5" },
      { name = "regex-automata", version = "0.1.10" },
      { name = "regex-syntax", version = "0.6.29" },
-     { name = "reqwest", version = "0.11.27" },
      { name = "ring", version = "0.16.20" },
      { name = "rustls-pemfile", version = "1.0.4" },
      { name = "rustls", version = "0.21.11" },

node/constants.js

@@ -128,6 +128,7 @@ module.exports = {
   DC_QR_ASK_VERIFYCONTACT: 200,
   DC_QR_ASK_VERIFYGROUP: 202,
   DC_QR_BACKUP: 251,
+  DC_QR_BACKUP2: 252,
   DC_QR_ERROR: 400,
   DC_QR_FPR_MISMATCH: 220,
   DC_QR_FPR_OK: 210,
@@ -266,7 +267,6 @@ module.exports = {
   DC_STR_REACTED_BY: 177,
   DC_STR_READRCPT: 31,
   DC_STR_READRCPT_MAILBODY: 32,
-  DC_STR_READRCPT_MAILBODY2: 192,
   DC_STR_REMOVE_MEMBER_BY_OTHER: 131,
   DC_STR_REMOVE_MEMBER_BY_YOU: 130,
   DC_STR_REPLY_NOUN: 90,

node/lib/constants.ts

@@ -128,6 +128,7 @@ export enum C {
   DC_QR_ASK_VERIFYCONTACT = 200,
   DC_QR_ASK_VERIFYGROUP = 202,
   DC_QR_BACKUP = 251,
+  DC_QR_BACKUP2 = 252,
   DC_QR_ERROR = 400,
   DC_QR_FPR_MISMATCH = 220,
   DC_QR_FPR_OK = 210,
@@ -266,7 +267,6 @@ export enum C {
   DC_STR_REACTED_BY = 177,
   DC_STR_READRCPT = 31,
   DC_STR_READRCPT_MAILBODY = 32,
-  DC_STR_READRCPT_MAILBODY2 = 192,
   DC_STR_REMOVE_MEMBER_BY_OTHER = 131,
   DC_STR_REMOVE_MEMBER_BY_YOU = 130,
   DC_STR_REPLY_NOUN = 90,

package.json

@@ -11,7 +11,7 @@
     "chai": "~4.3.10",
     "chai-as-promised": "^7.1.1",
     "mocha": "^8.2.1",
-    "node-gyp": "^10.0.0",
+    "node-gyp": "~10.1.0",
     "prebuildify": "^5.0.1",
     "prebuildify-ci": "^1.0.5",
     "prettier": "^3.0.3",
@@ -55,5 +55,5 @@
     "test:mocha": "mocha node/test/test.mjs --growl --reporter=spec --bail --exit"
   },
   "types": "node/dist/index.d.ts",
-  "version": "1.141.2"
+  "version": "1.142.12"
 }

python/pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "deltachat"
-version = "1.141.2"
+version = "1.142.12"
 description = "Python bindings for the Delta Chat Core library using CFFI against the Rust-implemented libdeltachat"
 readme = "README.rst"
 requires-python = ">=3.7"

python/tests/test_1_online.py

@@ -484,6 +484,16 @@ def test_move_works_on_self_sent(acfactory):
     ac1._evtracker.get_matching("DC_EVENT_IMAP_MESSAGE_MOVED")
 
 
+def test_move_sync_msgs(acfactory):
+    ac1 = acfactory.new_online_configuring_account(bcc_self=True, sync_msgs=True, fix_is_chatmail=True)
+    acfactory.bring_accounts_online()
+
+    ac1.set_config("displayname", "Alice")
+    ac1._evtracker.get_matching("DC_EVENT_IMAP_MESSAGE_MOVED")
+    ac1.set_config("displayname", "Bob")
+    ac1._evtracker.get_matching("DC_EVENT_IMAP_MESSAGE_MOVED")
+
+
 def test_forward_messages(acfactory, lp):
     ac1, ac2 = acfactory.get_online_accounts(2)
     chat = ac1.create_chat(ac2)
@@ -1562,8 +1572,6 @@ def test_import_export_online_all(acfactory, tmp_path, data, lp):
 
         # check progress events for import
         assert imex_tracker.wait_progress(1, progress_upper_limit=249)
-        assert imex_tracker.wait_progress(500, progress_upper_limit=749)
-        assert imex_tracker.wait_progress(750, progress_upper_limit=999)
         assert imex_tracker.wait_progress(1000)
 
     assert_account_is_proper(ac1)

release-date.in

@@ -1 +1 @@
-2024-07-09
+2024-09-02

scripts/coredeps/install-rust.sh

@@ -7,7 +7,7 @@ set -euo pipefail
 #
 # Avoid using rustup here as it depends on reading /proc/self/exe and
 # has problems running under QEMU.
-RUST_VERSION=1.79.0
+RUST_VERSION=1.80.1
 
 ARCH="$(uname -m)"
 test -f "/lib/libc.musl-$ARCH.so.1" && LIBC=musl || LIBC=gnu

scripts/make-rpc-testenv.sh

@@ -3,4 +3,4 @@ set -euo pipefail
 
 tox -c deltachat-rpc-client -e py --devenv venv
 venv/bin/pip install --upgrade pip
-cargo install --path deltachat-rpc-server/ --root "$PWD/venv" --debug
+cargo install --locked --path deltachat-rpc-server/ --root "$PWD/venv" --debug

scripts/run-rpc-test.sh

@@ -1,4 +1,4 @@
 #!/usr/bin/env bash
 set -euo pipefail
-cargo install --path deltachat-rpc-server/ --root "$PWD/venv" --debug
+cargo install --locked --path deltachat-rpc-server/ --root "$PWD/venv" --debug
 PATH="$PWD/venv/bin:$PATH" tox -c deltachat-rpc-client

scripts/update-provider-database.sh

@@ -6,7 +6,7 @@ set -euo pipefail
 export TZ=UTC
 
 # Provider database revision.
-REV=828e5ddc7e6609b582fbd7f063cc3f60b580ce96
+REV=05c1b2029da74718e4bdc3799a46e29c4f794dc7
 
 CORE_ROOT="$PWD"
 TMP="$(mktemp -d)"

src/accounts.rs

@@ -166,6 +166,19 @@ impl Accounts {
             .remove(&id)
             .with_context(|| format!("no account with id {id}"))?;
         ctx.stop_io().await;
+
+        // Explicitly close the database
+        // to make sure the database file is closed
+        // and can be removed on Windows.
+        // If some spawned task tries to use the database afterwards,
+        // it will fail.
+        //
+        // Previously `stop_io()` aborted the tasks without awaiting them
+        // and this resulted in keeping `Context` clones inside
+        // `Future`s that were not dropped. This bug is fixed now,
+        // but explicitly closing the database ensures that file is freed
+        // even if not all `Context` references are dropped.
+        ctx.sql.close().await;
         drop(ctx);
 
         if let Some(cfg) = self.config.get_account(id) {

src/blob.rs

@@ -12,7 +12,7 @@ use anyhow::{format_err, Context as _, Result};
 use base64::Engine as _;
 use futures::StreamExt;
 use image::codecs::jpeg::JpegEncoder;
-use image::io::Reader as ImageReader;
+use image::ImageReader;
 use image::{DynamicImage, GenericImage, GenericImageView, ImageFormat, Pixel, Rgba};
 use num_traits::FromPrimitive;
 use tokio::io::AsyncWriteExt;

src/chat.rs

@@ -49,6 +49,7 @@ use crate::tools::{
     create_smeared_timestamps, get_abs_path, gm2local_offset, smeared_time, time, IsNoneOrEmpty,
     SystemTime,
 };
+use crate::webxdc::StatusUpdateSerial;
 
 /// An chat item, such as a message or a marker.
 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
@@ -1934,7 +1935,7 @@ impl Chat {
             self.param.remove(Param::Unpromoted);
             self.update_param(context).await?;
             // send_sync_msg() is called (usually) a moment later at send_msg_to_smtp()
-            // when the group-creation message is actually sent though SMTP -
+            // when the group creation message is actually sent through SMTP --
             // this makes sure, the other devices are aware of grpid that is used in the sync-message.
             context
                 .sync_qr_code_tokens(Some(self.id))
@@ -2239,7 +2240,7 @@ pub(crate) async fn sync(context: &Context, id: SyncId, action: SyncAction) -> R
     context
         .add_sync_item(SyncData::AlterChat { id, action })
         .await?;
-    context.send_sync_msg().await?;
+    context.scheduler.interrupt_smtp().await;
     Ok(())
 }
 
@@ -3267,35 +3268,25 @@ pub async fn marknoticed_chat(context: &Context, chat_id: ChatId) -> Result<()>
             context.emit_event(EventType::MsgsNoticed(chat_id_in_archive));
             chatlist_events::emit_chatlist_item_changed(context, chat_id_in_archive);
         }
-        chatlist_events::emit_chatlist_item_changed(context, DC_CHAT_ID_ARCHIVED_LINK);
-    } else {
-        let exists = context
-            .sql
-            .exists(
-                "SELECT COUNT(*) FROM msgs WHERE state=? AND hidden=0 AND chat_id=?;",
-                (MessageState::InFresh, chat_id),
-            )
-            .await?;
-        if !exists {
-            return Ok(());
-        }
-
-        context
-            .sql
-            .execute(
-                "UPDATE msgs
-                SET state=?
-              WHERE state=?
-                AND hidden=0
-                AND chat_id=?;",
-                (MessageState::InNoticed, MessageState::InFresh, chat_id),
-            )
-            .await?;
+    } else if context
+        .sql
+        .execute(
+            "UPDATE msgs
+            SET state=?
+          WHERE state=?
+            AND hidden=0
+            AND chat_id=?;",
+            (MessageState::InNoticed, MessageState::InFresh, chat_id),
+        )
+        .await?
+        == 0
+    {
+        return Ok(());
     }
 
     context.emit_event(EventType::MsgsNoticed(chat_id));
     chatlist_events::emit_chatlist_item_changed(context, chat_id);
-
+    context.on_archived_chats_maybe_noticed();
     Ok(())
 }
 
@@ -3358,6 +3349,7 @@ pub(crate) async fn mark_old_messages_as_noticed(
             context,
             "Marking chats as noticed because there are newer outgoing messages: {changed_chats:?}."
         );
+        context.on_archived_chats_maybe_noticed();
     }
 
     for c in changed_chats {
@@ -3737,12 +3729,14 @@ pub(crate) async fn add_contact_to_chat_ex(
     if from_handshake && chat.param.get_int(Param::Unpromoted).unwrap_or_default() == 1 {
         chat.param.remove(Param::Unpromoted);
         chat.update_param(context).await?;
-        let _ = context
+        if context
             .sync_qr_code_tokens(Some(chat_id))
             .await
             .log_err(context)
             .is_ok()
-            && context.send_sync_msg().await.log_err(context).is_ok();
+        {
+            context.scheduler.interrupt_smtp().await;
+        }
     }
 
     if context.is_self_addr(contact.get_addr()).await? {
@@ -4272,9 +4266,39 @@ pub async fn resend_msgs(context: &Context, msg_ids: &[MsgId]) -> Result<()> {
         msg.timestamp_sort = create_smeared_timestamp(context);
         // note(treefit): only matters if it is the last message in chat (but probably to expensive to check, debounce also solves it)
         chatlist_events::emit_chatlist_item_changed(context, msg.chat_id);
-        if !create_send_msg_jobs(context, &mut msg).await?.is_empty() {
-            context.scheduler.interrupt_smtp().await;
+        if create_send_msg_jobs(context, &mut msg).await?.is_empty() {
+            continue;
         }
+        if msg.viewtype == Viewtype::Webxdc {
+            let conn_fn = |conn: &mut rusqlite::Connection| {
+                let range = conn.query_row(
+                    "SELECT IFNULL(min(id), 1), IFNULL(max(id), 0) \
+                     FROM msgs_status_updates WHERE msg_id=?",
+                    (msg.id,),
+                    |row| {
+                        let min_id: StatusUpdateSerial = row.get(0)?;
+                        let max_id: StatusUpdateSerial = row.get(1)?;
+                        Ok((min_id, max_id))
+                    },
+                )?;
+                if range.0 > range.1 {
+                    return Ok(());
+                };
+                // `first_serial` must be decreased, otherwise if `Context::flush_status_updates()`
+                // runs in parallel, it would miss the race and instead of resending just remove the
+                // updates thinking that they have been already sent.
+                conn.execute(
+                    "INSERT INTO smtp_status_updates (msg_id, first_serial, last_serial, descr) \
+                     VALUES(?, ?, ?, '') \
+                     ON CONFLICT(msg_id) \
+                     DO UPDATE SET first_serial=min(first_serial - 1, excluded.first_serial)",
+                    (msg.id, range.0, range.1),
+                )?;
+                Ok(())
+            };
+            context.sql.call_write(conn_fn).await?;
+        }
+        context.scheduler.interrupt_smtp().await;
     }
     Ok(())
 }
@@ -4664,6 +4688,14 @@ impl Context {
             SyncAction::SetContacts(addrs) => set_contacts_by_addrs(self, chat_id, addrs).await,
         }
     }
+
+    /// Emits the appropriate `MsgsChanged` event. Should be called if the number of unnoticed
+    /// archived chats could decrease. In general we don't want to make an extra db query to know if
+    /// a noticied chat is archived. Emitting events should be cheap, a false-positive `MsgsChanged`
+    /// is ok.
+    pub(crate) fn on_archived_chats_maybe_noticed(&self) {
+        self.emit_msgs_changed(DC_CHAT_ID_ARCHIVED_LINK, MsgId::new(0));
+    }
 }
 
 #[cfg(test)]
@@ -5835,7 +5867,27 @@ mod tests {
         assert_eq!(DC_CHAT_ID_ARCHIVED_LINK.get_fresh_msg_cnt(&t).await?, 2);
 
         // mark one of the archived+muted chats as noticed: check that the archive-link counter is changed as well
+        t.evtracker.clear_events();
         marknoticed_chat(&t, claire_chat_id).await?;
+        let ev = t
+            .evtracker
+            .get_matching(|ev| {
+                matches!(
+                    ev,
+                    EventType::MsgsChanged {
+                        chat_id: DC_CHAT_ID_ARCHIVED_LINK,
+                        ..
+                    }
+                )
+            })
+            .await;
+        assert_eq!(
+            ev,
+            EventType::MsgsChanged {
+                chat_id: DC_CHAT_ID_ARCHIVED_LINK,
+                msg_id: MsgId::new(0),
+            }
+        );
         assert_eq!(bob_chat_id.get_fresh_msg_cnt(&t).await?, 2);
         assert_eq!(claire_chat_id.get_fresh_msg_cnt(&t).await?, 0);
         assert_eq!(DC_CHAT_ID_ARCHIVED_LINK.get_fresh_msg_cnt(&t).await?, 1);

src/chatlist.rs

@@ -82,11 +82,13 @@ impl Chatlist {
     ///   not needed when DC_GCL_ARCHIVED_ONLY is already set)
     /// - if the flag DC_GCL_ADD_ALLDONE_HINT is set, DC_CHAT_ID_ALLDONE_HINT
     ///   is added as needed.
+    ///
     /// `query`: An optional query for filtering the list. Only chats matching this query
-    ///     are returned. When `is:unread` is contained in the query, the chatlist is
-    ///     filtered such that only chats with unread messages show up.
+    /// are returned. When `is:unread` is contained in the query, the chatlist is
+    /// filtered such that only chats with unread messages show up.
+    ///
     /// `query_contact_id`: An optional contact ID for filtering the list. Only chats including this contact ID
-    ///     are returned.
+    /// are returned.
     pub async fn try_load(
         context: &Context,
         listflags: usize,

src/config.rs

@@ -13,7 +13,7 @@ use strum_macros::{AsRefStr, Display, EnumIter, EnumString};
 use tokio::fs;
 
 use crate::blob::BlobObject;
-use crate::constants::{self, DC_VERSION_STR};
+use crate::constants;
 use crate::context::Context;
 use crate::events::EventType;
 use crate::log::LogExt;
@@ -59,7 +59,10 @@ pub enum Config {
     /// IMAP server security (e.g. TLS, STARTTLS).
     MailSecurity,
 
-    /// How to check IMAP server TLS certificates.
+    /// How to check TLS certificates.
+    ///
+    /// "IMAP" in the name is for compatibility,
+    /// this actually applies to both IMAP and SMTP connections.
     ImapCertificateChecks,
 
     /// SMTP server hostname.
@@ -77,7 +80,9 @@ pub enum Config {
     /// SMTP server security (e.g. TLS, STARTTLS).
     SendSecurity,
 
-    /// How to check SMTP server TLS certificates.
+    /// Deprecated option for backwards compatibilty.
+    ///
+    /// Certificate checks for SMTP are actually controlled by `imap_certificate_checks` config.
     SmtpCertificateChecks,
 
     /// Whether to use OAuth 2.
@@ -131,7 +136,8 @@ pub enum Config {
     #[strum(props(default = "0"))]
     SentboxWatch,
 
-    /// True if chat messages should be moved to a separate folder.
+    /// True if chat messages should be moved to a separate folder. Auto-sent messages like sync
+    /// ones are moved there anyway.
     #[strum(props(default = "1"))]
     MvboxMove,
 
@@ -209,7 +215,12 @@ pub enum Config {
     /// Configured IMAP server security (e.g. TLS, STARTTLS).
     ConfiguredMailSecurity,
 
-    /// How to check IMAP server TLS certificates.
+    /// Configured TLS certificate checks.
+    /// This option is saved on successful configuration
+    /// and should not be modified manually.
+    ///
+    /// This actually applies to both IMAP and SMTP connections,
+    /// but has "IMAP" in the name for backwards compatibility.
     ConfiguredImapCertificateChecks,
 
     /// Configured SMTP server hostname.
@@ -224,7 +235,9 @@ pub enum Config {
     /// Configured SMTP server port.
     ConfiguredSendPort,
 
-    /// How to check SMTP server TLS certificates.
+    /// Deprecated, stored for backwards compatibility.
+    ///
+    /// ConfiguredImapCertificateChecks is actually used.
     ConfiguredSmtpCertificateChecks,
 
     /// Whether OAuth 2 is used with configured provider.
@@ -257,6 +270,9 @@ pub enum Config {
     /// True if account is a chatmail account.
     IsChatmail,
 
+    /// True if `IsChatmail` mustn't be autoconfigured. For tests.
+    FixIsChatmail,
+
     /// True if account is muted.
     IsMuted,
 
@@ -382,9 +398,6 @@ impl Config {
     /// multiple users are sharing an account. Another example is `Self::SyncMsgs` itself which
     /// mustn't be controlled by other devices.
     pub(crate) fn is_synced(&self) -> bool {
-        // NB: We don't restart IO from the synchronisation code, so `MvboxMove` isn't effective
-        // immediately if `ConfiguredMvboxFolder` is unset, but only after a reconnect (see
-        // `Imap::prepare()`).
         matches!(
             self,
             Self::Displayname
@@ -398,10 +411,7 @@ impl Config {
 
     /// Whether the config option needs an IO scheduler restart to take effect.
     pub(crate) fn needs_io_restart(&self) -> bool {
-        matches!(
-            self,
-            Config::MvboxMove | Config::OnlyFetchMvbox | Config::SentboxWatch
-        )
+        matches!(self, Config::OnlyFetchMvbox | Config::SentboxWatch)
     }
 }
 
@@ -427,7 +437,7 @@ impl Context {
                         .into_owned()
                 })
             }
-            Config::SysVersion => Some((*DC_VERSION_STR).clone()),
+            Config::SysVersion => Some((*constants::DC_VERSION_STR).clone()),
             Config::SysMsgsizeMaxRecommended => Some(format!("{RECOMMENDED_FILE_SIZE}")),
             Config::SysConfigKeys => Some(get_config_keys_string()),
             _ => self.sql.get_raw_config(key.as_ref()).await?,
@@ -485,7 +495,8 @@ impl Context {
     /// Returns true if movebox ("DeltaChat" folder) should be watched.
     pub(crate) async fn should_watch_mvbox(&self) -> Result<bool> {
         Ok(self.get_config_bool(Config::MvboxMove).await?
-            || self.get_config_bool(Config::OnlyFetchMvbox).await?)
+            || self.get_config_bool(Config::OnlyFetchMvbox).await?
+            || !self.get_config_bool(Config::IsChatmail).await?)
     }
 
     /// Returns true if sentbox ("Sent" folder) should be watched.
@@ -504,6 +515,19 @@ impl Context {
             && !self.get_config_bool(Config::Bot).await?)
     }
 
+    /// Returns whether MDNs should be requested.
+    pub(crate) async fn should_request_mdns(&self) -> Result<bool> {
+        match self.config_exists(Config::MdnsEnabled).await? {
+            true => self.get_config_bool(Config::MdnsEnabled).await,
+            false => Ok(!self.get_config_bool(Config::Bot).await?),
+        }
+    }
+
+    /// Returns whether MDNs should be sent.
+    pub(crate) async fn should_send_mdns(&self) -> Result<bool> {
+        self.get_config_bool(Config::MdnsEnabled).await
+    }
+
     /// Gets configured "delete_server_after" value.
     ///
     /// `None` means never delete the message, `Some(0)` means delete
@@ -688,7 +712,7 @@ impl Context {
         {
             return Ok(());
         }
-        Box::pin(self.send_sync_msg()).await.log_err(self).ok();
+        self.scheduler.interrupt_smtp().await;
         Ok(())
     }
 
@@ -953,6 +977,21 @@ mod tests {
         Ok(())
     }
 
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_mdns_default_behaviour() -> Result<()> {
+        let t = &TestContext::new_alice().await;
+        assert!(t.should_request_mdns().await?);
+        assert!(t.should_send_mdns().await?);
+        // The setting should be displayed correctly.
+        assert!(t.get_config_bool(Config::MdnsEnabled).await?);
+
+        t.set_config_bool(Config::Bot, true).await?;
+        assert!(!t.should_request_mdns().await?);
+        assert!(t.should_send_mdns().await?);
+        assert!(t.get_config_bool(Config::MdnsEnabled).await?);
+        Ok(())
+    }
+
     #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
     async fn test_sync() -> Result<()> {
         let alice0 = TestContext::new_alice().await;
@@ -979,7 +1018,6 @@ mod tests {
         // Reset to default. Test that it's not synced because defaults may differ across client
         // versions.
         alice0.set_config(Config::MdnsEnabled, None).await?;
-        assert_eq!(alice0.get_config_bool(Config::MdnsEnabled).await?, true);
         alice0.set_config_bool(Config::MdnsEnabled, false).await?;
         sync(&alice0, &alice1).await;
         assert_eq!(alice1.get_config_bool(Config::MdnsEnabled).await?, false);
@@ -1054,7 +1092,8 @@ mod tests {
 
         let status = "Synced via usual message";
         alice0.set_config(Config::Selfstatus, Some(status)).await?;
-        alice0.pop_sent_msg().await; // Sync message
+        alice0.send_sync_msg().await?;
+        alice0.pop_sent_msg().await;
         let status1 = "Synced via sync message";
         alice1.set_config(Config::Selfstatus, Some(status1)).await?;
         tcm.send_recv(alice0, alice1, "hi Alice!").await;
@@ -1077,7 +1116,8 @@ mod tests {
         alice0
             .set_config(Config::Selfavatar, Some(file.to_str().unwrap()))
             .await?;
-        alice0.pop_sent_msg().await; // Sync message
+        alice0.send_sync_msg().await?;
+        alice0.pop_sent_msg().await;
         let file = alice1.dir.path().join("avatar.jpg");
         let bytes = include_bytes!("../test-data/image/avatar1000x1000.jpg");
         tokio::fs::write(&file, bytes).await?;

src/configure.rs

@@ -113,10 +113,6 @@ impl Context {
         let mut param = LoginParam::load_candidate_params(self).await?;
         let old_addr = self.get_config(Config::ConfiguredAddr).await?;
 
-        // Reset our knowledge about whether the server is a chatmail server.
-        // We will update it when we connect to IMAP.
-        self.set_config_internal(Config::IsChatmail, None).await?;
-
         let success = configure(self, &mut param).await;
         self.set_config_internal(Config::NotifyAboutWrongPw, None)
             .await?;
@@ -193,10 +189,8 @@ async fn configure(ctx: &Context, param: &mut LoginParam) -> Result<()> {
 
     // Step 1: Load the parameters and check email-address and password
 
-    // Do oauth2 only if socks5 is disabled. As soon as we have a http library that can do
-    // socks5 requests, this can work with socks5 too.  OAuth is always set either for both
-    // IMAP and SMTP or not at all.
-    if param.imap.oauth2 && !socks5_enabled {
+    // OAuth is always set either for both IMAP and SMTP or not at all.
+    if param.imap.oauth2 {
         // the used oauth2 addr may differ, check this.
         // if get_oauth2_addr() is not available in the oauth2 implementation, just use the given one.
         progress!(ctx, 10);
@@ -216,7 +210,6 @@ async fn configure(ctx: &Context, param: &mut LoginParam) -> Result<()> {
 
     let parsed = EmailAddress::new(&param.addr).context("Bad email-address")?;
     let param_domain = parsed.domain;
-    let param_addr_urlencoded = utf8_percent_encode(&param.addr, NON_ALPHANUMERIC).to_string();
 
     // Step 2: Autoconfig
     progress!(ctx, 200);
@@ -267,7 +260,6 @@ async fn configure(ctx: &Context, param: &mut LoginParam) -> Result<()> {
                                         }
                                     }
                                 },
-                                strict_tls: Some(provider.opt.strict_tls),
                             })
                             .collect();
 
@@ -282,19 +274,28 @@ async fn configure(ctx: &Context, param: &mut LoginParam) -> Result<()> {
         } else {
             // Try receiving autoconfig
             info!(ctx, "no offline autoconfig found");
-            param_autoconfig = if socks5_enabled {
-                // Currently we can't do http requests through socks5, to not leak
-                // the ip, just don't do online autoconfig
-                info!(ctx, "socks5 enabled, skipping autoconfig");
-                None
-            } else {
-                get_autoconfig(ctx, param, &param_domain, &param_addr_urlencoded).await
-            }
+            param_autoconfig = get_autoconfig(ctx, param, &param_domain).await;
         }
     } else {
         param_autoconfig = None;
     }
 
+    let user_strict_tls = match param.certificate_checks {
+        CertificateChecks::Automatic => None,
+        CertificateChecks::Strict => Some(true),
+        CertificateChecks::AcceptInvalidCertificates
+        | CertificateChecks::AcceptInvalidCertificates2 => Some(false),
+    };
+    let provider_strict_tls = param.provider.map(|provider| provider.opt.strict_tls);
+    let strict_tls = user_strict_tls.or(provider_strict_tls).unwrap_or(true);
+
+    // Do not save `CertificateChecks::Automatic` into `configured_imap_certificate_checks`.
+    param.certificate_checks = if strict_tls {
+        CertificateChecks::Strict
+    } else {
+        CertificateChecks::AcceptInvalidCertificates
+    };
+
     progress!(ctx, 500);
 
     let mut servers = param_autoconfig.unwrap_or_default();
@@ -308,7 +309,6 @@ async fn configure(ctx: &Context, param: &mut LoginParam) -> Result<()> {
             port: param.imap.port,
             socket: param.imap.security,
             username: param.imap.user.clone(),
-            strict_tls: None,
         })
     }
     if !servers
@@ -321,24 +321,9 @@ async fn configure(ctx: &Context, param: &mut LoginParam) -> Result<()> {
             port: param.smtp.port,
             socket: param.smtp.security,
             username: param.smtp.user.clone(),
-            strict_tls: None,
         })
     }
 
-    // respect certificate setting from function parameters
-    for server in &mut servers {
-        let certificate_checks = match server.protocol {
-            Protocol::Imap => param.imap.certificate_checks,
-            Protocol::Smtp => param.smtp.certificate_checks,
-        };
-        server.strict_tls = match certificate_checks {
-            CertificateChecks::AcceptInvalidCertificates
-            | CertificateChecks::AcceptInvalidCertificates2 => Some(false),
-            CertificateChecks::Strict => Some(true),
-            CertificateChecks::Automatic => server.strict_tls,
-        };
-    }
-
     let servers = expand_param_vector(servers, &param.addr, &param_domain);
 
     progress!(ctx, 550);
@@ -354,9 +339,6 @@ async fn configure(ctx: &Context, param: &mut LoginParam) -> Result<()> {
         .filter(|params| params.protocol == Protocol::Smtp)
         .cloned()
         .collect();
-    let provider_strict_tls = param
-        .provider
-        .map_or(socks5_config.is_some(), |provider| provider.opt.strict_tls);
 
     let smtp_config_task = task::spawn(async move {
         let mut smtp_configured = false;
@@ -366,18 +348,13 @@ async fn configure(ctx: &Context, param: &mut LoginParam) -> Result<()> {
             smtp_param.server.clone_from(&smtp_server.hostname);
             smtp_param.port = smtp_server.port;
             smtp_param.security = smtp_server.socket;
-            smtp_param.certificate_checks = match smtp_server.strict_tls {
-                Some(true) => CertificateChecks::Strict,
-                Some(false) => CertificateChecks::AcceptInvalidCertificates,
-                None => CertificateChecks::Automatic,
-            };
 
             match try_smtp_one_param(
                 &context_smtp,
                 &smtp_param,
                 &socks5_config,
                 &smtp_addr,
-                provider_strict_tls,
+                strict_tls,
                 &mut smtp,
             )
             .await
@@ -413,18 +390,13 @@ async fn configure(ctx: &Context, param: &mut LoginParam) -> Result<()> {
         param.imap.server.clone_from(&imap_server.hostname);
         param.imap.port = imap_server.port;
         param.imap.security = imap_server.socket;
-        param.imap.certificate_checks = match imap_server.strict_tls {
-            Some(true) => CertificateChecks::Strict,
-            Some(false) => CertificateChecks::AcceptInvalidCertificates,
-            None => CertificateChecks::Automatic,
-        };
 
         match try_imap_one_param(
             ctx,
             &param.imap,
             &param.socks5_config,
             &param.addr,
-            provider_strict_tls,
+            strict_tls,
         )
         .await
         {
@@ -458,8 +430,22 @@ async fn configure(ctx: &Context, param: &mut LoginParam) -> Result<()> {
 
     progress!(ctx, 900);
 
-    if imap_session.is_chatmail() {
-        ctx.set_config(Config::IsChatmail, Some("1")).await?;
+    let is_chatmail = match ctx.get_config_bool(Config::FixIsChatmail).await? {
+        false => {
+            let is_chatmail = imap_session.is_chatmail();
+            ctx.set_config(
+                Config::IsChatmail,
+                Some(match is_chatmail {
+                    false => "0",
+                    true => "1",
+                }),
+            )
+            .await?;
+            is_chatmail
+        }
+        true => ctx.get_config_bool(Config::IsChatmail).await?,
+    };
+    if is_chatmail {
         ctx.set_config(Config::SentboxWatch, None).await?;
         ctx.set_config(Config::MvboxMove, Some("0")).await?;
         ctx.set_config(Config::OnlyFetchMvbox, None).await?;
@@ -467,8 +453,7 @@ async fn configure(ctx: &Context, param: &mut LoginParam) -> Result<()> {
         ctx.set_config(Config::E2eeEnabled, Some("1")).await?;
     }
 
-    let create_mvbox = ctx.should_watch_mvbox().await?;
-
+    let create_mvbox = !is_chatmail;
     imap.configure_folders(ctx, &mut imap_session, create_mvbox)
         .await?;
 
@@ -519,14 +504,15 @@ async fn get_autoconfig(
     ctx: &Context,
     param: &LoginParam,
     param_domain: &str,
-    param_addr_urlencoded: &str,
 ) -> Option<Vec<ServerParams>> {
+    let param_addr_urlencoded = utf8_percent_encode(&param.addr, NON_ALPHANUMERIC).to_string();
+
     if let Ok(res) = moz_autoconfigure(
         ctx,
         &format!(
             "https://autoconfig.{param_domain}/mail/config-v1.1.xml?emailaddress={param_addr_urlencoded}"
         ),
-        param,
+        &param.addr,
     )
     .await
     {
@@ -541,7 +527,7 @@ async fn get_autoconfig(
             "https://{}/.well-known/autoconfig/mail/config-v1.1.xml?emailaddress={}",
             &param_domain, &param_addr_urlencoded
         ),
-        param,
+        &param.addr,
     )
     .await
     {
@@ -577,7 +563,7 @@ async fn get_autoconfig(
     if let Ok(res) = moz_autoconfigure(
         ctx,
         &format!("https://autoconfig.thunderbird.net/v1.1/{}", &param_domain),
-        param,
+        &param.addr,
     )
     .await
     {
@@ -592,15 +578,15 @@ async fn try_imap_one_param(
     param: &ServerLoginParam,
     socks5_config: &Option<Socks5Config>,
     addr: &str,
-    provider_strict_tls: bool,
+    strict_tls: bool,
 ) -> Result<(Imap, ImapSession), ConfigurationError> {
     let inf = format!(
-        "imap: {}@{}:{} security={} certificate_checks={} oauth2={} socks5_config={}",
+        "imap: {}@{}:{} security={} strict_tls={} oauth2={} socks5_config={}",
         param.user,
         param.server,
         param.port,
         param.security,
-        param.certificate_checks,
+        strict_tls,
         param.oauth2,
         if let Some(socks5_config) = socks5_config {
             socks5_config.to_string()
@@ -612,7 +598,7 @@ async fn try_imap_one_param(
 
     let (_s, r) = async_channel::bounded(1);
 
-    let mut imap = match Imap::new(param, socks5_config.clone(), addr, provider_strict_tls, r) {
+    let mut imap = match Imap::new(param, socks5_config.clone(), addr, strict_tls, r) {
         Err(err) => {
             info!(context, "failure: {:#}", err);
             return Err(ConfigurationError {
@@ -643,16 +629,16 @@ async fn try_smtp_one_param(
     param: &ServerLoginParam,
     socks5_config: &Option<Socks5Config>,
     addr: &str,
-    provider_strict_tls: bool,
+    strict_tls: bool,
     smtp: &mut Smtp,
 ) -> Result<(), ConfigurationError> {
     let inf = format!(
-        "smtp: {}@{}:{} security={} certificate_checks={} oauth2={} socks5_config={}",
+        "smtp: {}@{}:{} security={} strict_tls={} oauth2={} socks5_config={}",
         param.user,
         param.server,
         param.port,
         param.security,
-        param.certificate_checks,
+        strict_tls,
         param.oauth2,
         if let Some(socks5_config) = socks5_config {
             socks5_config.to_string()
@@ -663,7 +649,7 @@ async fn try_smtp_one_param(
     info!(context, "Trying: {}", inf);
 
     if let Err(err) = smtp
-        .connect(context, param, socks5_config, addr, provider_strict_tls)
+        .connect(context, param, socks5_config, addr, strict_tls)
         .await
     {
         info!(context, "SMTP failure: {err:#}.");

src/configure/auto_mozilla.rs

@@ -9,7 +9,6 @@ use quick_xml::events::{BytesStart, Event};
 
 use super::{Error, ServerParams};
 use crate::context::Context;
-use crate::login_param::LoginParam;
 use crate::net::read_url;
 use crate::provider::{Protocol, Socket};
 
@@ -248,7 +247,6 @@ fn parse_serverparams(in_emailaddr: &str, xml_raw: &str) -> Result<Vec<ServerPar
                 hostname: server.hostname,
                 port: server.port,
                 username: server.username,
-                strict_tls: None,
             })
         })
         .collect();
@@ -258,11 +256,11 @@ fn parse_serverparams(in_emailaddr: &str, xml_raw: &str) -> Result<Vec<ServerPar
 pub(crate) async fn moz_autoconfigure(
     context: &Context,
     url: &str,
-    param_in: &LoginParam,
+    addr: &str,
 ) -> Result<Vec<ServerParams>, Error> {
     let xml_raw = read_url(context, url).await?;
 
-    let res = parse_serverparams(&param_in.addr, &xml_raw);
+    let res = parse_serverparams(addr, &xml_raw);
     if let Err(err) = &res {
         warn!(
             context,

src/configure/auto_outlook.rs

@@ -187,7 +187,6 @@ fn protocols_to_serverparams(protocols: Vec<ProtocolTag>) -> Vec<ServerParams> {
                 hostname: protocol.server,
                 port: protocol.port,
                 username: String::new(),
-                strict_tls: None,
             })
         })
         .collect()

src/configure/server_params.rs

@@ -22,31 +22,18 @@ pub(crate) struct ServerParams {
 
     /// Username, empty if unknown.
     pub username: String,
-
-    /// Whether TLS certificates should be strictly checked or not, `None` for automatic.
-    pub strict_tls: Option<bool>,
 }
 
 impl ServerParams {
     fn expand_usernames(self, addr: &str) -> Vec<ServerParams> {
-        let mut res = Vec::new();
-
         if self.username.is_empty() {
-            res.push(Self {
+            vec![Self {
                 username: addr.to_string(),
                 ..self.clone()
-            });
-
-            if let Some(at) = addr.find('@') {
-                res.push(Self {
-                    username: addr.split_at(at).0.to_string(),
-                    ..self
-                });
-            }
+            }]
         } else {
-            res.push(self)
+            vec![self]
         }
-        res
     }
 
     fn expand_hostnames(self, param_domain: &str) -> Vec<ServerParams> {
@@ -135,14 +122,6 @@ impl ServerParams {
             vec![self]
         }
     }
-
-    fn expand_strict_tls(self) -> Vec<ServerParams> {
-        vec![Self {
-            // Strict if not set by the user or provider database.
-            strict_tls: Some(self.strict_tls.unwrap_or(true)),
-            ..self
-        }]
-    }
 }
 
 /// Expands vector of `ServerParams`, replacing placeholders with
@@ -155,9 +134,7 @@ pub(crate) fn expand_param_vector(
     v.into_iter()
         // The order of expansion is important.
         //
-        // Ports are expanded the last, so they are changed the first.  Username is only changed if
-        // default value (address with domain) didn't work for all available hosts and ports.
-        .flat_map(|params| params.expand_strict_tls().into_iter())
+        // Ports are expanded the last, so they are changed the first.
         .flat_map(|params| params.expand_usernames(addr).into_iter())
         .flat_map(|params| params.expand_hostnames(domain).into_iter())
         .flat_map(|params| params.expand_ports().into_iter())
@@ -177,7 +154,6 @@ mod tests {
                 port: 0,
                 socket: Socket::Ssl,
                 username: "foobar".to_string(),
-                strict_tls: Some(true),
             }],
             "foobar@example.net",
             "example.net",
@@ -191,7 +167,6 @@ mod tests {
                 port: 993,
                 socket: Socket::Ssl,
                 username: "foobar".to_string(),
-                strict_tls: Some(true)
             }],
         );
 
@@ -202,7 +177,6 @@ mod tests {
                 port: 123,
                 socket: Socket::Automatic,
                 username: "foobar".to_string(),
-                strict_tls: None,
             }],
             "foobar@example.net",
             "example.net",
@@ -217,7 +191,6 @@ mod tests {
                     port: 123,
                     socket: Socket::Ssl,
                     username: "foobar".to_string(),
-                    strict_tls: Some(true),
                 },
                 ServerParams {
                     protocol: Protocol::Smtp,
@@ -225,12 +198,10 @@ mod tests {
                     port: 123,
                     socket: Socket::Starttls,
                     username: "foobar".to_string(),
-                    strict_tls: Some(true)
                 },
             ],
         );
 
-        // Test that strict_tls is not expanded for plaintext connections.
         let v = expand_param_vector(
             vec![ServerParams {
                 protocol: Protocol::Smtp,
@@ -238,7 +209,6 @@ mod tests {
                 port: 123,
                 socket: Socket::Plain,
                 username: "foobar".to_string(),
-                strict_tls: Some(true),
             }],
             "foobar@example.net",
             "example.net",
@@ -251,7 +221,6 @@ mod tests {
                 port: 123,
                 socket: Socket::Plain,
                 username: "foobar".to_string(),
-                strict_tls: Some(true)
             }],
         );
 
@@ -263,7 +232,6 @@ mod tests {
                 port: 10480,
                 socket: Socket::Ssl,
                 username: "foobar".to_string(),
-                strict_tls: Some(true),
             }],
             "foobar@example.net",
             "example.net",
@@ -277,7 +245,6 @@ mod tests {
                     port: 10480,
                     socket: Socket::Ssl,
                     username: "foobar".to_string(),
-                    strict_tls: Some(true)
                 },
                 ServerParams {
                     protocol: Protocol::Imap,
@@ -285,7 +252,6 @@ mod tests {
                     port: 10480,
                     socket: Socket::Ssl,
                     username: "foobar".to_string(),
-                    strict_tls: Some(true)
                 },
                 ServerParams {
                     protocol: Protocol::Imap,
@@ -293,7 +259,6 @@ mod tests {
                     port: 10480,
                     socket: Socket::Ssl,
                     username: "foobar".to_string(),
-                    strict_tls: Some(true)
                 }
             ],
         );
@@ -307,7 +272,6 @@ mod tests {
                 port: 0,
                 socket: Socket::Automatic,
                 username: "foobar".to_string(),
-                strict_tls: Some(true),
             }],
             "foobar@example.net",
             "example.net",
@@ -321,7 +285,6 @@ mod tests {
                     port: 465,
                     socket: Socket::Ssl,
                     username: "foobar".to_string(),
-                    strict_tls: Some(true)
                 },
                 ServerParams {
                     protocol: Protocol::Smtp,
@@ -329,7 +292,45 @@ mod tests {
                     port: 587,
                     socket: Socket::Starttls,
                     username: "foobar".to_string(),
-                    strict_tls: Some(true)
+                },
+            ],
+        );
+
+        // Test that email address is used as the default username.
+        // We do not try other usernames
+        // such as the local part of the address
+        // as this is very uncommon configuration
+        // and not worth doubling the number of candidates to try.
+        // If such configuration is used, email provider
+        // should provide XML autoconfig or
+        // be added to the provider database as an exception.
+        let v = expand_param_vector(
+            vec![ServerParams {
+                protocol: Protocol::Imap,
+                hostname: "example.net".to_string(),
+                port: 0,
+                socket: Socket::Automatic,
+                username: "".to_string(),
+            }],
+            "foobar@example.net",
+            "example.net",
+        );
+        assert_eq!(
+            v,
+            vec![
+                ServerParams {
+                    protocol: Protocol::Imap,
+                    hostname: "example.net".to_string(),
+                    port: 993,
+                    socket: Socket::Ssl,
+                    username: "foobar@example.net".to_string(),
+                },
+                ServerParams {
+                    protocol: Protocol::Imap,
+                    hostname: "example.net".to_string(),
+                    port: 143,
+                    socket: Socket::Starttls,
+                    username: "foobar@example.net".to_string(),
                 },
             ],
         );

src/constants.rs

@@ -209,7 +209,7 @@ pub const WORSE_IMAGE_SIZE: u32 = 640;
 // Key for the folder configuration version (see below).
 pub(crate) const DC_FOLDERS_CONFIGURED_KEY: &str = "folders_configured";
 // this value can be increased if the folder configuration is changed and must be redone on next program start
-pub(crate) const DC_FOLDERS_CONFIGURED_VERSION: i32 = 4;
+pub(crate) const DC_FOLDERS_CONFIGURED_VERSION: i32 = 5;
 
 // If more recipients are needed in SMTP's `RCPT TO:` header, the recipient list is split into
 // chunks. This does not affect MIME's `To:` header. Can be overwritten by setting

src/contact.rs

@@ -642,7 +642,7 @@ impl Contact {
             set_blocked(context, Nosync, contact_id, false).await?;
         }
 
-        if sync.into() {
+        if sync.into() && sth_modified != Modifier::None {
             chat::sync(
                 context,
                 chat::SyncId::ContactAddr(addr.to_string()),
@@ -747,7 +747,7 @@ impl Contact {
     /// - "name": name passed as function argument, belonging to the given origin
     /// - "row_name": current name used in the database, typically set to "name"
     /// - "row_authname": name as authorized from a contact, set only through a From-header
-    /// Depending on the origin, both, "row_name" and "row_authname" are updated from "name".
+    ///   Depending on the origin, both, "row_name" and "row_authname" are updated from "name".
     ///
     /// Returns the contact_id and a `Modifier` value indicating if a modification occurred.
     pub(crate) async fn add_or_lookup(
@@ -997,7 +997,7 @@ impl Contact {
     /// - if the flag DC_GCL_ADD_SELF is set, SELF is added to the list unless filtered by other parameters
     /// - if the flag DC_GCL_VERIFIED_ONLY is set, only verified contacts are returned.
     ///   if DC_GCL_VERIFIED_ONLY is not set, verified and unverified contacts are returned.
-    /// `query` is a string to filter the list.
+    ///   `query` is a string to filter the list.
     pub async fn get_all(
         context: &Context,
         listflags: u32,
@@ -1402,6 +1402,17 @@ impl Contact {
         self.status.as_str()
     }
 
+    /// Returns whether end-to-end encryption to the contact is available.
+    pub async fn e2ee_avail(&self, context: &Context) -> Result<bool> {
+        if self.id == ContactId::SELF {
+            return Ok(true);
+        }
+        let Some(peerstate) = Peerstate::from_addr(context, &self.addr).await? else {
+            return Ok(false);
+        };
+        Ok(peerstate.peek_key(false).is_some())
+    }
+
     /// Returns true if the contact
     /// can be added to verified chats,
     /// i.e. has a verified key
@@ -1913,8 +1924,13 @@ impl RecentlySeenLoop {
             .unwrap();
     }
 
-    pub(crate) fn abort(self) {
+    pub(crate) async fn abort(self) {
         self.handle.abort();
+
+        // Await aborted task to ensure the `Future` is dropped
+        // with all resources moved inside such as the `Context`
+        // reference to `InnerContext`.
+        self.handle.await.ok();
     }
 }
 
@@ -2668,6 +2684,8 @@ mod tests {
 
         let encrinfo = Contact::get_encrinfo(&alice, contact_bob_id).await?;
         assert_eq!(encrinfo, "No encryption");
+        let contact = Contact::get_by_id(&alice, contact_bob_id).await?;
+        assert!(!contact.e2ee_avail(&alice).await?);
 
         let bob = TestContext::new_bob().await;
         let chat_alice = bob
@@ -2691,6 +2709,8 @@ bob@example.net:
 CCCB 5AA9 F6E1 141C 9431
 65F1 DB18 B18C BCF7 0487"
         );
+        let contact = Contact::get_by_id(&alice, contact_bob_id).await?;
+        assert!(contact.e2ee_avail(&alice).await?);
         Ok(())
     }
 

src/context.rs

@@ -814,6 +814,12 @@ impl Context {
         }
 
         res.insert("is_chatmail", self.is_chatmail().await?.to_string());
+        res.insert(
+            "fix_is_chatmail",
+            self.get_config_bool(Config::FixIsChatmail)
+                .await?
+                .to_string(),
+        );
         res.insert(
             "is_muted",
             self.get_config_bool(Config::IsMuted).await?.to_string(),

src/headerdef.rs

@@ -11,6 +11,7 @@ pub enum HeaderDef {
     Date,
     From_,
     To,
+    AutoSubmitted,
 
     /// Carbon copy.
     Cc,

src/imap.rs

@@ -32,11 +32,10 @@ use crate::contact::{Contact, ContactId, Modifier, Origin};
 use crate::context::Context;
 use crate::events::EventType;
 use crate::headerdef::{HeaderDef, HeaderDefMap};
-use crate::login_param::{CertificateChecks, LoginParam, ServerLoginParam};
+use crate::login_param::{LoginParam, ServerLoginParam};
 use crate::message::{self, Message, MessageState, MessengerMessage, MsgId, Viewtype};
 use crate::mimeparser;
 use crate::oauth2::get_oauth2_access_token;
-use crate::provider::Socket;
 use crate::receive_imf::{
     from_field_to_contact_id, get_prefetch_parent_message, receive_imf_inner, ReceivedMsg,
 };
@@ -232,20 +231,13 @@ impl Imap {
         lp: &ServerLoginParam,
         socks5_config: Option<Socks5Config>,
         addr: &str,
-        provider_strict_tls: bool,
+        strict_tls: bool,
         idle_interrupt_receiver: Receiver<()>,
     ) -> Result<Self> {
         if lp.server.is_empty() || lp.user.is_empty() || lp.password.is_empty() {
             bail!("Incomplete IMAP connection parameters");
         }
 
-        let strict_tls = match lp.certificate_checks {
-            CertificateChecks::Automatic => provider_strict_tls,
-            CertificateChecks::Strict => true,
-            CertificateChecks::AcceptInvalidCertificates
-            | CertificateChecks::AcceptInvalidCertificates2 => false,
-        };
-
         let imap = Imap {
             idle_interrupt_receiver,
             addr: addr.to_string(),
@@ -273,17 +265,11 @@ impl Imap {
         }
 
         let param = LoginParam::load_configured_params(context).await?;
-        // the trailing underscore is correct
-
         let imap = Self::new(
             &param.imap,
             param.socks5_config.clone(),
             &param.addr,
-            param
-                .provider
-                .map_or(param.socks5_config.is_some(), |provider| {
-                    provider.opt.strict_tls
-                }),
+            param.strict_tls(),
             idle_interrupt_receiver,
         )?;
         Ok(imap)
@@ -342,52 +328,16 @@ impl Imap {
         );
         self.conn_backoff_ms = max(BACKOFF_MIN_MS, self.conn_backoff_ms);
 
-        let connection_res: Result<Client> =
-            if self.lp.security == Socket::Starttls || self.lp.security == Socket::Plain {
-                let imap_server: &str = self.lp.server.as_ref();
-                let imap_port = self.lp.port;
+        let connection_res = Client::connect(
+            context,
+            self.lp.server.as_ref(),
+            self.lp.port,
+            self.strict_tls,
+            self.socks5_config.clone(),
+            self.lp.security,
+        )
+        .await;
 
-                if let Some(socks5_config) = &self.socks5_config {
-                    if self.lp.security == Socket::Starttls {
-                        Client::connect_starttls_socks5(
-                            context,
-                            imap_server,
-                            imap_port,
-                            socks5_config.clone(),
-                            self.strict_tls,
-                        )
-                        .await
-                    } else {
-                        Client::connect_insecure_socks5(
-                            context,
-                            imap_server,
-                            imap_port,
-                            socks5_config.clone(),
-                        )
-                        .await
-                    }
-                } else if self.lp.security == Socket::Starttls {
-                    Client::connect_starttls(context, imap_server, imap_port, self.strict_tls).await
-                } else {
-                    Client::connect_insecure(context, imap_server, imap_port).await
-                }
-            } else {
-                let imap_server: &str = self.lp.server.as_ref();
-                let imap_port = self.lp.port;
-
-                if let Some(socks5_config) = &self.socks5_config {
-                    Client::connect_secure_socks5(
-                        context,
-                        imap_server,
-                        imap_port,
-                        self.strict_tls,
-                        socks5_config.clone(),
-                    )
-                    .await
-                } else {
-                    Client::connect_secure(context, imap_server, imap_port, self.strict_tls).await
-                }
-            };
         let client = connection_res?;
         self.conn_backoff_ms = BACKOFF_MIN_MS;
         self.ratelimit.send();
@@ -483,7 +433,11 @@ impl Imap {
             .get_raw_config_int(constants::DC_FOLDERS_CONFIGURED_KEY)
             .await?;
         if folders_configured.unwrap_or_default() < constants::DC_FOLDERS_CONFIGURED_VERSION {
-            let create_mvbox = true;
+            let is_chatmail = match context.get_config_bool(Config::FixIsChatmail).await? {
+                false => session.is_chatmail(),
+                true => context.get_config_bool(Config::IsChatmail).await?,
+            };
+            let create_mvbox = !is_chatmail || context.get_config_bool(Config::MvboxMove).await?;
             self.configure_folders(context, &mut session, create_mvbox)
                 .await?;
         }
@@ -1091,18 +1045,12 @@ impl Session {
             .await?;
 
         for (folder, rowid_set, uid_set) in UidGrouper::from(rows) {
-            self.select_with_uidvalidity(context, &folder)
-                .await
-                .context("failed to select folder")?;
-
-            if let Err(err) = self.add_flag_finalized_with_set(&uid_set, "\\Seen").await {
+            if let Err(err) = self.select_with_uidvalidity(context, &folder).await {
+                warn!(context, "store_seen_flags_on_imap: Failed to select {folder}, will retry later: {err:#}.");
+            } else if let Err(err) = self.add_flag_finalized_with_set(&uid_set, "\\Seen").await {
                 warn!(
                     context,
-                    "Cannot mark messages {} in folder {} as seen, will retry later: {}.",
-                    uid_set,
-                    folder,
-                    err
-                );
+                    "Cannot mark messages {uid_set} in {folder} as seen, will retry later: {err:#}.");
             } else {
                 info!(
                     context,
@@ -1201,6 +1149,9 @@ impl Session {
         set_modseq(context, folder, highest_modseq)
             .await
             .with_context(|| format!("failed to set MODSEQ for folder {folder}"))?;
+        if !updated_chat_ids.is_empty() {
+            context.on_archived_chats_maybe_noticed();
+        }
         for updated_chat_id in updated_chat_ids {
             context.emit_event(EventType::MsgsNoticed(updated_chat_id));
             chatlist_events::emit_chatlist_item_changed(context, updated_chat_id);
@@ -1523,7 +1474,7 @@ impl Session {
         } else if !context.push_subscriber.heartbeat_subscribed().await {
             let context = context.clone();
             // Subscribe for heartbeat notifications.
-            tokio::spawn(async move { context.push_subscriber.subscribe().await });
+            tokio::spawn(async move { context.push_subscriber.subscribe(&context).await });
         }
 
         Ok(())
@@ -1553,8 +1504,8 @@ impl Session {
 
     /// Attempts to configure mvbox.
     ///
-    /// Tries to find any folder in the given list of `folders`. If none is found, tries to create
-    /// `folders[0]`. This method does not use LIST command to ensure that
+    /// Tries to find any folder examining `folders` in the order they go. If none is found, tries
+    /// to create any folder in the same order. This method does not use LIST command to ensure that
     /// configuration works even if mailbox lookup is forbidden via Access Control List (see
     /// <https://datatracker.ietf.org/doc/html/rfc4314>).
     ///
@@ -1588,16 +1539,17 @@ impl Session {
         if !create_mvbox {
             return Ok(None);
         }
-        let Some(folder) = folders.first() else {
-            return Ok(None);
-        };
-        match self.select_with_uidvalidity(context, folder).await {
-            Ok(_) => {
-                info!(context, "MVBOX-folder {} created.", folder);
-                return Ok(Some(folder));
-            }
-            Err(err) => {
-                warn!(context, "Cannot create MVBOX-folder {:?}: {}", folder, err);
+        // Some servers require namespace-style folder names like "INBOX.DeltaChat", so we try all
+        // the variants here.
+        for folder in folders {
+            match self.select_with_uidvalidity(context, folder).await {
+                Ok(_) => {
+                    info!(context, "MVBOX-folder {} created.", folder);
+                    return Ok(Some(folder));
+                }
+                Err(err) => {
+                    warn!(context, "Cannot create MVBOX-folder {:?}: {}", folder, err);
+                }
             }
         }
         Ok(None)
@@ -1845,6 +1797,20 @@ async fn needs_move_to_mvbox(
     context: &Context,
     headers: &[mailparse::MailHeader<'_>],
 ) -> Result<bool> {
+    let has_chat_version = headers.get_header_value(HeaderDef::ChatVersion).is_some();
+    if !context.get_config_bool(Config::IsChatmail).await?
+        && has_chat_version
+        && headers
+            .get_header_value(HeaderDef::AutoSubmitted)
+            .filter(|val| val.to_ascii_lowercase() == "auto-generated")
+            .is_some()
+    {
+        if let Some(from) = mimeparser::get_from(headers) {
+            if context.is_self_addr(&from.addr).await? {
+                return Ok(true);
+            }
+        }
+    }
     if !context.get_config_bool(Config::MvboxMove).await? {
         return Ok(false);
     }
@@ -1858,7 +1824,7 @@ async fn needs_move_to_mvbox(
         return Ok(false);
     }
 
-    if headers.get_header_value(HeaderDef::ChatVersion).is_some() {
+    if has_chat_version {
         Ok(true)
     } else if let Some(parent) = get_prefetch_parent_message(context, headers).await? {
         match parent.is_dc_message {

src/imap/client.rs

@@ -1,24 +1,23 @@
-use std::{
-    ops::{Deref, DerefMut},
-    time::Duration,
-};
+use std::net::SocketAddr;
+use std::ops::{Deref, DerefMut};
 
-use anyhow::{Context as _, Result};
+use anyhow::{bail, format_err, Context as _, Result};
 use async_imap::Client as ImapClient;
 use async_imap::Session as ImapSession;
+use fast_socks5::client::Socks5Stream;
 use tokio::io::BufWriter;
 
 use super::capabilities::Capabilities;
 use super::session::Session;
 use crate::context::Context;
-use crate::net::connect_tcp;
+use crate::net::dns::{lookup_host_with_cache, update_connect_timestamp};
 use crate::net::session::SessionStream;
 use crate::net::tls::wrap_tls;
+use crate::net::update_connection_history;
+use crate::net::{connect_tcp_inner, connect_tls_inner};
+use crate::provider::Socket;
 use crate::socks::Socks5Config;
-use fast_socks5::client::Socks5Stream;
-
-/// IMAP connection, write and read timeout.
-pub(crate) const IMAP_TIMEOUT: Duration = Duration::from_secs(60);
+use crate::tools::time;
 
 #[derive(Debug)]
 pub(crate) struct Client {
@@ -39,6 +38,16 @@ impl DerefMut for Client {
     }
 }
 
+/// Converts port number to ALPN list.
+fn alpn(port: u16) -> &'static [&'static str] {
+    if port == 993 {
+        // Do not request ALPN on standard port.
+        &[]
+    } else {
+        &["imap"]
+    }
+}
+
 /// Determine server capabilities.
 ///
 /// If server supports ID capability, send our client ID.
@@ -98,14 +107,67 @@ impl Client {
         Ok(Session::new(session, capabilities))
     }
 
-    pub async fn connect_secure(
+    pub async fn connect(
         context: &Context,
-        hostname: &str,
+        host: &str,
         port: u16,
         strict_tls: bool,
+        socks5_config: Option<Socks5Config>,
+        security: Socket,
     ) -> Result<Self> {
-        let tcp_stream = connect_tcp(context, hostname, port, IMAP_TIMEOUT, strict_tls).await?;
-        let tls_stream = wrap_tls(strict_tls, hostname, tcp_stream).await?;
+        if let Some(socks5_config) = socks5_config {
+            let client = match security {
+                Socket::Automatic => bail!("IMAP port security is not configured"),
+                Socket::Ssl => {
+                    Client::connect_secure_socks5(context, host, port, strict_tls, socks5_config)
+                        .await?
+                }
+                Socket::Starttls => {
+                    Client::connect_starttls_socks5(context, host, port, socks5_config, strict_tls)
+                        .await?
+                }
+                Socket::Plain => {
+                    Client::connect_insecure_socks5(context, host, port, socks5_config).await?
+                }
+            };
+            Ok(client)
+        } else {
+            let mut first_error = None;
+            let load_cache =
+                strict_tls && (security == Socket::Ssl || security == Socket::Starttls);
+            for resolved_addr in
+                lookup_host_with_cache(context, host, port, "imap", load_cache).await?
+            {
+                let res = match security {
+                    Socket::Automatic => bail!("IMAP port security is not configured"),
+                    Socket::Ssl => Client::connect_secure(resolved_addr, host, strict_tls).await,
+                    Socket::Starttls => {
+                        Client::connect_starttls(resolved_addr, host, strict_tls).await
+                    }
+                    Socket::Plain => Client::connect_insecure(resolved_addr).await,
+                };
+                match res {
+                    Ok(client) => {
+                        let ip_addr = resolved_addr.ip().to_string();
+                        if load_cache {
+                            update_connect_timestamp(context, host, &ip_addr).await?;
+                        }
+                        update_connection_history(context, "imap", host, port, &ip_addr, time())
+                            .await?;
+                        return Ok(client);
+                    }
+                    Err(err) => {
+                        warn!(context, "Failed to connect to {resolved_addr}: {err:#}.");
+                        first_error.get_or_insert(err);
+                    }
+                }
+            }
+            Err(first_error.unwrap_or_else(|| format_err!("no DNS resolution results for {host}")))
+        }
+    }
+
+    async fn connect_secure(addr: SocketAddr, hostname: &str, strict_tls: bool) -> Result<Self> {
+        let tls_stream = connect_tls_inner(addr, hostname, strict_tls, alpn(addr.port())).await?;
         let buffered_stream = BufWriter::new(tls_stream);
         let session_stream: Box<dyn SessionStream> = Box::new(buffered_stream);
         let mut client = Client::new(session_stream);
@@ -116,8 +178,8 @@ impl Client {
         Ok(client)
     }
 
-    pub async fn connect_insecure(context: &Context, hostname: &str, port: u16) -> Result<Self> {
-        let tcp_stream = connect_tcp(context, hostname, port, IMAP_TIMEOUT, false).await?;
+    async fn connect_insecure(addr: SocketAddr) -> Result<Self> {
+        let tcp_stream = connect_tcp_inner(addr).await?;
         let buffered_stream = BufWriter::new(tcp_stream);
         let session_stream: Box<dyn SessionStream> = Box::new(buffered_stream);
         let mut client = Client::new(session_stream);
@@ -128,17 +190,12 @@ impl Client {
         Ok(client)
     }
 
-    pub async fn connect_starttls(
-        context: &Context,
-        hostname: &str,
-        port: u16,
-        strict_tls: bool,
-    ) -> Result<Self> {
-        let tcp_stream = connect_tcp(context, hostname, port, IMAP_TIMEOUT, strict_tls).await?;
+    async fn connect_starttls(addr: SocketAddr, host: &str, strict_tls: bool) -> Result<Self> {
+        let tcp_stream = connect_tcp_inner(addr).await?;
 
         // Run STARTTLS command and convert the client back into a stream.
         let buffered_tcp_stream = BufWriter::new(tcp_stream);
-        let mut client = ImapClient::new(buffered_tcp_stream);
+        let mut client = async_imap::Client::new(buffered_tcp_stream);
         let _greeting = client
             .read_response()
             .await
@@ -150,7 +207,7 @@ impl Client {
         let buffered_tcp_stream = client.into_inner();
         let tcp_stream = buffered_tcp_stream.into_inner();
 
-        let tls_stream = wrap_tls(strict_tls, hostname, tcp_stream)
+        let tls_stream = wrap_tls(strict_tls, host, &[], tcp_stream)
             .await
             .context("STARTTLS upgrade failed")?;
 
@@ -160,7 +217,7 @@ impl Client {
         Ok(client)
     }
 
-    pub async fn connect_secure_socks5(
+    async fn connect_secure_socks5(
         context: &Context,
         domain: &str,
         port: u16,
@@ -168,9 +225,9 @@ impl Client {
         socks5_config: Socks5Config,
     ) -> Result<Self> {
         let socks5_stream = socks5_config
-            .connect(context, domain, port, IMAP_TIMEOUT, strict_tls)
+            .connect(context, domain, port, strict_tls)
             .await?;
-        let tls_stream = wrap_tls(strict_tls, domain, socks5_stream).await?;
+        let tls_stream = wrap_tls(strict_tls, domain, alpn(port), socks5_stream).await?;
         let buffered_stream = BufWriter::new(tls_stream);
         let session_stream: Box<dyn SessionStream> = Box::new(buffered_stream);
         let mut client = Client::new(session_stream);
@@ -181,15 +238,13 @@ impl Client {
         Ok(client)
     }
 
-    pub async fn connect_insecure_socks5(
+    async fn connect_insecure_socks5(
         context: &Context,
         domain: &str,
         port: u16,
         socks5_config: Socks5Config,
     ) -> Result<Self> {
-        let socks5_stream = socks5_config
-            .connect(context, domain, port, IMAP_TIMEOUT, false)
-            .await?;
+        let socks5_stream = socks5_config.connect(context, domain, port, false).await?;
         let buffered_stream = BufWriter::new(socks5_stream);
         let session_stream: Box<dyn SessionStream> = Box::new(buffered_stream);
         let mut client = Client::new(session_stream);
@@ -200,7 +255,7 @@ impl Client {
         Ok(client)
     }
 
-    pub async fn connect_starttls_socks5(
+    async fn connect_starttls_socks5(
         context: &Context,
         hostname: &str,
         port: u16,
@@ -208,7 +263,7 @@ impl Client {
         strict_tls: bool,
     ) -> Result<Self> {
         let socks5_stream = socks5_config
-            .connect(context, hostname, port, IMAP_TIMEOUT, strict_tls)
+            .connect(context, hostname, port, strict_tls)
             .await?;
 
         // Run STARTTLS command and convert the client back into a stream.
@@ -225,7 +280,7 @@ impl Client {
         let buffered_socks5_stream = client.into_inner();
         let socks5_stream: Socks5Stream<_> = buffered_socks5_stream.into_inner();
 
-        let tls_stream = wrap_tls(strict_tls, hostname, socks5_stream)
+        let tls_stream = wrap_tls(strict_tls, hostname, &[], socks5_stream)
             .await
             .context("STARTTLS upgrade failed")?;
         let buffered_stream = BufWriter::new(tls_stream);

src/imap/idle.rs

@@ -9,7 +9,8 @@ use tokio::time::timeout;
 use super::session::Session;
 use super::Imap;
 use crate::context::Context;
-use crate::imap::{client::IMAP_TIMEOUT, FolderMeaning};
+use crate::imap::FolderMeaning;
+use crate::net::TIMEOUT;
 use crate::tools::{self, time_elapsed};
 
 /// Timeout after which IDLE is finished
@@ -51,7 +52,7 @@ impl Session {
 
         // At this point IDLE command was sent and we received a "+ idling" response. We will now
         // read from the stream without getting any data for up to `IDLE_TIMEOUT`. If we don't
-        // disable read timeout, we would get a timeout after `IMAP_TIMEOUT`, which is a lot
+        // disable read timeout, we would get a timeout after `crate::net::TIMEOUT`, which is a lot
         // shorter than `IDLE_TIMEOUT`.
         handle.as_mut().set_read_timeout(None);
         let (idle_wait, interrupt) = handle.wait_with_timeout(IDLE_TIMEOUT);
@@ -93,7 +94,7 @@ impl Session {
             .await
             .with_context(|| format!("{folder}: IMAP IDLE protocol timed out"))?
             .with_context(|| format!("{folder}: IMAP IDLE failed"))?;
-        session.as_mut().set_read_timeout(Some(IMAP_TIMEOUT));
+        session.as_mut().set_read_timeout(Some(TIMEOUT));
         self.inner = session;
 
         // Fetch mail once we exit IDLE.

src/imap/session.rs

@@ -24,6 +24,7 @@ const PREFETCH_FLAGS: &str = "(UID INTERNALDATE RFC822.SIZE BODY.PEEK[HEADER.FIE
                               FROM \
                               IN-REPLY-TO REFERENCES \
                               CHAT-VERSION \
+                              AUTO-SUBMITTED \
                               AUTOCRYPT-SETUP-MESSAGE\
                               )])";
 

src/imex.rs

@@ -1,41 +1,35 @@
 //! # Import/export module.
 
-use std::any::Any;
 use std::ffi::OsStr;
 use std::path::{Path, PathBuf};
 
 use ::pgp::types::KeyTrait;
 use anyhow::{bail, ensure, format_err, Context as _, Result};
 use deltachat_contact_tools::EmailAddress;
-use futures::StreamExt;
+use futures::TryStreamExt;
 use futures_lite::FutureExt;
-use rand::{thread_rng, Rng};
+
 use tokio::fs::{self, File};
 use tokio_tar::Archive;
 
-use crate::blob::{BlobDirContents, BlobObject};
-use crate::chat::{self, delete_and_reset_all_device_msgs, ChatId};
-use crate::config::Config;
-use crate::contact::ContactId;
+use crate::blob::BlobDirContents;
+use crate::chat::{self, delete_and_reset_all_device_msgs};
 use crate::context::Context;
 use crate::e2ee;
 use crate::events::EventType;
-use crate::key::{
-    self, load_self_secret_key, DcKey, DcSecretKey, SignedPublicKey, SignedSecretKey,
-};
+use crate::key::{self, DcKey, DcSecretKey, SignedPublicKey, SignedSecretKey};
 use crate::log::LogExt;
-use crate::message::{Message, MsgId, Viewtype};
-use crate::mimeparser::SystemMessage;
-use crate::param::Param;
+use crate::message::{Message, Viewtype};
 use crate::pgp;
 use crate::sql;
-use crate::stock_str;
 use crate::tools::{
-    create_folder, delete_file, get_filesuffix_lc, open_file_std, read_file, time, write_file,
+    create_folder, delete_file, get_filesuffix_lc, read_file, time, write_file, TempPathGuard,
 };
 
+mod key_transfer;
 mod transfer;
 
+pub use key_transfer::{continue_key_transfer, initiate_key_transfer};
 pub use transfer::{get_backup, BackupProvider};
 
 // Name of the database file in the backup.
@@ -47,12 +41,13 @@ pub(crate) const BLOBS_BACKUP_NAME: &str = "blobs_backup";
 #[repr(u32)]
 pub enum ImexMode {
     /// Export all private keys and all public keys of the user to the
-    /// directory given as `path`.  The default key is written to the files `public-key-default.asc`
-    /// and `private-key-default.asc`, if there are more keys, they are written to files as
-    /// `public-key-<id>.asc` and `private-key-<id>.asc`
+    /// directory given as `path`. The default key is written to the files
+    /// `{public,private}-key-<addr>-default-<fingerprint>.asc`, if there are more keys, they are
+    /// written to files as `{public,private}-key-<addr>-<id>-<fingerprint>.asc`.
     ExportSelfKeys = 1,
 
-    /// Import private keys found in the directory given as `path`.
+    /// Import private keys found in `path` if it is a directory, otherwise import a private key
+    /// from `path`.
     /// The last imported key is made the default keys unless its name contains the string `legacy`.
     /// Public keys are not imported.
     ImportSelfKeys = 2,
@@ -141,117 +136,6 @@ pub async fn has_backup(_context: &Context, dir_name: &Path) -> Result<String> {
     }
 }
 
-/// Initiates key transfer via Autocrypt Setup Message.
-///
-/// Returns setup code.
-pub async fn initiate_key_transfer(context: &Context) -> Result<String> {
-    let setup_code = create_setup_code(context);
-    /* this may require a keypair to be created. this may take a second ... */
-    let setup_file_content = render_setup_file(context, &setup_code).await?;
-    /* encrypting may also take a while ... */
-    let setup_file_blob = BlobObject::create(
-        context,
-        "autocrypt-setup-message.html",
-        setup_file_content.as_bytes(),
-    )
-    .await?;
-
-    let chat_id = ChatId::create_for_contact(context, ContactId::SELF).await?;
-    let mut msg = Message {
-        viewtype: Viewtype::File,
-        ..Default::default()
-    };
-    msg.param.set(Param::File, setup_file_blob.as_name());
-    msg.subject = stock_str::ac_setup_msg_subject(context).await;
-    msg.param
-        .set(Param::MimeType, "application/autocrypt-setup");
-    msg.param.set_cmd(SystemMessage::AutocryptSetupMessage);
-    msg.force_plaintext();
-    msg.param.set_int(Param::SkipAutocrypt, 1);
-
-    chat::send_msg(context, chat_id, &mut msg).await?;
-    // no maybe_add_bcc_self_device_msg() here.
-    // the ui shows the dialog with the setup code on this device,
-    // it would be too much noise to have two things popping up at the same time.
-    // maybe_add_bcc_self_device_msg() is called on the other device
-    // once the transfer is completed.
-    Ok(setup_code)
-}
-
-/// Renders HTML body of a setup file message.
-///
-/// The `passphrase` must be at least 2 characters long.
-pub async fn render_setup_file(context: &Context, passphrase: &str) -> Result<String> {
-    let passphrase_begin = if let Some(passphrase_begin) = passphrase.get(..2) {
-        passphrase_begin
-    } else {
-        bail!("Passphrase must be at least 2 chars long.");
-    };
-    let private_key = load_self_secret_key(context).await?;
-    let ac_headers = match context.get_config_bool(Config::E2eeEnabled).await? {
-        false => None,
-        true => Some(("Autocrypt-Prefer-Encrypt", "mutual")),
-    };
-    let private_key_asc = private_key.to_asc(ac_headers);
-    let encr = pgp::symm_encrypt(passphrase, private_key_asc.as_bytes())
-        .await?
-        .replace('\n', "\r\n");
-
-    let replacement = format!(
-        concat!(
-            "-----BEGIN PGP MESSAGE-----\r\n",
-            "Passphrase-Format: numeric9x4\r\n",
-            "Passphrase-Begin: {}"
-        ),
-        passphrase_begin
-    );
-    let pgp_msg = encr.replace("-----BEGIN PGP MESSAGE-----", &replacement);
-
-    let msg_subj = stock_str::ac_setup_msg_subject(context).await;
-    let msg_body = stock_str::ac_setup_msg_body(context).await;
-    let msg_body_html = msg_body.replace('\r', "").replace('\n', "<br>");
-    Ok(format!(
-        concat!(
-            "<!DOCTYPE html>\r\n",
-            "<html>\r\n",
-            "  <head>\r\n",
-            "    <title>{}</title>\r\n",
-            "  </head>\r\n",
-            "  <body>\r\n",
-            "    <h1>{}</h1>\r\n",
-            "    <p>{}</p>\r\n",
-            "    <pre>\r\n{}\r\n</pre>\r\n",
-            "  </body>\r\n",
-            "</html>\r\n"
-        ),
-        msg_subj, msg_subj, msg_body_html, pgp_msg
-    ))
-}
-
-/// Creates a new setup code for Autocrypt Setup Message.
-pub fn create_setup_code(_context: &Context) -> String {
-    let mut random_val: u16;
-    let mut rng = thread_rng();
-    let mut ret = String::new();
-
-    for i in 0..9 {
-        loop {
-            random_val = rng.gen();
-            if random_val as usize <= 60000 {
-                break;
-            }
-        }
-        random_val = (random_val as usize % 10000) as u16;
-        ret += &format!(
-            "{}{:04}",
-            if 0 != i { "-" } else { "" },
-            random_val as usize
-        );
-    }
-
-    ret
-}
-
 async fn maybe_add_bcc_self_device_msg(context: &Context) -> Result<()> {
     if !context.sql.get_raw_config_bool("bcc_self").await? {
         let mut msg = Message::new(Viewtype::Text);
@@ -265,36 +149,6 @@ async fn maybe_add_bcc_self_device_msg(context: &Context) -> Result<()> {
     Ok(())
 }
 
-/// Continue key transfer via Autocrypt Setup Message.
-///
-/// `msg_id` is the ID of the received Autocrypt Setup Message.
-/// `setup_code` is the code entered by the user.
-pub async fn continue_key_transfer(
-    context: &Context,
-    msg_id: MsgId,
-    setup_code: &str,
-) -> Result<()> {
-    ensure!(!msg_id.is_special(), "wrong id");
-
-    let msg = Message::load_from_db(context, msg_id).await?;
-    ensure!(
-        msg.is_setupmessage(),
-        "Message is no Autocrypt Setup Message."
-    );
-
-    if let Some(filename) = msg.get_file(context) {
-        let file = open_file_std(context, filename)?;
-        let sc = normalize_setup_code(setup_code);
-        let armored_key = decrypt_setup_file(&sc, file).await?;
-        set_self_key(context, &armored_key, true).await?;
-        maybe_add_bcc_self_device_msg(context).await?;
-
-        Ok(())
-    } else {
-        bail!("Message is no Autocrypt Setup Message.");
-    }
-}
-
 async fn set_self_key(context: &Context, armored: &str, set_default: bool) -> Result<()> {
     // try hard to only modify key-state
     let (private_key, header) = SignedSecretKey::from_asc(armored)?;
@@ -345,29 +199,6 @@ async fn set_self_key(context: &Context, armored: &str, set_default: bool) -> Re
     Ok(())
 }
 
-async fn decrypt_setup_file<T: std::io::Read + std::io::Seek>(
-    passphrase: &str,
-    file: T,
-) -> Result<String> {
-    let plain_bytes = pgp::symm_decrypt(passphrase, file).await?;
-    let plain_text = std::string::String::from_utf8(plain_bytes)?;
-
-    Ok(plain_text)
-}
-
-fn normalize_setup_code(s: &str) -> String {
-    let mut out = String::new();
-    for c in s.chars() {
-        if c.is_ascii_digit() {
-            out.push(c);
-            if let 4 | 9 | 14 | 19 | 24 | 29 | 34 | 39 = out.len() {
-                out += "-"
-            }
-        }
-    }
-    out
-}
-
 async fn imex_inner(
     context: &Context,
     what: ImexMode,
@@ -438,51 +269,126 @@ async fn import_backup(
         context.get_dbfile().display()
     );
 
+    import_backup_stream(context, backup_file, file_size, passphrase).await?;
+    Ok(())
+}
+
+/// Imports backup by reading a tar file from a stream.
+///
+/// `file_size` is used to calculate the progress
+/// and emit progress events.
+/// Ideally it is the sum of the entry
+/// sizes without the header overhead,
+/// but can be estimated as tar file size
+/// in which case the progress is underestimated
+/// and may not reach 99.9% by the end of import.
+/// Underestimating is better than
+/// overestimating because the progress
+/// jumps to 100% instead of getting stuck at 99.9%
+/// for some time.
+pub(crate) async fn import_backup_stream<R: tokio::io::AsyncRead + Unpin>(
+    context: &Context,
+    backup_file: R,
+    file_size: u64,
+    passphrase: String,
+) -> Result<()> {
+    import_backup_stream_inner(context, backup_file, file_size, passphrase)
+        .await
+        .0
+}
+
+async fn import_backup_stream_inner<R: tokio::io::AsyncRead + Unpin>(
+    context: &Context,
+    backup_file: R,
+    file_size: u64,
+    passphrase: String,
+) -> (Result<()>,) {
     let mut archive = Archive::new(backup_file);
 
-    let mut entries = archive.entries()?;
-    let mut last_progress = 0;
-    while let Some(file) = entries.next().await {
-        let f = &mut file?;
-
-        let current_pos = f.raw_file_position();
-        let progress = 1000 * current_pos / file_size;
-        if progress != last_progress && progress > 10 && progress < 1000 {
-            // We already emitted ImexProgress(10) above
+    let mut entries = match archive.entries() {
+        Ok(entries) => entries,
+        Err(e) => return (Err(e).context("Failed to get archive entries"),),
+    };
+    let mut blobs = Vec::new();
+    // We already emitted ImexProgress(10) above
+    let mut last_progress = 10;
+    const PROGRESS_MIGRATIONS: u128 = 999;
+    let mut total_size: u64 = 0;
+    let mut res: Result<()> = loop {
+        let mut f = match entries.try_next().await {
+            Ok(Some(f)) => f,
+            Ok(None) => break Ok(()),
+            Err(e) => break Err(e).context("Failed to get next entry"),
+        };
+        total_size += match f.header().entry_size() {
+            Ok(size) => size,
+            Err(e) => break Err(e).context("Failed to get entry size"),
+        };
+        let max = PROGRESS_MIGRATIONS - 1;
+        let progress = std::cmp::min(
+            max * u128::from(total_size) / std::cmp::max(u128::from(file_size), 1),
+            max,
+        );
+        if progress > last_progress {
             context.emit_event(EventType::ImexProgress(progress as usize));
             last_progress = progress;
         }
 
-        if f.path()?.file_name() == Some(OsStr::new(DBFILE_BACKUP_NAME)) {
-            // async_tar can't unpack to a specified file name, so we just unpack to the blobdir and then move the unpacked file.
-            f.unpack_in(context.get_blobdir()).await?;
-            let unpacked_database = context.get_blobdir().join(DBFILE_BACKUP_NAME);
-            context
-                .sql
-                .import(&unpacked_database, passphrase.clone())
-                .await
-                .context("cannot import unpacked database")?;
-            fs::remove_file(unpacked_database)
-                .await
-                .context("cannot remove unpacked database")?;
-        } else {
-            // async_tar will unpack to blobdir/BLOBS_BACKUP_NAME, so we move the file afterwards.
-            f.unpack_in(context.get_blobdir()).await?;
-            let from_path = context.get_blobdir().join(f.path()?);
-            if from_path.is_file() {
-                if let Some(name) = from_path.file_name() {
-                    fs::rename(&from_path, context.get_blobdir().join(name)).await?;
-                } else {
-                    warn!(context, "No file name");
+        let path = match f.path() {
+            Ok(path) => path.to_path_buf(),
+            Err(e) => break Err(e).context("Failed to get entry path"),
+        };
+        if let Err(e) = f.unpack_in(context.get_blobdir()).await {
+            break Err(e).context("Failed to unpack file");
+        }
+        if path.file_name() == Some(OsStr::new(DBFILE_BACKUP_NAME)) {
+            continue;
+        }
+        // async_tar unpacked to $BLOBDIR/BLOBS_BACKUP_NAME/, so we move the file afterwards.
+        let from_path = context.get_blobdir().join(&path);
+        if from_path.is_file() {
+            if let Some(name) = from_path.file_name() {
+                let to_path = context.get_blobdir().join(name);
+                if let Err(e) = fs::rename(&from_path, &to_path).await {
+                    blobs.push(from_path);
+                    break Err(e).context("Failed to move file to blobdir");
                 }
+                blobs.push(to_path);
+            } else {
+                warn!(context, "No file name");
             }
         }
+    };
+    if res.is_err() {
+        for blob in blobs {
+            fs::remove_file(&blob).await.log_err(context).ok();
+        }
     }
 
-    context.sql.run_migrations(context).await?;
-    delete_and_reset_all_device_msgs(context).await?;
-
-    Ok(())
+    let unpacked_database = context.get_blobdir().join(DBFILE_BACKUP_NAME);
+    if res.is_ok() {
+        res = context
+            .sql
+            .import(&unpacked_database, passphrase.clone())
+            .await
+            .context("cannot import unpacked database");
+    }
+    fs::remove_file(unpacked_database)
+        .await
+        .context("cannot remove unpacked database")
+        .log_err(context)
+        .ok();
+    if res.is_ok() {
+        context.emit_event(EventType::ImexProgress(PROGRESS_MIGRATIONS as usize));
+        res = context.sql.run_migrations(context).await;
+    }
+    if res.is_ok() {
+        delete_and_reset_all_device_msgs(context)
+            .await
+            .log_err(context)
+            .ok();
+    }
+    (res,)
 }
 
 /*******************************************************************************
@@ -530,8 +436,8 @@ async fn export_backup(context: &Context, dir: &Path, passphrase: String) -> Res
     let now = time();
     let self_addr = context.get_primary_self_addr().await?;
     let (temp_db_path, temp_path, dest_path) = get_next_backup_path(dir, &self_addr, now)?;
-    let _d1 = DeleteOnDrop(temp_db_path.clone());
-    let _d2 = DeleteOnDrop(temp_path.clone());
+    let temp_db_path = TempPathGuard::new(temp_db_path);
+    let temp_path = TempPathGuard::new(temp_path);
 
     export_database(context, &temp_db_path, passphrase, now)
         .await
@@ -544,52 +450,40 @@ async fn export_backup(context: &Context, dir: &Path, passphrase: String) -> Res
         dest_path.display(),
     );
 
-    let res = export_backup_inner(context, &temp_db_path, &temp_path).await;
-
-    match &res {
-        Ok(_) => {
-            fs::rename(temp_path, &dest_path).await?;
-            context.emit_event(EventType::ImexFileWritten(dest_path));
-        }
-        Err(e) => {
-            error!(context, "backup failed: {}", e);
-        }
-    }
-
-    res
-}
-struct DeleteOnDrop(PathBuf);
-impl Drop for DeleteOnDrop {
-    fn drop(&mut self) {
-        let file = self.0.clone();
-        // Not using `tools::delete_file` here because it would send a DeletedBlobFile event
-        // Hack to avoid panic in nested runtime calls of tokio
-        std::fs::remove_file(file).ok();
-    }
+    let file = File::create(&temp_path).await?;
+    let blobdir = BlobDirContents::new(context).await?;
+    export_backup_stream(context, &temp_db_path, blobdir, file)
+        .await
+        .context("Exporting backup to file failed")?;
+    fs::rename(temp_path, &dest_path).await?;
+    context.emit_event(EventType::ImexFileWritten(dest_path));
+    Ok(())
 }
 
-async fn export_backup_inner(
-    context: &Context,
+/// Exports the database and blobs into a stream.
+pub(crate) async fn export_backup_stream<'a, W>(
+    context: &'a Context,
     temp_db_path: &Path,
-    temp_path: &Path,
-) -> Result<()> {
-    let file = File::create(temp_path).await?;
-
-    let mut builder = tokio_tar::Builder::new(file);
+    blobdir: BlobDirContents<'a>,
+    writer: W,
+) -> Result<()>
+where
+    W: tokio::io::AsyncWrite + tokio::io::AsyncWriteExt + Unpin + Send + 'static,
+{
+    let mut builder = tokio_tar::Builder::new(writer);
 
     builder
         .append_path_with_name(temp_db_path, DBFILE_BACKUP_NAME)
         .await?;
 
-    let blobdir = BlobDirContents::new(context).await?;
-    let mut last_progress = 0;
+    let mut last_progress = 10;
 
     for (i, blob) in blobdir.iter().enumerate() {
         let mut file = File::open(blob.to_abs_path()).await?;
         let path_in_archive = PathBuf::from(BLOBS_BACKUP_NAME).join(blob.as_name());
         builder.append_file(path_in_archive, &mut file).await?;
-        let progress = 1000 * i / blobdir.len();
-        if progress != last_progress && progress > 10 && progress < 1000 {
+        let progress = std::cmp::min(1000 * i / blobdir.len(), 999);
+        if progress > last_progress {
             context.emit_event(EventType::ImexProgress(progress));
             last_progress = progress;
         }
@@ -695,12 +589,12 @@ async fn export_self_keys(context: &Context, dir: &Path) -> Result<()> {
             },
         )
         .await?;
-
+    let self_addr = context.get_primary_self_addr().await?;
     for (id, public_key, private_key, is_default) in keys {
         let id = Some(id).filter(|_| is_default == 0);
 
         if let Ok(key) = public_key {
-            if let Err(err) = export_key_to_asc_file(context, dir, id, &key).await {
+            if let Err(err) = export_key_to_asc_file(context, dir, &self_addr, id, &key).await {
                 error!(context, "Failed to export public key: {:#}.", err);
                 export_errors += 1;
             }
@@ -708,7 +602,7 @@ async fn export_self_keys(context: &Context, dir: &Path) -> Result<()> {
             export_errors += 1;
         }
         if let Ok(key) = private_key {
-            if let Err(err) = export_key_to_asc_file(context, dir, id, &key).await {
+            if let Err(err) = export_key_to_asc_file(context, dir, &self_addr, id, &key).await {
                 error!(context, "Failed to export private key: {:#}.", err);
                 export_errors += 1;
             }
@@ -721,46 +615,43 @@ async fn export_self_keys(context: &Context, dir: &Path) -> Result<()> {
     Ok(())
 }
 
-/*******************************************************************************
- * Classic key export
- ******************************************************************************/
+/// Returns the exported key file name inside `dir`.
 async fn export_key_to_asc_file<T>(
     context: &Context,
     dir: &Path,
+    addr: &str,
     id: Option<i64>,
     key: &T,
-) -> Result<()>
+) -> Result<String>
 where
-    T: DcKey + Any,
+    T: DcKey,
 {
     let file_name = {
-        let any_key = key as &dyn Any;
-        let kind = if any_key.downcast_ref::<SignedPublicKey>().is_some() {
-            "public"
-        } else if any_key.downcast_ref::<SignedSecretKey>().is_some() {
-            "private"
-        } else {
-            "unknown"
+        let kind = match T::is_private() {
+            false => "public",
+            true => "private",
         };
         let id = id.map_or("default".into(), |i| i.to_string());
-        dir.join(format!("{}-key-{}.asc", kind, &id))
+        let fp = DcKey::fingerprint(key).hex();
+        format!("{kind}-key-{addr}-{id}-{fp}.asc")
     };
+    let path = dir.join(&file_name);
     info!(
         context,
-        "Exporting key {:?} to {}",
+        "Exporting key {:?} to {}.",
         key.key_id(),
-        file_name.display()
+        path.display()
     );
 
     // Delete the file if it already exists.
-    delete_file(context, &file_name).await.ok();
+    delete_file(context, &path).await.ok();
 
     let content = key.to_asc(None).into_bytes();
-    write_file(context, &file_name, &content)
+    write_file(context, &path, &content)
         .await
-        .with_context(|| format!("cannot write key to {}", file_name.display()))?;
-    context.emit_event(EventType::ImexFileWritten(file_name));
-    Ok(())
+        .with_context(|| format!("cannot write key to {}", path.display()))?;
+    context.emit_event(EventType::ImexFileWritten(path));
+    Ok(file_name)
 }
 
 /// Exports the database to *dest*, encrypted using *passphrase*.
@@ -819,92 +710,57 @@ async fn export_database(
 mod tests {
     use std::time::Duration;
 
-    use ::pgp::armor::BlockType;
     use tokio::task;
 
     use super::*;
-    use crate::pgp::{split_armored_data, HEADER_AUTOCRYPT, HEADER_SETUPCODE};
-    use crate::receive_imf::receive_imf;
-    use crate::stock_str::StockMessage;
-    use crate::test_utils::{alice_keypair, TestContext, TestContextManager};
-
-    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
-    async fn test_render_setup_file() {
-        let t = TestContext::new_alice().await;
-        let msg = render_setup_file(&t, "hello").await.unwrap();
-        println!("{}", &msg);
-        // Check some substrings, indicating things got substituted.
-        assert!(msg.contains("<title>Autocrypt Setup Message</title"));
-        assert!(msg.contains("<h1>Autocrypt Setup Message</h1>"));
-        assert!(msg.contains("<p>This is the Autocrypt Setup Message used to"));
-        assert!(msg.contains("-----BEGIN PGP MESSAGE-----\r\n"));
-        assert!(msg.contains("Passphrase-Format: numeric9x4\r\n"));
-        assert!(msg.contains("Passphrase-Begin: he\r\n"));
-        assert!(msg.contains("-----END PGP MESSAGE-----\r\n"));
-
-        for line in msg.rsplit_terminator('\n') {
-            assert!(line.ends_with('\r'));
-        }
-    }
-
-    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
-    async fn test_render_setup_file_newline_replace() {
-        let t = TestContext::new_alice().await;
-        t.set_stock_translation(StockMessage::AcSetupMsgBody, "hello\r\nthere".to_string())
-            .await
-            .unwrap();
-        let msg = render_setup_file(&t, "pw").await.unwrap();
-        println!("{}", &msg);
-        assert!(msg.contains("<p>hello<br>there</p>"));
-    }
-
-    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
-    async fn test_create_setup_code() {
-        let t = TestContext::new().await;
-        let setupcode = create_setup_code(&t);
-        assert_eq!(setupcode.len(), 44);
-        assert_eq!(setupcode.chars().nth(4).unwrap(), '-');
-        assert_eq!(setupcode.chars().nth(9).unwrap(), '-');
-        assert_eq!(setupcode.chars().nth(14).unwrap(), '-');
-        assert_eq!(setupcode.chars().nth(19).unwrap(), '-');
-        assert_eq!(setupcode.chars().nth(24).unwrap(), '-');
-        assert_eq!(setupcode.chars().nth(29).unwrap(), '-');
-        assert_eq!(setupcode.chars().nth(34).unwrap(), '-');
-        assert_eq!(setupcode.chars().nth(39).unwrap(), '-');
-    }
+    use crate::config::Config;
+    use crate::test_utils::{alice_keypair, TestContext};
 
     #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
     async fn test_export_public_key_to_asc_file() {
         let context = TestContext::new().await;
         let key = alice_keypair().public;
         let blobdir = Path::new("$BLOBDIR");
-        assert!(export_key_to_asc_file(&context.ctx, blobdir, None, &key)
+        let filename = export_key_to_asc_file(&context.ctx, blobdir, "a@b", None, &key)
             .await
-            .is_ok());
+            .unwrap();
+        assert!(filename.starts_with("public-key-a@b-default-"));
+        assert!(filename.ends_with(".asc"));
         let blobdir = context.ctx.get_blobdir().to_str().unwrap();
-        let filename = format!("{blobdir}/public-key-default.asc");
+        let filename = format!("{blobdir}/{filename}");
         let bytes = tokio::fs::read(&filename).await.unwrap();
 
         assert_eq!(bytes, key.to_asc(None).into_bytes());
     }
 
     #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
-    async fn test_export_private_key_to_asc_file() {
+    async fn test_import_private_key_exported_to_asc_file() {
         let context = TestContext::new().await;
         let key = alice_keypair().secret;
         let blobdir = Path::new("$BLOBDIR");
-        assert!(export_key_to_asc_file(&context.ctx, blobdir, None, &key)
+        let filename = export_key_to_asc_file(&context.ctx, blobdir, "a@b", None, &key)
             .await
-            .is_ok());
+            .unwrap();
+        let fingerprint = filename
+            .strip_prefix("private-key-a@b-default-")
+            .unwrap()
+            .strip_suffix(".asc")
+            .unwrap();
+        assert_eq!(fingerprint, DcKey::fingerprint(&key).hex());
         let blobdir = context.ctx.get_blobdir().to_str().unwrap();
-        let filename = format!("{blobdir}/private-key-default.asc");
+        let filename = format!("{blobdir}/{filename}");
         let bytes = tokio::fs::read(&filename).await.unwrap();
 
         assert_eq!(bytes, key.to_asc(None).into_bytes());
+
+        let alice = &TestContext::new_alice().await;
+        if let Err(err) = imex(alice, ImexMode::ImportSelfKeys, Path::new(&filename), None).await {
+            panic!("got error on import: {err:#}");
+        }
     }
 
     #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
-    async fn test_export_and_import_key() {
+    async fn test_export_and_import_key_from_dir() {
         let export_dir = tempfile::tempdir().unwrap();
 
         let context = TestContext::new_alice().await;
@@ -930,12 +786,6 @@ mod tests {
         {
             panic!("got error on import: {err:#}");
         }
-
-        let keyfile = export_dir.path().join("private-key-default.asc");
-        let context3 = TestContext::new_alice().await;
-        if let Err(err) = imex(&context3.ctx, ImexMode::ImportSelfKeys, &keyfile, None).await {
-            panic!("got error on import: {err:#}");
-        }
     }
 
     #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
@@ -1080,137 +930,4 @@ mod tests {
 
         Ok(())
     }
-
-    #[test]
-    fn test_normalize_setup_code() {
-        let norm = normalize_setup_code("123422343234423452346234723482349234");
-        assert_eq!(norm, "1234-2234-3234-4234-5234-6234-7234-8234-9234");
-
-        let norm =
-            normalize_setup_code("\t1 2 3422343234- foo bar-- 423-45 2 34 6234723482349234      ");
-        assert_eq!(norm, "1234-2234-3234-4234-5234-6234-7234-8234-9234");
-    }
-
-    /* S_EM_SETUPFILE is a AES-256 symm. encrypted setup message created by Enigmail
-    with an "encrypted session key", see RFC 4880.  The code is in S_EM_SETUPCODE */
-    const S_EM_SETUPCODE: &str = "1742-0185-6197-1303-7016-8412-3581-4441-0597";
-    const S_EM_SETUPFILE: &str = include_str!("../test-data/message/stress.txt");
-
-    // Autocrypt Setup Message payload "encrypted" with plaintext algorithm.
-    const S_PLAINTEXT_SETUPFILE: &str =
-        include_str!("../test-data/message/plaintext-autocrypt-setup.txt");
-
-    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
-    async fn test_split_and_decrypt() {
-        let buf_1 = S_EM_SETUPFILE.as_bytes().to_vec();
-        let (typ, headers, base64) = split_armored_data(&buf_1).unwrap();
-        assert_eq!(typ, BlockType::Message);
-        assert!(S_EM_SETUPCODE.starts_with(headers.get(HEADER_SETUPCODE).unwrap()));
-        assert!(!headers.contains_key(HEADER_AUTOCRYPT));
-
-        assert!(!base64.is_empty());
-
-        let setup_file = S_EM_SETUPFILE.to_string();
-        let decrypted =
-            decrypt_setup_file(S_EM_SETUPCODE, std::io::Cursor::new(setup_file.as_bytes()))
-                .await
-                .unwrap();
-
-        let (typ, headers, _base64) = split_armored_data(decrypted.as_bytes()).unwrap();
-
-        assert_eq!(typ, BlockType::PrivateKey);
-        assert_eq!(headers.get(HEADER_AUTOCRYPT), Some(&"mutual".to_string()));
-        assert!(!headers.contains_key(HEADER_SETUPCODE));
-    }
-
-    /// Tests that Autocrypt Setup Message encrypted with "plaintext" algorithm cannot be
-    /// decrypted.
-    ///
-    /// According to <https://datatracker.ietf.org/doc/html/rfc4880#section-13.4>
-    /// "Implementations MUST NOT use plaintext in Symmetrically Encrypted Data packets".
-    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
-    async fn test_decrypt_plaintext_autocrypt_setup_message() {
-        let setup_file = S_PLAINTEXT_SETUPFILE.to_string();
-        let incorrect_setupcode = "0000-0000-0000-0000-0000-0000-0000-0000-0000";
-        assert!(decrypt_setup_file(
-            incorrect_setupcode,
-            std::io::Cursor::new(setup_file.as_bytes()),
-        )
-        .await
-        .is_err());
-    }
-
-    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
-    async fn test_key_transfer() -> Result<()> {
-        let alice = TestContext::new_alice().await;
-
-        let setup_code = initiate_key_transfer(&alice).await?;
-
-        // Get Autocrypt Setup Message.
-        let sent = alice.pop_sent_msg().await;
-
-        // Alice sets up a second device.
-        let alice2 = TestContext::new().await;
-        alice2.set_name("alice2");
-        alice2.configure_addr("alice@example.org").await;
-        alice2.recv_msg(&sent).await;
-        let msg = alice2.get_last_msg().await;
-        assert!(msg.is_setupmessage());
-
-        // Send a message that cannot be decrypted because the keys are
-        // not synchronized yet.
-        let sent = alice2.send_text(msg.chat_id, "Test").await;
-        let trashed_message = alice.recv_msg_opt(&sent).await;
-        assert!(trashed_message.is_none());
-        assert_ne!(alice.get_last_msg().await.get_text(), "Test");
-
-        // Transfer the key.
-        continue_key_transfer(&alice2, msg.id, &setup_code).await?;
-
-        // Alice sends a message to self from the new device.
-        let sent = alice2.send_text(msg.chat_id, "Test").await;
-        alice.recv_msg(&sent).await;
-        assert_eq!(alice.get_last_msg().await.get_text(), "Test");
-
-        Ok(())
-    }
-
-    /// Tests that Autocrypt Setup Messages is only clickable if it is self-sent.
-    /// This prevents Bob from tricking Alice into changing the key
-    /// by sending her an Autocrypt Setup Message as long as Alice's server
-    /// does not allow to forge the `From:` header.
-    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
-    async fn test_key_transfer_non_self_sent() -> Result<()> {
-        let mut tcm = TestContextManager::new();
-        let alice = tcm.alice().await;
-        let bob = tcm.bob().await;
-
-        let _setup_code = initiate_key_transfer(&alice).await?;
-
-        // Get Autocrypt Setup Message.
-        let sent = alice.pop_sent_msg().await;
-
-        let rcvd = bob.recv_msg(&sent).await;
-        assert!(!rcvd.is_setupmessage());
-
-        Ok(())
-    }
-
-    /// Tests reception of Autocrypt Setup Message from K-9 6.802.
-    ///
-    /// Unlike Autocrypt Setup Message sent by Delta Chat,
-    /// this message does not contain `Autocrypt-Prefer-Encrypt` header.
-    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
-    async fn test_key_transfer_k_9() -> Result<()> {
-        let t = &TestContext::new().await;
-        t.configure_addr("autocrypt@nine.testrun.org").await;
-
-        let raw = include_bytes!("../test-data/message/k-9-autocrypt-setup-message.eml");
-        let received = receive_imf(t, raw, false).await?.unwrap();
-
-        let setup_code = "0655-9868-8252-5455-4232-5158-1237-5333-2638";
-        continue_key_transfer(t, *received.msg_ids.last().unwrap(), setup_code).await?;
-
-        Ok(())
-    }
 }

src/imex/key_transfer.rs

@@ -0,0 +1,372 @@
+//! # Key transfer via Autocrypt Setup Message.
+use rand::{thread_rng, Rng};
+
+use anyhow::{bail, ensure, Result};
+
+use crate::blob::BlobObject;
+use crate::chat::{self, ChatId};
+use crate::config::Config;
+use crate::contact::ContactId;
+use crate::context::Context;
+use crate::imex::maybe_add_bcc_self_device_msg;
+use crate::imex::set_self_key;
+use crate::key::{load_self_secret_key, DcKey};
+use crate::message::{Message, MsgId, Viewtype};
+use crate::mimeparser::SystemMessage;
+use crate::param::Param;
+use crate::pgp;
+use crate::stock_str;
+use crate::tools::open_file_std;
+
+/// Initiates key transfer via Autocrypt Setup Message.
+///
+/// Returns setup code.
+pub async fn initiate_key_transfer(context: &Context) -> Result<String> {
+    let setup_code = create_setup_code(context);
+    /* this may require a keypair to be created. this may take a second ... */
+    let setup_file_content = render_setup_file(context, &setup_code).await?;
+    /* encrypting may also take a while ... */
+    let setup_file_blob = BlobObject::create(
+        context,
+        "autocrypt-setup-message.html",
+        setup_file_content.as_bytes(),
+    )
+    .await?;
+
+    let chat_id = ChatId::create_for_contact(context, ContactId::SELF).await?;
+    let mut msg = Message {
+        viewtype: Viewtype::File,
+        ..Default::default()
+    };
+    msg.param.set(Param::File, setup_file_blob.as_name());
+    msg.subject = stock_str::ac_setup_msg_subject(context).await;
+    msg.param
+        .set(Param::MimeType, "application/autocrypt-setup");
+    msg.param.set_cmd(SystemMessage::AutocryptSetupMessage);
+    msg.force_plaintext();
+    msg.param.set_int(Param::SkipAutocrypt, 1);
+
+    chat::send_msg(context, chat_id, &mut msg).await?;
+    // no maybe_add_bcc_self_device_msg() here.
+    // the ui shows the dialog with the setup code on this device,
+    // it would be too much noise to have two things popping up at the same time.
+    // maybe_add_bcc_self_device_msg() is called on the other device
+    // once the transfer is completed.
+    Ok(setup_code)
+}
+
+/// Continue key transfer via Autocrypt Setup Message.
+///
+/// `msg_id` is the ID of the received Autocrypt Setup Message.
+/// `setup_code` is the code entered by the user.
+pub async fn continue_key_transfer(
+    context: &Context,
+    msg_id: MsgId,
+    setup_code: &str,
+) -> Result<()> {
+    ensure!(!msg_id.is_special(), "wrong id");
+
+    let msg = Message::load_from_db(context, msg_id).await?;
+    ensure!(
+        msg.is_setupmessage(),
+        "Message is no Autocrypt Setup Message."
+    );
+
+    if let Some(filename) = msg.get_file(context) {
+        let file = open_file_std(context, filename)?;
+        let sc = normalize_setup_code(setup_code);
+        let armored_key = decrypt_setup_file(&sc, file).await?;
+        set_self_key(context, &armored_key, true).await?;
+        maybe_add_bcc_self_device_msg(context).await?;
+
+        Ok(())
+    } else {
+        bail!("Message is no Autocrypt Setup Message.");
+    }
+}
+
+/// Renders HTML body of a setup file message.
+///
+/// The `passphrase` must be at least 2 characters long.
+pub async fn render_setup_file(context: &Context, passphrase: &str) -> Result<String> {
+    let passphrase_begin = if let Some(passphrase_begin) = passphrase.get(..2) {
+        passphrase_begin
+    } else {
+        bail!("Passphrase must be at least 2 chars long.");
+    };
+    let private_key = load_self_secret_key(context).await?;
+    let ac_headers = match context.get_config_bool(Config::E2eeEnabled).await? {
+        false => None,
+        true => Some(("Autocrypt-Prefer-Encrypt", "mutual")),
+    };
+    let private_key_asc = private_key.to_asc(ac_headers);
+    let encr = pgp::symm_encrypt(passphrase, private_key_asc.as_bytes())
+        .await?
+        .replace('\n', "\r\n");
+
+    let replacement = format!(
+        concat!(
+            "-----BEGIN PGP MESSAGE-----\r\n",
+            "Passphrase-Format: numeric9x4\r\n",
+            "Passphrase-Begin: {}"
+        ),
+        passphrase_begin
+    );
+    let pgp_msg = encr.replace("-----BEGIN PGP MESSAGE-----", &replacement);
+
+    let msg_subj = stock_str::ac_setup_msg_subject(context).await;
+    let msg_body = stock_str::ac_setup_msg_body(context).await;
+    let msg_body_html = msg_body.replace('\r', "").replace('\n', "<br>");
+    Ok(format!(
+        concat!(
+            "<!DOCTYPE html>\r\n",
+            "<html>\r\n",
+            "  <head>\r\n",
+            "    <title>{}</title>\r\n",
+            "  </head>\r\n",
+            "  <body>\r\n",
+            "    <h1>{}</h1>\r\n",
+            "    <p>{}</p>\r\n",
+            "    <pre>\r\n{}\r\n</pre>\r\n",
+            "  </body>\r\n",
+            "</html>\r\n"
+        ),
+        msg_subj, msg_subj, msg_body_html, pgp_msg
+    ))
+}
+
+/// Creates a new setup code for Autocrypt Setup Message.
+fn create_setup_code(_context: &Context) -> String {
+    let mut random_val: u16;
+    let mut rng = thread_rng();
+    let mut ret = String::new();
+
+    for i in 0..9 {
+        loop {
+            random_val = rng.gen();
+            if random_val as usize <= 60000 {
+                break;
+            }
+        }
+        random_val = (random_val as usize % 10000) as u16;
+        ret += &format!(
+            "{}{:04}",
+            if 0 != i { "-" } else { "" },
+            random_val as usize
+        );
+    }
+
+    ret
+}
+
+async fn decrypt_setup_file<T: std::io::Read + std::io::Seek>(
+    passphrase: &str,
+    file: T,
+) -> Result<String> {
+    let plain_bytes = pgp::symm_decrypt(passphrase, file).await?;
+    let plain_text = std::string::String::from_utf8(plain_bytes)?;
+
+    Ok(plain_text)
+}
+
+fn normalize_setup_code(s: &str) -> String {
+    let mut out = String::new();
+    for c in s.chars() {
+        if c.is_ascii_digit() {
+            out.push(c);
+            if let 4 | 9 | 14 | 19 | 24 | 29 | 34 | 39 = out.len() {
+                out += "-"
+            }
+        }
+    }
+    out
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    use crate::pgp::{split_armored_data, HEADER_AUTOCRYPT, HEADER_SETUPCODE};
+    use crate::receive_imf::receive_imf;
+    use crate::stock_str::StockMessage;
+    use crate::test_utils::{TestContext, TestContextManager};
+    use ::pgp::armor::BlockType;
+
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_render_setup_file() {
+        let t = TestContext::new_alice().await;
+        let msg = render_setup_file(&t, "hello").await.unwrap();
+        println!("{}", &msg);
+        // Check some substrings, indicating things got substituted.
+        assert!(msg.contains("<title>Autocrypt Setup Message</title"));
+        assert!(msg.contains("<h1>Autocrypt Setup Message</h1>"));
+        assert!(msg.contains("<p>This is the Autocrypt Setup Message used to"));
+        assert!(msg.contains("-----BEGIN PGP MESSAGE-----\r\n"));
+        assert!(msg.contains("Passphrase-Format: numeric9x4\r\n"));
+        assert!(msg.contains("Passphrase-Begin: he\r\n"));
+        assert!(msg.contains("-----END PGP MESSAGE-----\r\n"));
+
+        for line in msg.rsplit_terminator('\n') {
+            assert!(line.ends_with('\r'));
+        }
+    }
+
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_render_setup_file_newline_replace() {
+        let t = TestContext::new_alice().await;
+        t.set_stock_translation(StockMessage::AcSetupMsgBody, "hello\r\nthere".to_string())
+            .await
+            .unwrap();
+        let msg = render_setup_file(&t, "pw").await.unwrap();
+        println!("{}", &msg);
+        assert!(msg.contains("<p>hello<br>there</p>"));
+    }
+
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_create_setup_code() {
+        let t = TestContext::new().await;
+        let setupcode = create_setup_code(&t);
+        assert_eq!(setupcode.len(), 44);
+        assert_eq!(setupcode.chars().nth(4).unwrap(), '-');
+        assert_eq!(setupcode.chars().nth(9).unwrap(), '-');
+        assert_eq!(setupcode.chars().nth(14).unwrap(), '-');
+        assert_eq!(setupcode.chars().nth(19).unwrap(), '-');
+        assert_eq!(setupcode.chars().nth(24).unwrap(), '-');
+        assert_eq!(setupcode.chars().nth(29).unwrap(), '-');
+        assert_eq!(setupcode.chars().nth(34).unwrap(), '-');
+        assert_eq!(setupcode.chars().nth(39).unwrap(), '-');
+    }
+
+    #[test]
+    fn test_normalize_setup_code() {
+        let norm = normalize_setup_code("123422343234423452346234723482349234");
+        assert_eq!(norm, "1234-2234-3234-4234-5234-6234-7234-8234-9234");
+
+        let norm =
+            normalize_setup_code("\t1 2 3422343234- foo bar-- 423-45 2 34 6234723482349234      ");
+        assert_eq!(norm, "1234-2234-3234-4234-5234-6234-7234-8234-9234");
+    }
+
+    /* S_EM_SETUPFILE is a AES-256 symm. encrypted setup message created by Enigmail
+    with an "encrypted session key", see RFC 4880.  The code is in S_EM_SETUPCODE */
+    const S_EM_SETUPCODE: &str = "1742-0185-6197-1303-7016-8412-3581-4441-0597";
+    const S_EM_SETUPFILE: &str = include_str!("../../test-data/message/stress.txt");
+
+    // Autocrypt Setup Message payload "encrypted" with plaintext algorithm.
+    const S_PLAINTEXT_SETUPFILE: &str =
+        include_str!("../../test-data/message/plaintext-autocrypt-setup.txt");
+
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_split_and_decrypt() {
+        let buf_1 = S_EM_SETUPFILE.as_bytes().to_vec();
+        let (typ, headers, base64) = split_armored_data(&buf_1).unwrap();
+        assert_eq!(typ, BlockType::Message);
+        assert!(S_EM_SETUPCODE.starts_with(headers.get(HEADER_SETUPCODE).unwrap()));
+        assert!(!headers.contains_key(HEADER_AUTOCRYPT));
+
+        assert!(!base64.is_empty());
+
+        let setup_file = S_EM_SETUPFILE.to_string();
+        let decrypted =
+            decrypt_setup_file(S_EM_SETUPCODE, std::io::Cursor::new(setup_file.as_bytes()))
+                .await
+                .unwrap();
+
+        let (typ, headers, _base64) = split_armored_data(decrypted.as_bytes()).unwrap();
+
+        assert_eq!(typ, BlockType::PrivateKey);
+        assert_eq!(headers.get(HEADER_AUTOCRYPT), Some(&"mutual".to_string()));
+        assert!(!headers.contains_key(HEADER_SETUPCODE));
+    }
+
+    /// Tests that Autocrypt Setup Message encrypted with "plaintext" algorithm cannot be
+    /// decrypted.
+    ///
+    /// According to <https://datatracker.ietf.org/doc/html/rfc4880#section-13.4>
+    /// "Implementations MUST NOT use plaintext in Symmetrically Encrypted Data packets".
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_decrypt_plaintext_autocrypt_setup_message() {
+        let setup_file = S_PLAINTEXT_SETUPFILE.to_string();
+        let incorrect_setupcode = "0000-0000-0000-0000-0000-0000-0000-0000-0000";
+        assert!(decrypt_setup_file(
+            incorrect_setupcode,
+            std::io::Cursor::new(setup_file.as_bytes()),
+        )
+        .await
+        .is_err());
+    }
+
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_key_transfer() -> Result<()> {
+        let alice = TestContext::new_alice().await;
+
+        let setup_code = initiate_key_transfer(&alice).await?;
+
+        // Get Autocrypt Setup Message.
+        let sent = alice.pop_sent_msg().await;
+
+        // Alice sets up a second device.
+        let alice2 = TestContext::new().await;
+        alice2.set_name("alice2");
+        alice2.configure_addr("alice@example.org").await;
+        alice2.recv_msg(&sent).await;
+        let msg = alice2.get_last_msg().await;
+        assert!(msg.is_setupmessage());
+
+        // Send a message that cannot be decrypted because the keys are
+        // not synchronized yet.
+        let sent = alice2.send_text(msg.chat_id, "Test").await;
+        let trashed_message = alice.recv_msg_opt(&sent).await;
+        assert!(trashed_message.is_none());
+        assert_ne!(alice.get_last_msg().await.get_text(), "Test");
+
+        // Transfer the key.
+        continue_key_transfer(&alice2, msg.id, &setup_code).await?;
+
+        // Alice sends a message to self from the new device.
+        let sent = alice2.send_text(msg.chat_id, "Test").await;
+        alice.recv_msg(&sent).await;
+        assert_eq!(alice.get_last_msg().await.get_text(), "Test");
+
+        Ok(())
+    }
+
+    /// Tests that Autocrypt Setup Messages is only clickable if it is self-sent.
+    /// This prevents Bob from tricking Alice into changing the key
+    /// by sending her an Autocrypt Setup Message as long as Alice's server
+    /// does not allow to forge the `From:` header.
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_key_transfer_non_self_sent() -> Result<()> {
+        let mut tcm = TestContextManager::new();
+        let alice = tcm.alice().await;
+        let bob = tcm.bob().await;
+
+        let _setup_code = initiate_key_transfer(&alice).await?;
+
+        // Get Autocrypt Setup Message.
+        let sent = alice.pop_sent_msg().await;
+
+        let rcvd = bob.recv_msg(&sent).await;
+        assert!(!rcvd.is_setupmessage());
+
+        Ok(())
+    }
+
+    /// Tests reception of Autocrypt Setup Message from K-9 6.802.
+    ///
+    /// Unlike Autocrypt Setup Message sent by Delta Chat,
+    /// this message does not contain `Autocrypt-Prefer-Encrypt` header.
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_key_transfer_k_9() -> Result<()> {
+        let t = &TestContext::new().await;
+        t.configure_addr("autocrypt@nine.testrun.org").await;
+
+        let raw = include_bytes!("../../test-data/message/k-9-autocrypt-setup-message.eml");
+        let received = receive_imf(t, raw, false).await?.unwrap();
+
+        let setup_code = "0655-9868-8252-5455-4232-5158-1237-5333-2638";
+        continue_key_transfer(t, *received.msg_ids.last().unwrap(), setup_code).await?;
+
+        Ok(())
+    }
+}

src/imex/transfer.rs

@@ -1,17 +1,12 @@
 //! Transfer a backup to an other device.
 //!
-//! This module provides support for using n0's iroh tool to initiate transfer of a backup
-//! to another device using a QR code.
-//!
-//! Using the iroh terminology there are two parties to this:
+//! This module provides support for using [iroh](https://iroh.computer/)
+//! to initiate transfer of a backup to another device using a QR code.
 //!
+//! There are two parties to this:
 //! - The *Provider*, which starts a server and listens for connections.
 //! - The *Getter*, which connects to the server and retrieves the data.
 //!
-//! Iroh is designed around the idea of verifying hashes, the downloads are verified as
-//! they are retrieved.  The entire transfer is initiated by requesting the data of a single
-//! root hash.
-//!
 //! Both the provider and the getter are authenticated:
 //!
 //! - The provider is known by its *peer ID*.
@@ -21,24 +16,30 @@
 //! Both these are transferred in the QR code offered to the getter.  This ensures that the
 //! getter can not connect to an impersonated provider and the provider does not offer the
 //! download to an impersonated getter.
+//!
+//! Protocol starts by getter opening a bidirectional QUIC stream
+//! to the provider and sending authentication token.
+//! Provider verifies received authentication token,
+//! sends the size of all files in a backup (database and all blobs)
+//! as an unsigned 64-bit big endian integer and streams the backup in tar format.
+//! Getter receives the backup and acknowledges successful reception
+//! by sending a single byte.
+//! Provider closes the endpoint after receiving an acknowledgment.
 
 use std::future::Future;
-use std::net::Ipv4Addr;
-use std::ops::Deref;
-use std::path::{Path, PathBuf};
 use std::pin::Pin;
+use std::sync::Arc;
 use std::task::Poll;
 
 use anyhow::{anyhow, bail, ensure, format_err, Context as _, Result};
-use async_channel::Receiver;
 use futures_lite::StreamExt;
-use iroh::blobs::Collection;
-use iroh::get::DataStream;
-use iroh::progress::ProgressEmitter;
-use iroh::protocol::AuthToken;
-use iroh::provider::{DataSource, Event, Provider, Ticket};
-use iroh::Hash;
-use iroh_old as iroh;
+use iroh_net::relay::RelayMode;
+use iroh_net::Endpoint;
+use iroh_old;
+use iroh_old::blobs::Collection;
+use iroh_old::get::DataStream;
+use iroh_old::progress::ProgressEmitter;
+use iroh_old::provider::Ticket;
 use tokio::fs::{self, File};
 use tokio::io::{self, AsyncWriteExt, BufWriter};
 use tokio::sync::broadcast::error::RecvError;
@@ -47,19 +48,22 @@ use tokio::task::{JoinHandle, JoinSet};
 use tokio_stream::wrappers::ReadDirStream;
 use tokio_util::sync::CancellationToken;
 
-use crate::blob::BlobDirContents;
 use crate::chat::{add_device_msg, delete_and_reset_all_device_msgs};
 use crate::context::Context;
+use crate::imex::BlobDirContents;
 use crate::message::{Message, Viewtype};
 use crate::qr::{self, Qr};
 use crate::stock_str::backup_transfer_msg_body;
-use crate::tools::time;
-use crate::{e2ee, EventType};
+use crate::tools::{create_id, time, TempPathGuard};
+use crate::EventType;
 
-use super::{export_database, DBFILE_BACKUP_NAME};
+use super::{export_backup_stream, export_database, import_backup_stream, DBFILE_BACKUP_NAME};
 
 const MAX_CONCURRENT_DIALS: u8 = 16;
 
+/// ALPN protocol identifier for the backup transfer protocol.
+const BACKUP_ALPN: &[u8] = b"/deltachat/backup";
+
 /// Provide or send a backup of this device.
 ///
 /// This creates a backup of the current device and starts a service which offers another
@@ -70,15 +74,21 @@ const MAX_CONCURRENT_DIALS: u8 = 16;
 ///
 /// This starts a task which acquires the global "ongoing" mutex.  If you need to stop the
 /// task use the [`Context::stop_ongoing`] mechanism.
-///
-/// The task implements [`Future`] and awaiting it will complete once a transfer has been
-/// either completed or aborted.
 #[derive(Debug)]
 pub struct BackupProvider {
-    /// The supervisor task, run by [`BackupProvider::watch_provider`].
+    /// iroh-net endpoint.
+    _endpoint: Endpoint,
+
+    /// iroh-net address.
+    node_addr: iroh_net::NodeAddr,
+
+    /// Authentication token that should be submitted
+    /// to retrieve the backup.
+    auth_token: String,
+
+    /// Handle for the task accepting backup transfer requests.
     handle: JoinHandle<Result<()>>,
-    /// The ticket to retrieve the backup collection.
-    ticket: Ticket,
+
     /// Guard to cancel the provider on drop.
     _drop_guard: tokio_util::sync::DropGuard,
 }
@@ -95,9 +105,13 @@ impl BackupProvider {
     ///
     /// [`Accounts::stop_io`]: crate::accounts::Accounts::stop_io
     pub async fn prepare(context: &Context) -> Result<Self> {
-        e2ee::ensure_secret_key_exists(context)
-            .await
-            .context("Private key not available, aborting backup export")?;
+        let relay_mode = RelayMode::Disabled;
+        let endpoint = Endpoint::builder()
+            .alpns(vec![BACKUP_ALPN.to_vec()])
+            .relay_mode(relay_mode)
+            .bind(0)
+            .await?;
+        let node_addr = endpoint.node_addr().await?;
 
         // Acquire global "ongoing" mutex.
         let cancel_token = context.alloc_ongoing().await?;
@@ -105,195 +119,153 @@ impl BackupProvider {
         let context_dir = context
             .get_blobdir()
             .parent()
-            .ok_or_else(|| anyhow!("Context dir not found"))?;
+            .context("Context dir not found")?;
         let dbfile = context_dir.join(DBFILE_BACKUP_NAME);
         if fs::metadata(&dbfile).await.is_ok() {
             fs::remove_file(&dbfile).await?;
             warn!(context, "Previous database export deleted");
         }
         let dbfile = TempPathGuard::new(dbfile);
-        let res = tokio::select! {
-            biased;
-            res = Self::prepare_inner(context, &dbfile) => {
-                match res {
-                    Ok(slf) => Ok(slf),
-                    Err(err) => {
-                        error!(context, "Failed to set up second device setup: {:#}", err);
-                        Err(err)
-                    },
-                }
-            },
-            _ = cancel_token.recv() => Err(format_err!("cancelled")),
-        };
-        let (provider, ticket) = match res {
-            Ok((provider, ticket)) => (provider, ticket),
-            Err(err) => {
-                context.free_ongoing().await;
-                return Err(err);
-            }
-        };
+
+        // Authentication token that receiver should send us to receive a backup.
+        let auth_token = create_id();
+
+        let passphrase = String::new();
+
+        export_database(context, &dbfile, passphrase, time())
+            .await
+            .context("Database export failed")?;
+        context.emit_event(EventType::ImexProgress(300));
+
         let drop_token = CancellationToken::new();
         let handle = {
             let context = context.clone();
             let drop_token = drop_token.clone();
+            let endpoint = endpoint.clone();
+            let auth_token = auth_token.clone();
             tokio::spawn(async move {
-                let res = Self::watch_provider(&context, provider, cancel_token, drop_token).await;
+                Self::accept_loop(
+                    context.clone(),
+                    endpoint,
+                    auth_token,
+                    cancel_token,
+                    drop_token,
+                    dbfile,
+                )
+                .await;
+                info!(context, "Finished accept loop.");
+
                 context.free_ongoing().await;
 
                 // Explicit drop to move the guards into this future
                 drop(paused_guard);
-                drop(dbfile);
-                res
+                Ok(())
             })
         };
         Ok(Self {
+            _endpoint: endpoint,
+            node_addr,
+            auth_token,
             handle,
-            ticket,
             _drop_guard: drop_token.drop_guard(),
         })
     }
 
-    /// Creates the provider task.
-    ///
-    /// Having this as a function makes it easier to cancel it when needed.
-    async fn prepare_inner(context: &Context, dbfile: &Path) -> Result<(Provider, Ticket)> {
-        // Generate the token up front: we also use it to encrypt the database.
-        let token = AuthToken::generate();
-        context.emit_event(SendProgress::Started.into());
-        export_database(context, dbfile, token.to_string(), time())
-            .await
-            .context("Database export failed")?;
-        context.emit_event(SendProgress::DatabaseExported.into());
+    async fn handle_connection(
+        context: Context,
+        conn: iroh_net::endpoint::Connecting,
+        auth_token: String,
+        dbfile: Arc<TempPathGuard>,
+    ) -> Result<()> {
+        let conn = conn.await?;
+        let (mut send_stream, mut recv_stream) = conn.accept_bi().await?;
 
-        // Now we can be sure IO is not running.
-        let mut files = vec![DataSource::with_name(
-            dbfile.to_owned(),
-            format!("db/{DBFILE_BACKUP_NAME}"),
-        )];
-        let blobdir = BlobDirContents::new(context).await?;
-        for blob in blobdir.iter() {
-            let path = blob.to_abs_path();
-            let name = format!("blob/{}", blob.as_file_name());
-            files.push(DataSource::with_name(path, name));
+        // Read authentication token from the stream.
+        let mut received_auth_token = vec![0u8; auth_token.len()];
+        recv_stream.read_exact(&mut received_auth_token).await?;
+        if received_auth_token.as_slice() != auth_token.as_bytes() {
+            warn!(context, "Received wrong backup authentication token.");
+            return Ok(());
         }
 
-        // Start listening.
-        let (db, hash) = iroh::provider::create_collection(files).await?;
-        context.emit_event(SendProgress::CollectionCreated.into());
-        let provider = Provider::builder(db)
-            .bind_addr((Ipv4Addr::UNSPECIFIED, 0).into())
-            .auth_token(token)
-            .spawn()?;
-        context.emit_event(SendProgress::ProviderListening.into());
-        info!(context, "Waiting for remote to connect");
-        let ticket = provider.ticket(hash)?;
-        Ok((provider, ticket))
+        info!(context, "Received valid backup authentication token.");
+
+        let blobdir = BlobDirContents::new(&context).await?;
+
+        let mut file_size = 0;
+        file_size += dbfile.metadata()?.len();
+        for blob in blobdir.iter() {
+            file_size += blob.to_abs_path().metadata()?.len()
+        }
+
+        send_stream.write_all(&file_size.to_be_bytes()).await?;
+
+        export_backup_stream(&context, &dbfile, blobdir, send_stream)
+            .await
+            .context("Failed to write backup into QUIC stream")?;
+        info!(context, "Finished writing backup into QUIC stream.");
+        let mut buf = [0u8; 1];
+        info!(context, "Waiting for acknowledgment.");
+        recv_stream.read_exact(&mut buf).await?;
+        info!(context, "Received backup reception acknowledgement.");
+        context.emit_event(EventType::ImexProgress(1000));
+
+        let mut msg = Message::new(Viewtype::Text);
+        msg.text = backup_transfer_msg_body(&context).await;
+        add_device_msg(&context, None, Some(&mut msg)).await?;
+
+        Ok(())
     }
 
-    /// Supervises the iroh [`Provider`], terminating it when needed.
-    ///
-    /// This will watch the provider and terminate it when:
-    ///
-    /// - A transfer is completed, successful or unsuccessful.
-    /// - An event could not be observed to protect against not knowing of a completed event.
-    /// - The ongoing process is cancelled.
-    ///
-    /// The *cancel_token* is the handle for the ongoing process mutex, when this completes
-    /// we must cancel this operation.
-    async fn watch_provider(
-        context: &Context,
-        mut provider: Provider,
-        cancel_token: Receiver<()>,
+    async fn accept_loop(
+        context: Context,
+        endpoint: Endpoint,
+        auth_token: String,
+        cancel_token: async_channel::Receiver<()>,
         drop_token: CancellationToken,
-    ) -> Result<()> {
-        let mut events = provider.subscribe();
-        let mut total_size = 0;
-        let mut current_size = 0;
-        let res = loop {
+        dbfile: TempPathGuard,
+    ) {
+        let dbfile = Arc::new(dbfile);
+        loop {
             tokio::select! {
                 biased;
-                res = &mut provider => {
-                    break res.context("BackupProvider failed");
-                },
-                maybe_event = events.recv() => {
-                    match maybe_event {
-                        Ok(event) => {
-                            match event {
-                                Event::ClientConnected { ..} => {
-                                    context.emit_event(SendProgress::ClientConnected.into());
-                                }
-                                Event::RequestReceived { .. } => {
-                                }
-                                Event::TransferCollectionStarted { total_blobs_size, .. } => {
-                                    total_size = total_blobs_size;
-                                    context.emit_event(SendProgress::TransferInProgress {
-                                        current_size,
-                                        total_size,
-                                    }.into());
-                                }
-                                Event::TransferBlobCompleted { size, .. } => {
-                                    current_size += size;
-                                    context.emit_event(SendProgress::TransferInProgress {
-                                        current_size,
-                                        total_size,
-                                    }.into());
-                                }
-                                Event::TransferCollectionCompleted { .. } => {
-                                    context.emit_event(SendProgress::TransferInProgress {
-                                        current_size: total_size,
-                                        total_size
-                                    }.into());
-                                    provider.shutdown();
-                                }
-                                Event::TransferAborted { .. } => {
-                                    provider.shutdown();
-                                    break Err(anyhow!("BackupProvider transfer aborted"));
-                                }
-                            }
-                        }
-                        Err(broadcast::error::RecvError::Closed) => {
-                            // We should never see this, provider.join() should complete
-                            // first.
-                        }
-                        Err(broadcast::error::RecvError::Lagged(_)) => {
-                            // We really shouldn't be lagging, if we did we may have missed
-                            // a completion event.
-                            provider.shutdown();
-                            break Err(anyhow!("Missed events from BackupProvider"));
+
+                conn = endpoint.accept() => {
+                    if let Some(conn) = conn {
+                        // Got a new in-progress connection.
+                        let context = context.clone();
+                        let auth_token = auth_token.clone();
+                        let dbfile = dbfile.clone();
+                        if let Err(err) = Self::handle_connection(context.clone(), conn, auth_token, dbfile).await {
+                            warn!(context, "Error while handling backup connection: {err:#}.");
+                        } else {
+                            info!(context, "Backup transfer finished successfully.");
+                            break;
                         }
+                    } else {
+                        break;
                     }
                 },
                 _ = cancel_token.recv() => {
-                    provider.shutdown();
-                    break Err(anyhow!("BackupProvider cancelled"));
-                },
+                    context.emit_event(EventType::ImexProgress(0));
+                    break;
+                }
                 _ = drop_token.cancelled() => {
-                    provider.shutdown();
-                    break Err(anyhow!("BackupProvider dropped"));
+                    context.emit_event(EventType::ImexProgress(0));
+                    break;
                 }
             }
-        };
-        match &res {
-            Ok(_) => {
-                context.emit_event(SendProgress::Completed.into());
-                let mut msg = Message::new(Viewtype::Text);
-                msg.text = backup_transfer_msg_body(context).await;
-                add_device_msg(context, None, Some(&mut msg)).await?;
-            }
-            Err(err) => {
-                error!(context, "Backup transfer failure: {err:#}");
-                context.emit_event(SendProgress::Failed.into())
-            }
         }
-        res
     }
 
     /// Returns a QR code that allows fetching this backup.
     ///
     /// This QR code can be passed to [`get_backup`] on a (different) device.
     pub fn qr(&self) -> Qr {
-        Qr::Backup {
-            ticket: self.ticket.clone(),
+        Qr::Backup2 {
+            node_addr: self.node_addr.clone(),
+
+            auth_token: self.auth_token.clone(),
         }
     }
 }
@@ -301,92 +273,14 @@ impl BackupProvider {
 impl Future for BackupProvider {
     type Output = Result<()>;
 
+    /// Waits for the backup transfer to complete.
     fn poll(mut self: Pin<&mut Self>, cx: &mut std::task::Context<'_>) -> Poll<Self::Output> {
         Pin::new(&mut self.handle).poll(cx)?
     }
 }
 
-/// A guard which will remove the path when dropped.
-///
-/// It implements [`Deref`] it it can be used as a `&Path`.
-#[derive(Debug)]
-struct TempPathGuard {
-    path: PathBuf,
-}
-
-impl TempPathGuard {
-    fn new(path: PathBuf) -> Self {
-        Self { path }
-    }
-}
-
-impl Drop for TempPathGuard {
-    fn drop(&mut self) {
-        let path = self.path.clone();
-        tokio::spawn(async move {
-            fs::remove_file(&path).await.ok();
-        });
-    }
-}
-
-impl Deref for TempPathGuard {
-    type Target = Path;
-
-    fn deref(&self) -> &Self::Target {
-        &self.path
-    }
-}
-
-/// Create [`EventType::ImexProgress`] events using readable names.
-///
-/// Plus you get warnings if you don't use all variants.
-#[derive(Debug)]
-enum SendProgress {
-    Failed,
-    Started,
-    DatabaseExported,
-    CollectionCreated,
-    ProviderListening,
-    ClientConnected,
-    TransferInProgress { current_size: u64, total_size: u64 },
-    Completed,
-}
-
-impl From<SendProgress> for EventType {
-    fn from(source: SendProgress) -> Self {
-        use SendProgress::*;
-        let num: u16 = match source {
-            Failed => 0,
-            Started => 100,
-            DatabaseExported => 300,
-            CollectionCreated => 350,
-            ProviderListening => 400,
-            ClientConnected => 450,
-            TransferInProgress {
-                current_size,
-                total_size,
-            } => {
-                // the range is 450..=950
-                450 + ((current_size as f64 / total_size as f64) * 500.).floor() as u16
-            }
-            Completed => 1000,
-        };
-        Self::ImexProgress(num.into())
-    }
-}
-
-/// Contacts a backup provider and receives the backup from it.
-///
-/// This uses a QR code to contact another instance of deltachat which is providing a backup
-/// using the [`BackupProvider`].  Once connected it will authenticate using the secrets in
-/// the QR code and retrieve the backup.
-///
-/// This is a long running operation which will only when completed.
-///
-/// Using [`Qr`] as argument is a bit odd as it only accepts one specific variant of it.  It
-/// does avoid having [`iroh::provider::Ticket`] in the primary API however, without
-/// having to revert to untyped bytes.
-pub async fn get_backup(context: &Context, qr: Qr) -> Result<()> {
+/// Retrieves backup from a legacy backup provider using iroh 0.4.
+pub async fn get_legacy_backup(context: &Context, qr: Qr) -> Result<()> {
     ensure!(
         matches!(qr, Qr::Backup { .. }),
         "QR code for backup must be of type DCBACKUP"
@@ -412,6 +306,64 @@ pub async fn get_backup(context: &Context, qr: Qr) -> Result<()> {
     res
 }
 
+pub async fn get_backup2(
+    context: &Context,
+    node_addr: iroh_net::NodeAddr,
+    auth_token: String,
+) -> Result<()> {
+    let relay_mode = RelayMode::Disabled;
+
+    let endpoint = Endpoint::builder().relay_mode(relay_mode).bind(0).await?;
+
+    let conn = endpoint.connect(node_addr, BACKUP_ALPN).await?;
+    let (mut send_stream, mut recv_stream) = conn.open_bi().await?;
+    info!(context, "Sending backup authentication token.");
+    send_stream.write_all(auth_token.as_bytes()).await?;
+
+    let passphrase = String::new();
+    info!(context, "Starting to read backup from the stream.");
+
+    let mut file_size_buf = [0u8; 8];
+    recv_stream.read_exact(&mut file_size_buf).await?;
+    let file_size = u64::from_be_bytes(file_size_buf);
+    import_backup_stream(context, recv_stream, file_size, passphrase)
+        .await
+        .context("Failed to import backup from QUIC stream")?;
+    info!(context, "Finished importing backup from the stream.");
+    context.emit_event(EventType::ImexProgress(1000));
+
+    // Send an acknowledgement, but ignore the errors.
+    // We have imported backup successfully already.
+    send_stream.write_all(b".").await.ok();
+    send_stream.finish().await.ok();
+    info!(context, "Sent backup reception acknowledgment.");
+
+    Ok(())
+}
+
+/// Contacts a backup provider and receives the backup from it.
+///
+/// This uses a QR code to contact another instance of deltachat which is providing a backup
+/// using the [`BackupProvider`].  Once connected it will authenticate using the secrets in
+/// the QR code and retrieve the backup.
+///
+/// This is a long running operation which will return only when completed.
+///
+/// Using [`Qr`] as argument is a bit odd as it only accepts specific variants of it.  It
+/// does avoid having [`iroh_old::provider::Ticket`] in the primary API however, without
+/// having to revert to untyped bytes.
+pub async fn get_backup(context: &Context, qr: Qr) -> Result<()> {
+    match qr {
+        Qr::Backup { .. } => get_legacy_backup(context, qr).await?,
+        Qr::Backup2 {
+            node_addr,
+            auth_token,
+        } => get_backup2(context, node_addr, auth_token).await?,
+        _ => bail!("QR code for backup must be of type DCBACKUP or DCBACKUP2"),
+    }
+    Ok(())
+}
+
 async fn get_backup_inner(context: &Context, qr: Qr) -> Result<()> {
     let ticket = match qr {
         Qr::Backup { ticket } => ticket,
@@ -458,7 +410,7 @@ async fn transfer_from_provider(context: &Context, ticket: &Ticket) -> Result<()
 
     // Perform the transfer.
     let keylog = false; // Do not enable rustls SSLKEYLOGFILE env var functionality
-    let stats = iroh::get::run_ticket(
+    let stats = iroh_old::get::run_ticket(
         ticket,
         keylog,
         MAX_CONCURRENT_DIALS,
@@ -490,7 +442,7 @@ async fn on_blob(
     progress: &ProgressEmitter,
     jobs: &Mutex<JoinSet<()>>,
     ticket: &Ticket,
-    _hash: Hash,
+    _hash: iroh_old::Hash,
     mut reader: DataStream,
     name: String,
 ) -> Result<DataStream> {
@@ -672,24 +624,6 @@ mod tests {
             .await;
     }
 
-    #[test]
-    fn test_send_progress() {
-        let cases = [
-            ((0, 100), 450),
-            ((10, 100), 500),
-            ((50, 100), 700),
-            ((100, 100), 950),
-        ];
-
-        for ((current_size, total_size), progress) in cases {
-            let out = EventType::from(SendProgress::TransferInProgress {
-                current_size,
-                total_size,
-            });
-            assert_eq!(out, EventType::ImexProgress(progress));
-        }
-    }
-
     #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
     async fn test_drop_provider() {
         let mut tcm = TestContextManager::new();

src/key.rs

@@ -4,7 +4,7 @@ use std::collections::BTreeMap;
 use std::fmt;
 use std::io::Cursor;
 
-use anyhow::{ensure, Context as _, Result};
+use anyhow::{bail, ensure, Context as _, Result};
 use base64::Engine as _;
 use deltachat_contact_tools::EmailAddress;
 use num_traits::FromPrimitive;
@@ -46,7 +46,14 @@ pub(crate) trait DcKey: Serialize + Deserializable + KeyTrait + Clone {
     /// the ASCII-armored representation.
     fn from_asc(data: &str) -> Result<(Self, BTreeMap<String, String>)> {
         let bytes = data.as_bytes();
-        let (key, headers) = Self::from_armor_single(Cursor::new(bytes)).context("rPGP error")?;
+        let res = Self::from_armor_single(Cursor::new(bytes));
+        let (key, headers) = match res {
+            Err(pgp::errors::Error::NoMatchingPacket) => match Self::is_private() {
+                true => bail!("No private key packet found"),
+                false => bail!("No public key packet found"),
+            },
+            _ => res.context("rPGP error")?,
+        };
         let headers = headers
             .into_iter()
             .map(|(key, values)| {
@@ -89,6 +96,8 @@ pub(crate) trait DcKey: Serialize + Deserializable + KeyTrait + Clone {
     fn fingerprint(&self) -> Fingerprint {
         Fingerprint::new(KeyTrait::fingerprint(self))
     }
+
+    fn is_private() -> bool;
 }
 
 pub(crate) async fn load_self_public_key(context: &Context) -> Result<SignedPublicKey> {
@@ -187,6 +196,10 @@ impl DcKey for SignedPublicKey {
             .unwrap_or_default();
         std::string::String::from_utf8(buf).unwrap_or_default()
     }
+
+    fn is_private() -> bool {
+        false
+    }
 }
 
 impl DcKey for SignedSecretKey {
@@ -202,6 +215,10 @@ impl DcKey for SignedSecretKey {
             .unwrap_or_default();
         std::string::String::from_utf8(buf).unwrap_or_default()
     }
+
+    fn is_private() -> bool {
+        true
+    }
 }
 
 /// Deltachat extension trait for secret keys.

src/login_param.rs

@@ -2,7 +2,7 @@
 
 use std::fmt;
 
-use anyhow::{ensure, Result};
+use anyhow::{ensure, Context as _, Result};
 
 use crate::constants::{DC_LP_AUTH_FLAGS, DC_LP_AUTH_NORMAL, DC_LP_AUTH_OAUTH2};
 use crate::context::Context;
@@ -10,7 +10,7 @@ use crate::provider::Socket;
 use crate::provider::{get_provider_by_id, Provider};
 use crate::socks::Socks5Config;
 
-#[derive(Copy, Clone, Debug, Display, FromPrimitive, ToPrimitive, PartialEq, Eq)]
+#[derive(Copy, Clone, Debug, Default, Display, FromPrimitive, ToPrimitive, PartialEq, Eq)]
 #[repr(u32)]
 #[strum(serialize_all = "snake_case")]
 pub enum CertificateChecks {
@@ -30,6 +30,7 @@ pub enum CertificateChecks {
     /// means that provider database setting should be taken.
     /// If there is no provider database setting for certificate checks,
     /// `Automatic` is the same as `Strict`.
+    #[default]
     Automatic = 0,
 
     Strict = 1,
@@ -41,12 +42,6 @@ pub enum CertificateChecks {
     AcceptInvalidCertificates = 3,
 }
 
-impl Default for CertificateChecks {
-    fn default() -> Self {
-        Self::Automatic
-    }
-}
-
 /// Login parameters for a single server, either IMAP or SMTP
 #[derive(Default, Debug, Clone, PartialEq, Eq)]
 pub struct ServerLoginParam {
@@ -56,10 +51,6 @@ pub struct ServerLoginParam {
     pub port: u16,
     pub security: Socket,
     pub oauth2: bool,
-
-    /// TLS options: whether to allow invalid certificates and/or
-    /// invalid hostnames
-    pub certificate_checks: CertificateChecks,
 }
 
 #[derive(Default, Debug, Clone, PartialEq, Eq)]
@@ -69,6 +60,10 @@ pub struct LoginParam {
     pub smtp: ServerLoginParam,
     pub provider: Option<&'static Provider>,
     pub socks5_config: Option<Socks5Config>,
+
+    /// TLS options: whether to allow invalid certificates and/or
+    /// invalid hostnames
+    pub certificate_checks: CertificateChecks,
 }
 
 impl LoginParam {
@@ -130,10 +125,15 @@ impl LoginParam {
             .and_then(num_traits::FromPrimitive::from_i32)
             .unwrap_or_default();
 
+        // The setting is named `imap_certificate_checks`
+        // for backwards compatibility,
+        // but now it is a global setting applied to all protocols,
+        // while `smtp_certificate_checks` is ignored.
         let key = &format!("{prefix}imap_certificate_checks");
-        let imap_certificate_checks =
+        let certificate_checks =
             if let Some(certificate_checks) = sql.get_raw_config_int(key).await? {
-                num_traits::FromPrimitive::from_i32(certificate_checks).unwrap()
+                num_traits::FromPrimitive::from_i32(certificate_checks)
+                    .with_context(|| format!("Invalid {key} value"))?
             } else {
                 Default::default()
             };
@@ -157,14 +157,6 @@ impl LoginParam {
             .and_then(num_traits::FromPrimitive::from_i32)
             .unwrap_or_default();
 
-        let key = &format!("{prefix}smtp_certificate_checks");
-        let smtp_certificate_checks =
-            if let Some(certificate_checks) = sql.get_raw_config_int(key).await? {
-                num_traits::FromPrimitive::from_i32(certificate_checks).unwrap_or_default()
-            } else {
-                Default::default()
-            };
-
         let key = &format!("{prefix}server_flags");
         let server_flags = sql.get_raw_config_int(key).await?.unwrap_or_default();
         let oauth2 = matches!(server_flags & DC_LP_AUTH_FLAGS, DC_LP_AUTH_OAUTH2);
@@ -186,7 +178,6 @@ impl LoginParam {
                 port: mail_port as u16,
                 security: mail_security,
                 oauth2,
-                certificate_checks: imap_certificate_checks,
             },
             smtp: ServerLoginParam {
                 server: send_server,
@@ -195,8 +186,8 @@ impl LoginParam {
                 port: send_port as u16,
                 security: send_security,
                 oauth2,
-                certificate_checks: smtp_certificate_checks,
             },
+            certificate_checks,
             provider,
             socks5_config,
         })
@@ -227,7 +218,7 @@ impl LoginParam {
             .await?;
 
         let key = &format!("{prefix}imap_certificate_checks");
-        sql.set_raw_config_int(key, self.imap.certificate_checks as i32)
+        sql.set_raw_config_int(key, self.certificate_checks as i32)
             .await?;
 
         let key = &format!("{prefix}send_server");
@@ -247,8 +238,9 @@ impl LoginParam {
         sql.set_raw_config_int(key, self.smtp.security as i32)
             .await?;
 
+        // This is only saved for compatibility reasons, but never loaded.
         let key = &format!("{prefix}smtp_certificate_checks");
-        sql.set_raw_config_int(key, self.smtp.certificate_checks as i32)
+        sql.set_raw_config_int(key, self.certificate_checks as i32)
             .await?;
 
         // The OAuth2 flag is either set for both IMAP and SMTP or not at all.
@@ -259,13 +251,25 @@ impl LoginParam {
         };
         sql.set_raw_config_int(key, server_flags).await?;
 
-        if let Some(provider) = self.provider {
-            let key = &format!("{prefix}provider");
-            sql.set_raw_config(key, Some(provider.id)).await?;
-        }
+        let key = &format!("{prefix}provider");
+        sql.set_raw_config(key, self.provider.map(|provider| provider.id))
+            .await?;
 
         Ok(())
     }
+
+    pub fn strict_tls(&self) -> bool {
+        let user_strict_tls = match self.certificate_checks {
+            CertificateChecks::Automatic => None,
+            CertificateChecks::Strict => Some(true),
+            CertificateChecks::AcceptInvalidCertificates
+            | CertificateChecks::AcceptInvalidCertificates2 => Some(false),
+        };
+        let provider_strict_tls = self.provider.map(|provider| provider.opt.strict_tls);
+        user_strict_tls
+            .or(provider_strict_tls)
+            .unwrap_or(self.socks5_config.is_some())
+    }
 }
 
 impl fmt::Display for LoginParam {
@@ -275,7 +279,7 @@ impl fmt::Display for LoginParam {
 
         write!(
             f,
-            "{} imap:{}:{}:{}:{}:{}:cert_{}:{} smtp:{}:{}:{}:{}:{}:cert_{}:{}",
+            "{} imap:{}:{}:{}:{}:{}:{} smtp:{}:{}:{}:{}:{}:{} cert_{}",
             unset_empty(&self.addr),
             unset_empty(&self.imap.user),
             if !self.imap.password.is_empty() {
@@ -286,7 +290,6 @@ impl fmt::Display for LoginParam {
             unset_empty(&self.imap.server),
             self.imap.port,
             self.imap.security,
-            self.imap.certificate_checks,
             if self.imap.oauth2 {
                 "OAUTH2"
             } else {
@@ -301,12 +304,12 @@ impl fmt::Display for LoginParam {
             unset_empty(&self.smtp.server),
             self.smtp.port,
             self.smtp.security,
-            self.smtp.certificate_checks,
             if self.smtp.oauth2 {
                 "OAUTH2"
             } else {
                 "AUTH_NORMAL"
             },
+            self.certificate_checks
         )
     }
 }
@@ -347,7 +350,6 @@ mod tests {
                 port: 123,
                 security: Socket::Starttls,
                 oauth2: false,
-                certificate_checks: CertificateChecks::Strict,
             },
             smtp: ServerLoginParam {
                 server: "smtp.example.com".to_string(),
@@ -356,16 +358,24 @@ mod tests {
                 port: 456,
                 security: Socket::Ssl,
                 oauth2: false,
-                certificate_checks: CertificateChecks::AcceptInvalidCertificates,
             },
             provider: get_provider_by_id("example.com"),
             // socks5_config is not saved by `save_to_database`, using default value
             socks5_config: None,
+            certificate_checks: CertificateChecks::Strict,
         };
 
         param.save_as_configured_params(&t).await?;
         let loaded = LoginParam::load_configured_params(&t).await?;
+        assert_eq!(param, loaded);
 
+        // Remove provider.
+        let param = LoginParam {
+            provider: None,
+            ..param
+        };
+        param.save_as_configured_params(&t).await?;
+        let loaded = LoginParam::load_configured_params(&t).await?;
         assert_eq!(param, loaded);
         Ok(())
     }

src/message.rs

@@ -11,7 +11,7 @@ use serde::{Deserialize, Serialize};
 use tokio::{fs, io};
 
 use crate::blob::BlobObject;
-use crate::chat::{Chat, ChatId, ChatIdBlocked};
+use crate::chat::{Chat, ChatId, ChatIdBlocked, ChatVisibility};
 use crate::chatlist_events;
 use crate::config::Config;
 use crate::constants::{
@@ -81,7 +81,20 @@ impl MsgId {
     pub async fn get_state(self, context: &Context) -> Result<MessageState> {
         let result = context
             .sql
-            .query_get_value("SELECT state FROM msgs WHERE id=?", (self,))
+            .query_row_optional(
+                concat!(
+                    "SELECT m.state, mdns.msg_id",
+                    " FROM msgs m LEFT JOIN msgs_mdns mdns ON mdns.msg_id=m.id",
+                    " WHERE id=?",
+                    " LIMIT 1",
+                ),
+                (self,),
+                |row| {
+                    let state: MessageState = row.get(0)?;
+                    let mdn_msg_id: Option<MsgId> = row.get(1)?;
+                    Ok(state.with_mdns(mdn_msg_id.is_some()))
+                },
+            )
             .await?
             .unwrap_or_default();
         Ok(result)
@@ -519,6 +532,7 @@ impl Message {
                     "    m.ephemeral_timestamp AS ephemeral_timestamp,",
                     "    m.type AS type,",
                     "    m.state AS state,",
+                    "    mdns.msg_id AS mdn_msg_id,",
                     "    m.download_state AS download_state,",
                     "    m.error AS error,",
                     "    m.msgrmsg AS msgrmsg,",
@@ -529,11 +543,16 @@ impl Message {
                     "    m.hidden AS hidden,",
                     "    m.location_id AS location,",
                     "    c.blocked AS blocked",
-                    " FROM msgs m LEFT JOIN chats c ON c.id=m.chat_id",
-                    " WHERE m.id=? AND chat_id!=3;"
+                    " FROM msgs m",
+                    " LEFT JOIN chats c ON c.id=m.chat_id",
+                    " LEFT JOIN msgs_mdns mdns ON mdns.msg_id=m.id",
+                    " WHERE m.id=? AND chat_id!=3",
+                    " LIMIT 1",
                 ),
                 (id,),
                 |row| {
+                    let state: MessageState = row.get("state")?;
+                    let mdn_msg_id: Option<MsgId> = row.get("mdn_msg_id")?;
                     let text = match row.get_ref("txt")? {
                         rusqlite::types::ValueRef::Text(buf) => {
                             match String::from_utf8(buf.to_vec()) {
@@ -568,7 +587,7 @@ impl Message {
                         ephemeral_timer: row.get("ephemeral_timer")?,
                         ephemeral_timestamp: row.get("ephemeral_timestamp")?,
                         viewtype: row.get("type")?,
-                        state: row.get("state")?,
+                        state: state.with_mdns(mdn_msg_id.is_some()),
                         download_state: row.get("download_state")?,
                         error: Some(row.get::<_, String>("error")?)
                             .filter(|error| !error.is_empty()),
@@ -1157,6 +1176,27 @@ impl Message {
         Ok(())
     }
 
+    /// Sets message quote text.
+    ///
+    /// If `text` is `Some((text_str, protect))`, `protect` specifies whether `text_str` should only
+    /// be sent encrypted. If it should, but the message is unencrypted, `text_str` is replaced with
+    /// "...".
+    pub fn set_quote_text(&mut self, text: Option<(String, bool)>) {
+        let Some((text, protect)) = text else {
+            self.param.remove(Param::Quote);
+            self.param.remove(Param::ProtectQuote);
+            return;
+        };
+        self.param.set(Param::Quote, text);
+        self.param.set_optional(
+            Param::ProtectQuote,
+            match protect {
+                true => Some("1"),
+                false => None,
+            },
+        );
+    }
+
     /// Sets message quote.
     ///
     /// Message-Id is used to set Reply-To field, message text is used for quote.
@@ -1173,31 +1213,27 @@ impl Message {
             );
             self.in_reply_to = Some(quote.rfc724_mid.clone());
 
-            if quote
-                .param
-                .get_bool(Param::GuaranteeE2ee)
-                .unwrap_or_default()
-            {
-                self.param.set(Param::ProtectQuote, "1");
-            }
-
             let text = quote.get_text();
-            self.param.set(
-                Param::Quote,
-                if text.is_empty() {
-                    // Use summary, similar to "Image" to avoid sending empty quote.
-                    quote
-                        .get_summary(context, None)
-                        .await?
-                        .truncated_text(500)
-                        .to_string()
-                } else {
-                    text
-                },
-            );
+            let text = if text.is_empty() {
+                // Use summary, similar to "Image" to avoid sending empty quote.
+                quote
+                    .get_summary(context, None)
+                    .await?
+                    .truncated_text(500)
+                    .to_string()
+            } else {
+                text
+            };
+            self.set_quote_text(Some((
+                text,
+                quote
+                    .param
+                    .get_bool(Param::GuaranteeE2ee)
+                    .unwrap_or_default(),
+            )));
         } else {
             self.in_reply_to = None;
-            self.param.remove(Param::Quote);
+            self.set_quote_text(None);
         }
 
         Ok(())
@@ -1336,7 +1372,7 @@ pub enum MessageState {
     OutDelivered = 26,
 
     /// Outgoing message read by the recipient (two checkmarks; this
-    /// requires goodwill on the receiver's side)
+    /// requires goodwill on the receiver's side). Not used in the db for new messages.
     OutMdnRcvd = 28,
 }
 
@@ -1379,6 +1415,14 @@ impl MessageState {
             OutPreparing | OutDraft | OutPending | OutFailed | OutDelivered | OutMdnRcvd
         )
     }
+
+    /// Returns adjusted message state if the message has MDNs.
+    pub(crate) fn with_mdns(self, has_mdns: bool) -> Self {
+        if self == MessageState::OutDelivered && has_mdns {
+            return MessageState::OutMdnRcvd;
+        }
+        self
+    }
 }
 
 /// Returns contacts that sent read receipts and the time of reading.
@@ -1647,6 +1691,7 @@ pub async fn markseen_msgs(context: &Context, msg_ids: Vec<MsgId>) -> Result<()>
                     m.param AS param,
                     m.from_id AS from_id,
                     m.rfc724_mid AS rfc724_mid,
+                    c.archived AS archived,
                     c.blocked AS blocked
                  FROM msgs m LEFT JOIN chats c ON c.id=m.chat_id
                  WHERE m.id IN ({}) AND m.chat_id>9",
@@ -1660,16 +1705,20 @@ pub async fn markseen_msgs(context: &Context, msg_ids: Vec<MsgId>) -> Result<()>
                 let param: Params = row.get::<_, String>("param")?.parse().unwrap_or_default();
                 let from_id: ContactId = row.get("from_id")?;
                 let rfc724_mid: String = row.get("rfc724_mid")?;
+                let visibility: ChatVisibility = row.get("archived")?;
                 let blocked: Option<Blocked> = row.get("blocked")?;
                 let ephemeral_timer: EphemeralTimer = row.get("ephemeral_timer")?;
                 Ok((
-                    id,
-                    chat_id,
-                    state,
-                    param,
-                    from_id,
-                    rfc724_mid,
-                    blocked.unwrap_or_default(),
+                    (
+                        id,
+                        chat_id,
+                        state,
+                        param,
+                        from_id,
+                        rfc724_mid,
+                        visibility,
+                        blocked.unwrap_or_default(),
+                    ),
                     ephemeral_timer,
                 ))
             },
@@ -1677,25 +1726,28 @@ pub async fn markseen_msgs(context: &Context, msg_ids: Vec<MsgId>) -> Result<()>
         )
         .await?;
 
-    if msgs.iter().any(
-        |(_id, _chat_id, _state, _param, _from_id, _rfc724_mid, _blocked, ephemeral_timer)| {
-            *ephemeral_timer != EphemeralTimer::Disabled
-        },
-    ) {
+    if msgs
+        .iter()
+        .any(|(_, ephemeral_timer)| *ephemeral_timer != EphemeralTimer::Disabled)
+    {
         start_ephemeral_timers_msgids(context, &msg_ids)
             .await
             .context("failed to start ephemeral timers")?;
     }
 
     let mut updated_chat_ids = BTreeSet::new();
+    let mut archived_chats_maybe_noticed = false;
     for (
-        id,
-        curr_chat_id,
-        curr_state,
-        curr_param,
-        curr_from_id,
-        curr_rfc724_mid,
-        curr_blocked,
+        (
+            id,
+            curr_chat_id,
+            curr_state,
+            curr_param,
+            curr_from_id,
+            curr_rfc724_mid,
+            curr_visibility,
+            curr_blocked,
+        ),
         _curr_ephemeral_timer,
     ) in msgs
     {
@@ -1717,28 +1769,31 @@ pub async fn markseen_msgs(context: &Context, msg_ids: Vec<MsgId>) -> Result<()>
             if curr_blocked == Blocked::Not
                 && curr_param.get_bool(Param::WantsMdn).unwrap_or_default()
                 && curr_param.get_cmd() == SystemMessage::Unknown
+                && context.should_send_mdns().await?
             {
-                let mdns_enabled = context.get_config_bool(Config::MdnsEnabled).await?;
-                if mdns_enabled {
-                    context
-                        .sql
-                        .execute(
-                            "INSERT INTO smtp_mdns (msg_id, from_id, rfc724_mid) VALUES(?, ?, ?)",
-                            (id, curr_from_id, curr_rfc724_mid),
-                        )
-                        .await
-                        .context("failed to insert into smtp_mdns")?;
-                    context.scheduler.interrupt_smtp().await;
-                }
+                context
+                    .sql
+                    .execute(
+                        "INSERT INTO smtp_mdns (msg_id, from_id, rfc724_mid) VALUES(?, ?, ?)",
+                        (id, curr_from_id, curr_rfc724_mid),
+                    )
+                    .await
+                    .context("failed to insert into smtp_mdns")?;
+                context.scheduler.interrupt_smtp().await;
             }
             updated_chat_ids.insert(curr_chat_id);
         }
+        archived_chats_maybe_noticed |=
+            curr_state == MessageState::InFresh && curr_visibility == ChatVisibility::Archived;
     }
 
     for updated_chat_id in updated_chat_ids {
         context.emit_event(EventType::MsgsNoticed(updated_chat_id));
         chatlist_events::emit_chatlist_item_changed(context, updated_chat_id);
     }
+    if archived_chats_maybe_noticed {
+        context.on_archived_chats_maybe_noticed();
+    }
 
     Ok(())
 }
@@ -1748,6 +1803,10 @@ pub(crate) async fn update_msg_state(
     msg_id: MsgId,
     state: MessageState,
 ) -> Result<()> {
+    ensure!(
+        state != MessageState::OutMdnRcvd,
+        "Update msgs_mdns table instead!"
+    );
     ensure!(state != MessageState::OutFailed, "use set_msg_failed()!");
     let error_subst = match state >= MessageState::OutPending {
         true => ", error=''",
@@ -2325,12 +2384,23 @@ mod tests {
         // Alice quotes encrypted message in unencrypted chat.
         let mut msg = Message::new(Viewtype::Text);
         msg.set_quote(alice, Some(&alice_received_message)).await?;
+        msg.set_text("unencrypted".to_string());
         chat::send_msg(alice, alice_group, &mut msg).await?;
 
         let bob_received_message = bob.recv_msg(&alice.pop_sent_msg().await).await;
         assert_eq!(bob_received_message.quoted_text().unwrap(), "...");
         assert_eq!(bob_received_message.get_showpadlock(), false);
 
+        // Alice replaces a quote of encrypted message with a quote of unencrypted one.
+        let mut msg1 = Message::new(Viewtype::Text);
+        msg1.set_quote(alice, Some(&alice_received_message)).await?;
+        msg1.set_quote(alice, Some(&msg)).await?;
+        chat::send_msg(alice, alice_group, &mut msg1).await?;
+
+        let bob_received_message = bob.recv_msg(&alice.pop_sent_msg().await).await;
+        assert_eq!(bob_received_message.quoted_text().unwrap(), "unencrypted");
+        assert_eq!(bob_received_message.get_showpadlock(), false);
+
         Ok(())
     }
 
@@ -2524,9 +2594,6 @@ mod tests {
         let payload = alice.pop_sent_msg().await;
         assert_state(&alice, alice_msg.id, MessageState::OutDelivered).await;
 
-        update_msg_state(&alice, alice_msg.id, MessageState::OutMdnRcvd).await?;
-        assert_state(&alice, alice_msg.id, MessageState::OutMdnRcvd).await;
-
         set_msg_failed(&alice, &mut alice_msg, "badly failed").await?;
         assert_state(&alice, alice_msg.id, MessageState::OutFailed).await;
 

src/mimefactory.rs

@@ -31,6 +31,7 @@ use crate::tools::IsNoneOrEmpty;
 use crate::tools::{
     create_outgoing_rfc724_mid, create_smeared_timestamp, remove_subject_prefix, time,
 };
+use crate::webxdc::StatusUpdateSerial;
 use crate::{location, peer_channels};
 
 // attachments of 25 mb brutto should work on the majority of providers
@@ -185,7 +186,7 @@ impl MimeFactory {
 
             if !msg.is_system_message()
                 && msg.param.get_int(Param::Reaction).unwrap_or_default() == 0
-                && context.get_config_bool(Config::MdnsEnabled).await?
+                && context.should_request_mdns().await?
             {
                 req_mdn = true;
             }
@@ -453,7 +454,7 @@ impl MimeFactory {
                 };
                 stock_str::subject_for_new_contact(context, self_name).await
             }
-            Loaded::Mdn { .. } => stock_str::read_rcpt(context).await,
+            Loaded::Mdn { .. } => "Receipt Notification".to_string(), // untranslated to no reveal sender's language
         };
 
         Ok(subject)
@@ -671,7 +672,7 @@ impl MimeFactory {
                         })
                 }
             }
-            Loaded::Mdn { .. } => self.render_mdn(context).await?,
+            Loaded::Mdn { .. } => self.render_mdn()?,
         };
 
         let get_content_type_directives_header = || {
@@ -725,18 +726,18 @@ impl MimeFactory {
             } else if header_name == "autocrypt" {
                 unprotected_headers.push(header.clone());
             } else if header_name == "from" {
-                protected_headers.push(header.clone());
-                if is_encrypted && verified || is_securejoin_message {
-                    unprotected_headers.push(
-                        Header::new_with_value(
-                            header.name,
-                            vec![Address::new_mailbox(self.from_addr.clone())],
-                        )
-                        .unwrap(),
-                    );
-                } else {
-                    unprotected_headers.push(header);
+                // Unencrypted securejoin messages should _not_ include the display name:
+                if is_encrypted || !is_securejoin_message {
+                    protected_headers.push(header.clone());
                 }
+
+                unprotected_headers.push(
+                    Header::new_with_value(
+                        header.name,
+                        vec![Address::new_mailbox(self.from_addr.clone())],
+                    )
+                    .unwrap(),
+                );
             } else if header_name == "to" {
                 protected_headers.push(header.clone());
                 if is_encrypted {
@@ -773,7 +774,7 @@ impl MimeFactory {
 
                 match header_name.as_str() {
                     "subject" => {
-                        unprotected_headers.push(Header::new(header.name, "...".to_string()));
+                        unprotected_headers.push(Header::new(header.name, "[...]".to_string()));
                     }
                     "date"
                     | "in-reply-to"
@@ -901,12 +902,11 @@ impl MimeFactory {
                 .fold(message, |message, header| message.header(header.clone()));
 
             if skip_autocrypt || !context.get_config_bool(Config::SignUnencrypted).await? {
-                let protected: HashSet<Header> = HashSet::from_iter(protected_headers.into_iter());
-                for h in unprotected_headers.split_off(0) {
-                    if !protected.contains(&h) {
-                        unprotected_headers.push(h);
-                    }
-                }
+                // Deduplicate unprotected headers that also are in the protected headers:
+                let protected: HashSet<&str> =
+                    HashSet::from_iter(protected_headers.iter().map(|h| h.name.as_str()));
+                unprotected_headers.retain(|h| !protected.contains(&h.name.as_str()));
+
                 message
             } else {
                 let message = message.header(get_content_type_directives_header());
@@ -1369,8 +1369,13 @@ impl MimeFactory {
         } else if msg.viewtype == Viewtype::Webxdc {
             let topic = peer_channels::create_random_topic();
             headers.push(create_iroh_header(context, topic, msg.id).await?);
-            if let Some(json) = context
-                .render_webxdc_status_update_object(msg.id, None)
+            if let (Some(json), _) = context
+                .render_webxdc_status_update_object(
+                    msg.id,
+                    StatusUpdateSerial::MIN,
+                    StatusUpdateSerial::MAX,
+                    None,
+                )
                 .await?
             {
                 parts.push(context.build_status_update_part(&json));
@@ -1394,7 +1399,7 @@ impl MimeFactory {
     }
 
     /// Render an MDN
-    async fn render_mdn(&mut self, context: &Context) -> Result<PartBuilder> {
+    fn render_mdn(&mut self) -> Result<PartBuilder> {
         // RFC 6522, this also requires the `report-type` parameter which is equal
         // to the MIME subtype of the second body part of the multipart/report
         //
@@ -1420,16 +1425,15 @@ impl MimeFactory {
             "multipart/report; report-type=disposition-notification".to_string(),
         ));
 
-        // first body part: always human-readable, always REQUIRED by RFC 6522
-        let message_text = format!(
-            "{}\r\n",
-            format_flowed(&stock_str::read_rcpt_mail_body(context).await)
-        );
+        // first body part: always human-readable, always REQUIRED by RFC 6522.
+        // untranslated to no reveal sender's language.
+        // moreover, translations in unknown languages are confusing, and clients may not display them at all
         let text_part = PartBuilder::new().header((
             "Content-Type".to_string(),
             "text/plain; charset=utf-8; format=flowed; delsp=no".to_string(),
         ));
-        let text_part = self.add_message_text(text_part, message_text);
+        let text_part =
+            self.add_message_text(text_part, "This is a receipt notification.\r\n".to_string());
         message = message.child(text_part.build());
 
         // second body part: machine-readable, always REQUIRED by RFC 6522
@@ -2505,6 +2509,7 @@ mod tests {
             .await?;
         let sent = bob.send_msg(chat, &mut msg).await;
         assert!(msg.get_showpadlock());
+        assert!(sent.payload.contains("\r\nSubject: [...]\r\n"));
 
         let mime = MimeMessage::from_bytes(&alice, sent.payload.as_bytes(), None).await?;
         let mut payload = str::from_utf8(&mime.decoded_data)?.splitn(2, "\r\n\r\n");

src/mimeparser.rs

@@ -11,6 +11,7 @@ use deltachat_derive::{FromSql, ToSql};
 use format_flowed::unformat_flowed;
 use lettre_email::mime::Mime;
 use mailparse::{addrparse_header, DispositionType, MailHeader, MailHeaderMap, SingleInfo};
+use rand::distributions::{Alphanumeric, DistString};
 
 use crate::aheader::{Aheader, EncryptPreference};
 use crate::blob::BlobObject;
@@ -27,10 +28,7 @@ use crate::dehtml::dehtml;
 use crate::events::EventType;
 use crate::headerdef::{HeaderDef, HeaderDefMap};
 use crate::key::{self, load_self_secret_keyring, DcKey, Fingerprint, SignedPublicKey};
-use crate::message::{
-    self, get_vcard_summary, set_msg_failed, update_msg_state, Message, MessageState, MsgId,
-    Viewtype,
-};
+use crate::message::{self, get_vcard_summary, set_msg_failed, Message, MsgId, Viewtype};
 use crate::param::{Param, Params};
 use crate::peerstate::Peerstate;
 use crate::simplify::{simplify, SimplifiedText};
@@ -395,13 +393,10 @@ impl MimeMessage {
                 &mail.headers,
             );
 
-            if let (Some(inner_from), true) = (inner_from, !signatures.is_empty()) {
-                if addr_cmp(&inner_from.addr, &from.addr) {
-                    from_is_signed = true;
-                    from = inner_from;
-                } else {
-                    // There is a From: header in the encrypted &
-                    // signed part, but it doesn't match the outer one.
+            if let Some(inner_from) = inner_from {
+                if !addr_cmp(&inner_from.addr, &from.addr) {
+                    // There is a From: header in the encrypted
+                    // part, but it doesn't match the outer one.
                     // This _might_ be because the sender's mail server
                     // replaced the sending address, e.g. in a mailing list.
                     // Or it's because someone is doing some replay attack.
@@ -410,7 +405,7 @@ impl MimeMessage {
                     // so we return an error below.
                     warn!(
                         context,
-                        "From header in signed part doesn't match the outer one",
+                        "From header in encrypted part doesn't match the outer one",
                     );
 
                     // Return an error from the parser.
@@ -419,6 +414,8 @@ impl MimeMessage {
                     // as if the MIME structure is broken.
                     bail!("From header is forged");
                 }
+                from = inner_from;
+                from_is_signed = !signatures.is_empty();
             }
         }
         if signatures.is_empty() {
@@ -785,7 +782,15 @@ impl MimeMessage {
             .collect::<String>()
             .strip_prefix("base64:")
         {
-            match BlobObject::store_from_base64(context, base64, "avatar").await {
+            // Add random suffix to the filename
+            // to prevent the UI from accidentally using
+            // cached "avatar.jpg".
+            let suffix = Alphanumeric
+                .sample_string(&mut rand::thread_rng(), 7)
+                .to_lowercase();
+
+            match BlobObject::store_from_base64(context, base64, &format!("avatar-{suffix}")).await
+            {
                 Ok(path) => Some(AvatarAction::Change(path)),
                 Err(err) => {
                     warn!(
@@ -2149,24 +2154,32 @@ async fn handle_mdn(
         return Ok(());
     }
 
-    let Some((msg_id, chat_id, msg_state)) = context
+    let Some((msg_id, chat_id, has_mdns, is_dup)) = context
         .sql
         .query_row_optional(
             concat!(
                 "SELECT",
                 "    m.id AS msg_id,",
                 "    c.id AS chat_id,",
-                "    m.state AS state",
-                " FROM msgs m LEFT JOIN chats c ON m.chat_id=c.id",
+                "    mdns.contact_id AS mdn_contact",
+                " FROM msgs m ",
+                " LEFT JOIN chats c ON m.chat_id=c.id",
+                " LEFT JOIN msgs_mdns mdns ON mdns.msg_id=m.id",
                 " WHERE rfc724_mid=? AND from_id=1",
-                " ORDER BY m.id"
+                " ORDER BY msg_id DESC, mdn_contact=? DESC",
+                " LIMIT 1",
             ),
-            (&rfc724_mid,),
+            (&rfc724_mid, from_id),
             |row| {
                 let msg_id: MsgId = row.get("msg_id")?;
                 let chat_id: ChatId = row.get("chat_id")?;
-                let msg_state: MessageState = row.get("state")?;
-                Ok((msg_id, chat_id, msg_state))
+                let mdn_contact: Option<ContactId> = row.get("mdn_contact")?;
+                Ok((
+                    msg_id,
+                    chat_id,
+                    mdn_contact.is_some(),
+                    mdn_contact == Some(from_id),
+                ))
             },
         )
         .await?
@@ -2178,28 +2191,17 @@ async fn handle_mdn(
         return Ok(());
     };
 
-    if !context
-        .sql
-        .exists(
-            "SELECT COUNT(*) FROM msgs_mdns WHERE msg_id=? AND contact_id=?",
-            (msg_id, from_id),
-        )
-        .await?
-    {
-        context
-            .sql
-            .execute(
-                "INSERT INTO msgs_mdns (msg_id, contact_id, timestamp_sent) VALUES (?, ?, ?)",
-                (msg_id, from_id, timestamp_sent),
-            )
-            .await?;
+    if is_dup {
+        return Ok(());
     }
-
-    if msg_state == MessageState::OutPreparing
-        || msg_state == MessageState::OutPending
-        || msg_state == MessageState::OutDelivered
-    {
-        update_msg_state(context, msg_id, MessageState::OutMdnRcvd).await?;
+    context
+        .sql
+        .execute(
+            "INSERT INTO msgs_mdns (msg_id, contact_id, timestamp_sent) VALUES (?, ?, ?)",
+            (msg_id, from_id, timestamp_sent),
+        )
+        .await?;
+    if !has_mdns {
         context.emit_event(EventType::MsgRead { chat_id, msg_id });
         // note(treefit): only matters if it is the last message in chat (but probably too expensive to check, debounce also solves it)
         chatlist_events::emit_chatlist_item_changed(context, chat_id);
@@ -2307,7 +2309,7 @@ mod tests {
         chat,
         chatlist::Chatlist,
         constants::{Blocked, DC_DESIRED_TEXT_LEN, DC_ELLIPSIS},
-        message::MessengerMessage,
+        message::{MessageState, MessengerMessage},
         receive_imf::receive_imf,
         test_utils::{TestContext, TestContextManager},
         tools::time,

src/net.rs

@@ -1,206 +1,88 @@
 //! # Common network utilities.
-use std::net::{IpAddr, SocketAddr};
-use std::net::{Ipv4Addr, Ipv6Addr};
+use std::net::SocketAddr;
 use std::pin::Pin;
-use std::str::FromStr;
 use std::time::Duration;
 
 use anyhow::{format_err, Context as _, Result};
-use tokio::net::{lookup_host, TcpStream};
+use async_native_tls::TlsStream;
+use tokio::net::TcpStream;
 use tokio::time::timeout;
 use tokio_io_timeout::TimeoutStream;
 
 use crate::context::Context;
 use crate::tools::time;
 
+pub(crate) mod dns;
 pub(crate) mod http;
 pub(crate) mod session;
 pub(crate) mod tls;
 
+use dns::lookup_host_with_cache;
 pub use http::{read_url, read_url_blob, Response as HttpResponse};
+use tls::wrap_tls;
 
-async fn connect_tcp_inner(addr: SocketAddr, timeout_val: Duration) -> Result<TcpStream> {
-    let tcp_stream = timeout(timeout_val, TcpStream::connect(addr))
-        .await
-        .context("connection timeout")?
-        .context("connection failure")?;
-    Ok(tcp_stream)
-}
-
-async fn lookup_host_with_timeout(
-    hostname: &str,
-    port: u16,
-    timeout_val: Duration,
-) -> Result<Vec<SocketAddr>> {
-    let res = timeout(timeout_val, lookup_host((hostname, port)))
-        .await
-        .context("DNS lookup timeout")?
-        .context("DNS lookup failure")?;
-    Ok(res.collect())
-}
-
-/// Looks up hostname and port using DNS and updates the address resolution cache.
+/// Connection, write and read timeout.
 ///
-/// If `load_cache` is true, appends cached results not older than 30 days to the end
-/// or entries from fallback cache if there are no cached addresses.
-async fn lookup_host_with_cache(
-    context: &Context,
-    hostname: &str,
-    port: u16,
-    timeout_val: Duration,
-    load_cache: bool,
-) -> Result<Vec<SocketAddr>> {
+/// This constant should be more than the largest expected RTT.
+pub(crate) const TIMEOUT: Duration = Duration::from_secs(60);
+
+/// TTL for caches in seconds.
+pub(crate) const CACHE_TTL: u64 = 30 * 24 * 60 * 60;
+
+/// Removes connection history entries after `CACHE_TTL`.
+pub(crate) async fn prune_connection_history(context: &Context) -> Result<()> {
     let now = time();
-    let mut resolved_addrs = match lookup_host_with_timeout(hostname, port, timeout_val).await {
-        Ok(res) => res,
-        Err(err) => {
-            warn!(
-                context,
-                "DNS resolution for {}:{} failed: {:#}.", hostname, port, err
-            );
-            Vec::new()
-        }
-    };
+    context
+        .sql
+        .execute(
+            "DELETE FROM connection_history
+             WHERE ? > timestamp + ?",
+            (now, CACHE_TTL),
+        )
+        .await?;
+    Ok(())
+}
 
-    for addr in &resolved_addrs {
-        let ip_string = addr.ip().to_string();
-        if ip_string == hostname {
-            // IP address resolved into itself, not interesting to cache.
-            continue;
-        }
+pub(crate) async fn update_connection_history(
+    context: &Context,
+    alpn: &str,
+    host: &str,
+    port: u16,
+    addr: &str,
+    now: i64,
+) -> Result<()> {
+    context
+        .sql
+        .execute(
+            "INSERT INTO connection_history (host, port, alpn, addr, timestamp)
+             VALUES (?, ?, ?, ?, ?)
+             ON CONFLICT (host, port, alpn, addr)
+             DO UPDATE SET timestamp=excluded.timestamp",
+            (host, port, alpn, addr, now),
+        )
+        .await?;
+    Ok(())
+}
 
-        info!(context, "Resolved {}:{} into {}.", hostname, port, &addr);
-
-        // Update the cache.
-        context
-            .sql
-            .execute(
-                "INSERT INTO dns_cache
-                 (hostname, address, timestamp)
-                 VALUES (?, ?, ?)
-                 ON CONFLICT (hostname, address)
-                 DO UPDATE SET timestamp=excluded.timestamp",
-                (hostname, ip_string, now),
-            )
-            .await?;
-    }
-
-    if load_cache {
-        for cached_address in context
-            .sql
-            .query_map(
-                "SELECT address
-                 FROM dns_cache
-                 WHERE hostname = ?
-                 AND ? < timestamp + 30 * 24 * 3600
-                 ORDER BY timestamp DESC",
-                (hostname, now),
-                |row| {
-                    let address: String = row.get(0)?;
-                    Ok(address)
-                },
-                |rows| {
-                    rows.collect::<std::result::Result<Vec<_>, _>>()
-                        .map_err(Into::into)
-                },
-            )
-            .await?
-        {
-            match IpAddr::from_str(&cached_address) {
-                Ok(ip_addr) => {
-                    let addr = SocketAddr::new(ip_addr, port);
-                    if !resolved_addrs.contains(&addr) {
-                        resolved_addrs.push(addr);
-                    }
-                }
-                Err(err) => {
-                    warn!(
-                        context,
-                        "Failed to parse cached address {:?}: {:#}.", cached_address, err
-                    );
-                }
-            }
-        }
-
-        if resolved_addrs.is_empty() {
-            // Load hardcoded cache if everything else fails.
-            //
-            // See <https://support.delta.chat/t/no-dns-resolution-result/2778> and
-            // <https://github.com/deltachat/deltachat-core-rust/issues/4920> for reasons.
-            //
-            // In the future we may pre-resolve all provider database addresses
-            // and build them in.
-            match hostname {
-                "mail.sangham.net" => {
-                    resolved_addrs.push(SocketAddr::new(
-                        IpAddr::V6(Ipv6Addr::new(0x2a01, 0x4f8, 0xc17, 0x798c, 0, 0, 0, 1)),
-                        port,
-                    ));
-                    resolved_addrs.push(SocketAddr::new(
-                        IpAddr::V4(Ipv4Addr::new(159, 69, 186, 85)),
-                        port,
-                    ));
-                }
-                "nine.testrun.org" => {
-                    resolved_addrs.push(SocketAddr::new(
-                        IpAddr::V6(Ipv6Addr::new(0x2a01, 0x4f8, 0x241, 0x4ce8, 0, 0, 0, 2)),
-                        port,
-                    ));
-                    resolved_addrs.push(SocketAddr::new(
-                        IpAddr::V4(Ipv4Addr::new(116, 202, 233, 236)),
-                        port,
-                    ));
-                }
-                "disroot.org" => {
-                    resolved_addrs.push(SocketAddr::new(
-                        IpAddr::V4(Ipv4Addr::new(178, 21, 23, 139)),
-                        port,
-                    ));
-                }
-                "mail.riseup.net" => {
-                    resolved_addrs.push(SocketAddr::new(
-                        IpAddr::V4(Ipv4Addr::new(198, 252, 153, 70)),
-                        port,
-                    ));
-                    resolved_addrs.push(SocketAddr::new(
-                        IpAddr::V4(Ipv4Addr::new(198, 252, 153, 71)),
-                        port,
-                    ));
-                }
-                "imap.gmail.com" => {
-                    resolved_addrs.push(SocketAddr::new(
-                        IpAddr::V6(Ipv6Addr::new(0x2a00, 0x1450, 0x400c, 0xc1f, 0, 0, 0, 0x6c)),
-                        port,
-                    ));
-                    resolved_addrs.push(SocketAddr::new(
-                        IpAddr::V6(Ipv6Addr::new(0x2a00, 0x1450, 0x400c, 0xc1f, 0, 0, 0, 0x6d)),
-                        port,
-                    ));
-                    resolved_addrs.push(SocketAddr::new(
-                        IpAddr::V4(Ipv4Addr::new(142, 250, 110, 109)),
-                        port,
-                    ));
-                    resolved_addrs.push(SocketAddr::new(
-                        IpAddr::V4(Ipv4Addr::new(142, 250, 110, 108)),
-                        port,
-                    ));
-                }
-                "smtp.gmail.com" => {
-                    resolved_addrs.push(SocketAddr::new(
-                        IpAddr::V6(Ipv6Addr::new(0x2a00, 0x1450, 0x4013, 0xc04, 0, 0, 0, 0x6c)),
-                        port,
-                    ));
-                    resolved_addrs.push(SocketAddr::new(
-                        IpAddr::V4(Ipv4Addr::new(142, 250, 110, 109)),
-                        port,
-                    ));
-                }
-                _ => {}
-            }
-        }
-    }
-
-    Ok(resolved_addrs)
+pub(crate) async fn load_connection_timestamp(
+    context: &Context,
+    alpn: &str,
+    host: &str,
+    port: u16,
+    addr: &str,
+) -> Result<Option<i64>> {
+    let timestamp = context
+        .sql
+        .query_get_value(
+            "SELECT timestamp FROM connection_history
+             WHERE host = ?
+               AND port = ?
+               AND alpn = ?
+               AND addr = ?",
+            (host, port, alpn, addr),
+        )
+        .await?;
+    Ok(timestamp)
 }
 
 /// Returns a TCP connection stream with read/write timeouts set
@@ -208,7 +90,37 @@ async fn lookup_host_with_cache(
 ///
 /// `TCP_NODELAY` ensures writing to the stream always results in immediate sending of the packet
 /// to the network, which is important to reduce the latency of interactive protocols such as IMAP.
-///
+pub(crate) async fn connect_tcp_inner(
+    addr: SocketAddr,
+) -> Result<Pin<Box<TimeoutStream<TcpStream>>>> {
+    let tcp_stream = timeout(TIMEOUT, TcpStream::connect(addr))
+        .await
+        .context("connection timeout")?
+        .context("connection failure")?;
+
+    // Disable Nagle's algorithm.
+    tcp_stream.set_nodelay(true)?;
+
+    let mut timeout_stream = TimeoutStream::new(tcp_stream);
+    timeout_stream.set_write_timeout(Some(TIMEOUT));
+    timeout_stream.set_read_timeout(Some(TIMEOUT));
+
+    Ok(Box::pin(timeout_stream))
+}
+
+/// Attempts to establish TLS connection
+/// given the result of the hostname to address resolution.
+pub(crate) async fn connect_tls_inner(
+    addr: SocketAddr,
+    host: &str,
+    strict_tls: bool,
+    alpn: &[&str],
+) -> Result<TlsStream<Pin<Box<TimeoutStream<TcpStream>>>>> {
+    let tcp_stream = connect_tcp_inner(addr).await?;
+    let tls_stream = wrap_tls(strict_tls, host, alpn, tcp_stream).await?;
+    Ok(tls_stream)
+}
+
 /// If `load_cache` is true, may use cached DNS results.
 /// Because the cache may be poisoned with incorrect results by networks hijacking DNS requests,
 /// this option should only be used when connection is authenticated,
@@ -219,57 +131,24 @@ pub(crate) async fn connect_tcp(
     context: &Context,
     host: &str,
     port: u16,
-    timeout_val: Duration,
     load_cache: bool,
 ) -> Result<Pin<Box<TimeoutStream<TcpStream>>>> {
-    let mut tcp_stream = None;
-    let mut last_error = None;
+    let mut first_error = None;
 
-    for resolved_addr in
-        lookup_host_with_cache(context, host, port, timeout_val, load_cache).await?
-    {
-        match connect_tcp_inner(resolved_addr, timeout_val).await {
+    for resolved_addr in lookup_host_with_cache(context, host, port, "", load_cache).await? {
+        match connect_tcp_inner(resolved_addr).await {
             Ok(stream) => {
-                tcp_stream = Some(stream);
-
-                // Maximize priority of this cached entry.
-                context
-                    .sql
-                    .execute(
-                        "UPDATE dns_cache
-                         SET timestamp = ?
-                         WHERE address = ?",
-                        (time(), resolved_addr.ip().to_string()),
-                    )
-                    .await?;
-                break;
+                return Ok(stream);
             }
             Err(err) => {
                 warn!(
                     context,
                     "Failed to connect to {}: {:#}.", resolved_addr, err
                 );
-                last_error = Some(err);
+                first_error.get_or_insert(err);
             }
         }
     }
 
-    let tcp_stream = match tcp_stream {
-        Some(tcp_stream) => tcp_stream,
-        None => {
-            return Err(
-                last_error.unwrap_or_else(|| format_err!("no DNS resolution results for {host}"))
-            );
-        }
-    };
-
-    // Disable Nagle's algorithm.
-    tcp_stream.set_nodelay(true)?;
-
-    let mut timeout_stream = TimeoutStream::new(tcp_stream);
-    timeout_stream.set_write_timeout(Some(timeout_val));
-    timeout_stream.set_read_timeout(Some(timeout_val));
-    let pinned_stream = Box::pin(timeout_stream);
-
-    Ok(pinned_stream)
+    Err(first_error.unwrap_or_else(|| format_err!("no DNS resolution results for {host}")))
 }

src/net/dns.rs

@@ -0,0 +1,870 @@
+//! DNS resolution and cache.
+
+use anyhow::{Context as _, Result};
+use std::collections::HashMap;
+use std::net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr};
+use std::str::FromStr;
+use tokio::net::lookup_host;
+use tokio::time::timeout;
+
+use super::load_connection_timestamp;
+use crate::context::Context;
+use crate::tools::time;
+use once_cell::sync::Lazy;
+
+/// Inserts entry into DNS cache
+/// or updates existing one with a new timestamp.
+async fn update_cache(context: &Context, host: &str, addr: &str, now: i64) -> Result<()> {
+    context
+        .sql
+        .execute(
+            "INSERT INTO dns_cache
+             (hostname, address, timestamp)
+             VALUES (?, ?, ?)
+             ON CONFLICT (hostname, address)
+             DO UPDATE SET timestamp=excluded.timestamp",
+            (host, addr, now),
+        )
+        .await?;
+    Ok(())
+}
+
+pub(crate) async fn prune_dns_cache(context: &Context) -> Result<()> {
+    let now = time();
+    context
+        .sql
+        .execute(
+            "DELETE FROM dns_cache
+             WHERE ? > timestamp + ?",
+            (now, super::CACHE_TTL),
+        )
+        .await?;
+    Ok(())
+}
+
+/// Looks up the hostname and updates DNS cache
+/// on success.
+async fn lookup_host_and_update_cache(
+    context: &Context,
+    hostname: &str,
+    port: u16,
+    now: i64,
+) -> Result<Vec<SocketAddr>> {
+    let res: Vec<SocketAddr> = timeout(super::TIMEOUT, lookup_host((hostname, port)))
+        .await
+        .context("DNS lookup timeout")?
+        .context("DNS lookup failure")?
+        .collect();
+
+    for addr in &res {
+        let ip_string = addr.ip().to_string();
+        if ip_string == hostname {
+            // IP address resolved into itself, not interesting to cache.
+            continue;
+        }
+
+        info!(context, "Resolved {hostname}:{port} into {addr}.");
+
+        // Update the cache.
+        update_cache(context, hostname, &ip_string, now).await?;
+    }
+
+    Ok(res)
+}
+
+// Updates timestamp of the cached entry
+// or inserts a new one if cached entry does not exist.
+//
+// This function should be called when a successful TLS
+// connection is established with strict TLS checks.
+//
+// This increases priority of existing cached entries
+// and copies fallback addresses from built-in cache
+// into database cache on successful use.
+//
+// Unlike built-in cache,
+// database cache is used even if DNS
+// resolver returns a non-empty
+// (but potentially incorrect and unusable) result.
+pub(crate) async fn update_connect_timestamp(
+    context: &Context,
+    host: &str,
+    address: &str,
+) -> Result<()> {
+    if host == address {
+        return Ok(());
+    }
+
+    context
+        .sql
+        .execute(
+            "INSERT INTO dns_cache (hostname, address, timestamp)
+                 VALUES (?, ?, ?)
+                 ON CONFLICT (hostname, address)
+                 DO UPDATE SET timestamp=excluded.timestamp",
+            (host, address, time()),
+        )
+        .await?;
+    Ok(())
+}
+
+static DNS_PRELOAD: Lazy<HashMap<&'static str, Vec<IpAddr>>> = Lazy::new(|| {
+    HashMap::from([
+        (
+            "mail.sangham.net",
+            vec![
+                IpAddr::V4(Ipv4Addr::new(159, 69, 186, 85)),
+                IpAddr::V6(Ipv6Addr::new(0x2a01, 0x4f8, 0xc17, 0x798c, 0, 0, 0, 1)),
+            ],
+        ),
+        (
+            "nine.testrun.org",
+            vec![
+                IpAddr::V4(Ipv4Addr::new(116, 202, 233, 236)),
+                IpAddr::V4(Ipv4Addr::new(128, 140, 126, 197)),
+                IpAddr::V4(Ipv4Addr::new(49, 12, 116, 128)),
+                IpAddr::V6(Ipv6Addr::new(0x2a01, 0x4f8, 0x241, 0x4ce8, 0, 0, 0, 2)),
+            ],
+        ),
+        (
+            "disroot.org",
+            vec![IpAddr::V4(Ipv4Addr::new(178, 21, 23, 139))],
+        ),
+        (
+            "imap.gmail.com",
+            vec![
+                IpAddr::V4(Ipv4Addr::new(142, 250, 110, 108)),
+                IpAddr::V4(Ipv4Addr::new(142, 250, 110, 109)),
+                IpAddr::V4(Ipv4Addr::new(66, 102, 1, 108)),
+                IpAddr::V4(Ipv4Addr::new(66, 102, 1, 109)),
+                IpAddr::V6(Ipv6Addr::new(0x2a00, 0x1450, 0x400c, 0xc1f, 0, 0, 0, 0x6c)),
+                IpAddr::V6(Ipv6Addr::new(0x2a00, 0x1450, 0x400c, 0xc1f, 0, 0, 0, 0x6d)),
+            ],
+        ),
+        (
+            "smtp.gmail.com",
+            vec![
+                IpAddr::V4(Ipv4Addr::new(142, 250, 110, 109)),
+                IpAddr::V6(Ipv6Addr::new(0x2a00, 0x1450, 0x4013, 0xc04, 0, 0, 0, 0x6c)),
+            ],
+        ),
+        (
+            "mail.autistici.org",
+            vec![
+                IpAddr::V4(Ipv4Addr::new(198, 167, 222, 108)),
+                IpAddr::V4(Ipv4Addr::new(82, 94, 249, 234)),
+                IpAddr::V4(Ipv4Addr::new(93, 190, 126, 19)),
+            ],
+        ),
+        (
+            "smtp.autistici.org",
+            vec![
+                IpAddr::V4(Ipv4Addr::new(198, 167, 222, 108)),
+                IpAddr::V4(Ipv4Addr::new(82, 94, 249, 234)),
+                IpAddr::V4(Ipv4Addr::new(93, 190, 126, 19)),
+            ],
+        ),
+        (
+            "daleth.cafe",
+            vec![IpAddr::V4(Ipv4Addr::new(37, 27, 6, 204))],
+        ),
+        (
+            "imap.163.com",
+            vec![IpAddr::V4(Ipv4Addr::new(111, 124, 203, 45))],
+        ),
+        (
+            "smtp.163.com",
+            vec![IpAddr::V4(Ipv4Addr::new(103, 129, 252, 45))],
+        ),
+        (
+            "imap.aol.com",
+            vec![
+                IpAddr::V4(Ipv4Addr::new(212, 82, 101, 33)),
+                IpAddr::V4(Ipv4Addr::new(87, 248, 98, 69)),
+            ],
+        ),
+        (
+            "smtp.aol.com",
+            vec![IpAddr::V4(Ipv4Addr::new(87, 248, 97, 31))],
+        ),
+        (
+            "mail.arcor.de",
+            vec![IpAddr::V4(Ipv4Addr::new(2, 207, 150, 234))],
+        ),
+        (
+            "imap.arcor.de",
+            vec![IpAddr::V4(Ipv4Addr::new(2, 207, 150, 230))],
+        ),
+        (
+            "imap.fastmail.com",
+            vec![
+                IpAddr::V4(Ipv4Addr::new(103, 168, 172, 43)),
+                IpAddr::V4(Ipv4Addr::new(103, 168, 172, 58)),
+            ],
+        ),
+        (
+            "smtp.fastmail.com",
+            vec![
+                IpAddr::V4(Ipv4Addr::new(103, 168, 172, 45)),
+                IpAddr::V4(Ipv4Addr::new(103, 168, 172, 60)),
+            ],
+        ),
+        (
+            "imap.gmx.net",
+            vec![
+                IpAddr::V4(Ipv4Addr::new(212, 227, 17, 170)),
+                IpAddr::V4(Ipv4Addr::new(212, 227, 17, 186)),
+            ],
+        ),
+        (
+            "imap.mail.de",
+            vec![IpAddr::V4(Ipv4Addr::new(62, 201, 172, 16))],
+        ),
+        (
+            "smtp.mailbox.org",
+            vec![IpAddr::V4(Ipv4Addr::new(185, 97, 174, 196))],
+        ),
+        (
+            "imap.mailbox.org",
+            vec![IpAddr::V4(Ipv4Addr::new(185, 97, 174, 199))],
+        ),
+        (
+            "imap.naver.com",
+            vec![IpAddr::V4(Ipv4Addr::new(125, 209, 238, 153))],
+        ),
+        (
+            "imap.ouvaton.coop",
+            vec![IpAddr::V4(Ipv4Addr::new(194, 36, 166, 20))],
+        ),
+        (
+            "imap.purelymail.com",
+            vec![IpAddr::V4(Ipv4Addr::new(18, 204, 123, 63))],
+        ),
+        (
+            "imap.tiscali.it",
+            vec![IpAddr::V4(Ipv4Addr::new(213, 205, 33, 10))],
+        ),
+        (
+            "smtp.tiscali.it",
+            vec![IpAddr::V4(Ipv4Addr::new(213, 205, 33, 13))],
+        ),
+        (
+            "imap.web.de",
+            vec![
+                IpAddr::V4(Ipv4Addr::new(212, 227, 17, 162)),
+                IpAddr::V4(Ipv4Addr::new(212, 227, 17, 178)),
+            ],
+        ),
+        (
+            "imap.ziggo.nl",
+            vec![IpAddr::V4(Ipv4Addr::new(84, 116, 6, 3))],
+        ),
+        (
+            "imap.zoho.eu",
+            vec![IpAddr::V4(Ipv4Addr::new(185, 230, 214, 25))],
+        ),
+        (
+            "imaps.bluewin.ch",
+            vec![
+                IpAddr::V4(Ipv4Addr::new(16, 62, 253, 42)),
+                IpAddr::V4(Ipv4Addr::new(16, 63, 141, 244)),
+                IpAddr::V4(Ipv4Addr::new(16, 63, 146, 183)),
+            ],
+        ),
+        (
+            "mail.buzon.uy",
+            vec![IpAddr::V4(Ipv4Addr::new(185, 101, 93, 79))],
+        ),
+        (
+            "mail.ecloud.global",
+            vec![IpAddr::V4(Ipv4Addr::new(95, 217, 246, 96))],
+        ),
+        (
+            "mail.ende.in.net",
+            vec![IpAddr::V4(Ipv4Addr::new(95, 217, 5, 72))],
+        ),
+        (
+            "mail.gmx.net",
+            vec![
+                IpAddr::V4(Ipv4Addr::new(212, 227, 17, 168)),
+                IpAddr::V4(Ipv4Addr::new(212, 227, 17, 190)),
+            ],
+        ),
+        (
+            "mail.infomaniak.com",
+            vec![
+                IpAddr::V4(Ipv4Addr::new(83, 166, 143, 44)),
+                IpAddr::V4(Ipv4Addr::new(83, 166, 143, 45)),
+            ],
+        ),
+        (
+            "mail.mymagenta.at",
+            vec![IpAddr::V4(Ipv4Addr::new(80, 109, 253, 241))],
+        ),
+        (
+            "mail.nubo.coop",
+            vec![IpAddr::V4(Ipv4Addr::new(79, 99, 201, 10))],
+        ),
+        (
+            "mail.riseup.net",
+            vec![
+                IpAddr::V4(Ipv4Addr::new(198, 252, 153, 70)),
+                IpAddr::V4(Ipv4Addr::new(198, 252, 153, 71)),
+            ],
+        ),
+        (
+            "mail.systemausfall.org",
+            vec![
+                IpAddr::V4(Ipv4Addr::new(51, 75, 71, 249)),
+                IpAddr::V4(Ipv4Addr::new(80, 153, 252, 42)),
+            ],
+        ),
+        (
+            "mail.systemli.org",
+            vec![IpAddr::V4(Ipv4Addr::new(93, 190, 126, 36))],
+        ),
+        (
+            "mehl.cloud",
+            vec![IpAddr::V4(Ipv4Addr::new(95, 217, 223, 172))],
+        ),
+        (
+            "mx.freenet.de",
+            vec![
+                IpAddr::V4(Ipv4Addr::new(195, 4, 92, 210)),
+                IpAddr::V4(Ipv4Addr::new(195, 4, 92, 211)),
+                IpAddr::V4(Ipv4Addr::new(195, 4, 92, 212)),
+                IpAddr::V4(Ipv4Addr::new(195, 4, 92, 213)),
+            ],
+        ),
+        (
+            "newyear.aktivix.org",
+            vec![IpAddr::V4(Ipv4Addr::new(162, 247, 75, 192))],
+        ),
+        (
+            "pimap.schulon.org",
+            vec![IpAddr::V4(Ipv4Addr::new(194, 77, 246, 20))],
+        ),
+        (
+            "posteo.de",
+            vec![
+                IpAddr::V4(Ipv4Addr::new(185, 67, 36, 168)),
+                IpAddr::V4(Ipv4Addr::new(185, 67, 36, 169)),
+            ],
+        ),
+        (
+            "psmtp.schulon.org",
+            vec![IpAddr::V4(Ipv4Addr::new(194, 77, 246, 20))],
+        ),
+        (
+            "secureimap.t-online.de",
+            vec![
+                IpAddr::V4(Ipv4Addr::new(194, 25, 134, 114)),
+                IpAddr::V4(Ipv4Addr::new(194, 25, 134, 115)),
+                IpAddr::V4(Ipv4Addr::new(194, 25, 134, 50)),
+                IpAddr::V4(Ipv4Addr::new(194, 25, 134, 51)),
+            ],
+        ),
+        (
+            "securesmtp.t-online.de",
+            vec![
+                IpAddr::V4(Ipv4Addr::new(194, 25, 134, 110)),
+                IpAddr::V4(Ipv4Addr::new(194, 25, 134, 46)),
+            ],
+        ),
+        (
+            "smtp.aliyun.com",
+            vec![IpAddr::V4(Ipv4Addr::new(47, 246, 136, 232))],
+        ),
+        (
+            "smtp.mail.de",
+            vec![IpAddr::V4(Ipv4Addr::new(62, 201, 172, 21))],
+        ),
+        (
+            "smtp.mail.ru",
+            vec![
+                IpAddr::V4(Ipv4Addr::new(217, 69, 139, 160)),
+                IpAddr::V4(Ipv4Addr::new(94, 100, 180, 160)),
+            ],
+        ),
+        (
+            "imap.mail.yahoo.com",
+            vec![
+                IpAddr::V4(Ipv4Addr::new(87, 248, 103, 8)),
+                IpAddr::V4(Ipv4Addr::new(212, 82, 101, 24)),
+            ],
+        ),
+        (
+            "smtp.mail.yahoo.com",
+            vec![IpAddr::V4(Ipv4Addr::new(87, 248, 97, 36))],
+        ),
+        (
+            "imap.mailo.com",
+            vec![IpAddr::V4(Ipv4Addr::new(213, 182, 54, 20))],
+        ),
+        (
+            "smtp.mailo.com",
+            vec![IpAddr::V4(Ipv4Addr::new(213, 182, 54, 20))],
+        ),
+        (
+            "smtp.naver.com",
+            vec![IpAddr::V4(Ipv4Addr::new(125, 209, 238, 155))],
+        ),
+        (
+            "smtp.ouvaton.coop",
+            vec![IpAddr::V4(Ipv4Addr::new(194, 36, 166, 20))],
+        ),
+        (
+            "smtp.purelymail.com",
+            vec![IpAddr::V4(Ipv4Addr::new(18, 204, 123, 63))],
+        ),
+        (
+            "imap.qq.com",
+            vec![IpAddr::V4(Ipv4Addr::new(43, 129, 255, 54))],
+        ),
+        (
+            "smtp.qq.com",
+            vec![IpAddr::V4(Ipv4Addr::new(43, 129, 255, 54))],
+        ),
+        (
+            "imap.rambler.ru",
+            vec![
+                IpAddr::V4(Ipv4Addr::new(81, 19, 77, 169)),
+                IpAddr::V4(Ipv4Addr::new(81, 19, 77, 171)),
+                IpAddr::V4(Ipv4Addr::new(81, 19, 77, 168)),
+                IpAddr::V4(Ipv4Addr::new(81, 19, 77, 170)),
+            ],
+        ),
+        (
+            "smtp.rambler.ru",
+            vec![
+                IpAddr::V4(Ipv4Addr::new(81, 19, 77, 165)),
+                IpAddr::V4(Ipv4Addr::new(81, 19, 77, 167)),
+                IpAddr::V4(Ipv4Addr::new(81, 19, 77, 166)),
+                IpAddr::V4(Ipv4Addr::new(81, 19, 77, 164)),
+            ],
+        ),
+        (
+            "imap.vivaldi.net",
+            vec![IpAddr::V4(Ipv4Addr::new(31, 209, 137, 15))],
+        ),
+        (
+            "smtp.vivaldi.net",
+            vec![IpAddr::V4(Ipv4Addr::new(31, 209, 137, 12))],
+        ),
+        (
+            "imap.vodafonemail.de",
+            vec![IpAddr::V4(Ipv4Addr::new(2, 207, 150, 230))],
+        ),
+        (
+            "smtp.vodafonemail.de",
+            vec![IpAddr::V4(Ipv4Addr::new(2, 207, 150, 234))],
+        ),
+        (
+            "smtp.web.de",
+            vec![
+                IpAddr::V4(Ipv4Addr::new(213, 165, 67, 108)),
+                IpAddr::V4(Ipv4Addr::new(213, 165, 67, 124)),
+            ],
+        ),
+        (
+            "imap.yandex.com",
+            vec![IpAddr::V4(Ipv4Addr::new(77, 88, 21, 125))],
+        ),
+        (
+            "smtp.yandex.com",
+            vec![IpAddr::V4(Ipv4Addr::new(77, 88, 21, 158))],
+        ),
+        (
+            "smtp.ziggo.nl",
+            vec![IpAddr::V4(Ipv4Addr::new(84, 116, 6, 3))],
+        ),
+        (
+            "smtp.zoho.eu",
+            vec![IpAddr::V4(Ipv4Addr::new(185, 230, 212, 164))],
+        ),
+        (
+            "smtpauths.bluewin.ch",
+            vec![IpAddr::V4(Ipv4Addr::new(195, 186, 120, 54))],
+        ),
+        (
+            "stinpriza.net",
+            vec![IpAddr::V4(Ipv4Addr::new(5, 9, 122, 184))],
+        ),
+        (
+            "undernet.uy",
+            vec![IpAddr::V4(Ipv4Addr::new(167, 62, 254, 153))],
+        ),
+        (
+            "webbox222.server-home.org",
+            vec![IpAddr::V4(Ipv4Addr::new(91, 203, 111, 88))],
+        ),
+    ])
+});
+
+/// Load hardcoded cache if everything else fails.
+///
+/// See <https://support.delta.chat/t/no-dns-resolution-result/2778> and
+/// <https://github.com/deltachat/deltachat-core-rust/issues/4920> for reasons.
+///
+/// In the future we may pre-resolve all provider database addresses
+/// and build them in.
+fn load_hardcoded_cache(hostname: &str, port: u16) -> Vec<SocketAddr> {
+    if let Some(ips) = DNS_PRELOAD.get(hostname) {
+        ips.iter().map(|ip| SocketAddr::new(*ip, port)).collect()
+    } else {
+        Vec::new()
+    }
+}
+
+async fn lookup_cache(
+    context: &Context,
+    host: &str,
+    port: u16,
+    alpn: &str,
+    now: i64,
+) -> Result<Vec<SocketAddr>> {
+    let mut res = Vec::new();
+    for cached_address in context
+        .sql
+        .query_map(
+            "SELECT dns_cache.address
+             FROM dns_cache
+             LEFT JOIN connection_history
+               ON dns_cache.hostname = connection_history.host
+               AND dns_cache.address = connection_history.addr
+               AND connection_history.port = ?
+               AND connection_history.alpn = ?
+             WHERE dns_cache.hostname = ?
+             AND ? < dns_cache.timestamp + ?
+             ORDER BY IFNULL(connection_history.timestamp, dns_cache.timestamp) DESC
+             LIMIT 50",
+            (port, alpn, host, now, super::CACHE_TTL),
+            |row| {
+                let address: String = row.get(0)?;
+                Ok(address)
+            },
+            |rows| {
+                rows.collect::<std::result::Result<Vec<String>, _>>()
+                    .map_err(Into::into)
+            },
+        )
+        .await?
+    {
+        match IpAddr::from_str(&cached_address) {
+            Ok(ip_addr) => {
+                let addr = SocketAddr::new(ip_addr, port);
+                res.push(addr);
+            }
+            Err(err) => {
+                warn!(
+                    context,
+                    "Failed to parse cached address {:?}: {:#}.", cached_address, err
+                );
+            }
+        }
+    }
+    Ok(res)
+}
+
+/// Sorts DNS resolution results by connection timestamp in descending order
+/// so IP addresses that we recently connected to successfully are tried first.
+async fn sort_by_connection_timestamp(
+    context: &Context,
+    input: Vec<SocketAddr>,
+    alpn: &str,
+    host: &str,
+) -> Result<Vec<SocketAddr>> {
+    let mut res: Vec<(Option<i64>, SocketAddr)> = Vec::new();
+    for addr in input {
+        let timestamp =
+            load_connection_timestamp(context, alpn, host, addr.port(), &addr.ip().to_string())
+                .await?;
+        res.push((timestamp, addr));
+    }
+    res.sort_by_key(|(ts, _addr)| std::cmp::Reverse(*ts));
+    Ok(res.into_iter().map(|(_ts, addr)| addr).collect())
+}
+
+/// Looks up hostname and port using DNS and updates the address resolution cache.
+///
+/// `alpn` is used to sort DNS results by the time we have successfully
+/// connected to the IP address using given `alpn`.
+/// If result sorting is not needed or `alpn` is unknown,
+/// pass empty string here, e.g. for HTTP requests
+/// or when resolving the IP address of SOCKS proxy.
+///
+/// If `load_cache` is true, appends cached results not older than 30 days to the end
+/// or entries from fallback cache if there are no cached addresses.
+pub(crate) async fn lookup_host_with_cache(
+    context: &Context,
+    hostname: &str,
+    port: u16,
+    alpn: &str,
+    load_cache: bool,
+) -> Result<Vec<SocketAddr>> {
+    let now = time();
+    let mut resolved_addrs = match lookup_host_and_update_cache(context, hostname, port, now).await
+    {
+        Ok(res) => res,
+        Err(err) => {
+            warn!(
+                context,
+                "DNS resolution for {hostname}:{port} failed: {err:#}."
+            );
+            Vec::new()
+        }
+    };
+    if !alpn.is_empty() {
+        resolved_addrs =
+            sort_by_connection_timestamp(context, resolved_addrs, alpn, hostname).await?;
+    }
+
+    if load_cache {
+        for addr in lookup_cache(context, hostname, port, alpn, now).await? {
+            if !resolved_addrs.contains(&addr) {
+                resolved_addrs.push(addr);
+            }
+        }
+
+        if resolved_addrs.is_empty() {
+            return Ok(load_hardcoded_cache(hostname, port));
+        }
+    }
+
+    Ok(resolved_addrs)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    use crate::net::update_connection_history;
+    use crate::test_utils::TestContext;
+
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_sort_by_connection_timestamp() {
+        let alice = &TestContext::new_alice().await;
+        let now = time();
+
+        let ipv6_addr = IpAddr::V6(Ipv6Addr::new(0x2a01, 0x4f8, 0x241, 0x4ce8, 0, 0, 0, 2));
+        let ipv4_addr = IpAddr::V4(Ipv4Addr::new(116, 202, 233, 236));
+
+        assert_eq!(
+            sort_by_connection_timestamp(
+                alice,
+                vec![
+                    SocketAddr::new(ipv6_addr, 993),
+                    SocketAddr::new(ipv4_addr, 993)
+                ],
+                "imap",
+                "nine.testrun.org"
+            )
+            .await
+            .unwrap(),
+            vec![
+                SocketAddr::new(ipv6_addr, 993),
+                SocketAddr::new(ipv4_addr, 993)
+            ]
+        );
+        update_connection_history(
+            alice,
+            "imap",
+            "nine.testrun.org",
+            993,
+            "116.202.233.236",
+            now,
+        )
+        .await
+        .unwrap();
+        assert_eq!(
+            sort_by_connection_timestamp(
+                alice,
+                vec![
+                    SocketAddr::new(ipv6_addr, 993),
+                    SocketAddr::new(ipv4_addr, 993)
+                ],
+                "imap",
+                "nine.testrun.org"
+            )
+            .await
+            .unwrap(),
+            vec![
+                SocketAddr::new(ipv4_addr, 993),
+                SocketAddr::new(ipv6_addr, 993),
+            ]
+        );
+
+        assert_eq!(
+            sort_by_connection_timestamp(
+                alice,
+                vec![
+                    SocketAddr::new(ipv6_addr, 465),
+                    SocketAddr::new(ipv4_addr, 465)
+                ],
+                "smtp",
+                "nine.testrun.org"
+            )
+            .await
+            .unwrap(),
+            vec![
+                SocketAddr::new(ipv6_addr, 465),
+                SocketAddr::new(ipv4_addr, 465),
+            ]
+        );
+        update_connection_history(
+            alice,
+            "smtp",
+            "nine.testrun.org",
+            465,
+            "116.202.233.236",
+            now,
+        )
+        .await
+        .unwrap();
+        assert_eq!(
+            sort_by_connection_timestamp(
+                alice,
+                vec![
+                    SocketAddr::new(ipv6_addr, 465),
+                    SocketAddr::new(ipv4_addr, 465)
+                ],
+                "smtp",
+                "nine.testrun.org"
+            )
+            .await
+            .unwrap(),
+            vec![
+                SocketAddr::new(ipv4_addr, 465),
+                SocketAddr::new(ipv6_addr, 465),
+            ]
+        );
+
+        update_connection_history(
+            alice,
+            "imap",
+            "nine.testrun.org",
+            993,
+            "2a01:4f8:241:4ce8::2",
+            now,
+        )
+        .await
+        .unwrap();
+        assert_eq!(
+            sort_by_connection_timestamp(
+                alice,
+                vec![
+                    SocketAddr::new(ipv6_addr, 993),
+                    SocketAddr::new(ipv4_addr, 993)
+                ],
+                "imap",
+                "nine.testrun.org"
+            )
+            .await
+            .unwrap(),
+            vec![
+                SocketAddr::new(ipv6_addr, 993),
+                SocketAddr::new(ipv4_addr, 993)
+            ]
+        );
+    }
+
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_lookup_cache() {
+        let alice = &TestContext::new_alice().await;
+
+        let ipv4_addr = IpAddr::V4(Ipv4Addr::new(116, 202, 233, 236));
+        let ipv6_addr = IpAddr::V6(Ipv6Addr::new(0x2a01, 0x4f8, 0x241, 0x4ce8, 0, 0, 0, 2));
+
+        let now = time();
+        assert!(lookup_cache(alice, "nine.testrun.org", 587, "smtp", now)
+            .await
+            .unwrap()
+            .is_empty());
+
+        update_cache(alice, "nine.testrun.org", "116.202.233.236", now)
+            .await
+            .unwrap();
+
+        assert_eq!(
+            lookup_cache(alice, "nine.testrun.org", 587, "smtp", now)
+                .await
+                .unwrap(),
+            vec![SocketAddr::new(ipv4_addr, 587)]
+        );
+
+        // Cache should be returned for other ports and no ALPN as well,
+        // port and ALPN should only affect the order
+        assert_eq!(
+            lookup_cache(alice, "nine.testrun.org", 443, "", now)
+                .await
+                .unwrap(),
+            vec![SocketAddr::new(ipv4_addr, 443)]
+        );
+
+        update_cache(alice, "nine.testrun.org", "2a01:4f8:241:4ce8::2", now + 30)
+            .await
+            .unwrap();
+
+        // New DNS cache entry should go first.
+        assert_eq!(
+            lookup_cache(alice, "nine.testrun.org", 443, "", now + 60)
+                .await
+                .unwrap(),
+            vec![
+                SocketAddr::new(ipv6_addr, 443),
+                SocketAddr::new(ipv4_addr, 443)
+            ],
+        );
+
+        // After successful connection to SMTP over port 465 using IPv4 address,
+        // IPv4 address has higher priority.
+        update_connection_history(
+            alice,
+            "smtp",
+            "nine.testrun.org",
+            465,
+            "116.202.233.236",
+            now + 100,
+        )
+        .await
+        .unwrap();
+        assert_eq!(
+            lookup_cache(alice, "nine.testrun.org", 465, "smtp", now + 120)
+                .await
+                .unwrap(),
+            vec![
+                SocketAddr::new(ipv4_addr, 465),
+                SocketAddr::new(ipv6_addr, 465)
+            ]
+        );
+
+        // For other ports and ALPNs order remains the same.
+        assert_eq!(
+            lookup_cache(alice, "nine.testrun.org", 993, "imap", now + 120)
+                .await
+                .unwrap(),
+            vec![
+                SocketAddr::new(ipv6_addr, 993),
+                SocketAddr::new(ipv4_addr, 993)
+            ],
+        );
+        assert_eq!(
+            lookup_cache(alice, "nine.testrun.org", 465, "imap", now + 120)
+                .await
+                .unwrap(),
+            vec![
+                SocketAddr::new(ipv6_addr, 465),
+                SocketAddr::new(ipv4_addr, 465)
+            ],
+        );
+        assert_eq!(
+            lookup_cache(alice, "nine.testrun.org", 993, "smtp", now + 120)
+                .await
+                .unwrap(),
+            vec![
+                SocketAddr::new(ipv6_addr, 993),
+                SocketAddr::new(ipv4_addr, 993)
+            ],
+        );
+    }
+}

src/net/http.rs

@@ -1,16 +1,15 @@
 //! # HTTP module.
 
-use std::time::Duration;
+use std::sync::Arc;
 
 use anyhow::{anyhow, Result};
 use mime::Mime;
 use once_cell::sync::Lazy;
 
 use crate::context::Context;
+use crate::net::lookup_host_with_cache;
 use crate::socks::Socks5Config;
 
-const HTTP_TIMEOUT: Duration = Duration::from_secs(30);
-
 static LETSENCRYPT_ROOT: Lazy<reqwest::tls::Certificate> = Lazy::new(|| {
     reqwest::tls::Certificate::from_der(include_bytes!(
         "../../assets/root-certificates/letsencrypt/isrgrootx1.der"
@@ -60,8 +59,13 @@ pub async fn read_url_blob(context: &Context, url: &str) -> Result<Response> {
 }
 
 async fn read_url_inner(context: &Context, url: &str) -> Result<reqwest::Response> {
-    let socks5_config = Socks5Config::from_database(&context.sql).await?;
-    let client = get_client(socks5_config)?;
+    // It is safe to use cached IP addresses
+    // for HTTPS URLs, but for HTTP URLs
+    // better resolve from scratch each time to prevent
+    // cache poisoning attacks from having lasting effects.
+    let load_cache = url.starts_with("https://");
+
+    let client = get_client(context, load_cache).await?;
     let mut url = url.to_string();
 
     // Follow up to 10 http-redirects
@@ -86,10 +90,56 @@ async fn read_url_inner(context: &Context, url: &str) -> Result<reqwest::Respons
     Err(anyhow!("Followed 10 redirections"))
 }
 
-pub(crate) fn get_client(socks5_config: Option<Socks5Config>) -> Result<reqwest::Client> {
+struct CustomResolver {
+    context: Context,
+
+    /// Whether to return cached results or not.
+    /// If resolver can be used for URLs
+    /// without TLS, e.g. HTTP URLs from HTML email,
+    /// this must be false. If TLS is used
+    /// and certificate hostnames are checked,
+    /// it is safe to load cache.
+    load_cache: bool,
+}
+
+impl CustomResolver {
+    fn new(context: Context, load_cache: bool) -> Self {
+        Self {
+            context,
+            load_cache,
+        }
+    }
+}
+
+impl reqwest::dns::Resolve for CustomResolver {
+    fn resolve(&self, hostname: reqwest::dns::Name) -> reqwest::dns::Resolving {
+        let context = self.context.clone();
+        let load_cache = self.load_cache;
+        Box::pin(async move {
+            let port = 443; // Actual port does not matter.
+
+            let socket_addrs =
+                lookup_host_with_cache(&context, hostname.as_str(), port, "", load_cache).await;
+            match socket_addrs {
+                Ok(socket_addrs) => {
+                    let addrs: reqwest::dns::Addrs = Box::new(socket_addrs.into_iter());
+
+                    Ok(addrs)
+                }
+                Err(err) => Err(err.into()),
+            }
+        })
+    }
+}
+
+pub(crate) async fn get_client(context: &Context, load_cache: bool) -> Result<reqwest::Client> {
+    let socks5_config = Socks5Config::from_database(&context.sql).await?;
+    let resolver = Arc::new(CustomResolver::new(context.clone(), load_cache));
+
     let builder = reqwest::ClientBuilder::new()
-        .timeout(HTTP_TIMEOUT)
-        .add_root_certificate(LETSENCRYPT_ROOT.clone());
+        .timeout(super::TIMEOUT)
+        .add_root_certificate(LETSENCRYPT_ROOT.clone())
+        .dns_resolver(resolver);
 
     let builder = if let Some(socks5_config) = socks5_config {
         let proxy = reqwest::Proxy::all(socks5_config.to_url())?;

src/net/tls.rs

@@ -14,9 +14,10 @@ static LETSENCRYPT_ROOT: Lazy<Certificate> = Lazy::new(|| {
     .unwrap()
 });
 
-pub fn build_tls(strict_tls: bool) -> TlsConnector {
+pub fn build_tls(strict_tls: bool, alpns: &[&str]) -> TlsConnector {
     let tls_builder = TlsConnector::new()
         .min_protocol_version(Some(Protocol::Tlsv12))
+        .request_alpns(alpns)
         .add_root_certificate(LETSENCRYPT_ROOT.clone());
 
     if strict_tls {
@@ -31,9 +32,10 @@ pub fn build_tls(strict_tls: bool) -> TlsConnector {
 pub async fn wrap_tls<T: AsyncRead + AsyncWrite + Unpin>(
     strict_tls: bool,
     hostname: &str,
+    alpn: &[&str],
     stream: T,
 ) -> Result<TlsStream<T>> {
-    let tls = build_tls(strict_tls);
+    let tls = build_tls(strict_tls, alpn);
     let tls_stream = tls.connect(hostname, stream).await?;
     Ok(tls_stream)
 }
@@ -46,7 +48,7 @@ mod tests {
     fn test_build_tls() {
         // we are using some additional root certificates.
         // make sure, they do not break construction of TlsConnector
-        let _ = build_tls(true);
-        let _ = build_tls(false);
+        let _ = build_tls(true, &[]);
+        let _ = build_tls(false, &[]);
     }
 }

src/oauth2.rs

@@ -10,7 +10,6 @@ use crate::config::Config;
 use crate::context::Context;
 use crate::provider;
 use crate::provider::Oauth2Authorizer;
-use crate::socks::Socks5Config;
 use crate::tools::time;
 
 const OAUTH2_GMAIL: Oauth2 = Oauth2 {
@@ -159,8 +158,12 @@ pub(crate) async fn get_oauth2_access_token(
         }
 
         // ... and POST
-        let socks5_config = Socks5Config::from_database(&context.sql).await?;
-        let client = crate::net::http::get_client(socks5_config)?;
+
+        // All OAuth URLs are hardcoded HTTPS URLs,
+        // so it is safe to load DNS cache.
+        let load_cache = true;
+
+        let client = crate::net::http::get_client(context, load_cache).await?;
 
         let response: Response = match client.post(post_url).form(&post_param).send().await {
             Ok(resp) => match resp.json().await {
@@ -290,8 +293,12 @@ impl Oauth2 {
         //   "verified_email": true,
         //   "picture": "https://lh4.googleusercontent.com/-Gj5jh_9R0BY/AAAAAAAAAAI/AAAAAAAAAAA/IAjtjfjtjNA/photo.jpg"
         // }
-        let socks5_config = Socks5Config::from_database(&context.sql).await.ok()?;
-        let client = match crate::net::http::get_client(socks5_config) {
+
+        // All OAuth URLs are hardcoded HTTPS URLs,
+        // so it is safe to load DNS cache.
+        let load_cache = true;
+
+        let client = match crate::net::http::get_client(context, load_cache).await {
             Ok(cl) => cl,
             Err(err) => {
                 warn!(context, "failed to get HTTP client: {}", err);

src/peer_channels.rs

@@ -25,15 +25,17 @@
 
 use anyhow::{anyhow, Context as _, Result};
 use email::Header;
-use iroh_gossip::net::{Gossip, JoinTopicFut, GOSSIP_ALPN};
-use iroh_gossip::proto::{Event as IrohEvent, TopicId};
+use futures_lite::StreamExt;
+use iroh_gossip::net::{Event, Gossip, GossipEvent, JoinOptions, GOSSIP_ALPN};
+use iroh_gossip::proto::TopicId;
 use iroh_net::key::{PublicKey, SecretKey};
 use iroh_net::relay::{RelayMap, RelayUrl};
 use iroh_net::{relay::RelayMode, Endpoint};
 use iroh_net::{NodeAddr, NodeId};
+use parking_lot::Mutex;
 use std::collections::{BTreeSet, HashMap};
 use std::env;
-use tokio::sync::RwLock;
+use tokio::sync::{oneshot, RwLock};
 use tokio::task::JoinHandle;
 use url::Url;
 
@@ -58,6 +60,9 @@ pub struct Iroh {
     /// [Gossip] needed for iroh peer channels.
     pub(crate) gossip: Gossip,
 
+    /// Sequence numbers for gossip channels.
+    pub(crate) sequence_numbers: Mutex<HashMap<TopicId, i32>>,
+
     /// Topics for which an advertisement has already been sent.
     pub(crate) iroh_channels: RwLock<HashMap<TopicId, ChannelState>>,
 
@@ -82,7 +87,7 @@ impl Iroh {
         &self,
         ctx: &Context,
         msg_id: MsgId,
-    ) -> Result<Option<JoinTopicFut>> {
+    ) -> Result<Option<oneshot::Receiver<()>>> {
         let topic = get_iroh_topic_for_msg(ctx, msg_id)
             .await?
             .with_context(|| format!("Message {msg_id} has no gossip topic"))?;
@@ -93,56 +98,54 @@ impl Iroh {
         // Otherwise we would receive every message twice or more times.
         let mut iroh_channels = self.iroh_channels.write().await;
 
-        let seq = if let Some(channel_state) = iroh_channels.get(&topic) {
-            if channel_state.subscribe_loop.is_some() {
-                return Ok(None);
-            }
-            channel_state.seq_number
-        } else {
-            0
-        };
-
-        let peers = get_iroh_gossip_peers(ctx, msg_id).await?;
-        info!(
-            ctx,
-            "IROH_REALTIME: Joining gossip with peers: {:?}",
-            peers.iter().map(|p| p.node_id).collect::<Vec<_>>()
-        );
-
-        // Connect to all peers
-        for peer in &peers {
-            self.endpoint.add_node_addr(peer.clone())?;
+        if iroh_channels.contains_key(&topic) {
+            return Ok(None);
         }
 
-        let connect_future = self
+        let peers = get_iroh_gossip_peers(ctx, msg_id).await?;
+        let node_ids = peers.iter().map(|p| p.node_id).collect::<Vec<_>>();
+
+        info!(
+            ctx,
+            "IROH_REALTIME: Joining gossip with peers: {:?}", node_ids,
+        );
+
+        // Inform iroh of potentially new node addresses
+        for node_addr in &peers {
+            if !node_addr.info.is_empty() {
+                self.endpoint.add_node_addr(node_addr.clone())?;
+            }
+        }
+
+        let (join_tx, join_rx) = oneshot::channel();
+
+        let (gossip_sender, gossip_receiver) = self
             .gossip
-            .join(topic, peers.into_iter().map(|addr| addr.node_id).collect())
-            .await?;
+            .join_with_opts(topic, JoinOptions::with_bootstrap(node_ids))
+            .split();
 
         let ctx = ctx.clone();
-        let gossip = self.gossip.clone();
         let subscribe_loop = tokio::spawn(async move {
-            if let Err(e) = subscribe_loop(&ctx, gossip, topic, msg_id).await {
+            if let Err(e) = subscribe_loop(&ctx, gossip_receiver, topic, msg_id, join_tx).await {
                 warn!(ctx, "subscribe_loop failed: {e}")
             }
         });
 
-        iroh_channels.insert(topic, ChannelState::new(seq, subscribe_loop));
+        iroh_channels.insert(topic, ChannelState::new(subscribe_loop, gossip_sender));
 
-        Ok(Some(connect_future))
+        Ok(Some(join_rx))
     }
 
     /// Add gossip peers to realtime channel if it is already active.
     pub async fn maybe_add_gossip_peers(&self, topic: TopicId, peers: Vec<NodeAddr>) -> Result<()> {
-        if let Some(state) = self.iroh_channels.read().await.get(&topic) {
-            if state.subscribe_loop.is_some() {
-                for peer in &peers {
-                    self.endpoint.add_node_addr(peer.clone())?;
-                }
-                self.gossip
-                    .join(topic, peers.into_iter().map(|peer| peer.node_id).collect())
-                    .await?;
+        if self.iroh_channels.read().await.get(&topic).is_some() {
+            for peer in &peers {
+                self.endpoint.add_node_addr(peer.clone())?;
             }
+
+            self.gossip
+                .join(topic, peers.into_iter().map(|peer| peer.node_id).collect())
+                .await?;
         }
         Ok(())
     }
@@ -159,11 +162,16 @@ impl Iroh {
             .with_context(|| format!("Message {msg_id} has no gossip topic"))?;
         self.join_and_subscribe_gossip(ctx, msg_id).await?;
 
-        let seq_num = self.get_and_incr(&topic).await;
+        let seq_num = self.get_and_incr(&topic);
+
+        let mut iroh_channels = self.iroh_channels.write().await;
+        let state = iroh_channels
+            .get_mut(&topic)
+            .context("Just created state does not exist")?;
         data.extend(seq_num.to_le_bytes());
         data.extend(self.public_key.as_bytes());
 
-        self.gossip.broadcast(topic, data.into()).await?;
+        state.sender.broadcast(data.into()).await?;
 
         if env::var("REALTIME_DEBUG").is_ok() {
             info!(ctx, "Sent realtime data");
@@ -172,30 +180,33 @@ impl Iroh {
         Ok(())
     }
 
-    async fn get_and_incr(&self, topic: &TopicId) -> i32 {
-        let mut seq = 0;
-        if let Some(state) = self.iroh_channels.write().await.get_mut(topic) {
-            seq = state.seq_number;
-            state.seq_number = state.seq_number.wrapping_add(1)
-        }
-        seq
+    fn get_and_incr(&self, topic: &TopicId) -> i32 {
+        let mut sequence_numbers = self.sequence_numbers.lock();
+        let entry = sequence_numbers.entry(*topic).or_default();
+        *entry = entry.wrapping_add(1);
+        *entry
     }
 
     /// Get the iroh [NodeAddr] without direct IP addresses.
     pub(crate) async fn get_node_addr(&self) -> Result<NodeAddr> {
-        let mut addr = self.endpoint.my_addr().await?;
+        let mut addr = self.endpoint.node_addr().await?;
         addr.info.direct_addresses = BTreeSet::new();
         Ok(addr)
     }
 
     /// Leave the realtime channel for a given topic.
     pub(crate) async fn leave_realtime(&self, topic: TopicId) -> Result<()> {
-        if let Some(channel) = &mut self.iroh_channels.write().await.get_mut(&topic) {
-            if let Some(subscribe_loop) = channel.subscribe_loop.take() {
-                subscribe_loop.abort();
-            }
+        if let Some(channel) = self.iroh_channels.write().await.remove(&topic) {
+            // Dropping the last GossipTopic results in quitting the topic.
+            // It is split into GossipReceiver and GossipSender.
+            // GossipSender (`channel.sender`) is dropped automatically.
+
+            // Subscribe loop owns GossipReceiver.
+            // Aborting it and waiting for it to be dropped
+            // drops the receiver.
+            channel.subscribe_loop.abort();
+            let _ = channel.subscribe_loop.await;
         }
-        self.gossip.quit(topic).await?;
         Ok(())
     }
 }
@@ -203,23 +214,23 @@ impl Iroh {
 /// Single gossip channel state.
 #[derive(Debug)]
 pub(crate) struct ChannelState {
-    /// Sequence number for the gossip channel.
-    seq_number: i32,
     /// The subscribe loop handle.
-    subscribe_loop: Option<JoinHandle<()>>,
+    subscribe_loop: JoinHandle<()>,
+
+    sender: iroh_gossip::net::GossipSender,
 }
 
 impl ChannelState {
-    fn new(seq_number: i32, subscribe_loop: JoinHandle<()>) -> Self {
+    fn new(subscribe_loop: JoinHandle<()>, sender: iroh_gossip::net::GossipSender) -> Self {
         Self {
-            seq_number,
-            subscribe_loop: Some(subscribe_loop),
+            subscribe_loop,
+            sender,
         }
     }
 }
 
 impl Context {
-    /// Create magic endpoint and gossip.
+    /// Create iroh endpoint and gossip.
     async fn init_peer_channels(&self) -> Result<Iroh> {
         let secret_key = SecretKey::generate();
         let public_key = secret_key.public();
@@ -246,7 +257,7 @@ impl Context {
             .await?;
 
         // create gossip
-        let my_addr = endpoint.my_addr().await?;
+        let my_addr = endpoint.node_addr().await?;
         let gossip = Gossip::from_endpoint(endpoint.clone(), Default::default(), &my_addr.info);
 
         // spawn endpoint loop that forwards incoming connections to the gossiper
@@ -254,10 +265,12 @@ impl Context {
 
         // Shuts down on deltachat shutdown
         tokio::spawn(endpoint_loop(context, endpoint.clone(), gossip.clone()));
+        tokio::spawn(gossip_direct_address_loop(endpoint.clone(), gossip.clone()));
 
         Ok(Iroh {
             endpoint,
             gossip,
+            sequence_numbers: Mutex::new(HashMap::new()),
             iroh_channels: RwLock::new(HashMap::new()),
             public_key,
         })
@@ -272,6 +285,15 @@ impl Context {
     }
 }
 
+/// Loop to update direct addresses of the gossip.
+async fn gossip_direct_address_loop(endpoint: Endpoint, gossip: Gossip) -> Result<()> {
+    let mut stream = endpoint.direct_addresses();
+    while let Some(addrs) = stream.next().await {
+        gossip.update_direct_addresses(&addrs)?;
+    }
+    Ok(())
+}
+
 /// Cache a peers [NodeId] for one topic.
 pub(crate) async fn iroh_add_peer_for_topic(
     ctx: &Context,
@@ -358,7 +380,7 @@ pub(crate) async fn get_iroh_topic_for_msg(
 pub async fn send_webxdc_realtime_advertisement(
     ctx: &Context,
     msg_id: MsgId,
-) -> Result<Option<JoinTopicFut>> {
+) -> Result<Option<oneshot::Receiver<()>>> {
     if !ctx.get_config_bool(Config::WebxdcRealtimeEnabled).await? {
         return Ok(None);
     }
@@ -440,11 +462,11 @@ async fn handle_connection(
     let conn = conn.await?;
     let peer_id = iroh_net::endpoint::get_remote_node_id(&conn)?;
 
-    match alpn.as_bytes() {
+    match alpn.as_slice() {
         GOSSIP_ALPN => gossip
             .handle_connection(conn)
             .await
-            .context(format!("Connection to {peer_id} with ALPN {alpn} failed"))?,
+            .context(format!("Gossip connection to {peer_id} failed"))?,
         _ => warn!(
             context,
             "Ignoring connection from {peer_id}: unsupported ALPN protocol"
@@ -455,32 +477,50 @@ async fn handle_connection(
 
 async fn subscribe_loop(
     context: &Context,
-    gossip: Gossip,
+    mut stream: iroh_gossip::net::GossipReceiver,
     topic: TopicId,
     msg_id: MsgId,
+    join_tx: oneshot::Sender<()>,
 ) -> Result<()> {
-    let mut stream = gossip.subscribe(topic).await?;
-    loop {
-        let event = stream.recv().await?;
+    let mut join_tx = Some(join_tx);
+
+    while let Some(event) = stream.try_next().await? {
         match event {
-            IrohEvent::NeighborUp(node) => {
-                info!(context, "IROH_REALTIME: NeighborUp: {}", node.to_string());
-                iroh_add_peer_for_topic(context, msg_id, topic, node, None).await?;
+            Event::Gossip(event) => match event {
+                GossipEvent::Joined(nodes) => {
+                    if let Some(join_tx) = join_tx.take() {
+                        // Try to notify that at least one peer joined,
+                        // but ignore the error if receiver is dropped and nobody listens.
+                        join_tx.send(()).ok();
+                    }
+
+                    for node in nodes {
+                        iroh_add_peer_for_topic(context, msg_id, topic, node, None).await?;
+                    }
+                }
+                GossipEvent::NeighborUp(node) => {
+                    info!(context, "IROH_REALTIME: NeighborUp: {}", node.to_string());
+                    iroh_add_peer_for_topic(context, msg_id, topic, node, None).await?;
+                }
+                GossipEvent::NeighborDown(_node) => {}
+                GossipEvent::Received(message) => {
+                    info!(context, "IROH_REALTIME: Received realtime data");
+                    context.emit_event(EventType::WebxdcRealtimeData {
+                        msg_id,
+                        data: message
+                            .content
+                            .get(0..message.content.len() - 4 - PUBLIC_KEY_LENGTH)
+                            .context("too few bytes in iroh message")?
+                            .into(),
+                    });
+                }
+            },
+            Event::Lagged => {
+                warn!(context, "Gossip lost some messages");
             }
-            IrohEvent::Received(event) => {
-                info!(context, "IROH_REALTIME: Received realtime data");
-                context.emit_event(EventType::WebxdcRealtimeData {
-                    msg_id,
-                    data: event
-                        .content
-                        .get(0..event.content.len() - 4 - PUBLIC_KEY_LENGTH)
-                        .context("too few bytes in iroh message")?
-                        .into(),
-                });
-            }
-            _ => (),
         };
     }
+    Ok(())
 }
 
 #[cfg(test)]
@@ -528,10 +568,10 @@ mod tests {
         assert_eq!(alice_webxdc.get_viewtype(), Viewtype::Webxdc);
 
         let webxdc = alice.pop_sent_msg().await;
-        let bob_webdxc = bob.recv_msg(&webxdc).await;
-        assert_eq!(bob_webdxc.get_viewtype(), Viewtype::Webxdc);
+        let bob_webxdc = bob.recv_msg(&webxdc).await;
+        assert_eq!(bob_webxdc.get_viewtype(), Viewtype::Webxdc);
 
-        bob_webdxc.chat_id.accept(bob).await.unwrap();
+        bob_webxdc.chat_id.accept(bob).await.unwrap();
 
         // Alice advertises herself.
         send_webxdc_realtime_advertisement(alice, alice_webxdc.id)
@@ -542,7 +582,7 @@ mod tests {
         let bob_iroh = bob.get_or_try_init_peer_channel().await.unwrap();
 
         // Bob adds alice to gossip peers.
-        let members = get_iroh_gossip_peers(bob, bob_webdxc.id)
+        let members = get_iroh_gossip_peers(bob, bob_webxdc.id)
             .await
             .unwrap()
             .into_iter()
@@ -556,7 +596,7 @@ mod tests {
         );
 
         bob_iroh
-            .join_and_subscribe_gossip(bob, bob_webdxc.id)
+            .join_and_subscribe_gossip(bob, bob_webxdc.id)
             .await
             .unwrap()
             .unwrap()
@@ -584,7 +624,7 @@ mod tests {
         }
         // Bob sends ephemeral message
         bob_iroh
-            .send_webxdc_realtime_data(bob, bob_webdxc.id, "bob -> alice".as_bytes().to_vec())
+            .send_webxdc_realtime_data(bob, bob_webxdc.id, "bob -> alice".as_bytes().to_vec())
             .await
             .unwrap();
 
@@ -616,7 +656,7 @@ mod tests {
         );
 
         bob_iroh
-            .send_webxdc_realtime_data(bob, bob_webdxc.id, "bob -> alice 2".as_bytes().to_vec())
+            .send_webxdc_realtime_data(bob, bob_webxdc.id, "bob -> alice 2".as_bytes().to_vec())
             .await
             .unwrap();
 
@@ -674,10 +714,10 @@ mod tests {
         assert_eq!(alice_webxdc.get_viewtype(), Viewtype::Webxdc);
 
         let webxdc = alice.pop_sent_msg().await;
-        let bob_webdxc = bob.recv_msg(&webxdc).await;
-        assert_eq!(bob_webdxc.get_viewtype(), Viewtype::Webxdc);
+        let bob_webxdc = bob.recv_msg(&webxdc).await;
+        assert_eq!(bob_webxdc.get_viewtype(), Viewtype::Webxdc);
 
-        bob_webdxc.chat_id.accept(bob).await.unwrap();
+        bob_webxdc.chat_id.accept(bob).await.unwrap();
 
         // Alice advertises herself.
         send_webxdc_realtime_advertisement(alice, alice_webxdc.id)
@@ -688,7 +728,7 @@ mod tests {
         let bob_iroh = bob.get_or_try_init_peer_channel().await.unwrap();
 
         // Bob adds alice to gossip peers.
-        let members = get_iroh_gossip_peers(bob, bob_webdxc.id)
+        let members = get_iroh_gossip_peers(bob, bob_webxdc.id)
             .await
             .unwrap()
             .into_iter()
@@ -702,7 +742,7 @@ mod tests {
         );
 
         bob_iroh
-            .join_and_subscribe_gossip(bob, bob_webdxc.id)
+            .join_and_subscribe_gossip(bob, bob_webxdc.id)
             .await
             .unwrap()
             .unwrap()
@@ -729,11 +769,32 @@ mod tests {
             }
         }
 
-        // TODO: check that seq number is persisted
-        leave_webxdc_realtime(bob, bob_webdxc.id).await.unwrap();
+        let bob_topic = get_iroh_topic_for_msg(bob, bob_webxdc.id)
+            .await
+            .unwrap()
+            .unwrap();
+        let bob_sequence_number = bob
+            .iroh
+            .get()
+            .unwrap()
+            .sequence_numbers
+            .lock()
+            .get(&bob_topic)
+            .copied();
+        leave_webxdc_realtime(bob, bob_webxdc.id).await.unwrap();
+        let bob_sequence_number_after = bob
+            .iroh
+            .get()
+            .unwrap()
+            .sequence_numbers
+            .lock()
+            .get(&bob_topic)
+            .copied();
+        // Check that sequence number is persisted when leaving the channel.
+        assert_eq!(bob_sequence_number, bob_sequence_number_after);
 
         bob_iroh
-            .join_and_subscribe_gossip(bob, bob_webdxc.id)
+            .join_and_subscribe_gossip(bob, bob_webxdc.id)
             .await
             .unwrap()
             .unwrap()
@@ -741,7 +802,7 @@ mod tests {
             .unwrap();
 
         bob_iroh
-            .send_webxdc_realtime_data(bob, bob_webdxc.id, "bob -> alice".as_bytes().to_vec())
+            .send_webxdc_realtime_data(bob, bob_webxdc.id, "bob -> alice".as_bytes().to_vec())
             .await
             .unwrap();
 
@@ -771,7 +832,7 @@ mod tests {
             .await
             .unwrap()
             .unwrap();
-        assert!(if let Some(state) = alice
+        assert!(alice
             .iroh
             .get()
             .unwrap()
@@ -779,11 +840,7 @@ mod tests {
             .read()
             .await
             .get(&topic)
-        {
-            state.subscribe_loop.is_none()
-        } else {
-            false
-        });
+            .is_none());
     }
 
     #[tokio::test(flavor = "multi_thread", worker_threads = 2)]

src/provider/data.rs

@@ -520,7 +520,7 @@ static P_FREENET_DE: Provider = Provider {
 static P_GMAIL: Provider = Provider {
     id: "gmail",
     status: Status::Preparation,
-    before_login_hint: "For Gmail accounts, you need to create an app-password if you have \"2-Step Verification\" enabled. If this setting is not available, you need to enable \"less secure apps\".",
+    before_login_hint: "For Gmail accounts, you need to have \"2-Step Verification\" enabled and create an app-password.",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/gmail",
     server: &[
@@ -1037,6 +1037,20 @@ static P_NINE_TESTRUN_ORG: Provider = Provider {
             port: 587,
             username_pattern: Email,
         },
+        Server {
+            protocol: Imap,
+            socket: Ssl,
+            hostname: "nine.testrun.org",
+            port: 443,
+            username_pattern: Email,
+        },
+        Server {
+            protocol: Smtp,
+            socket: Ssl,
+            hostname: "nine.testrun.org",
+            port: 443,
+            username_pattern: Email,
+        },
     ],
     opt: ProviderOptions::new(),
     config_defaults: Some(&[ConfigDefault {
@@ -1260,14 +1274,14 @@ static P_RISEUP_NET: Provider = Provider {
             socket: Ssl,
             hostname: "mail.riseup.net",
             port: 993,
-            username_pattern: Emaillocalpart,
+            username_pattern: Email,
         },
         Server {
             protocol: Smtp,
             socket: Ssl,
             hostname: "mail.riseup.net",
             port: 465,
-            username_pattern: Emaillocalpart,
+            username_pattern: Email,
         },
     ],
     opt: ProviderOptions::new(),
@@ -1301,6 +1315,37 @@ static P_SONIC: Provider = Provider {
     oauth2_authorizer: None,
 };
 
+// stinpriza.net.md: stinpriza.net, stinpriza.eu, el-hoyo.net
+static P_STINPRIZA_NET: Provider = Provider {
+    id: "stinpriza.net",
+    status: Status::Ok,
+    before_login_hint: "",
+    after_login_hint: "",
+    overview_page: "https://providers.delta.chat/stinpriza-net",
+    server: &[
+        Server {
+            protocol: Imap,
+            socket: Starttls,
+            hostname: "stinpriza.net",
+            port: 143,
+            username_pattern: Email,
+        },
+        Server {
+            protocol: Smtp,
+            socket: Starttls,
+            hostname: "stinpriza.net",
+            port: 587,
+            username_pattern: Email,
+        },
+    ],
+    opt: ProviderOptions {
+        strict_tls: true,
+        ..ProviderOptions::new()
+    },
+    config_defaults: None,
+    oauth2_authorizer: None,
+};
+
 // systemausfall.org.md: systemausfall.org, solidaris.me
 static P_SYSTEMAUSFALL_ORG: Provider = Provider {
     id: "systemausfall.org",
@@ -1555,11 +1600,13 @@ static P_VIVALDI: Provider = Provider {
 // vk.com.md: vk.com
 static P_VK_COM: Provider = Provider {
     id: "vk.com",
-    status: Status::Broken,
-    before_login_hint: "К сожалению, VK Почта не поддерживает работу с Delta Chat. См. https://help.vk.mail.ru/vkmail/questions/client",
+    status: Status::Preparation,
+    before_login_hint: "Вам необходимо сгенерировать \"пароль для внешнего приложения\" в веб-интерфейсе mail.ru https://account.mail.ru/user/2-step-auth/passwords/ чтобы vk.com работал с Delta Chat.",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/vk-com",
     server: &[
+        Server { protocol: Imap, socket: Ssl, hostname: "imap.mail.ru", port: 993, username_pattern: Email },
+        Server { protocol: Smtp, socket: Ssl, hostname: "smtp.mail.ru", port: 465, username_pattern: Email },
     ],
     opt: ProviderOptions::new(),
     config_defaults: None,
@@ -1757,7 +1804,7 @@ static P_ZOHO: Provider = Provider {
     oauth2_authorizer: None,
 };
 
-pub(crate) static PROVIDER_DATA: [(&str, &Provider); 528] = [
+pub(crate) static PROVIDER_DATA: [(&str, &Provider); 531] = [
     ("163.com", &P_163),
     ("aktivix.org", &P_AKTIVIX_ORG),
     ("aliyun.com", &P_ALIYUN),
@@ -2212,6 +2259,9 @@ pub(crate) static PROVIDER_DATA: [(&str, &Provider); 528] = [
     ("riseup.net", &P_RISEUP_NET),
     ("rogers.com", &P_ROGERS_COM),
     ("sonic.net", &P_SONIC),
+    ("stinpriza.net", &P_STINPRIZA_NET),
+    ("stinpriza.eu", &P_STINPRIZA_NET),
+    ("el-hoyo.net", &P_STINPRIZA_NET),
     ("systemausfall.org", &P_SYSTEMAUSFALL_ORG),
     ("solidaris.me", &P_SYSTEMAUSFALL_ORG),
     ("systemli.org", &P_SYSTEMLI_ORG),
@@ -2343,6 +2393,7 @@ pub(crate) static PROVIDER_IDS: Lazy<HashMap<&'static str, &'static Provider>> =
         ("riseup.net", &P_RISEUP_NET),
         ("rogers.com", &P_ROGERS_COM),
         ("sonic", &P_SONIC),
+        ("stinpriza.net", &P_STINPRIZA_NET),
         ("systemausfall.org", &P_SYSTEMAUSFALL_ORG),
         ("systemli.org", &P_SYSTEMLI_ORG),
         ("t-online", &P_T_ONLINE),
@@ -2366,4 +2417,4 @@ pub(crate) static PROVIDER_IDS: Lazy<HashMap<&'static str, &'static Provider>> =
 });
 
 pub static _PROVIDER_UPDATED: Lazy<chrono::NaiveDate> =
-    Lazy::new(|| chrono::NaiveDate::from_ymd_opt(2024, 6, 24).unwrap());
+    Lazy::new(|| chrono::NaiveDate::from_ymd_opt(2024, 8, 14).unwrap());

src/push.rs

@@ -48,7 +48,7 @@ impl PushSubscriber {
 
     /// Subscribes for heartbeat notifications with previously set device token.
     #[cfg(target_os = "ios")]
-    pub(crate) async fn subscribe(&self) -> Result<()> {
+    pub(crate) async fn subscribe(&self, context: &Context) -> Result<()> {
         use crate::net::http;
 
         let mut state = self.inner.write().await;
@@ -61,8 +61,9 @@ impl PushSubscriber {
             return Ok(());
         };
 
-        let socks5_config = None;
-        let response = http::get_client(socks5_config)?
+        let load_cache = true;
+        let response = http::get_client(context, load_cache)
+            .await?
             .post("https://notifications.delta.chat/register")
             .body(format!("{{\"token\":\"{token}\"}}"))
             .send()
@@ -77,7 +78,7 @@ impl PushSubscriber {
 
     /// Placeholder to skip subscribing to heartbeat notifications outside iOS.
     #[cfg(not(target_os = "ios"))]
-    pub(crate) async fn subscribe(&self) -> Result<()> {
+    pub(crate) async fn subscribe(&self, _context: &Context) -> Result<()> {
         let mut state = self.inner.write().await;
         state.heartbeat_subscribed = true;
         Ok(())

src/qr.rs

@@ -20,7 +20,6 @@ use crate::events::EventType;
 use crate::key::Fingerprint;
 use crate::message::Message;
 use crate::peerstate::Peerstate;
-use crate::socks::Socks5Config;
 use crate::token;
 use crate::tools::validate_id;
 use iroh_old as iroh;
@@ -37,8 +36,13 @@ const VCARD_SCHEME: &str = "BEGIN:VCARD";
 const SMTP_SCHEME: &str = "SMTP:";
 const HTTP_SCHEME: &str = "http://";
 const HTTPS_SCHEME: &str = "https://";
+
+/// Legacy backup transfer based on iroh 0.4.
 pub(crate) const DCBACKUP_SCHEME: &str = "DCBACKUP:";
 
+/// Backup transfer based on iroh-net.
+pub(crate) const DCBACKUP2_SCHEME: &str = "DCBACKUP2:";
+
 /// Scanned QR code.
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub enum Qr {
@@ -106,7 +110,7 @@ pub enum Qr {
         domain: String,
     },
 
-    /// Provides a backup that can be retrieve.
+    /// Provides a backup that can be retrieved using legacy iroh 0.4.
     ///
     /// This contains all the data needed to connect to a device and download a backup from
     /// it to configure the receiving device with the same account.
@@ -120,6 +124,15 @@ pub enum Qr {
         ticket: iroh::provider::Ticket,
     },
 
+    /// Provides a backup that can be retrieved using iroh-net based backup transfer protocol.
+    Backup2 {
+        /// Iroh node address.
+        node_addr: iroh_net::NodeAddr,
+
+        /// Authentication token.
+        auth_token: String,
+    },
+
     /// Ask the user if they want to use the given service for video chats.
     WebrtcInstance {
         /// Server domain name.
@@ -266,6 +279,8 @@ pub async fn check_qr(context: &Context, qr: &str) -> Result<Qr> {
         decode_webrtc_instance(context, qr)?
     } else if starts_with_ignore_case(qr, DCBACKUP_SCHEME) {
         decode_backup(qr)?
+    } else if starts_with_ignore_case(qr, DCBACKUP2_SCHEME) {
+        decode_backup2(qr)?
     } else if qr.starts_with(MAILTO_SCHEME) {
         decode_mailto(context, qr).await?
     } else if qr.starts_with(SMTP_SCHEME) {
@@ -295,6 +310,13 @@ pub async fn check_qr(context: &Context, qr: &str) -> Result<Qr> {
 pub fn format_backup(qr: &Qr) -> Result<String> {
     match qr {
         Qr::Backup { ref ticket } => Ok(format!("{DCBACKUP_SCHEME}{ticket}")),
+        Qr::Backup2 {
+            ref node_addr,
+            ref auth_token,
+        } => {
+            let node_addr = serde_json::to_string(node_addr)?;
+            Ok(format!("{DCBACKUP2_SCHEME}{auth_token}&{node_addr}"))
+        }
         _ => Err(anyhow!("Not a backup QR code")),
     }
 }
@@ -487,7 +509,7 @@ fn decode_account(qr: &str) -> Result<Qr> {
         Ok(Qr::Account {
             domain: url
                 .host_str()
-                .context("can't extract WebRTC instance domain")?
+                .context("can't extract account setup domain")?
                 .to_string(),
         })
     } else {
@@ -529,6 +551,24 @@ fn decode_backup(qr: &str) -> Result<Qr> {
     Ok(Qr::Backup { ticket })
 }
 
+/// Decodes a [`DCBACKUP2_SCHEME`] QR code.
+fn decode_backup2(qr: &str) -> Result<Qr> {
+    let payload = qr
+        .strip_prefix(DCBACKUP2_SCHEME)
+        .ok_or_else(|| anyhow!("invalid DCBACKUP scheme"))?;
+    let (auth_token, node_addr) = payload
+        .split_once('&')
+        .context("Backup QR code has no separator")?;
+    let auth_token = auth_token.to_string();
+    let node_addr = serde_json::from_str::<iroh_net::NodeAddr>(node_addr)
+        .context("Invalid node addr in backup QR code")?;
+
+    Ok(Qr::Backup2 {
+        node_addr,
+        auth_token,
+    })
+}
+
 #[derive(Debug, Deserialize)]
 struct CreateAccountSuccessResponse {
     /// Email address.
@@ -549,8 +589,16 @@ struct CreateAccountErrorResponse {
 #[allow(clippy::indexing_slicing)]
 async fn set_account_from_qr(context: &Context, qr: &str) -> Result<()> {
     let url_str = &qr[DCACCOUNT_SCHEME.len()..];
-    let socks5_config = Socks5Config::from_database(&context.sql).await?;
-    let response = crate::net::http::get_client(socks5_config)?
+
+    if !url_str.starts_with(HTTPS_SCHEME) {
+        bail!("DCACCOUNT QR codes must use HTTPS scheme");
+    }
+
+    // As only HTTPS is used, it is safe to load DNS cache.
+    let load_cache = true;
+
+    let response = crate::net::http::get_client(context, load_cache)
+        .await?
         .post(url_str)
         .send()
         .await?;
@@ -611,7 +659,6 @@ pub async fn set_config_from_qr(context: &Context, qr: &str) -> Result<()> {
             context
                 .sync_qr_code_token_deletion(invitenumber, authcode)
                 .await?;
-            context.send_sync_msg().await?;
         }
         Qr::WithdrawVerifyGroup {
             invitenumber,
@@ -623,7 +670,6 @@ pub async fn set_config_from_qr(context: &Context, qr: &str) -> Result<()> {
             context
                 .sync_qr_code_token_deletion(invitenumber, authcode)
                 .await?;
-            context.send_sync_msg().await?;
         }
         Qr::ReviveVerifyContact {
             invitenumber,
@@ -633,7 +679,7 @@ pub async fn set_config_from_qr(context: &Context, qr: &str) -> Result<()> {
             token::save(context, token::Namespace::InviteNumber, None, &invitenumber).await?;
             token::save(context, token::Namespace::Auth, None, &authcode).await?;
             context.sync_qr_code_tokens(None).await?;
-            context.send_sync_msg().await?;
+            context.scheduler.interrupt_smtp().await;
         }
         Qr::ReviveVerifyGroup {
             invitenumber,
@@ -653,7 +699,7 @@ pub async fn set_config_from_qr(context: &Context, qr: &str) -> Result<()> {
             .await?;
             token::save(context, token::Namespace::Auth, chat_id, &authcode).await?;
             context.sync_qr_code_tokens(chat_id).await?;
-            context.send_sync_msg().await?;
+            context.scheduler.interrupt_smtp().await;
         }
         Qr::Login { address, options } => {
             configure_from_login_qr(context, &address, options).await?
@@ -1359,9 +1405,12 @@ mod tests {
             ctx.ctx.get_config(Config::SendUser).await?,
             Some("SendUser".to_owned())
         );
+
+        // `sc` option is actually ignored and `ic` is used instead
+        // because `smtp_certificate_checks` is deprecated.
         assert_eq!(
             ctx.ctx.get_config(Config::SmtpCertificateChecks).await?,
-            Some("3".to_owned())
+            Some("1".to_owned())
         );
         assert_eq!(
             ctx.ctx.get_config(Config::SendSecurity).await?,

src/qr/dclogin_scheme.rs

@@ -39,9 +39,6 @@ pub enum LoginOptions {
         /// IMAP socket security.
         imap_security: Option<Socket>,
 
-        /// IMAP certificate checks.
-        imap_certificate_checks: Option<CertificateChecks>,
-
         /// SMTP host.
         smtp_host: Option<String>,
 
@@ -57,8 +54,8 @@ pub enum LoginOptions {
         /// SMTP socket security.
         smtp_security: Option<Socket>,
 
-        /// SMTP certificate checks.
-        smtp_certificate_checks: Option<CertificateChecks>,
+        /// Certificate checks.
+        certificate_checks: Option<CertificateChecks>,
     },
 }
 
@@ -107,14 +104,13 @@ pub(super) fn decode_login(qr: &str) -> Result<Qr> {
                 imap_username: parameter_map.get("iu").map(|s| s.to_owned()),
                 imap_password: parameter_map.get("ipw").map(|s| s.to_owned()),
                 imap_security: parse_socket_security(parameter_map.get("is"))?,
-                imap_certificate_checks: parse_certificate_checks(parameter_map.get("ic"))?,
                 smtp_host: parameter_map.get("sh").map(|s| s.to_owned()),
                 smtp_port: parse_port(parameter_map.get("sp"))
                     .context("could not parse smtp port")?,
                 smtp_username: parameter_map.get("su").map(|s| s.to_owned()),
                 smtp_password: parameter_map.get("spw").map(|s| s.to_owned()),
                 smtp_security: parse_socket_security(parameter_map.get("ss"))?,
-                smtp_certificate_checks: parse_certificate_checks(parameter_map.get("sc"))?,
+                certificate_checks: parse_certificate_checks(parameter_map.get("ic"))?,
             },
             Some(Ok(v)) => LoginOptions::UnsuportedVersion(v),
             Some(Err(_)) => bail!("version could not be parsed as number E6"),
@@ -177,13 +173,12 @@ pub(crate) async fn configure_from_login_qr(
             imap_username,
             imap_password,
             imap_security,
-            imap_certificate_checks,
             smtp_host,
             smtp_port,
             smtp_username,
             smtp_password,
             smtp_security,
-            smtp_certificate_checks,
+            certificate_checks,
         } => {
             context
                 .set_config_internal(Config::MailPw, Some(&mail_pw))
@@ -216,14 +211,6 @@ pub(crate) async fn configure_from_login_qr(
                     .set_config_internal(Config::MailSecurity, Some(&code.to_string()))
                     .await?;
             }
-            if let Some(value) = imap_certificate_checks {
-                let code = value
-                    .to_u32()
-                    .context("could not convert imap certificate checks value to number")?;
-                context
-                    .set_config_internal(Config::ImapCertificateChecks, Some(&code.to_string()))
-                    .await?;
-            }
             if let Some(value) = smtp_host {
                 context
                     .set_config_internal(Config::SendServer, Some(&value))
@@ -252,10 +239,13 @@ pub(crate) async fn configure_from_login_qr(
                     .set_config_internal(Config::SendSecurity, Some(&code.to_string()))
                     .await?;
             }
-            if let Some(value) = smtp_certificate_checks {
+            if let Some(value) = certificate_checks {
                 let code = value
                     .to_u32()
-                    .context("could not convert smtp certificate checks value to number")?;
+                    .context("could not convert certificate checks value to number")?;
+                context
+                    .set_config_internal(Config::ImapCertificateChecks, Some(&code.to_string()))
+                    .await?;
                 context
                     .set_config_internal(Config::SmtpCertificateChecks, Some(&code.to_string()))
                     .await?;
@@ -284,13 +274,12 @@ mod test {
                 imap_username: None,
                 imap_password: None,
                 imap_security: None,
-                imap_certificate_checks: None,
                 smtp_host: None,
                 smtp_port: None,
                 smtp_username: None,
                 smtp_password: None,
                 smtp_security: None,
-                smtp_certificate_checks: None,
+                certificate_checks: None,
             }
         };
     }
@@ -392,13 +381,12 @@ mod test {
                     imap_username: Some("max".to_owned()),
                     imap_password: Some("87654".to_owned()),
                     imap_security: Some(Socket::Ssl),
-                    imap_certificate_checks: Some(CertificateChecks::Strict),
                     smtp_host: Some("mail.host.tld".to_owned()),
                     smtp_port: Some(3000),
                     smtp_username: Some("max@host.tld".to_owned()),
                     smtp_password: Some("3242HS".to_owned()),
                     smtp_security: Some(Socket::Plain),
-                    smtp_certificate_checks: Some(CertificateChecks::AcceptInvalidCertificates),
+                    certificate_checks: Some(CertificateChecks::Strict),
                 }
             );
         } else {

src/qr_code_generator.rs

@@ -58,7 +58,7 @@ async fn generate_verification_qr(context: &Context) -> Result<String> {
     )
 }
 
-/// Renders a [`Qr::Backup`] QR code as an SVG image.
+/// Renders a [`Qr::Backup2`] QR code as an SVG image.
 pub async fn generate_backup_qr(context: &Context, qr: &Qr) -> Result<String> {
     let content = qr::format_backup(qr)?;
     let (avatar, displayname, _addr, color) = self_info(context).await?;

src/receive_imf.rs

@@ -632,9 +632,9 @@ pub(crate) async fn receive_imf_inner(
 /// Also returns whether it is blocked or not and its origin.
 ///
 /// * `prevent_rename`: if true, the display_name of this contact will not be changed. Useful for
-/// mailing lists: In some mailing lists, many users write from the same address but with different
-/// display names. We don't want the display name to change every time the user gets a new email from
-/// a mailing list.
+///   mailing lists: In some mailing lists, many users write from the same address but with different
+///   display names. We don't want the display name to change every time the user gets a new email from
+///   a mailing list.
 ///
 /// Returns `None` if From field does not contain a valid contact address.
 pub async fn from_field_to_contact_id(
@@ -807,7 +807,7 @@ async fn add_parts(
                         // 1:1 chat is blocked, but the contact is not.
                         // This happens when 1:1 chat is hidden
                         // during scanning of a group invitation code.
-                        Blocked::Request
+                        create_blocked_default
                     }
                 }
             }
@@ -1664,7 +1664,13 @@ RETURNING id
         replace_msg_id.trash(context, on_server).await?;
     }
 
-    chat_id.unarchive_if_not_muted(context, state).await?;
+    let unarchive = match mime_parser.get_header(HeaderDef::ChatGroupMemberRemoved) {
+        Some(addr) => context.is_self_addr(addr).await?,
+        None => true,
+    };
+    if unarchive {
+        chat_id.unarchive_if_not_muted(context, state).await?;
+    }
 
     info!(
         context,
@@ -1824,7 +1830,7 @@ async fn lookup_chat_or_create_adhoc_group(
         Ok(Some((new_chat_id, new_chat_id_blocked)))
     } else if allow_creation {
         // Try to create an ad hoc group.
-        if let Some(new_chat_id) = create_adhoc_group(
+        create_adhoc_group(
             context,
             mime_parser,
             create_blocked,
@@ -1833,12 +1839,7 @@ async fn lookup_chat_or_create_adhoc_group(
             is_partial_download,
         )
         .await
-        .context("Could not create ad hoc group")?
-        {
-            Ok(Some((new_chat_id, create_blocked)))
-        } else {
-            Ok(None)
-        }
+        .context("Could not create ad hoc group")
     } else {
         Ok(None)
     }
@@ -2512,7 +2513,7 @@ async fn create_adhoc_group(
     from_id: ContactId,
     to_ids: &[ContactId],
     is_partial_download: bool,
-) -> Result<Option<ChatId>> {
+) -> Result<Option<(ChatId, Blocked)>> {
     if is_partial_download {
         // Partial download may be an encrypted message with protected Subject header.
         //
@@ -2551,7 +2552,16 @@ async fn create_adhoc_group(
         );
         return Ok(None);
     }
-
+    if mime_parser
+        .get_header(HeaderDef::ChatGroupMemberRemoved)
+        .is_some()
+    {
+        info!(
+            context,
+            "Message removes member from unknown ad-hoc group (TRASH)."
+        );
+        return Ok(Some((DC_CHAT_ID_TRASH, Blocked::Not)));
+    }
     if member_ids.len() < 3 {
         return Ok(None);
     }
@@ -2583,7 +2593,7 @@ async fn create_adhoc_group(
     chatlist_events::emit_chatlist_changed(context);
     chatlist_events::emit_chatlist_item_changed(context, new_chat_id);
 
-    Ok(Some(new_chat_id))
+    Ok(Some((new_chat_id, create_blocked)))
 }
 
 #[derive(Debug, PartialEq, Eq)]

src/receive_imf/tests.rs

@@ -14,6 +14,7 @@ use crate::contact;
 use crate::download::MIN_DOWNLOAD_LIMIT;
 use crate::imap::prefetch_should_download;
 use crate::imex::{imex, ImexMode};
+use crate::securejoin::get_securejoin_qr;
 use crate::test_utils::{get_chat_msg, mark_as_verified, TestContext, TestContextManager};
 use crate::tools::{time, SystemTime};
 
@@ -3275,6 +3276,46 @@ async fn test_auto_accept_group_for_bots() -> Result<()> {
     Ok(())
 }
 
+#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+async fn test_auto_accept_protected_group_for_bots() -> Result<()> {
+    let mut tcm = TestContextManager::new();
+    let alice = &tcm.alice().await;
+    let bob = &tcm.bob().await;
+    bob.set_config(Config::Bot, Some("1")).await.unwrap();
+    mark_as_verified(alice, bob).await;
+    mark_as_verified(bob, alice).await;
+    let group_id = alice
+        .create_group_with_members(ProtectionStatus::Protected, "Group", &[bob])
+        .await;
+    let sent = alice.send_text(group_id, "Hello!").await;
+    let msg = bob.recv_msg(&sent).await;
+    let chat = chat::Chat::load_from_db(bob, msg.chat_id).await?;
+    assert!(!chat.is_contact_request());
+    Ok(())
+}
+
+#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+async fn test_bot_accepts_another_group_after_qr_scan() -> Result<()> {
+    let mut tcm = TestContextManager::new();
+    let alice = &tcm.alice().await;
+    let bob = &tcm.bob().await;
+    bob.set_config(Config::Bot, Some("1")).await?;
+
+    let group_id = chat::create_group_chat(alice, ProtectionStatus::Protected, "Group").await?;
+    let qr = get_securejoin_qr(alice, Some(group_id)).await?;
+    tcm.exec_securejoin_qr(bob, alice, &qr).await;
+
+    let group_id = alice
+        .create_group_with_members(ProtectionStatus::Protected, "Group", &[bob])
+        .await;
+    let sent = alice.send_text(group_id, "Hello!").await;
+    let msg = bob.recv_msg(&sent).await;
+    let chat = chat::Chat::load_from_db(bob, msg.chat_id).await?;
+    assert!(!chat.is_contact_request());
+
+    Ok(())
+}
+
 #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
 async fn test_send_as_bot() -> Result<()> {
     let mut tcm = TestContextManager::new();
@@ -3559,6 +3600,39 @@ async fn test_prefer_encrypt_mutual_if_encrypted() -> Result<()> {
     Ok(())
 }
 
+#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+async fn test_forged_from_and_no_valid_signatures() -> Result<()> {
+    let t = &TestContext::new_bob().await;
+    let raw = include_bytes!("../../test-data/message/thunderbird_encrypted_signed.eml");
+    let received_msg = receive_imf(t, raw, false).await?.unwrap();
+    assert!(!received_msg.from_is_signed);
+    let msg = t.get_last_msg().await;
+    assert!(!msg.chat_id.is_trash());
+    assert!(!msg.get_showpadlock());
+
+    let t = &TestContext::new_bob().await;
+    let raw = String::from_utf8(raw.to_vec())?.replace("alice@example.org", "clarice@example.org");
+    let received_msg = receive_imf(t, raw.as_bytes(), false).await?.unwrap();
+    assert!(received_msg.chat_id.is_trash());
+
+    Ok(())
+}
+
+#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+async fn test_wrong_from_name_and_no_valid_signatures() -> Result<()> {
+    let t = &TestContext::new_bob().await;
+    let raw = include_bytes!("../../test-data/message/thunderbird_encrypted_signed.eml");
+    let raw = String::from_utf8(raw.to_vec())?.replace("From: Alice", "From: A");
+    let received_msg = receive_imf(t, raw.as_bytes(), false).await?.unwrap();
+    assert!(!received_msg.from_is_signed);
+    let msg = t.get_last_msg().await;
+    assert!(!msg.chat_id.is_trash());
+    assert!(!msg.get_showpadlock());
+    let contact = Contact::get_by_id(t, msg.from_id).await?;
+    assert_eq!(contact.get_authname(), "Alice");
+    Ok(())
+}
+
 #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
 async fn test_thunderbird_autocrypt_unencrypted() -> Result<()> {
     let t = TestContext::new_bob().await;
@@ -4658,6 +4732,67 @@ async fn test_protected_group_add_remove_member_missing_key() -> Result<()> {
     Ok(())
 }
 
+#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+async fn test_dont_create_adhoc_group_on_member_removal() -> Result<()> {
+    let mut tcm = TestContextManager::new();
+    let bob = &tcm.bob().await;
+    async fn get_chat_cnt(ctx: &Context) -> Result<usize> {
+        ctx.sql
+            .count("SELECT COUNT(*) FROM chats WHERE id>9", ())
+            .await
+    }
+    let chat_cnt = get_chat_cnt(bob).await?;
+    receive_imf(
+        bob,
+        b"From: Alice <alice@example.org>\n\
+To: <bob@example.net>, <charlie@example.com>\n\
+Chat-Version: 1.0\n\
+Subject: subject\n\
+Message-ID: <first@example.org>\n\
+Date: Sun, 14 Nov 2021 00:10:00 +0000\
+Content-Type: text/plain
+Chat-Group-Member-Removed: charlie@example.com",
+        false,
+    )
+    .await?;
+    assert_eq!(get_chat_cnt(bob).await?, chat_cnt);
+    Ok(())
+}
+
+#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+async fn test_unarchive_on_member_removal() -> Result<()> {
+    let mut tcm = TestContextManager::new();
+    let alice = &tcm.alice().await;
+    let bob = &tcm.bob().await;
+    let bob_id = Contact::create(alice, "", "bob@example.net").await?;
+    let fiona_id = Contact::create(alice, "", "fiona@example.net").await?;
+    let alice_chat_id = create_group_chat(alice, ProtectionStatus::Unprotected, "foos").await?;
+    add_contact_to_chat(alice, alice_chat_id, bob_id).await?;
+    add_contact_to_chat(alice, alice_chat_id, fiona_id).await?;
+
+    send_text_msg(alice, alice_chat_id, "populate".to_string()).await?;
+    let msg = alice.pop_sent_msg().await;
+    bob.recv_msg(&msg).await;
+    let bob_chat_id = bob.get_last_msg().await.chat_id;
+    bob_chat_id
+        .set_visibility(bob, ChatVisibility::Archived)
+        .await?;
+
+    remove_contact_from_chat(alice, alice_chat_id, fiona_id).await?;
+    let msg = alice.pop_sent_msg().await;
+    bob.recv_msg(&msg).await;
+    let bob_chat = Chat::load_from_db(bob, bob_chat_id).await?;
+    assert_eq!(bob_chat.get_visibility(), ChatVisibility::Archived);
+
+    remove_contact_from_chat(alice, alice_chat_id, bob_id).await?;
+    let msg = alice.pop_sent_msg().await;
+    bob.recv_msg(&msg).await;
+    let bob_chat = Chat::load_from_db(bob, bob_chat_id).await?;
+    assert_eq!(bob_chat.get_visibility(), ChatVisibility::Normal);
+
+    Ok(())
+}
+
 #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
 async fn test_forged_from() -> Result<()> {
     let mut tcm = TestContextManager::new();

src/scheduler.rs

@@ -110,13 +110,14 @@ impl SchedulerState {
         // to allow for clean shutdown.
         context.new_msgs_notify.notify_one();
 
-        if let Some(debug_logging) = context
+        let debug_logging = context
             .debug_logging
-            .read()
+            .write()
             .expect("RwLock is poisoned")
-            .as_ref()
-        {
+            .take();
+        if let Some(debug_logging) = debug_logging {
             debug_logging.loop_handle.abort();
+            debug_logging.loop_handle.await.ok();
         }
         let prev_state = std::mem::replace(&mut *inner, new_state);
         context.emit_event(EventType::ConnectivityChanged);
@@ -465,11 +466,13 @@ pub async fn convert_folder_meaning(
 }
 
 async fn inbox_fetch_idle(ctx: &Context, imap: &mut Imap, mut session: Session) -> Result<Session> {
-    ctx.set_config_internal(
-        Config::IsChatmail,
-        crate::config::from_bool(session.is_chatmail()),
-    )
-    .await?;
+    if !ctx.get_config_bool(Config::FixIsChatmail).await? {
+        ctx.set_config_internal(
+            Config::IsChatmail,
+            crate::config::from_bool(session.is_chatmail()),
+        )
+        .await?;
+    }
 
     // Update quota no more than once a minute.
     if ctx.quota_needs_update(60).await {
@@ -974,9 +977,16 @@ impl Scheduler {
             .await
             .log_err(context)
             .ok();
+
+        // Abort tasks, then await them to ensure the `Future` is dropped.
+        // Just aborting the task may keep resources such as `Context` clone
+        // moved into it indefinitely, resulting in database not being
+        // closed etc.
         self.ephemeral_handle.abort();
+        self.ephemeral_handle.await.ok();
         self.location_handle.abort();
-        self.recently_seen_loop.abort();
+        self.location_handle.await.ok();
+        self.recently_seen_loop.abort().await;
     }
 }
 

src/securejoin.rs

@@ -98,6 +98,7 @@ pub async fn get_securejoin_qr(context: &Context, group: Option<ChatId>) -> Resu
         let group_name_urlencoded = utf8_percent_encode(group_name, NON_ALPHANUMERIC).to_string();
         if sync_token {
             context.sync_qr_code_tokens(Some(chat.id)).await?;
+            context.scheduler.interrupt_smtp().await;
         }
         format!(
             "OPENPGP4FPR:{}#a={}&g={}&x={}&i={}&s={}",
@@ -112,6 +113,7 @@ pub async fn get_securejoin_qr(context: &Context, group: Option<ChatId>) -> Resu
         // parameters used: a=n=i=s=
         if sync_token {
             context.sync_qr_code_tokens(None).await?;
+            context.scheduler.interrupt_smtp().await;
         }
         format!(
             "OPENPGP4FPR:{}#a={}&n={}&i={}&s={}",
@@ -635,6 +637,10 @@ pub(crate) async fn observe_securejoin_on_other_device(
         return Ok(HandshakeMessage::Ignore);
     };
     peerstate.set_verified(key.clone(), fingerprint, addr)?;
+    if matches!(step, "vg-member-added" | "vc-contact-confirm") {
+        peerstate.backward_verified_key_id =
+            Some(context.get_config_i64(Config::KeyId).await?).filter(|&id| id > 0);
+    }
     peerstate.prefer_encrypt = EncryptPreference::Mutual;
     peerstate.save_to_db(&context.sql).await?;
 
@@ -841,6 +847,7 @@ mod tests {
         );
 
         let sent = bob.pop_sent_msg().await;
+        assert!(!sent.payload.contains("Bob Examplenet"));
         assert_eq!(sent.recipient(), EmailAddress::new(alice_addr).unwrap());
         let msg = alice.parse_msg(&sent).await;
         assert!(!msg.was_encrypted());
@@ -858,6 +865,7 @@ mod tests {
         );
 
         let sent = alice.pop_sent_msg().await;
+        assert!(!sent.payload.contains("Alice Exampleorg"));
         let msg = bob.parse_msg(&sent).await;
         assert!(msg.was_encrypted());
         assert_eq!(

src/smtp.rs

@@ -1,13 +1,11 @@
 //! # SMTP transport module.
 
+mod connect;
 pub mod send;
 
-use std::time::Duration;
-
 use anyhow::{bail, format_err, Context as _, Error, Result};
 use async_smtp::response::{Category, Code, Detail};
 use async_smtp::{self as smtp, EmailAddress, SmtpTransport};
-use tokio::io::BufStream;
 use tokio::task;
 
 use crate::chat::{add_info_msg_with_cmd, ChatId};
@@ -15,24 +13,18 @@ use crate::config::Config;
 use crate::contact::{Contact, ContactId};
 use crate::context::Context;
 use crate::events::EventType;
-use crate::login_param::{CertificateChecks, LoginParam, ServerLoginParam};
+use crate::login_param::{LoginParam, ServerLoginParam};
 use crate::message::Message;
 use crate::message::{self, MsgId};
 use crate::mimefactory::MimeFactory;
-use crate::net::connect_tcp;
 use crate::net::session::SessionBufStream;
-use crate::net::tls::wrap_tls;
 use crate::oauth2::get_oauth2_access_token;
-use crate::provider::Socket;
 use crate::scheduler::connectivity::ConnectivityStore;
 use crate::socks::Socks5Config;
 use crate::sql;
 use crate::stock_str::unencrypted_email;
 use crate::tools::{self, time_elapsed};
 
-/// SMTP connection, write and read timeout.
-const SMTP_TIMEOUT: Duration = Duration::from_secs(60);
-
 #[derive(Default)]
 pub(crate) struct Smtp {
     /// SMTP connection.
@@ -102,128 +94,11 @@ impl Smtp {
             &lp.smtp,
             &lp.socks5_config,
             &lp.addr,
-            lp.provider.map_or(lp.socks5_config.is_some(), |provider| {
-                provider.opt.strict_tls
-            }),
+            lp.strict_tls(),
         )
         .await
     }
 
-    async fn connect_secure_socks5(
-        &self,
-        context: &Context,
-        hostname: &str,
-        port: u16,
-        strict_tls: bool,
-        socks5_config: Socks5Config,
-    ) -> Result<SmtpTransport<Box<dyn SessionBufStream>>> {
-        let socks5_stream = socks5_config
-            .connect(context, hostname, port, SMTP_TIMEOUT, strict_tls)
-            .await?;
-        let tls_stream = wrap_tls(strict_tls, hostname, socks5_stream).await?;
-        let buffered_stream = BufStream::new(tls_stream);
-        let session_stream: Box<dyn SessionBufStream> = Box::new(buffered_stream);
-        let client = smtp::SmtpClient::new().smtp_utf8(true);
-        let transport = SmtpTransport::new(client, session_stream).await?;
-        Ok(transport)
-    }
-
-    async fn connect_starttls_socks5(
-        &self,
-        context: &Context,
-        hostname: &str,
-        port: u16,
-        strict_tls: bool,
-        socks5_config: Socks5Config,
-    ) -> Result<SmtpTransport<Box<dyn SessionBufStream>>> {
-        let socks5_stream = socks5_config
-            .connect(context, hostname, port, SMTP_TIMEOUT, strict_tls)
-            .await?;
-
-        // Run STARTTLS command and convert the client back into a stream.
-        let client = smtp::SmtpClient::new().smtp_utf8(true);
-        let transport = SmtpTransport::new(client, BufStream::new(socks5_stream)).await?;
-        let tcp_stream = transport.starttls().await?.into_inner();
-        let tls_stream = wrap_tls(strict_tls, hostname, tcp_stream)
-            .await
-            .context("STARTTLS upgrade failed")?;
-        let buffered_stream = BufStream::new(tls_stream);
-        let session_stream: Box<dyn SessionBufStream> = Box::new(buffered_stream);
-        let client = smtp::SmtpClient::new().smtp_utf8(true).without_greeting();
-        let transport = SmtpTransport::new(client, session_stream).await?;
-        Ok(transport)
-    }
-
-    async fn connect_insecure_socks5(
-        &self,
-        context: &Context,
-        hostname: &str,
-        port: u16,
-        socks5_config: Socks5Config,
-    ) -> Result<SmtpTransport<Box<dyn SessionBufStream>>> {
-        let socks5_stream = socks5_config
-            .connect(context, hostname, port, SMTP_TIMEOUT, false)
-            .await?;
-        let buffered_stream = BufStream::new(socks5_stream);
-        let session_stream: Box<dyn SessionBufStream> = Box::new(buffered_stream);
-        let client = smtp::SmtpClient::new().smtp_utf8(true);
-        let transport = SmtpTransport::new(client, session_stream).await?;
-        Ok(transport)
-    }
-
-    async fn connect_secure(
-        &self,
-        context: &Context,
-        hostname: &str,
-        port: u16,
-        strict_tls: bool,
-    ) -> Result<SmtpTransport<Box<dyn SessionBufStream>>> {
-        let tcp_stream = connect_tcp(context, hostname, port, SMTP_TIMEOUT, false).await?;
-        let tls_stream = wrap_tls(strict_tls, hostname, tcp_stream).await?;
-        let buffered_stream = BufStream::new(tls_stream);
-        let session_stream: Box<dyn SessionBufStream> = Box::new(buffered_stream);
-        let client = smtp::SmtpClient::new().smtp_utf8(true);
-        let transport = SmtpTransport::new(client, session_stream).await?;
-        Ok(transport)
-    }
-
-    async fn connect_starttls(
-        &self,
-        context: &Context,
-        hostname: &str,
-        port: u16,
-        strict_tls: bool,
-    ) -> Result<SmtpTransport<Box<dyn SessionBufStream>>> {
-        let tcp_stream = connect_tcp(context, hostname, port, SMTP_TIMEOUT, strict_tls).await?;
-
-        // Run STARTTLS command and convert the client back into a stream.
-        let client = smtp::SmtpClient::new().smtp_utf8(true);
-        let transport = SmtpTransport::new(client, BufStream::new(tcp_stream)).await?;
-        let tcp_stream = transport.starttls().await?.into_inner();
-        let tls_stream = wrap_tls(strict_tls, hostname, tcp_stream)
-            .await
-            .context("STARTTLS upgrade failed")?;
-        let buffered_stream = BufStream::new(tls_stream);
-        let session_stream: Box<dyn SessionBufStream> = Box::new(buffered_stream);
-        let client = smtp::SmtpClient::new().smtp_utf8(true).without_greeting();
-        let transport = SmtpTransport::new(client, session_stream).await?;
-        Ok(transport)
-    }
-
-    async fn connect_insecure(
-        &self,
-        context: &Context,
-        hostname: &str,
-        port: u16,
-    ) -> Result<SmtpTransport<Box<dyn SessionBufStream>>> {
-        let tcp_stream = connect_tcp(context, hostname, port, SMTP_TIMEOUT, false).await?;
-        let buffered_stream = BufStream::new(tcp_stream);
-        let session_stream: Box<dyn SessionBufStream> = Box::new(buffered_stream);
-        let client = smtp::SmtpClient::new().smtp_utf8(true);
-        let transport = SmtpTransport::new(client, session_stream).await?;
-        Ok(transport)
-    }
-
     /// Connect using the provided login params.
     pub async fn connect(
         &mut self,
@@ -231,7 +106,7 @@ impl Smtp {
         lp: &ServerLoginParam,
         socks5_config: &Option<Socks5Config>,
         addr: &str,
-        provider_strict_tls: bool,
+        strict_tls: bool,
     ) -> Result<()> {
         if self.is_connected() {
             warn!(context, "SMTP already connected.");
@@ -250,55 +125,17 @@ impl Smtp {
         let domain = &lp.server;
         let port = lp.port;
 
-        let strict_tls = match lp.certificate_checks {
-            CertificateChecks::Automatic => provider_strict_tls,
-            CertificateChecks::Strict => true,
-            CertificateChecks::AcceptInvalidCertificates
-            | CertificateChecks::AcceptInvalidCertificates2 => false,
-        };
-
-        let mut transport = if let Some(socks5_config) = socks5_config {
-            match lp.security {
-                Socket::Automatic => bail!("SMTP port security is not configured"),
-                Socket::Ssl => {
-                    self.connect_secure_socks5(
-                        context,
-                        domain,
-                        port,
-                        strict_tls,
-                        socks5_config.clone(),
-                    )
-                    .await?
-                }
-                Socket::Starttls => {
-                    self.connect_starttls_socks5(
-                        context,
-                        domain,
-                        port,
-                        strict_tls,
-                        socks5_config.clone(),
-                    )
-                    .await?
-                }
-                Socket::Plain => {
-                    self.connect_insecure_socks5(context, domain, port, socks5_config.clone())
-                        .await?
-                }
-            }
-        } else {
-            match lp.security {
-                Socket::Automatic => bail!("SMTP port security is not configured"),
-                Socket::Ssl => {
-                    self.connect_secure(context, domain, port, strict_tls)
-                        .await?
-                }
-                Socket::Starttls => {
-                    self.connect_starttls(context, domain, port, strict_tls)
-                        .await?
-                }
-                Socket::Plain => self.connect_insecure(context, domain, port).await?,
-            }
-        };
+        let session_stream = connect::connect_stream(
+            context,
+            domain,
+            port,
+            strict_tls,
+            socks5_config.clone(),
+            lp.security,
+        )
+        .await?;
+        let client = smtp::SmtpClient::new().smtp_utf8(true).without_greeting();
+        let mut transport = SmtpTransport::new(client, session_stream).await?;
 
         // Authenticate.
         {
@@ -794,9 +631,7 @@ async fn send_mdn_rfc724_mid(
 
 /// Tries to send a single MDN. Returns true if more MDNs should be sent.
 async fn send_mdn(context: &Context, smtp: &mut Smtp) -> Result<bool> {
-    let mdns_enabled = context.get_config_bool(Config::MdnsEnabled).await?;
-    if !mdns_enabled {
-        // User has disabled MDNs.
+    if !context.should_send_mdns().await? {
         context.sql.execute("DELETE FROM smtp_mdns", []).await?;
         return Ok(false);
     }

src/smtp/connect.rs

@@ -0,0 +1,226 @@
+//! SMTP connection establishment.
+
+use std::net::SocketAddr;
+
+use anyhow::{bail, format_err, Context as _, Result};
+use async_smtp::{SmtpClient, SmtpTransport};
+use tokio::io::BufStream;
+
+use crate::context::Context;
+use crate::net::dns::{lookup_host_with_cache, update_connect_timestamp};
+use crate::net::session::SessionBufStream;
+use crate::net::tls::wrap_tls;
+use crate::net::update_connection_history;
+use crate::net::{connect_tcp_inner, connect_tls_inner};
+use crate::provider::Socket;
+use crate::socks::Socks5Config;
+use crate::tools::time;
+
+/// Converts port number to ALPN list.
+fn alpn(port: u16) -> &'static [&'static str] {
+    if port == 465 {
+        // Do not request ALPN on standard port.
+        &[]
+    } else {
+        &["smtp"]
+    }
+}
+
+/// Returns TLS, STARTTLS or plaintext connection
+/// using SOCKS5 or direct connection depending on the given configuration.
+///
+/// Connection is returned after skipping the welcome message
+/// and is ready for sending commands. Because SMTP STARTTLS
+/// does not send welcome message over TLS connection
+/// after establishing it, welcome message is always ignored
+/// to unify the result regardless of whether TLS or STARTTLS is used.
+pub(crate) async fn connect_stream(
+    context: &Context,
+    host: &str,
+    port: u16,
+    strict_tls: bool,
+    socks5_config: Option<Socks5Config>,
+    security: Socket,
+) -> Result<Box<dyn SessionBufStream>> {
+    if let Some(socks5_config) = socks5_config {
+        let stream = match security {
+            Socket::Automatic => bail!("SMTP port security is not configured"),
+            Socket::Ssl => {
+                connect_secure_socks5(context, host, port, strict_tls, socks5_config.clone())
+                    .await?
+            }
+            Socket::Starttls => {
+                connect_starttls_socks5(context, host, port, strict_tls, socks5_config.clone())
+                    .await?
+            }
+            Socket::Plain => {
+                connect_insecure_socks5(context, host, port, socks5_config.clone()).await?
+            }
+        };
+        Ok(stream)
+    } else {
+        let mut first_error = None;
+        let load_cache = strict_tls && (security == Socket::Ssl || security == Socket::Starttls);
+
+        for resolved_addr in lookup_host_with_cache(context, host, port, "smtp", load_cache).await?
+        {
+            let res = match security {
+                Socket::Automatic => bail!("SMTP port security is not configured"),
+                Socket::Ssl => connect_secure(resolved_addr, host, strict_tls).await,
+                Socket::Starttls => connect_starttls(resolved_addr, host, strict_tls).await,
+                Socket::Plain => connect_insecure(resolved_addr).await,
+            };
+            match res {
+                Ok(stream) => {
+                    let ip_addr = resolved_addr.ip().to_string();
+                    if load_cache {
+                        update_connect_timestamp(context, host, &ip_addr).await?;
+                    }
+                    update_connection_history(context, "smtp", host, port, &ip_addr, time())
+                        .await?;
+                    return Ok(stream);
+                }
+                Err(err) => {
+                    warn!(context, "Failed to connect to {resolved_addr}: {err:#}.");
+                    first_error.get_or_insert(err);
+                }
+            }
+        }
+        Err(first_error.unwrap_or_else(|| format_err!("no DNS resolution results for {host}")))
+    }
+}
+
+/// Reads and ignores SMTP greeting.
+///
+/// This function is used to unify
+/// TLS, STARTTLS and plaintext connection setup
+/// by skipping the greeting in case of TLS
+/// and STARTTLS connection setup.
+async fn skip_smtp_greeting<R: tokio::io::AsyncBufReadExt + Unpin>(stream: &mut R) -> Result<()> {
+    let mut line = String::with_capacity(512);
+    loop {
+        line.clear();
+        let read = stream.read_line(&mut line).await?;
+        if read == 0 {
+            bail!("Unexpected EOF while reading SMTP greeting.");
+        }
+        if line.starts_with("220-") {
+            continue;
+        } else if line.starts_with("220 ") {
+            return Ok(());
+        } else {
+            bail!("Unexpected greeting: {line:?}.");
+        }
+    }
+}
+
+async fn connect_secure_socks5(
+    context: &Context,
+    hostname: &str,
+    port: u16,
+    strict_tls: bool,
+    socks5_config: Socks5Config,
+) -> Result<Box<dyn SessionBufStream>> {
+    let socks5_stream = socks5_config
+        .connect(context, hostname, port, strict_tls)
+        .await?;
+    let tls_stream = wrap_tls(strict_tls, hostname, alpn(port), socks5_stream).await?;
+    let mut buffered_stream = BufStream::new(tls_stream);
+    skip_smtp_greeting(&mut buffered_stream).await?;
+    let session_stream: Box<dyn SessionBufStream> = Box::new(buffered_stream);
+    Ok(session_stream)
+}
+
+async fn connect_starttls_socks5(
+    context: &Context,
+    hostname: &str,
+    port: u16,
+    strict_tls: bool,
+    socks5_config: Socks5Config,
+) -> Result<Box<dyn SessionBufStream>> {
+    let socks5_stream = socks5_config
+        .connect(context, hostname, port, strict_tls)
+        .await?;
+
+    // Run STARTTLS command and convert the client back into a stream.
+    let client = SmtpClient::new().smtp_utf8(true);
+    let transport = SmtpTransport::new(client, BufStream::new(socks5_stream)).await?;
+    let tcp_stream = transport.starttls().await?.into_inner();
+    let tls_stream = wrap_tls(strict_tls, hostname, &[], tcp_stream)
+        .await
+        .context("STARTTLS upgrade failed")?;
+    let buffered_stream = BufStream::new(tls_stream);
+    let session_stream: Box<dyn SessionBufStream> = Box::new(buffered_stream);
+    Ok(session_stream)
+}
+
+async fn connect_insecure_socks5(
+    context: &Context,
+    hostname: &str,
+    port: u16,
+    socks5_config: Socks5Config,
+) -> Result<Box<dyn SessionBufStream>> {
+    let socks5_stream = socks5_config
+        .connect(context, hostname, port, false)
+        .await?;
+    let mut buffered_stream = BufStream::new(socks5_stream);
+    skip_smtp_greeting(&mut buffered_stream).await?;
+    let session_stream: Box<dyn SessionBufStream> = Box::new(buffered_stream);
+    Ok(session_stream)
+}
+
+async fn connect_secure(
+    addr: SocketAddr,
+    hostname: &str,
+    strict_tls: bool,
+) -> Result<Box<dyn SessionBufStream>> {
+    let tls_stream = connect_tls_inner(addr, hostname, strict_tls, alpn(addr.port())).await?;
+    let mut buffered_stream = BufStream::new(tls_stream);
+    skip_smtp_greeting(&mut buffered_stream).await?;
+    let session_stream: Box<dyn SessionBufStream> = Box::new(buffered_stream);
+    Ok(session_stream)
+}
+
+async fn connect_starttls(
+    addr: SocketAddr,
+    host: &str,
+    strict_tls: bool,
+) -> Result<Box<dyn SessionBufStream>> {
+    let tcp_stream = connect_tcp_inner(addr).await?;
+
+    // Run STARTTLS command and convert the client back into a stream.
+    let client = async_smtp::SmtpClient::new().smtp_utf8(true);
+    let transport = async_smtp::SmtpTransport::new(client, BufStream::new(tcp_stream)).await?;
+    let tcp_stream = transport.starttls().await?.into_inner();
+    let tls_stream = wrap_tls(strict_tls, host, &[], tcp_stream)
+        .await
+        .context("STARTTLS upgrade failed")?;
+
+    let buffered_stream = BufStream::new(tls_stream);
+    let session_stream: Box<dyn SessionBufStream> = Box::new(buffered_stream);
+    Ok(session_stream)
+}
+
+async fn connect_insecure(addr: SocketAddr) -> Result<Box<dyn SessionBufStream>> {
+    let tcp_stream = connect_tcp_inner(addr).await?;
+    let mut buffered_stream = BufStream::new(tcp_stream);
+    skip_smtp_greeting(&mut buffered_stream).await?;
+    let session_stream: Box<dyn SessionBufStream> = Box::new(buffered_stream);
+    Ok(session_stream)
+}
+
+#[cfg(test)]
+mod tests {
+    use tokio::io::BufReader;
+
+    use super::*;
+
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_skip_smtp_greeting() -> Result<()> {
+        let greeting = b"220-server261.web-hosting.com ESMTP Exim 4.96.2 #2 Sat, 24 Aug 2024 12:25:53 -0400 \r\n\
+                         220-We do not authorize the use of this system to transport unsolicited,\r\n\
+                         220 and/or bulk e-mail.\r\n";
+        let mut buffered_stream = BufReader::new(&greeting[..]);
+        skip_smtp_greeting(&mut buffered_stream).await
+    }
+}

src/socks.rs

@@ -2,7 +2,6 @@
 
 use std::fmt;
 use std::pin::Pin;
-use std::time::Duration;
 
 use anyhow::Result;
 use fast_socks5::client::{Config, Socks5Stream};
@@ -76,11 +75,9 @@ impl Socks5Config {
         context: &Context,
         target_host: &str,
         target_port: u16,
-        timeout_val: Duration,
         load_dns_cache: bool,
     ) -> Result<Socks5Stream<Pin<Box<TimeoutStream<TcpStream>>>>> {
-        let tcp_stream =
-            connect_tcp(context, &self.host, self.port, timeout_val, load_dns_cache).await?;
+        let tcp_stream = connect_tcp(context, &self.host, self.port, load_dns_cache).await?;
 
         let authentication_method = if let Some((username, password)) = self.user_password.as_ref()
         {

src/sql.rs

@@ -18,6 +18,8 @@ use crate::imex::BLOBS_BACKUP_NAME;
 use crate::location::delete_orphaned_poi_locations;
 use crate::log::LogExt;
 use crate::message::{Message, MsgId, Viewtype};
+use crate::net::dns::prune_dns_cache;
+use crate::net::prune_connection_history;
 use crate::param::{Param, Params};
 use crate::peerstate::Peerstate;
 use crate::stock_str;
@@ -103,9 +105,11 @@ impl Sql {
 
         // Test that the key is correct using a single connection.
         let connection = Connection::open(&self.dbfile)?;
-        connection
-            .pragma_update(None, "key", &passphrase)
-            .context("failed to set PRAGMA key")?;
+        if !passphrase.is_empty() {
+            connection
+                .pragma_update(None, "key", &passphrase)
+                .context("Failed to set PRAGMA key")?;
+        }
         let key_is_correct = connection
             .query_row("SELECT count(*) FROM sqlite_master", [], |_row| Ok(()))
             .is_ok();
@@ -126,7 +130,7 @@ impl Sql {
     }
 
     /// Closes all underlying Sqlite connections.
-    async fn close(&self) {
+    pub(crate) async fn close(&self) {
         let _ = self.pool.write().await.take();
         // drop closes the connection
     }
@@ -137,46 +141,50 @@ impl Sql {
             .to_str()
             .with_context(|| format!("path {path:?} is not valid unicode"))?
             .to_string();
-        let res = self
-            .call_write(move |conn| {
-                // Check that backup passphrase is correct before resetting our database.
-                conn.execute("ATTACH DATABASE ? AS backup KEY ?", (path_str, passphrase))
-                    .context("failed to attach backup database")?;
-                if let Err(err) = conn
-                    .query_row("SELECT count(*) FROM sqlite_master", [], |_row| Ok(()))
-                    .context("backup passphrase is not correct")
-                {
-                    conn.execute("DETACH DATABASE backup", [])
-                        .context("failed to detach backup database")?;
-                    return Err(err);
-                }
 
-                // Reset the database without reopening it. We don't want to reopen the database because we
-                // don't have main database passphrase at this point.
-                // See <https://sqlite.org/c3ref/c_dbconfig_enable_fkey.html> for documentation.
-                // Without resetting import may fail due to existing tables.
+        // Keep `config_cache` locked all the time the db is imported so that nobody can use invalid
+        // values from there. And clear it immediately so as not to forget in case of errors.
+        let mut config_cache = self.config_cache.write().await;
+        config_cache.clear();
+
+        self.call_write(move |conn| {
+            // Check that backup passphrase is correct before resetting our database.
+            conn.execute("ATTACH DATABASE ? AS backup KEY ?", (path_str, passphrase))
+                .context("failed to attach backup database")?;
+            let res = conn
+                .query_row("SELECT count(*) FROM sqlite_master", [], |_row| Ok(()))
+                .context("backup passphrase is not correct");
+
+            // Reset the database without reopening it. We don't want to reopen the database because we
+            // don't have main database passphrase at this point.
+            // See <https://sqlite.org/c3ref/c_dbconfig_enable_fkey.html> for documentation.
+            // Without resetting import may fail due to existing tables.
+            let res = res.and_then(|_| {
                 conn.set_db_config(DbConfig::SQLITE_DBCONFIG_RESET_DATABASE, true)
-                    .context("failed to set SQLITE_DBCONFIG_RESET_DATABASE")?;
+                    .context("failed to set SQLITE_DBCONFIG_RESET_DATABASE")
+            });
+            let res = res.and_then(|_| {
                 conn.execute("VACUUM", [])
-                    .context("failed to vacuum the database")?;
+                    .context("failed to vacuum the database")
+            });
+            let res = res.and(
                 conn.set_db_config(DbConfig::SQLITE_DBCONFIG_RESET_DATABASE, false)
-                    .context("failed to unset SQLITE_DBCONFIG_RESET_DATABASE")?;
-                let res = conn
-                    .query_row("SELECT sqlcipher_export('main', 'backup')", [], |_row| {
-                        Ok(())
-                    })
-                    .context("failed to import from attached backup database");
+                    .context("failed to unset SQLITE_DBCONFIG_RESET_DATABASE"),
+            );
+            let res = res.and_then(|_| {
+                conn.query_row("SELECT sqlcipher_export('main', 'backup')", [], |_row| {
+                    Ok(())
+                })
+                .context("failed to import from attached backup database")
+            });
+            let res = res.and(
                 conn.execute("DETACH DATABASE backup", [])
-                    .context("failed to detach backup database")?;
-                res?;
-                Ok(())
-            })
-            .await;
-
-        // The config cache is wrong now that we have a different database
-        self.config_cache.write().await.clear();
-
-        res
+                    .context("failed to detach backup database"),
+            );
+            res?;
+            Ok(())
+        })
+        .await
     }
 
     /// Creates a new connection pool.
@@ -318,8 +326,10 @@ impl Sql {
 
         let pool = lock.take().context("SQL connection pool is not open")?;
         let conn = pool.get().await?;
-        conn.pragma_update(None, "rekey", passphrase.clone())
-            .context("failed to set PRAGMA rekey")?;
+        if !passphrase.is_empty() {
+            conn.pragma_update(None, "rekey", passphrase.clone())
+                .context("Failed to set PRAGMA rekey")?;
+        }
         drop(pool);
 
         *lock = Some(Self::new_pool(&self.dbfile, passphrase.to_string())?);
@@ -350,12 +360,12 @@ impl Sql {
     ///
     /// 1. As mentioned above, SQLite's locking mechanism is non-async and sleeps in a loop.
     /// 2. If there are other write transactions, we block the db connection until
-    ///   upgraded. If some reader comes then, it has to get the next, less used connection with a
-    ///   worse per-connection page cache (SQLite allows one write and any number of reads in parallel).
+    ///    upgraded. If some reader comes then, it has to get the next, less used connection with a
+    ///    worse per-connection page cache (SQLite allows one write and any number of reads in parallel).
     /// 3. If a transaction is blocked for more than `busy_timeout`, it fails with SQLITE_BUSY.
     /// 4. If upon a successful upgrade to a write transaction the db has been modified,
-    ///   the transaction has to be rolled back and retried, which means extra work in terms of
-    ///   CPU/battery.
+    ///    the transaction has to be rolled back and retried, which means extra work in terms of
+    ///    CPU/battery.
     ///
     /// The only pro of making write transactions DEFERRED w/o the external locking would be some
     /// parallelism between them.
@@ -691,7 +701,9 @@ fn new_connection(path: &Path, passphrase: &str) -> Result<Connection> {
         conn.pragma_update(None, "temp_store", "memory")?;
     }
 
-    conn.pragma_update(None, "key", passphrase)?;
+    if !passphrase.is_empty() {
+        conn.pragma_update(None, "key", passphrase)?;
+    }
     // Try to enable auto_vacuum. This will only be
     // applied if the database is new or after successful
     // VACUUM, which usually happens before backup export.
@@ -783,6 +795,17 @@ pub async fn housekeeping(context: &Context) -> Result<()> {
         .log_err(context)
         .ok();
 
+    prune_connection_history(context)
+        .await
+        .context("Failed to prune connection history")
+        .log_err(context)
+        .ok();
+    prune_dns_cache(context)
+        .await
+        .context("Failed to prune DNS cache")
+        .log_err(context)
+        .ok();
+
     // Delete POI locations
     // which don't have corresponding message.
     delete_orphaned_poi_locations(context)

src/sql/migrations.rs

@@ -11,6 +11,7 @@ use crate::imap;
 use crate::message::MsgId;
 use crate::provider::get_provider_by_domain;
 use crate::sql::Sql;
+use crate::tools::inc_and_check;
 
 const DBVERSION: i32 = 68;
 const VERSION_CFG: &str = "dbversion";
@@ -941,10 +942,9 @@ CREATE INDEX msgs_status_updates_index2 ON msgs_status_updates (uid);
         sql.execute_migration("ALTER TABLE msgs ADD COLUMN txt_normalized TEXT", 115)
             .await?;
     }
-    let migration_version: i32 = 115;
+    let mut migration_version: i32 = 115;
 
-    let migration_version: i32 = migration_version + 1;
-    ensure!(migration_version == 116, "Fix the number here");
+    inc_and_check(&mut migration_version, 116)?;
     if dbversion < migration_version {
         // Whether the message part doesn't need to be stored on the server. If all parts are marked
         // deleted, a server-side deletion is issued.
@@ -955,6 +955,22 @@ CREATE INDEX msgs_status_updates_index2 ON msgs_status_updates (uid);
         .await?;
     }
 
+    inc_and_check(&mut migration_version, 117)?;
+    if dbversion < migration_version {
+        sql.execute_migration(
+            "CREATE TABLE connection_history (
+                host TEXT NOT NULL, -- server hostname
+                port INTEGER NOT NULL, -- server port
+                alpn TEXT NOT NULL, -- ALPN such as smtp or imap
+                addr TEXT NOT NULL, -- IP address
+                timestamp INTEGER NOT NULL, -- timestamp of the most recent successful connection
+                UNIQUE (host, port, alpn, addr)
+            ) STRICT",
+            migration_version,
+        )
+        .await?;
+    }
+
     let new_version = sql
         .get_raw_config_int(VERSION_CFG)
         .await?

src/stock_str.rs

@@ -80,9 +80,6 @@ pub enum StockMessage {
     #[strum(props(fallback = "Fingerprints"))]
     FingerPrints = 30,
 
-    #[strum(props(fallback = "Return receipt"))]
-    ReadRcpt = 31,
-
     #[strum(props(fallback = "End-to-end encryption preferred"))]
     E2ePreferred = 34,
 
@@ -440,9 +437,6 @@ pub enum StockMessage {
         fallback = "Could not yet establish guaranteed end-to-end encryption, but you may already send a message."
     ))]
     SecurejoinWaitTimeout = 191,
-
-    #[strum(props(fallback = "This message is a receipt notification."))]
-    ReadRcptMailBody = 192,
 }
 
 impl StockMessage {
@@ -795,16 +789,6 @@ pub(crate) async fn finger_prints(context: &Context) -> String {
     translated(context, StockMessage::FingerPrints).await
 }
 
-/// Stock string: `Return receipt`.
-pub(crate) async fn read_rcpt(context: &Context) -> String {
-    translated(context, StockMessage::ReadRcpt).await
-}
-
-/// Stock string: `This message is a receipt notification.`.
-pub(crate) async fn read_rcpt_mail_body(context: &Context) -> String {
-    translated(context, StockMessage::ReadRcptMailBody).await
-}
-
 /// Stock string: `Group image deleted.`.
 pub(crate) async fn msg_grp_img_deleted(context: &Context, by_contact: ContactId) -> String {
     if by_contact == ContactId::SELF {
@@ -859,10 +843,10 @@ pub(crate) async fn setup_contact_qr_description(
     display_name: &str,
     addr: &str,
 ) -> String {
-    let name = if display_name == addr {
+    let name = if display_name.is_empty() {
         addr.to_owned()
     } else {
-        format!("{display_name} ({addr})")
+        display_name.to_owned()
     };
     translated(context, StockMessage::SetupContactQRDescription)
         .await

src/summary.rs

@@ -129,6 +129,8 @@ impl Summary {
         {
             msg.get_file(context)
                 .and_then(|path| path.to_str().map(|p| p.to_owned()))
+        } else if msg.viewtype == Viewtype::Webxdc {
+            Some("webxdc-icon://last-msg-id".to_string())
         } else {
             None
         };
@@ -356,6 +358,18 @@ mod tests {
         msg.set_file("foo.mp3", None);
         assert_summary_texts(&msg, ctx, "🎵 foo.mp3 \u{2013} bla bla").await; // file name and text added for audio
 
+        let mut msg = Message::new(Viewtype::File);
+        let bytes = include_bytes!("../test-data/webxdc/with-minimal-manifest.xdc");
+        msg.set_file_from_bytes(ctx, "foo.xdc", bytes, None)
+            .await
+            .unwrap();
+        chat_id.set_draft(ctx, Some(&mut msg)).await.unwrap();
+        assert_eq!(msg.viewtype, Viewtype::Webxdc);
+        assert_summary_texts(&msg, ctx, "nice app!").await;
+        msg.set_text(some_text.clone());
+        chat_id.set_draft(ctx, Some(&mut msg)).await.unwrap();
+        assert_summary_texts(&msg, ctx, "nice app! \u{2013} bla bla").await;
+
         let mut msg = Message::new(Viewtype::File);
         msg.set_file("foo.bar", None);
         assert_summary_texts(&msg, ctx, "📎 foo.bar").await; // file name is added for files

src/sync.rs

@@ -120,6 +120,7 @@ impl Context {
     /// Adds most recent qr-code tokens for a given chat to the list of items to be synced.
     /// If device synchronization is disabled,
     /// no tokens exist or the chat is unpromoted, the function does nothing.
+    /// The caller should perform `SchedulerState::interrupt_smtp()` on its own to trigger sending.
     pub(crate) async fn sync_qr_code_tokens(&self, chat_id: Option<ChatId>) -> Result<()> {
         if !self.should_send_sync_msgs().await? {
             return Ok(());
@@ -154,6 +155,7 @@ impl Context {
 
     /// Adds deleted qr-code token to the list of items to be synced
     /// so that the token also gets deleted on the other devices.
+    /// This interrupts SMTP on its own.
     pub(crate) async fn sync_qr_code_token_deletion(
         &self,
         invitenumber: String,
@@ -164,10 +166,16 @@ impl Context {
             auth,
             grpid: None,
         }))
-        .await
+        .await?;
+        self.scheduler.interrupt_smtp().await;
+        Ok(())
     }
 
     /// Sends out a self-sent message with items to be synchronized, if any.
+    ///
+    /// Mustn't be called from multiple tasks in parallel to avoid sending the same sync items twice
+    /// because sync items are removed from the db only after successful sending. We guarantee this
+    /// by calling `send_sync_msg()` only from the SMTP loop.
     pub async fn send_sync_msg(&self) -> Result<Option<MsgId>> {
         if let Some((json, ids)) = self.build_sync_json().await? {
             let chat_id =
@@ -608,7 +616,8 @@ mod tests {
         alice
             .set_config(Config::Displayname, Some("Alice Human"))
             .await?;
-        alice.pop_sent_msg().await; // Sync message
+        alice.send_sync_msg().await?;
+        alice.pop_sent_msg().await;
         let msg = bob.recv_msg(&alice.pop_sent_msg().await).await;
         assert_eq!(msg.text, "hi");
 

src/test_utils.rs

@@ -2,7 +2,7 @@
 //!
 //! This private module is only compiled for test runs.
 #![allow(clippy::indexing_slicing)]
-use std::collections::BTreeMap;
+use std::collections::{BTreeMap, HashSet};
 use std::fmt::Write;
 use std::ops::{Deref, DerefMut};
 use std::panic;
@@ -175,7 +175,12 @@ impl TestContextManager {
         ));
 
         let qr = get_securejoin_qr(&scanned.ctx, None).await.unwrap();
-        join_securejoin(&scanner.ctx, &qr).await.unwrap();
+        self.exec_securejoin_qr(scanner, scanned, &qr).await;
+    }
+
+    /// Executes SecureJoin initiated by `scanner` scanning `qr` generated by `scanned`.
+    pub async fn exec_securejoin_qr(&self, scanner: &TestContext, scanned: &TestContext, qr: &str) {
+        join_securejoin(&scanner.ctx, qr).await.unwrap();
 
         loop {
             if let Some(sent) = scanner.pop_sent_msg_opt(Duration::ZERO).await {
@@ -472,6 +477,36 @@ impl TestContext {
         update_msg_state(&self.ctx, msg_id, MessageState::OutDelivered)
             .await
             .expect("failed to update message state");
+
+        let payload_headers = payload.split("\r\n\r\n").next().unwrap().lines();
+        let payload_header_names: Vec<_> = payload_headers
+            .map(|h| h.split(':').next().unwrap())
+            .collect();
+
+        // Check that we are sending exactly one From, Subject, Date, To, Message-ID, and MIME-Version header:
+        for header in &[
+            "From",
+            "Subject",
+            "Date",
+            "To",
+            "Message-ID",
+            "MIME-Version",
+        ] {
+            assert_eq!(
+                payload_header_names.iter().filter(|h| *h == header).count(),
+                1,
+                "This sent email should contain the header {header} exactly 1 time:\n{payload}"
+            );
+        }
+        // Check that we aren't sending any header twice:
+        let mut hash_set = HashSet::new();
+        for header_name in payload_header_names {
+            assert!(
+                hash_set.insert(header_name),
+                "This sent email shouldn't contain the header {header_name} multiple times:\n{payload}"
+            );
+        }
+
         Some(SentMessage {
             payload,
             sender_msg_id: msg_id,
@@ -1104,6 +1139,7 @@ pub(crate) async fn mark_as_verified(this: &TestContext, other: &TestContext) {
 /// Pops a sync message from alice0 and receives it on alice1. Should be used after an action on
 /// alice0's side that implies sending a sync message.
 pub(crate) async fn sync(alice0: &TestContext, alice1: &TestContext) {
+    alice0.send_sync_msg().await.unwrap();
     let sync_msg = alice0.pop_sent_msg().await;
     let no_msg = alice1.recv_msg_opt(&sync_msg).await;
     assert!(no_msg.is_none());

src/tests/verified_chats.rs

@@ -881,7 +881,7 @@ async fn test_verified_member_added_reordering() -> Result<()> {
 }
 
 #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
-async fn test_no_unencrypted_name_if_verified() -> Result<()> {
+async fn test_no_unencrypted_name_if_encrypted() -> Result<()> {
     let mut tcm = TestContextManager::new();
     for verified in [false, true] {
         let alice = tcm.alice().await;
@@ -898,7 +898,7 @@ async fn test_no_unencrypted_name_if_verified() -> Result<()> {
         let chat_id = bob.create_chat(&alice).await.id;
         let msg = &bob.send_text(chat_id, "hi").await;
 
-        assert_eq!(msg.payload.contains("Bob Smith"), !verified);
+        assert_eq!(msg.payload.contains("Bob Smith"), false);
         assert!(msg.payload.contains("BEGIN PGP MESSAGE"));
 
         let msg = alice.recv_msg(msg).await;

src/tools.rs

@@ -6,6 +6,7 @@
 use std::borrow::Cow;
 use std::io::{Cursor, Write};
 use std::mem;
+use std::ops::{AddAssign, Deref};
 use std::path::{Path, PathBuf};
 use std::str::from_utf8;
 // If a time value doesn't need to be sent to another host, saved to the db or otherwise used across
@@ -19,7 +20,7 @@ pub use std::time::SystemTime as Time;
 #[cfg(not(test))]
 pub use std::time::SystemTime;
 
-use anyhow::{bail, Context as _, Result};
+use anyhow::{bail, ensure, Context as _, Result};
 use base64::Engine as _;
 use chrono::{Local, NaiveDateTime, NaiveTime, TimeZone};
 use deltachat_contact_tools::EmailAddress;
@@ -29,6 +30,7 @@ use futures::{StreamExt, TryStreamExt};
 use mailparse::dateparse;
 use mailparse::headers::Headers;
 use mailparse::MailHeaderMap;
+use num_traits::PrimInt;
 use rand::{thread_rng, Rng};
 use tokio::{fs, io};
 use url::Url;
@@ -256,6 +258,7 @@ async fn maybe_warn_on_outdated(context: &Context, now: i64, approx_compile_time
 /// Generate an ID. The generated ID should be as short and as unique as possible:
 /// - short, because it may also used as part of Message-ID headers or in QR codes
 /// - unique as two IDs generated on two devices should not be the same. However, collisions are not world-wide but only by the few contacts.
+///
 /// IDs generated by this function are 66 bit wide and are returned as 11 base64 characters.
 ///
 /// Additional information when used as a message-id or group-id:
@@ -303,7 +306,7 @@ pub fn get_filesuffix_lc(path_filename: &str) -> Option<String> {
 
 /// Returns the `(width, height)` of the given image buffer.
 pub fn get_filemeta(buf: &[u8]) -> Result<(u32, u32)> {
-    let image = image::io::Reader::new(Cursor::new(buf)).with_guessed_format()?;
+    let image = image::ImageReader::new(Cursor::new(buf)).with_guessed_format()?;
     let dimensions = image.into_dimensions()?;
     Ok(dimensions)
 }
@@ -361,6 +364,41 @@ pub async fn delete_files_in_dir(context: &Context, path: impl AsRef<Path>) -> R
     Ok(())
 }
 
+/// A guard which will remove the path when dropped.
+///
+/// It implements [`Deref`] so it can be used as a `&Path`.
+#[derive(Debug)]
+pub(crate) struct TempPathGuard {
+    path: PathBuf,
+}
+
+impl TempPathGuard {
+    pub(crate) fn new(path: PathBuf) -> Self {
+        Self { path }
+    }
+}
+
+impl Drop for TempPathGuard {
+    fn drop(&mut self) {
+        let path = self.path.clone();
+        std::fs::remove_file(path).ok();
+    }
+}
+
+impl Deref for TempPathGuard {
+    type Target = Path;
+
+    fn deref(&self) -> &Self::Target {
+        &self.path
+    }
+}
+
+impl AsRef<Path> for TempPathGuard {
+    fn as_ref(&self) -> &Path {
+        self
+    }
+}
+
 pub(crate) async fn create_folder(
     context: &Context,
     path: impl AsRef<Path>,
@@ -647,6 +685,16 @@ pub(crate) fn buf_decompress(buf: &[u8]) -> Result<Vec<u8>> {
     Ok(mem::take(decompressor.get_mut()))
 }
 
+/// Increments `*t` and checks that it equals to `expected` after that.
+pub(crate) fn inc_and_check<T: PrimInt + AddAssign + std::fmt::Debug>(
+    t: &mut T,
+    expected: T,
+) -> Result<()> {
+    *t += T::one();
+    ensure!(*t == expected, "Incremented value != {expected:?}");
+    Ok(())
+}
+
 #[cfg(test)]
 mod tests {
     #![allow(clippy::indexing_slicing)]

src/webxdc.rs

@@ -18,6 +18,7 @@
 mod integration;
 mod maps_integration;
 
+use std::cmp::max;
 use std::path::Path;
 
 use anyhow::{anyhow, bail, ensure, format_err, Context as _, Result};
@@ -122,6 +123,11 @@ impl StatusUpdateSerial {
         StatusUpdateSerial(id)
     }
 
+    /// Minimum value.
+    pub const MIN: Self = Self(1);
+    /// Maximum value.
+    pub const MAX: Self = Self(u32::MAX - 1);
+
     /// Gets StatusUpdateSerial as untyped integer.
     /// Avoid using this outside ffi.
     pub fn to_u32(self) -> u32 {
@@ -196,6 +202,9 @@ fn find_zip_entry<'a>(
     None
 }
 
+/// Status update JSON size soft limit.
+const STATUS_UPDATE_SIZE_MAX: usize = 100 << 10;
+
 impl Context {
     /// check if a file is an acceptable webxdc for sending or receiving.
     pub(crate) async fn is_webxdc_file(&self, filename: &str, file: &[u8]) -> Result<bool> {
@@ -505,22 +514,19 @@ impl Context {
         Ok(())
     }
 
-    /// Pops one record of queued webxdc status updates.
-    /// This function exists to make the sqlite statement testable.
-    async fn pop_smtp_status_update(
+    /// Returns one record of the queued webxdc status updates.
+    async fn smtp_status_update_get(
         &self,
-    ) -> Result<Option<(MsgId, StatusUpdateSerial, StatusUpdateSerial, String)>> {
-        let _lock = self.sql.write_lock().await;
+    ) -> Result<Option<(MsgId, i64, StatusUpdateSerial, String)>> {
         let res = self
             .sql
             .query_row_optional(
-                "DELETE FROM smtp_status_updates
-                     WHERE msg_id IN (SELECT msg_id FROM smtp_status_updates LIMIT 1)
-                     RETURNING msg_id, first_serial, last_serial, descr",
+                "SELECT msg_id, first_serial, last_serial, descr \
+                 FROM smtp_status_updates LIMIT 1",
                 (),
                 |row| {
                     let instance_id: MsgId = row.get(0)?;
-                    let first_serial: StatusUpdateSerial = row.get(1)?;
+                    let first_serial: i64 = row.get(1)?;
                     let last_serial: StatusUpdateSerial = row.get(2)?;
                     let descr: String = row.get(3)?;
                     Ok((instance_id, first_serial, last_serial, descr))
@@ -530,19 +536,50 @@ impl Context {
         Ok(res)
     }
 
+    async fn smtp_status_update_pop_serials(
+        &self,
+        msg_id: MsgId,
+        first: i64,
+        first_new: StatusUpdateSerial,
+    ) -> Result<()> {
+        if self
+            .sql
+            .execute(
+                "DELETE FROM smtp_status_updates \
+                 WHERE msg_id=? AND first_serial=? AND last_serial<?",
+                (msg_id, first, first_new),
+            )
+            .await?
+            > 0
+        {
+            return Ok(());
+        }
+        self.sql
+            .execute(
+                "UPDATE smtp_status_updates SET first_serial=? \
+                 WHERE msg_id=? AND first_serial=?",
+                (first_new, msg_id, first),
+            )
+            .await?;
+        Ok(())
+    }
+
     /// Attempts to send queued webxdc status updates.
     pub(crate) async fn flush_status_updates(&self) -> Result<()> {
         loop {
-            let (instance_id, first_serial, last_serial, descr) =
-                match self.pop_smtp_status_update().await? {
-                    Some(res) => res,
-                    None => return Ok(()),
-                };
-
-            if let Some(json) = self
-                .render_webxdc_status_update_object(instance_id, Some((first_serial, last_serial)))
-                .await?
-            {
+            let (instance_id, first, last, descr) = match self.smtp_status_update_get().await? {
+                Some(res) => res,
+                None => return Ok(()),
+            };
+            let (json, first_new) = self
+                .render_webxdc_status_update_object(
+                    instance_id,
+                    StatusUpdateSerial(max(first, 1).try_into()?),
+                    last,
+                    Some(STATUS_UPDATE_SIZE_MAX),
+                )
+                .await?;
+            if let Some(json) = json {
                 let instance = Message::load_from_db(self, instance_id).await?;
                 let mut status_update = Message {
                     chat_id: instance.chat_id,
@@ -559,6 +596,8 @@ impl Context {
                 status_update.param.remove(Param::GuaranteeE2ee); // may be set by set_quote(), if #2985 is done, this line can be removed
                 chat::send_msg(self, instance.chat_id, &mut status_update).await?;
             }
+            self.smtp_status_update_pop_serials(instance_id, first, first_new)
+                .await?;
         }
     }
 
@@ -690,45 +729,59 @@ impl Context {
 
     /// Renders JSON-object for status updates as used on the wire.
     ///
-    /// Example: `{"updates": [{"payload":"any update data"},
-    ///                        {"payload":"another update data"}]}`
+    /// Returns optional JSON and the first serial of updates not included due to a JSON size
+    /// limit. If all requested updates are included, returns the first not requested serial.
     ///
-    /// `range` is an optional range of status update serials to send.
-    /// If it is `None`, all updates are sent.
-    /// This is used when a message is resent using [`crate::chat::resend_msgs`].
+    /// Example JSON: `{"updates": [{"payload":"any update data"},
+    ///                             {"payload":"another update data"}]}`
+    ///
+    /// * `(first, last)`: range of status update serials to send.
     pub(crate) async fn render_webxdc_status_update_object(
         &self,
         instance_msg_id: MsgId,
-        range: Option<(StatusUpdateSerial, StatusUpdateSerial)>,
-    ) -> Result<Option<String>> {
-        let json = self
+        first: StatusUpdateSerial,
+        last: StatusUpdateSerial,
+        size_max: Option<usize>,
+    ) -> Result<(Option<String>, StatusUpdateSerial)> {
+        let (json, first_new) = self
             .sql
             .query_map(
-                "SELECT update_item FROM msgs_status_updates WHERE msg_id=? AND id>=? AND id<=? ORDER BY id",
-                (
-                    instance_msg_id,
-                    range.map(|r|r.0).unwrap_or(StatusUpdateSerial(0)),
-                    range.map(|r|r.1).unwrap_or(StatusUpdateSerial(u32::MAX)),
-                ),
-                |row| row.get::<_, String>(0),
+                "SELECT id, update_item FROM msgs_status_updates \
+                 WHERE msg_id=? AND id>=? AND id<=? ORDER BY id",
+                (instance_msg_id, first, last),
+                |row| {
+                    let id: StatusUpdateSerial = row.get(0)?;
+                    let update_item: String = row.get(1)?;
+                    Ok((id, update_item))
+                },
                 |rows| {
                     let mut json = String::default();
                     for row in rows {
-                        let update_item = row?;
+                        let (id, update_item) = row?;
+                        if !json.is_empty()
+                            && json.len() + update_item.len() >= size_max.unwrap_or(usize::MAX)
+                        {
+                            return Ok((json, id));
+                        }
                         if !json.is_empty() {
                             json.push_str(",\n");
                         }
                         json.push_str(&update_item);
                     }
-                    Ok(json)
+                    Ok((
+                        json,
+                        // Too late to fail here if an overflow happens. It's still better to send
+                        // the updates.
+                        StatusUpdateSerial::new(last.to_u32().saturating_add(1)),
+                    ))
                 },
             )
             .await?;
-        if json.is_empty() {
-            Ok(None)
-        } else {
-            Ok(Some(format!(r#"{{"updates":[{json}]}}"#)))
-        }
+        let json = match json.is_empty() {
+            true => None,
+            false => Some(format!(r#"{{"updates":[{json}]}}"#)),
+        };
+        Ok((json, first_new))
     }
 }
 
@@ -1089,10 +1142,13 @@ mod tests {
         assert_eq!(alice_grp.get_msg_cnt(&alice).await?, 3);
         resend_msgs(&alice, &[alice_instance.id]).await?;
         let sent1 = alice.pop_sent_msg().await;
+        alice.flush_status_updates().await?;
+        let sent2 = alice.pop_sent_msg().await;
 
-        // Bob received webxdc, legacy info-messages updates are received but not added to the chat
+        // Bob receives webxdc, legacy info-messages updates are received and added to the chat.
         let bob = tcm.bob().await;
         let bob_instance = bob.recv_msg(&sent1).await;
+        bob.recv_msg_trash(&sent2).await;
         assert_eq!(bob_instance.viewtype, Viewtype::Webxdc);
         assert!(!bob_instance.is_info());
         assert_eq!(
@@ -1684,6 +1740,79 @@ mod tests {
         Ok(())
     }
 
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_send_big_webxdc_status_update() -> Result<()> {
+        let alice = TestContext::new_alice().await;
+        alice.set_config_bool(Config::BccSelf, true).await?;
+        let bob = TestContext::new_bob().await;
+
+        let alice_chat = alice.create_chat(&bob).await;
+        let alice_instance = send_webxdc_instance(&alice, alice_chat.id).await?;
+        let sent1 = &alice.pop_sent_msg().await;
+        assert_eq!(alice_instance.viewtype, Viewtype::Webxdc);
+        assert!(!sent1.payload().contains("report-type=status-update"));
+
+        let update1_str = r#"{"payload":{"foo":""#.to_string()
+            + &String::from_utf8(vec![b'a'; STATUS_UPDATE_SIZE_MAX])?
+            + r#""}"#;
+        alice
+            .send_webxdc_status_update(alice_instance.id, &(update1_str.clone() + "}"), "descr1")
+            .await?;
+        alice
+            .send_webxdc_status_update(
+                alice_instance.id,
+                r#"{"payload" : {"foo":"bar2"}}"#,
+                "descr2",
+            )
+            .await?;
+        alice
+            .send_webxdc_status_update(
+                alice_instance.id,
+                r#"{"payload" : {"foo":"bar3"}}"#,
+                "descr3",
+            )
+            .await?;
+        alice.flush_status_updates().await?;
+
+        // There's the message stack, so we pop messages in the reverse order.
+        let sent3 = &alice.pop_sent_msg().await;
+        let alice_update = sent3.load_from_db().await;
+        assert_eq!(alice_update.text, "descr3".to_string());
+        let sent2 = &alice.pop_sent_msg().await;
+        let alice_update = sent2.load_from_db().await;
+        assert_eq!(alice_update.text, "descr3".to_string());
+        assert_eq!(alice_chat.id.get_msg_cnt(&alice).await?, 1);
+
+        // Bob receives the instance.
+        let bob_instance = bob.recv_msg(sent1).await;
+        let bob_chat_id = bob_instance.chat_id;
+        assert_eq!(bob_instance.rfc724_mid, alice_instance.rfc724_mid);
+        assert_eq!(bob_instance.viewtype, Viewtype::Webxdc);
+        assert_eq!(bob_chat_id.get_msg_cnt(&bob).await?, 1);
+
+        // Bob receives the status updates.
+        bob.recv_msg_trash(sent2).await;
+        expect_status_update_event(&bob, bob_instance.id).await?;
+        assert_eq!(
+            bob.get_webxdc_status_updates(bob_instance.id, StatusUpdateSerial(0))
+                .await?,
+            "[".to_string() + &update1_str + r#","serial":1,"max_serial":1}]"#
+        );
+        bob.recv_msg_trash(sent3).await;
+        for _ in 0..2 {
+            expect_status_update_event(&bob, bob_instance.id).await?;
+        }
+        assert_eq!(
+            bob.get_webxdc_status_updates(bob_instance.id, StatusUpdateSerial(1))
+                .await?,
+            r#"[{"payload":{"foo":"bar2"},"serial":2,"max_serial":3},
+{"payload":{"foo":"bar3"},"serial":3,"max_serial":3}]"#
+        );
+        assert_eq!(bob_chat_id.get_msg_cnt(&bob).await?, 1);
+
+        Ok(())
+    }
+
     #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
     async fn test_render_webxdc_status_update_object() -> Result<()> {
         let t = TestContext::new_alice().await;
@@ -1695,17 +1824,20 @@ mod tests {
         )
         .await?;
         chat_id.set_draft(&t, Some(&mut instance)).await?;
-        assert!(t
-            .render_webxdc_status_update_object(instance.id, None)
-            .await?
-            .is_none());
+        let (first, last) = (StatusUpdateSerial(1), StatusUpdateSerial::MAX);
+        assert_eq!(
+            t.render_webxdc_status_update_object(instance.id, first, last, None)
+                .await?,
+            (None, StatusUpdateSerial(u32::MAX))
+        );
 
         t.send_webxdc_status_update(instance.id, r#"{"payload": 1}"#, "bla")
             .await?;
-        assert!(t
-            .render_webxdc_status_update_object(instance.id, None)
-            .await?
-            .is_some());
+        let (object, first_new) = t
+            .render_webxdc_status_update_object(instance.id, first, last, None)
+            .await?;
+        assert!(object.is_some());
+        assert_eq!(first_new, StatusUpdateSerial(u32::MAX));
 
         Ok(())
     }
@@ -1723,13 +1855,16 @@ mod tests {
             .await?;
         t.send_webxdc_status_update(instance.id, r#"{"payload": 4}"#, "d")
             .await?;
-        let json = t
+        let (json, first_new) = t
             .render_webxdc_status_update_object(
                 instance.id,
-                Some((StatusUpdateSerial(2), StatusUpdateSerial(3))),
+                StatusUpdateSerial(2),
+                StatusUpdateSerial(3),
+                None,
             )
-            .await?
-            .unwrap();
+            .await?;
+        let json = json.unwrap();
+        assert_eq!(first_new, StatusUpdateSerial(4));
         let json = Regex::new(r#""uid":"[^"]*""#)
             .unwrap()
             .replace_all(&json, "XXX");
@@ -1761,7 +1896,7 @@ mod tests {
         let instance1 = send_webxdc_instance(&t, chat_id).await?;
         let instance2 = send_webxdc_instance(&t, chat_id).await?;
         let instance3 = send_webxdc_instance(&t, chat_id).await?;
-        assert!(t.pop_smtp_status_update().await?.is_none());
+        assert!(t.smtp_status_update_get().await?.is_none());
 
         t.send_webxdc_status_update(instance1.id, r#"{"payload": "1a"}"#, "descr1a")
             .await?;
@@ -1782,20 +1917,27 @@ mod tests {
             3
         );
 
-        // order of pop_status_update() is not defined, therefore the more complicated test
+        // order of smtp_status_update_get() is not defined, therefore the more complicated test
         let mut instances_checked = 0;
         for i in 0..3 {
-            let (instance, min_ser, max_ser, descr) = t.pop_smtp_status_update().await?.unwrap();
+            let (instance, min_ser, max_ser, descr) = t.smtp_status_update_get().await?.unwrap();
+            t.smtp_status_update_pop_serials(
+                instance,
+                min_ser,
+                StatusUpdateSerial::new(max_ser.to_u32().checked_add(1).unwrap()),
+            )
+            .await?;
+            let min_ser: u32 = min_ser.try_into()?;
             if instance == instance1.id {
-                assert_eq!(min_ser, max_ser);
+                assert_eq!(min_ser, max_ser.to_u32());
                 assert_eq!(descr, "descr1a");
                 instances_checked += 1;
             } else if instance == instance2.id {
-                assert_eq!(min_ser.to_u32(), max_ser.to_u32() - 1);
+                assert_eq!(min_ser, max_ser.to_u32() - 1);
                 assert_eq!(descr, "descr2b");
                 instances_checked += 1;
             } else if instance == instance3.id {
-                assert_eq!(min_ser.to_u32(), max_ser.to_u32() - 2);
+                assert_eq!(min_ser, max_ser.to_u32() - 2);
                 assert_eq!(descr, "descr3c");
                 instances_checked += 1;
             } else {
@@ -1809,7 +1951,7 @@ mod tests {
             );
         }
         assert_eq!(instances_checked, 3);
-        assert!(t.pop_smtp_status_update().await?.is_none());
+        assert!(t.smtp_status_update_get().await?.is_none());
 
         Ok(())
     }
@@ -1836,12 +1978,11 @@ mod tests {
         alice
             .send_webxdc_status_update(alice_instance.id, r#"{"payload": {"foo":"bar"}}"#, "descr")
             .await?;
-        alice.flush_status_updates().await?;
         expect_status_update_event(&alice, alice_instance.id).await?;
         alice
             .send_webxdc_status_update(alice_instance.id, r#"{"payload":42, "info":"i"}"#, "descr")
             .await?;
-        alice.flush_status_updates().await?;
+        expect_status_update_event(&alice, alice_instance.id).await?;
         assert_eq!(
             alice
                 .sql
@@ -2509,6 +2650,7 @@ sth_for_the = "future""#
         assert_eq!(chatlist.len(), 1);
         let summary = chatlist.get_summary(&t, 0, None).await?;
         assert_eq!(summary.text, "nice app!".to_string());
+        assert_eq!(summary.thumbnail_path.unwrap(), "webxdc-icon://last-msg-id");
 
         Ok(())
     }

standards.md

@@ -19,7 +19,7 @@ Authorization                    | OAuth2 ([RFC 6749][])
 End-to-end encryption            | [Autocrypt Level 1][], OpenPGP ([RFC 4880][]), Security Multiparts for MIME ([RFC 1847][]) and [“Mixed Up” Encryption repairing](https://tools.ietf.org/id/draft-dkg-openpgp-pgpmime-message-mangling-00.html)
 Detect/prevent active attacks    | [securejoin][] protocols
 Compare public keys              | [openpgp4fpr][] URI Scheme
-Header encryption                | [Protected Headers for Cryptographic E-mail](https://datatracker.ietf.org/doc/draft-autocrypt-lamps-protected-headers/)
+Header encryption                | [Header Protection for Cryptographically Protected E-mail](https://datatracker.ietf.org/doc/draft-ietf-lamps-header-protection/)
 Configuration assistance         | [Autoconfigure](https://web.archive.org/web/20210402044801/https://developer.mozilla.org/en-US/docs/Mozilla/Thunderbird/Autoconfiguration) and [Autodiscover][]
 Messenger functions              | [Chat-over-Email](https://github.com/deltachat/deltachat-core-rust/blob/master/spec.md#chat-mail-specification)
 Detect mailing list              | List-Id ([RFC 2919][]) and Precedence ([RFC 3834][])