WIP: feat: add option to process unencrypted messages

Bumps [data-encoding](https://github.com/ia0/data-encoding) from 2.10.0 to 2.11.0.
- [Commits](https://github.com/ia0/data-encoding/compare/v2.10.0...v2.11.0)

---
updated-dependencies:
- dependency-name: data-encoding
  dependency-version: 2.11.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Cargo.lock

@@ -934,9 +934,9 @@ checksum = "3d7b894f5411737b7867f4827955924d7c254fc9f4d91a6aad6b097804b1018b"
 
 [[package]]
 name = "colorutils-rs"
-version = "0.7.6"
+version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6e2fc25857fa523662de5cae84225b0e7bfb24a2a3f9ed8802fecf03df7252b1"
+checksum = "69abc9a8ed011e2b7946769f460b9e76e8b659ece9ef4001b9d8bba3489f796d"
 dependencies = [
  "erydanos",
  "half",
@@ -1301,9 +1301,9 @@ dependencies = [
 
 [[package]]
 name = "data-encoding"
-version = "2.10.0"
+version = "2.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d7a1e2f27636f116493b8b860f5546edb47c8d8f8ea73e1d2a20be88e28d1fea"
+checksum = "a4ae5f15dda3c708c0ade84bfee31ccab44a3da4f88015ed22f63732abe300c8"
 
 [[package]]
 name = "dbl"
@@ -1400,7 +1400,7 @@ dependencies = [
  "url",
  "uuid",
  "walkdir",
- "webpki-roots 1.0.7",
+ "webpki-roots",
 ]
 
 [[package]]
@@ -2645,7 +2645,7 @@ dependencies = [
  "tokio",
  "tokio-rustls",
  "tower-service",
- "webpki-roots 0.26.11",
+ "webpki-roots",
 ]
 
 [[package]]
@@ -2662,7 +2662,7 @@ dependencies = [
  "hyper",
  "libc",
  "pin-project-lite",
- "socket2 0.5.9",
+ "socket2 0.6.3",
  "tokio",
  "tower-service",
  "tracing",
@@ -3009,7 +3009,7 @@ dependencies = [
  "tracing",
  "url",
  "wasm-bindgen-futures",
- "webpki-roots 0.26.11",
+ "webpki-roots",
  "x509-parser",
  "z32",
 ]
@@ -3195,7 +3195,7 @@ dependencies = [
  "tokio-websockets",
  "tracing",
  "url",
- "webpki-roots 0.26.11",
+ "webpki-roots",
  "ws_stream_wasm",
  "z32",
 ]
@@ -5007,7 +5007,7 @@ dependencies = [
  "wasm-bindgen-futures",
  "wasm-streams",
  "web-sys",
- "webpki-roots 0.26.11",
+ "webpki-roots",
  "windows-registry",
 ]
 
@@ -6765,18 +6765,9 @@ dependencies = [
 
 [[package]]
 name = "webpki-roots"
-version = "0.26.11"
+version = "0.26.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "521bc38abb08001b01866da9f51eb7c5d647a19260e00054a8c7fd5f9e57f7a9"
-dependencies = [
- "webpki-roots 1.0.7",
-]
-
-[[package]]
-name = "webpki-roots"
-version = "1.0.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "52f5ee44c96cf55f1b349600768e3ece3a8f26010c05265ab73f945bb1a2eb9d"
+checksum = "2210b291f7ea53617fbafcc4939f10914214ec15aace5ba62293a668f322c5c9"
 dependencies = [
  "rustls-pki-types",
 ]

Cargo.toml

@@ -53,7 +53,7 @@ blake3 = "1.8.2"
 brotli = { version = "8", default-features=false, features = ["std"] }
 bytes = "1"
 chrono = { workspace = true, features = ["alloc", "clock", "std"] }
-colorutils-rs = { version = "0.7.5", default-features = false }
+colorutils-rs = { version = "0.8.0", default-features = false }
 data-encoding = "2.9.0"
 escaper = "0.1"
 fast-socks5 = "1"
@@ -111,7 +111,7 @@ tracing = "0.1.41"
 url = "2"
 uuid = { version = "1", features = ["serde", "v4"] }
 walkdir = "2.5.0"
-webpki-roots = "1.0"
+webpki-roots = "0.26.8"
 
 [dev-dependencies]
 anyhow = { workspace = true, features = ["backtrace"] } # Enable `backtrace` feature in tests.

src/chatlist.rs

@@ -473,6 +473,7 @@ mod tests {
         add_contact_to_chat, create_broadcast, create_group, get_chat_contacts,
         remove_contact_from_chat, send_text_msg, set_chat_name,
     };
+    use crate::config::Config;
     use crate::receive_imf::receive_imf;
     use crate::securejoin::get_securejoin_qr;
     use crate::stock_str::StockMessage;
@@ -665,6 +666,7 @@ mod tests {
     #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
     async fn test_search_single_chat() -> anyhow::Result<()> {
         let t = TestContext::new_alice().await;
+        t.set_config(Config::ProcessUnencrypted, Some("1")).await?;
 
         // receive a one-to-one-message
         receive_imf(
@@ -725,6 +727,7 @@ mod tests {
     #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
     async fn test_search_single_chat_without_authname() -> anyhow::Result<()> {
         let t = TestContext::new_alice().await;
+        t.set_config(Config::ProcessUnencrypted, Some("1")).await?;
 
         // receive a one-to-one-message without authname set
         receive_imf(

src/config.rs

@@ -486,6 +486,11 @@ pub enum Config {
     /// Experimental option denoting that the current profile is shared between multiple team members.
     /// For now, the only effect of this option is that seen flags are not synchronized.
     TeamProfile,
+
+    /// Process unencrypted messages.
+    ///
+    /// Unencrypted messages are fetched and processed only if this setting is explicitly enabled.
+    ProcessUnencrypted,
 }
 
 impl Config {

src/context.rs

@@ -1056,6 +1056,12 @@ impl Context {
             "team_profile",
             self.get_config_bool(Config::TeamProfile).await?.to_string(),
         );
+        res.insert(
+            "process_unencrypted",
+            self.get_config_bool(Config::ProcessUnencrypted)
+                .await?
+                .to_string(),
+        );
 
         let elapsed = time_elapsed(&self.creation_time);
         res.insert("uptime", duration_to_str(elapsed));

src/imap.rs

@@ -1996,12 +1996,21 @@ pub(crate) async fn prefetch_should_download(
     // prevent_rename=true as this might be a mailing list message and in this case it would be bad if we rename the contact.
     // (prevent_rename is the last argument of from_field_to_contact_id())
 
+    let is_encrypted = if let Some(content_type) = headers.get_header_value(HeaderDef::ContentType)
+    {
+        mailparse::parse_content_type(&content_type).mimetype == "multipart/encrypted"
+    } else {
+        false
+    };
+
     if flags.any(|f| f == Flag::Draft) {
         info!(context, "Ignoring draft message");
         return Ok(false);
     }
 
-    let should_download = !blocked_contact || maybe_ndn;
+    let should_download = maybe_ndn
+        || (!blocked_contact
+            && (is_encrypted || context.get_config_bool(Config::ProcessUnencrypted).await?));
     Ok(should_download)
 }
 

src/imap/session.rs

@@ -21,6 +21,7 @@ const PREFETCH_FLAGS: &str = "(UID RFC822.SIZE BODY.PEEK[HEADER.FIELDS (\
                               DATE \
                               X-MICROSOFT-ORIGINAL-MESSAGE-ID \
                               FROM \
+                              CONTENT-TYPE \
                               CHAT-VERSION \
                               CHAT-IS-POST-MESSAGE \
                               AUTOCRYPT-SETUP-MESSAGE\

src/receive_imf.rs

@@ -505,6 +505,11 @@ pub(crate) async fn receive_imf_inner(
         Ok(mime_parser) => mime_parser,
     };
 
+    if !mime_parser.was_encrypted() && !context.get_config_bool(Config::ProcessUnencrypted).await? {
+        warn!(context, "Fetched unencrypted message, ignoring");
+        return trash().await;
+    }
+
     let rfc724_mid_orig = &mime_parser
         .get_rfc724_mid()
         .unwrap_or(rfc724_mid.to_string());