refactor(imex): almost all unsafe gone here

deltachat-ffi/src/lib.rs

@@ -1528,9 +1528,17 @@ pub unsafe extern "C" fn dc_imex(
         eprintln!("ignoring careless call to dc_imex()");
         return;
     }
+    let what = match imex::ImexMode::from_i32(what as i32) {
+        Some(what) => what,
+        None => {
+            eprintln!("ignoring invalid argument {} to dc_imex", what);
+            return;
+        }
+    };
+
     let ffi_context = &*context;
     ffi_context
-        .with_inner(|ctx| dc_imex::dc_imex(ctx, what, as_opt_str(param1)))
+        .with_inner(|ctx| imex::imex(ctx, what, as_opt_str(param1)))
         .ok();
 }
 
@@ -1545,7 +1553,7 @@ pub unsafe extern "C" fn dc_imex_has_backup(
     }
     let ffi_context = &*context;
     ffi_context
-        .with_inner(|ctx| match dc_imex::dc_imex_has_backup(ctx, as_str(dir)) {
+        .with_inner(|ctx| match imex::has_backup(ctx, as_str(dir)) {
             Ok(res) => res.strdup(),
             Err(err) => {
                 error!(ctx, "dc_imex_has_backup: {}", err);
@@ -1563,7 +1571,7 @@ pub unsafe extern "C" fn dc_initiate_key_transfer(context: *mut dc_context_t) ->
     }
     let ffi_context = &*context;
     ffi_context
-        .with_inner(|ctx| match dc_imex::dc_initiate_key_transfer(ctx) {
+        .with_inner(|ctx| match imex::initiate_key_transfer(ctx) {
             Ok(res) => res.strdup(),
             Err(err) => {
                 error!(ctx, "dc_initiate_key_transfer(): {}", err);
@@ -1588,15 +1596,15 @@ pub unsafe extern "C" fn dc_continue_key_transfer(
     }
     let ffi_context = &*context;
     ffi_context
-        .with_inner(|ctx| {
-            match dc_imex::dc_continue_key_transfer(ctx, msg_id, as_str(setup_code)) {
+        .with_inner(
+            |ctx| match imex::continue_key_transfer(ctx, msg_id, as_str(setup_code)) {
                 Ok(()) => 1,
                 Err(err) => {
                     error!(ctx, "dc_continue_key_transfer: {}", err);
                     0
                 }
-            }
-        })
+            },
+        )
         .unwrap_or(0)
 }
 

examples/repl/cmdline.rs

@@ -8,10 +8,10 @@ use deltachat::configure::*;
 use deltachat::constants::*;
 use deltachat::contact::*;
 use deltachat::context::*;
-use deltachat::dc_imex::*;
 use deltachat::dc_receive_imf::*;
 use deltachat::dc_tools::*;
 use deltachat::error::Error;
+use deltachat::imex::*;
 use deltachat::job::*;
 use deltachat::location;
 use deltachat::lot::LotState;
@@ -102,7 +102,7 @@ fn dc_poke_eml_file(context: &Context, filename: impl AsRef<Path>) -> Result<(),
 
 /// Import a file to the database.
 /// For testing, import a folder with eml-files, a single eml-file, e-mail plus public key and so on.
-/// For normal importing, use dc_imex().
+/// For normal importing, use imex().
 ///
 /// @private @memberof Context
 /// @param context The context as created by dc_context_new().
@@ -405,7 +405,7 @@ pub unsafe fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::E
                  ============================================="
             ),
         },
-        "initiate-key-transfer" => match dc_initiate_key_transfer(context) {
+        "initiate-key-transfer" => match initiate_key_transfer(context) {
             Ok(setup_code) => println!(
                 "Setup code for the transferred setup message: {}",
                 setup_code,
@@ -432,28 +432,28 @@ pub unsafe fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::E
                 !arg1.is_empty() && !arg2.is_empty(),
                 "Arguments <msg-id> <setup-code> expected"
             );
-            dc_continue_key_transfer(context, arg1.parse()?, &arg2)?;
+            continue_key_transfer(context, arg1.parse()?, &arg2)?;
         }
         "has-backup" => {
-            dc_imex_has_backup(context, blobdir)?;
+            has_backup(context, blobdir)?;
         }
         "export-backup" => {
-            dc_imex(context, 11, Some(blobdir));
+            imex(context, ImexMode::ExportBackup, Some(blobdir));
         }
         "import-backup" => {
             ensure!(!arg1.is_empty(), "Argument <backup-file> missing.");
-            dc_imex(context, 12, Some(arg1));
+            imex(context, ImexMode::ImportBackup, Some(arg1));
         }
         "export-keys" => {
-            dc_imex(context, 1, Some(blobdir));
+            imex(context, ImexMode::ExportSelfKeys, Some(blobdir));
         }
         "import-keys" => {
-            dc_imex(context, 2, Some(blobdir));
+            imex(context, ImexMode::ImportSelfKeys, Some(blobdir));
         }
         "export-setup" => {
-            let setup_code = dc_create_setup_code(context);
+            let setup_code = create_setup_code(context);
             let file_name = blobdir.join("autocrypt-setup-message.html");
-            let file_content = dc_render_setup_file(context, &setup_code)?;
+            let file_content = render_setup_file(context, &setup_code)?;
             std::fs::write(&file_name, file_content)?;
             println!(
                 "Setup message written to: {}\nSetup code: {}",

src/constants.rs

@@ -64,15 +64,6 @@ pub const DC_GCL_ADD_SELF: usize = 0x02;
 pub(crate) const DC_FP_NO_AUTOCRYPT_HEADER: i32 = 2;
 pub(crate) const DC_FP_ADD_AUTOCRYPT_HEADER: i32 = 1;
 
-/// param1 is a directory where the keys are written to
-pub const DC_IMEX_EXPORT_SELF_KEYS: i32 = 1;
-/// param1 is a directory where the keys are searched in and read from
-pub const DC_IMEX_IMPORT_SELF_KEYS: i32 = 2;
-/// param1 is a directory where the backup is written to
-pub const DC_IMEX_EXPORT_BACKUP: i32 = 11;
-/// param1 is the file with the backup to import
-pub const DC_IMEX_IMPORT_BACKUP: i32 = 12;
-
 /// virtual chat showing all messages belonging to chats flagged with chats.blocked=2
 pub(crate) const DC_CHAT_ID_DEADDROP: u32 = 1;
 /// messages that should be deleted get this chat_id; the messages are deleted from the working thread later then. This is also needed as rfc724_mid should be preset as long as the message is not deleted on the server (otherwise it is downloaded again)

src/e2ee.rs

@@ -470,7 +470,7 @@ fn load_or_generate_self_public_key(context: &Context, self_addr: impl AsRef<str
                 &public_key,
                 &private_key,
                 &self_addr,
-                1,
+                true,
                 &context.sql,
             ) {
                 true => {

src/error.rs

@@ -26,6 +26,10 @@ pub enum Error {
     CStringError(crate::dc_tools::CStringError),
     #[fail(display = "PGP: {:?}", _0)]
     Pgp(pgp::errors::Error),
+    #[fail(display = "Base64Decode: {:?}", _0)]
+    Base64Decode(base64::DecodeError),
+    #[fail(display = "{:?}", _0)]
+    FromUtf8(std::string::FromUtf8Error),
 }
 
 pub type Result<T> = std::result::Result<T, Error>;
@@ -36,6 +40,12 @@ impl From<rusqlite::Error> for Error {
     }
 }
 
+impl From<base64::DecodeError> for Error {
+    fn from(err: base64::DecodeError) -> Error {
+        Error::Base64Decode(err)
+    }
+}
+
 impl From<failure::Error> for Error {
     fn from(err: failure::Error) -> Error {
         Error::Failure(err)
@@ -60,6 +70,12 @@ impl From<std::str::Utf8Error> for Error {
     }
 }
 
+impl From<std::string::FromUtf8Error> for Error {
+    fn from(err: std::string::FromUtf8Error) -> Error {
+        Error::FromUtf8(err)
+    }
+}
+
 impl From<image_meta::ImageError> for Error {
     fn from(err: image_meta::ImageError) -> Error {
         Error::Image(err)

src/events.rs

@@ -167,7 +167,7 @@ pub enum Event {
     #[strum(props(id = "2041"))]
     ConfigureProgress(usize),
 
-    /// Inform about the import/export progress started by dc_imex().
+    /// Inform about the import/export progress started by imex().
     ///
     /// @param data1 (usize) 0=error, 1-999=progress in permille, 1000=success and done
     /// @param data2 0
@@ -175,8 +175,8 @@ pub enum Event {
     #[strum(props(id = "2051"))]
     ImexProgress(usize),
 
-    /// A file has been exported. A file has been written by dc_imex().
-    /// This event may be sent multiple times by a single call to dc_imex().
+    /// A file has been exported. A file has been written by imex().
+    /// This event may be sent multiple times by a single call to imex().
     ///
     /// A typical purpose for a handler of this event may be to make the file public to some system
     /// services.

src/imex.rs

@@ -2,10 +2,7 @@ use std::ffi::CString;
 use std::path::Path;
 use std::ptr;
 
-use libc::{free, strlen};
-use mmime::mailmime::content::*;
-use mmime::mmapstring::*;
-use mmime::other::*;
+use num_traits::FromPrimitive;
 use rand::{thread_rng, Rng};
 
 use crate::chat;
@@ -25,12 +22,48 @@ use crate::pgp::*;
 use crate::sql::{self, Sql};
 use crate::stock::StockMessage;
 
-// import/export and tools
-// param1 is a directory where the keys are written to
-// param1 is a directory where the keys are searched in and read from
-// param1 is a directory where the backup is written to
-// param1 is the file with the backup to import
-pub fn dc_imex(context: &Context, what: libc::c_int, param1: Option<impl AsRef<Path>>) {
+#[derive(Debug, Display, Copy, Clone, PartialEq, Eq, FromPrimitive, ToPrimitive)]
+#[repr(i32)]
+pub enum ImexMode {
+    /// Export all private keys and all public keys of the user to the
+    /// directory given as `param1`.  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`
+    ExportSelfKeys = 1,
+    /// Import private keys found in the directory given as `param1`.
+    /// The last imported key is made the default keys unless its name contains the string `legacy`.
+    /// Public keys are not imported.
+    ImportSelfKeys = 2,
+    /// Export a backup to the directory given as `param1`.
+    /// The backup contains all contacts, chats, images and other data and device independent settings.
+    /// The backup does not contain device dependent settings as ringtones or LED notification settings.
+    /// The name of the backup is typically `delta-chat.<day>.bak`, if more than one backup is create on a day,
+    /// the format is `delta-chat.<day>-<number>.bak`
+    ExportBackup = 11,
+    /// `param1` is the file (not: directory) to import. The file is normally
+    /// created by DC_IMEX_EXPORT_BACKUP and detected by dc_imex_has_backup(). Importing a backup
+    /// is only possible as long as the context is not configured or used in another way.
+    ImportBackup = 12,
+}
+
+/// Import/export things.
+/// For this purpose, the function creates a job that is executed in the IMAP-thread then;
+/// this requires to call dc_perform_imap_jobs() regularly.
+///
+/// What to do is defined by the _what_ parameter.
+///
+/// While dc_imex() returns immediately, the started job may take a while,
+/// you can stop it using dc_stop_ongoing_process(). During execution of the job,
+/// some events are sent out:
+///
+/// - A number of #DC_EVENT_IMEX_PROGRESS events are sent and may be used to create
+///   a progress bar or stuff like that. Moreover, you'll be informed when the imex-job is done.
+///
+/// - For each file written on export, the function sends #DC_EVENT_IMEX_FILE_WRITTEN
+///
+/// Only one import-/export-progress can run at the same time.
+/// To cancel an import-/export-progress, use dc_stop_ongoing_process().
+pub fn imex(context: &Context, what: ImexMode, param1: Option<impl AsRef<Path>>) {
     let mut param = Params::new();
     param.set_int(Param::Cmd, what as i32);
     if let Some(param1) = param1 {
@@ -42,7 +75,7 @@ pub fn dc_imex(context: &Context, what: libc::c_int, param1: Option<impl AsRef<P
 }
 
 /// Returns the filename of the backup if found, nullptr otherwise.
-pub fn dc_imex_has_backup(context: &Context, dir_name: impl AsRef<Path>) -> Result<String> {
+pub fn has_backup(context: &Context, dir_name: impl AsRef<Path>) -> Result<String> {
     let dir_name = dir_name.as_ref();
     let dir_iter = std::fs::read_dir(dir_name)?;
     let mut newest_backup_time = 0;
@@ -75,10 +108,10 @@ pub fn dc_imex_has_backup(context: &Context, dir_name: impl AsRef<Path>) -> Resu
     }
 }
 
-pub fn dc_initiate_key_transfer(context: &Context) -> Result<String> {
+pub fn initiate_key_transfer(context: &Context) -> Result<String> {
     let mut msg: Message;
     ensure!(dc_alloc_ongoing(context), "could not allocate ongoing");
-    let setup_code = dc_create_setup_code(context);
+    let setup_code = create_setup_code(context);
     /* this may require a keypair to be created. this may take a second ... */
     if !context
         .running_state
@@ -87,7 +120,7 @@ pub fn dc_initiate_key_transfer(context: &Context) -> Result<String> {
         .unwrap()
         .shall_stop_ongoing
     {
-        if let Ok(ref setup_file_content) = dc_render_setup_file(context, &setup_code) {
+        if let Ok(ref setup_file_content) = render_setup_file(context, &setup_code) {
             /* encrypting may also take a while ... */
             if !context
                 .running_state
@@ -153,7 +186,7 @@ pub fn dc_initiate_key_transfer(context: &Context) -> Result<String> {
 /// Renders HTML body of a setup file message.
 ///
 /// The `passphrase` must be at least 2 characters long.
-pub fn dc_render_setup_file(context: &Context, passphrase: &str) -> Result<String> {
+pub fn render_setup_file(context: &Context, passphrase: &str) -> Result<String> {
     ensure!(
         passphrase.len() >= 2,
         "Passphrase must be at least 2 chars long."
@@ -203,7 +236,7 @@ pub fn dc_render_setup_file(context: &Context, passphrase: &str) -> Result<Strin
     ))
 }
 
-pub fn dc_create_setup_code(_context: &Context) -> String {
+pub fn create_setup_code(_context: &Context) -> String {
     let mut random_val: u16;
     let mut rng = thread_rng();
     let mut ret = String::new();
@@ -211,22 +244,22 @@ pub fn dc_create_setup_code(_context: &Context) -> String {
     for i in 0..9 {
         loop {
             random_val = rng.gen();
-            if !(random_val as libc::c_int > 60000) {
+            if !(random_val as usize > 60000) {
                 break;
             }
         }
-        random_val = (random_val as libc::c_int % 10000) as u16;
+        random_val = (random_val as usize % 10000) as u16;
         ret += &format!(
             "{}{:04}",
             if 0 != i { "-" } else { "" },
-            random_val as libc::c_int,
+            random_val as usize
         );
     }
 
     ret
 }
 
-pub fn dc_continue_key_transfer(context: &Context, msg_id: u32, setup_code: &str) -> Result<()> {
+pub fn continue_key_transfer(context: &Context, msg_id: u32, setup_code: &str) -> Result<()> {
     ensure!(msg_id > DC_MSG_ID_LAST_SPECIAL, "wrong id");
 
     let msg = Message::load_from_db(context, msg_id);
@@ -240,17 +273,14 @@ pub fn dc_continue_key_transfer(context: &Context, msg_id: u32, setup_code: &str
     );
 
     if let Some(filename) = msg.get_file(context) {
-        if let Ok(buf) = dc_read_file(context, filename) {
-            let norm_sc = CString::yolo(dc_normalize_setup_code(setup_code));
-            unsafe {
-                if let Ok(armored_key) =
-                    dc_decrypt_setup_file(context, norm_sc.as_ptr(), buf.as_ptr().cast())
-                {
-                    set_self_key(context, &armored_key, true, true)?;
-                } else {
-                    bail!("Bad setup code.")
-                }
+        if let Ok(ref mut buf) = dc_read_file(context, filename) {
+            let sc = normalize_setup_code(setup_code);
+            if let Ok(armored_key) = decrypt_setup_file(context, sc, buf) {
+                set_self_key(context, &armored_key, true, true)?;
+            } else {
+                bail!("Bad setup code.")
             }
+
             Ok(())
         } else {
             bail!("Cannot read Autocrypt Setup Message file.");
@@ -320,7 +350,7 @@ fn set_self_key(
         &public_key,
         &private_key,
         self_addr.unwrap(),
-        set_default as libc::c_int,
+        set_default,
         &context.sql,
     ) {
         bail!("Cannot save keypair, internal key-state possibly corrupted now!");
@@ -328,65 +358,56 @@ fn set_self_key(
     Ok(())
 }
 
-pub unsafe fn dc_decrypt_setup_file(
-    context: &Context,
-    passphrase: *const libc::c_char,
-    filecontent: *const libc::c_char,
+fn decrypt_setup_file(
+    _context: &Context,
+    passphrase: impl AsRef<str>,
+    filecontent: &mut [u8],
 ) -> Result<String> {
-    let fc_buf: *mut libc::c_char;
     let mut fc_headerline = String::default();
     let mut fc_base64: *const libc::c_char = ptr::null();
-    let mut binary: *mut libc::c_char = ptr::null_mut();
-    let mut binary_bytes: libc::size_t = 0;
-    let mut indx: libc::size_t = 0;
 
-    let mut payload: Result<String> = Err(format_err!("Failed to decrypt"));
+    let split_result = unsafe {
+        dc_split_armored_data(
+            filecontent.as_mut_ptr().cast(),
+            &mut fc_headerline,
+            ptr::null_mut(),
+            ptr::null_mut(),
+            &mut fc_base64,
+        )
+    };
 
-    fc_buf = dc_strdup(filecontent);
-    if dc_split_armored_data(
-        fc_buf,
-        &mut fc_headerline,
-        ptr::null_mut(),
-        ptr::null_mut(),
-        &mut fc_base64,
-    ) && fc_headerline == "-----BEGIN PGP MESSAGE-----"
-        && !fc_base64.is_null()
-    {
-        /* convert base64 to binary */
-        /*must be freed using mmap_string_unref()*/
-        if !(mailmime_base64_body_parse(
-            fc_base64,
-            strlen(fc_base64),
-            &mut indx,
-            &mut binary,
-            &mut binary_bytes,
-        ) != MAILIMF_NO_ERROR as libc::c_int
-            || binary.is_null()
-            || binary_bytes == 0)
-        {
-            /* decrypt symmetrically */
-            match dc_pgp_symm_decrypt(
-                as_str(passphrase),
-                std::slice::from_raw_parts(binary as *const u8, binary_bytes),
-            ) {
-                Ok(plain) => payload = Ok(String::from_utf8(plain).unwrap()),
-                Err(err) => {
-                    error!(context, "Failed to decrypt message: {:?}", err);
-                    payload = Err(err);
-                }
-            }
-        }
+    if !split_result || fc_headerline != "-----BEGIN PGP MESSAGE-----" || fc_base64.is_null() {
+        bail!("Invalid armored data");
     }
 
-    free(fc_buf as *mut libc::c_void);
-    if !binary.is_null() {
-        mmap_string_unref(binary);
-    }
+    // convert base64 to binary
+    let base64_encoded =
+        unsafe { std::slice::from_raw_parts(fc_base64 as *const u8, libc::strlen(fc_base64)) };
 
-    payload
+    let data = base64_decode(&base64_encoded)?;
+
+    // decrypt symmetrically
+    let payload = dc_pgp_symm_decrypt(passphrase.as_ref(), &data)?;
+    let payload_str = String::from_utf8(payload)?;
+
+    Ok(payload_str)
 }
 
-pub fn dc_normalize_setup_code(s: &str) -> String {
+/// Decode the base64 encoded slice. Handles line breaks.
+fn base64_decode(input: &[u8]) -> Result<Vec<u8>> {
+    use std::io::Read;
+    let c = std::io::Cursor::new(input);
+    let lr = pgp::line_reader::LineReader::new(c);
+    let br = pgp::base64_reader::Base64Reader::new(lr);
+    let mut reader = pgp::base64_decoder::Base64Decoder::new(br);
+
+    let mut data = Vec::new();
+    reader.read_to_end(&mut data)?;
+
+    Ok(data)
+}
+
+pub fn normalize_setup_code(s: &str) -> String {
     let mut out = String::new();
     for c in s.chars() {
         if c >= '0' && c <= '9' {
@@ -400,9 +421,9 @@ pub fn dc_normalize_setup_code(s: &str) -> String {
 }
 
 #[allow(non_snake_case)]
-pub fn dc_job_do_DC_JOB_IMEX_IMAP(context: &Context, job: &Job) -> Result<()> {
+pub fn job_do_DC_JOB_IMEX_IMAP(context: &Context, job: &Job) -> Result<()> {
     ensure!(dc_alloc_ongoing(context), "could not allocate ongoing");
-    let what = job.param.get_int(Param::Cmd).unwrap_or_default();
+    let what: Option<ImexMode> = job.param.get_int(Param::Cmd).and_then(ImexMode::from_i32);
     let param = job.param.get(Param::Arg).unwrap_or_default();
 
     ensure!(!param.is_empty(), "No Import/export dir/file given.");
@@ -410,8 +431,8 @@ pub fn dc_job_do_DC_JOB_IMEX_IMAP(context: &Context, job: &Job) -> Result<()> {
     context.call_cb(Event::ImexProgress(10));
 
     ensure!(context.sql.is_open(), "Database not opened.");
-    if what == DC_IMEX_EXPORT_BACKUP || what == DC_IMEX_EXPORT_SELF_KEYS {
-        /* before we export anything, make sure the private key exists */
+    if what == Some(ImexMode::ExportBackup) || what == Some(ImexMode::ExportSelfKeys) {
+        // before we export anything, make sure the private key exists
         if e2ee::ensure_secret_key_exists(context).is_err() {
             dc_free_ongoing(context);
             bail!("Cannot create private key or private key not available.");
@@ -421,12 +442,12 @@ pub fn dc_job_do_DC_JOB_IMEX_IMAP(context: &Context, job: &Job) -> Result<()> {
     }
     let path = Path::new(param);
     let success = match what {
-        DC_IMEX_EXPORT_SELF_KEYS => export_self_keys(context, path),
-        DC_IMEX_IMPORT_SELF_KEYS => import_self_keys(context, path),
-        DC_IMEX_EXPORT_BACKUP => unsafe { export_backup(context, path) },
-        DC_IMEX_IMPORT_BACKUP => import_backup(context, path),
-        _ => {
-            bail!("unknown IMEX type: {}", what);
+        Some(ImexMode::ExportSelfKeys) => export_self_keys(context, path),
+        Some(ImexMode::ImportSelfKeys) => import_self_keys(context, path),
+        Some(ImexMode::ExportBackup) => export_backup(context, path),
+        Some(ImexMode::ImportBackup) => import_backup(context, path),
+        None => {
+            bail!("unknown IMEX type");
         }
     };
     dc_free_ongoing(context);
@@ -443,11 +464,7 @@ pub fn dc_job_do_DC_JOB_IMEX_IMAP(context: &Context, job: &Job) -> Result<()> {
     }
 }
 
-/*******************************************************************************
- * Import backup
- ******************************************************************************/
-
-#[allow(non_snake_case)]
+/// Import Backup
 fn import_backup(context: &Context, backup_to_import: impl AsRef<Path>) -> Result<()> {
     info!(
         context,
@@ -523,13 +540,13 @@ fn import_backup(context: &Context, backup_to_import: impl AsRef<Path>) -> Resul
                     continue;
                 }
 
-                let pathNfilename = context.get_blobdir().join(file_name);
-                if dc_write_file(context, &pathNfilename, &file_blob) {
+                let path_filename = context.get_blobdir().join(file_name);
+                if dc_write_file(context, &path_filename, &file_blob) {
                     continue;
                 }
                 bail!(
                     "Storage full? Cannot write file {} with {} bytes.",
-                    pathNfilename.display(),
+                    path_filename.display(),
                     file_blob.len(),
                 );
             }
@@ -550,8 +567,7 @@ fn import_backup(context: &Context, backup_to_import: impl AsRef<Path>) -> Resul
  ******************************************************************************/
 /* the FILE_PROGRESS macro calls the callback with the permille of files processed.
 The macro avoids weird values of 0% or 100% while still working. */
-#[allow(non_snake_case)]
-unsafe fn export_backup(context: &Context, dir: impl AsRef<Path>) -> Result<()> {
+fn export_backup(context: &Context, dir: impl AsRef<Path>) -> Result<()> {
     let mut ok_to_continue = true;
     let mut success = false;
 
@@ -650,9 +666,9 @@ unsafe fn export_backup(context: &Context, dir: impl AsRef<Path>) -> Result<()>
                                                     continue;
                                                 } else {
                                                     info!(context, "EXPORTing filename={}", name);
-                                                    let curr_pathNfilename = context.get_blobdir().join(entry.file_name());
+                                                    let curr_path_filename = context.get_blobdir().join(entry.file_name());
                                                     if let Ok(buf) =
-                                                        dc_read_file(context, &curr_pathNfilename)
+                                                        dc_read_file(context, &curr_path_filename)
                                                     {
                                                         if buf.is_empty() {
                                                             continue;
@@ -661,7 +677,7 @@ unsafe fn export_backup(context: &Context, dir: impl AsRef<Path>) -> Result<()>
                                                             error!(
                                                                 context,
                                                                 "Disk full? Cannot add file \"{}\" to backup.",
-                                                                curr_pathNfilename.display(),
+                                                                curr_path_filename.display(),
                                                             );
                                                             /* this is not recoverable! writing to the sqlite database should work! */
                                                             ok_to_continue = false;
@@ -773,7 +789,7 @@ fn import_self_keys(context: &Context, dir: impl AsRef<Path>) -> Result<()> {
                     ptr::null_mut(),
                     ptr::null_mut(),
                 );
-                free(buf2 as *mut libc::c_void);
+                libc::free(buf2 as *mut libc::c_void);
             }
             if split_res
                 && buf2_headerline.contains("-----BEGIN PGP PUBLIC KEY BLOCK-----")
@@ -884,7 +900,7 @@ mod tests {
         let t = test_context(Some(Box::new(logging_cb)));
 
         configure_alice_keypair(&t.ctx);
-        let msg = dc_render_setup_file(&t.ctx, "hello").unwrap();
+        let msg = render_setup_file(&t.ctx, "hello").unwrap();
         println!("{}", &msg);
         // Check some substrings, indicating things got substituted.
         // In particular note the mixing of `\r\n` and `\n` depending
@@ -910,10 +926,10 @@ mod tests {
     }
 
     #[test]
-    fn test_render_setup_file_newline_replace() {
+    fn otest_render_setup_file_newline_replace() {
         let t = test_context(Some(Box::new(ac_setup_msg_cb)));
         configure_alice_keypair(&t.ctx);
-        let msg = dc_render_setup_file(&t.ctx, "pw").unwrap();
+        let msg = render_setup_file(&t.ctx, "pw").unwrap();
         println!("{}", &msg);
         assert!(msg.contains("<p>hello<br>there</p>"));
     }
@@ -921,7 +937,7 @@ mod tests {
     #[test]
     fn test_create_setup_code() {
         let t = dummy_context();
-        let setupcode = dc_create_setup_code(&t.ctx);
+        let setupcode = create_setup_code(&t.ctx);
         assert_eq!(setupcode.len(), 44);
         assert_eq!(setupcode.chars().nth(4).unwrap(), '-');
         assert_eq!(setupcode.chars().nth(9).unwrap(), '-');
@@ -949,12 +965,65 @@ mod tests {
 
     #[test]
     fn test_normalize_setup_code() {
-        let norm = dc_normalize_setup_code("123422343234423452346234723482349234");
+        let norm = normalize_setup_code("123422343234423452346234723482349234");
         assert_eq!(norm, "1234-2234-3234-4234-5234-6234-7234-8234-9234");
 
-        let norm = dc_normalize_setup_code(
-            "\t1 2 3422343234- foo bar-- 423-45 2 34 6234723482349234      ",
-        );
+        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");
+
+    #[test]
+    fn test_split_and_decrypt() {
+        let ctx = dummy_context();
+        let context = &ctx.ctx;
+
+        let mut headerline = String::default();
+        let mut setupcodebegin = ptr::null();
+        let mut preferencrypt = ptr::null();
+
+        let mut buf_1 = S_EM_SETUPFILE.to_string();
+
+        unsafe {
+            assert!(dc_split_armored_data(
+                buf_1.as_mut_ptr().cast(),
+                &mut headerline,
+                &mut setupcodebegin,
+                &mut preferencrypt,
+                ptr::null_mut(),
+            ));
+        }
+        assert_eq!(headerline, "-----BEGIN PGP MESSAGE-----");
+        assert!(!setupcodebegin.is_null());
+
+        // TODO: verify that this is the right check
+        assert!(S_EM_SETUPCODE.starts_with(as_str(setupcodebegin)));
+
+        assert!(preferencrypt.is_null());
+
+        let mut setup_file = S_EM_SETUPFILE.to_string();
+        let mut decrypted = unsafe {
+            decrypt_setup_file(context, S_EM_SETUPCODE, setup_file.as_bytes_mut()).unwrap()
+        };
+
+        unsafe {
+            assert!(dc_split_armored_data(
+                decrypted.as_mut_ptr().cast(),
+                &mut headerline,
+                &mut setupcodebegin,
+                &mut preferencrypt,
+                ptr::null_mut(),
+            ));
+        }
+
+        assert_eq!(headerline, "-----BEGIN PGP PRIVATE KEY BLOCK-----");
+        assert!(setupcodebegin.is_null());
+        assert!(!preferencrypt.is_null());
+        assert_eq!(as_str(preferencrypt), "mutual",);
+    }
 }

src/job.rs

@@ -7,10 +7,10 @@ use crate::chat;
 use crate::configure::*;
 use crate::constants::*;
 use crate::context::Context;
-use crate::dc_imex::*;
 use crate::dc_tools::*;
 use crate::events::Event;
 use crate::imap::*;
+use crate::imex::*;
 use crate::location;
 use crate::login_param::LoginParam;
 use crate::message::{self, Message, MessageState};
@@ -824,7 +824,7 @@ fn job_perform(context: &Context, thread: Thread, probe_network: bool) {
                 Action::MoveMsg => job.do_DC_JOB_MOVE_MSG(context),
                 Action::SendMdn => job.do_DC_JOB_SEND(context),
                 Action::ConfigureImap => unsafe { dc_job_do_DC_JOB_CONFIGURE_IMAP(context) },
-                Action::ImexImap => match dc_job_do_DC_JOB_IMEX_IMAP(context, &job) {
+                Action::ImexImap => match job_do_DC_JOB_IMEX_IMAP(context, &job) {
                     Ok(()) => {}
                     Err(err) => {
                         error!(context, "{}", err);

src/key.rs

@@ -2,7 +2,6 @@ use std::collections::BTreeMap;
 use std::io::Cursor;
 use std::path::Path;
 
-use libc;
 use pgp::composed::{Deserializable, SignedPublicKey, SignedSecretKey};
 use pgp::ser::Serialize;
 use pgp::types::{KeyTrait, SecretKeyTrait};
@@ -254,14 +253,14 @@ pub fn dc_key_save_self_keypair(
     public_key: &Key,
     private_key: &Key,
     addr: impl AsRef<str>,
-    is_default: libc::c_int,
+    is_default: bool,
     sql: &Sql,
 ) -> bool {
     sql::execute(
         context,
         sql,
         "INSERT INTO keypairs (addr, is_default, public_key, private_key, created) VALUES (?,?,?,?,?);",
-        params![addr.as_ref(), is_default, public_key.to_bytes(), private_key.to_bytes(), time()],
+        params![addr.as_ref(), is_default as i32, public_key.to_bytes(), private_key.to_bytes(), time()],
     ).is_ok()
 }
 

src/lib.rs

@@ -39,36 +39,36 @@ pub mod contact;
 pub mod context;
 mod e2ee;
 mod imap;
+pub mod imex;
 pub mod job;
 mod job_thread;
 pub mod key;
 pub mod keyring;
 pub mod location;
+mod login_param;
 pub mod lot;
 pub mod message;
+mod mimefactory;
 pub mod oauth2;
 mod param;
 pub mod peerstate;
 pub mod pgp;
 pub mod qr;
+pub mod securejoin;
 mod smtp;
 pub mod sql;
 mod stock;
+mod token;
+#[macro_use]
+mod wrapmime;
 
 pub mod dc_array;
 mod dc_dehtml;
-pub mod dc_imex;
 pub mod dc_mimeparser;
 pub mod dc_receive_imf;
 mod dc_simplify;
 mod dc_strencode;
 pub mod dc_tools;
-mod login_param;
-mod mimefactory;
-pub mod securejoin;
-mod token;
-#[macro_use]
-mod wrapmime;
 
 #[cfg(test)]
 mod test_utils;

src/test_utils.rs

@@ -76,7 +76,7 @@ pub fn configure_alice_keypair(ctx: &Context) -> String {
         KeyType::Private,
     )
     .unwrap();
-    let saved = key::dc_key_save_self_keypair(&ctx, &public, &private, &addr, 1, &ctx.sql);
+    let saved = key::dc_key_save_self_keypair(&ctx, &public, &private, &addr, true, &ctx.sql);
     assert_eq!(saved, true, "Failed to save Alice's key");
     addr
 }

test-data/message/stress.txt

@@ -0,0 +1,125 @@
+-----BEGIN PGP MESSAGE-----
+Passphrase-Format: numeric9x4
+Passphrase-Begin: 17
+
+wy4ECQMI0jNRBQfVKHVg1+a2Yihd6JAjR9H0kk3oDVeX7nc4Oi+IjEtonUJt
+PQpO0tPWASWYuYvjZSuTz9r1yZYV+y4mu9bu9NEQoRlWg2wnbjoUoKk4emFF
+FweUj84iI6VWTCSRyMu5d5JS1RfOdX4CG/muLAegyIHezqYOEC0Z3b9Ci9rd
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