release: Bump to 0.3.0

CHANGELOG.md

@@ -20,3 +20,13 @@
 
 - Add `isRatchetAcknowledged`
 - Ratchets that are created due to accepting a kex are now unacknowledged
+
+## 0.3.0
+
+- Implement enabling and disabling ratchets via the TrustManager interface
+- Fix deserialization of the various objects
+- Remove the BTBV TrustManager's loadState method. Just use the constructor
+- Allow removing all ratchets for a given Jid
+- If an error occurs while decrypting the message, the ratchet will now be reset to its prior state
+- Fix a bug within the Varint encoding function. This should fix some occasional UnknownSignedPrekeyExceptions
+- Remove OmemoSessionManager's toJson and fromJson. Use toJsonWithoutSessions and fromJsonWithoutSessions. Restoring sessions is not out-of-scope for that function

lib/src/omemo/sessionmanager.dart

@@ -97,12 +97,7 @@ class OmemoSessionManager {
 
   /// Returns our own device.
   Future<Device> getDevice() async {
-    Device? dev;
-    await _deviceLock.synchronized(() async {
-      dev = _device;
-    });
-
-    return dev!;
+    return _deviceLock.synchronized(() => _device);
   }
 
   /// Returns the id attribute of our own device. This is just a short-hand for
@@ -177,14 +172,14 @@ class OmemoSessionManager {
   Future<void> _addSessionFromKeyExchange(String jid, int deviceId, OmemoKeyExchange kex) async {
     // Pick the correct SPK
     final device = await getDevice();
-    OmemoKeyPair? spk;
-
-    await _lock.synchronized(() async {
+    final spk = await _lock.synchronized(() async {
       if (kex.spkId == _device.spkId) {
-        spk = _device.spk;
+        return _device.spk;
       } else if (kex.spkId == _device.oldSpkId) {
-        spk = _device.oldSpk;
+        return _device.oldSpk;
       }
+
+      return null;
     });
     if (spk == null) {
       throw UnknownSignedPrekeyException();
@@ -196,12 +191,12 @@ class OmemoSessionManager {
         OmemoPublicKey.fromBytes(kex.ek!, KeyPairType.x25519),
         kex.pkId!,
       ),
-      spk!,
+      spk,
       device.opks.values.elementAt(kex.pkId!),
       device.ik,
     );
     final ratchet = await OmemoDoubleRatchet.acceptNewSession(
-      spk!,
+      spk,
       OmemoPublicKey.fromBytes(kex.ik!, KeyPairType.ed25519),
       kexResult.sk,
       kexResult.ad,

pubspec.yaml

@@ -1,6 +1,6 @@
 name: omemo_dart
 description: An XMPP library independent OMEMO library
-version: 0.2.1
+version: 0.3.0
 homepage: https://github.com/PapaTutuWawa/omemo_dart
 publish_to: https://git.polynom.me/api/packages/PapaTutuWawa/pub