Add support for JET-OMEMO

1 files changed, 53 insertions, 0 deletions

diff --git a/plugins/omemo/src/jingle/jingle_helper.vala b/plugins/omemo/src/jingle/jingle_helper.vala
new file mode 100644
index 00000000..6814fd00
--- /dev/null
+++ b/plugins/omemo/src/jingle/jingle_helper.vala
@@ -0,0 +1,53 @@
+using Dino.Entities;
+using Xmpp;
+
+namespace Dino.Plugins.JetOmemo {
+public class EncryptionHelper : JingleFileEncryptionHelper, Object {
+    private StreamInteractor stream_interactor;
+
+    public EncryptionHelper(StreamInteractor stream_interactor) {
+        this.stream_interactor = stream_interactor;
+    }
+
+    public bool can_transfer(Conversation conversation) {
+        return true;
+    }
+
+    public bool can_encrypt(Conversation conversation, FileTransfer file_transfer, Jid? full_jid) {
+        XmppStream? stream = stream_interactor.get_stream(conversation.account);
+        if (stream == null) return false;
+
+        Gee.List<Jid>? resources = stream.get_flag(Presence.Flag.IDENTITY).get_resources(conversation.counterpart);
+        if (resources == null) return false;
+
+        if (full_jid == null) {
+            foreach (Jid test_jid in resources) {
+                if (stream.get_module(Module.IDENTITY).is_available(stream, test_jid)) {
+                    return true;
+                }
+            }
+        } else {
+            if (stream.get_module(Module.IDENTITY).is_available(stream, full_jid)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    public string? get_precondition_name(Conversation conversation, FileTransfer file_transfer) {
+        return Xep.Jet.NS_URI;
+    }
+
+    public Object? get_precondition_options(Conversation conversation, FileTransfer file_transfer) {
+        return new Xep.Jet.Options(Omemo.NS_URI, AES_128_GCM_URI);
+    }
+
+    public FileMeta complete_meta(FileTransfer file_transfer, FileReceiveData receive_data, FileMeta file_meta, Xmpp.Xep.JingleFileTransfer.FileTransfer jingle_transfer) {
+        Xep.Jet.SecurityParameters? security = jingle_transfer.security as Xep.Jet.SecurityParameters;
+        if (security != null && security.encoding.get_type_uri() == Omemo.NS_URI) {
+            file_transfer.encryption = Encryption.OMEMO;
+        }
+        return file_meta;
+    }
+}
+}
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