diff options
Diffstat (limited to 'plugins/omemo/src/stream_module.vala')
| -rw-r--r-- | plugins/omemo/src/stream_module.vala | 137 |
1 files changed, 76 insertions, 61 deletions
diff --git a/plugins/omemo/src/stream_module.vala b/plugins/omemo/src/stream_module.vala index 46bc0ecf..75a919f7 100644 --- a/plugins/omemo/src/stream_module.vala +++ b/plugins/omemo/src/stream_module.vala @@ -117,70 +117,10 @@ public class StreamModule : XmppStreamModule { this.store = Plugin.get_context().create_store(); store_created(store); - stream.get_module(Message.Module.IDENTITY).pre_received_message.connect(on_pre_received_message); + stream.get_module(Message.Module.IDENTITY).received_pipeline.connect(new ReceivedPipelineListener(store)); stream.get_module(Pubsub.Module.IDENTITY).add_filtered_notification(stream, NODE_DEVICELIST, (stream, jid, id, node) => on_devicelist(stream, jid, id, node)); } - private void on_pre_received_message(XmppStream stream, Message.Stanza message) { - StanzaNode? _encrypted = message.stanza.get_subnode("encrypted", NS_URI); - if (_encrypted == null || MessageFlag.get_flag(message) != null || message.from == null) return; - StanzaNode encrypted = (!)_encrypted; - if (!Plugin.ensure_context()) return; - MessageFlag flag = new MessageFlag(); - message.add_flag(flag); - StanzaNode? _header = encrypted.get_subnode("header"); - if (_header == null) return; - StanzaNode header = (!)_header; - if (header.get_attribute_int("sid") <= 0) return; - foreach (StanzaNode key_node in header.get_subnodes("key")) { - if (key_node.get_attribute_int("rid") == store.local_registration_id) { - try { - string? payload = encrypted.get_deep_string_content("payload"); - string? iv_node = header.get_deep_string_content("iv"); - string? key_node_content = key_node.get_string_content(); - if (payload == null || iv_node == null || key_node_content == null) continue; - uint8[] key; - uint8[] ciphertext = Base64.decode((!)payload); - uint8[] iv = Base64.decode((!)iv_node); - Address address = new Address(get_bare_jid((!)message.from), header.get_attribute_int("sid")); - if (key_node.get_attribute_bool("prekey")) { - PreKeySignalMessage msg = Plugin.get_context().deserialize_pre_key_signal_message(Base64.decode((!)key_node_content)); - SessionCipher cipher = store.create_session_cipher(address); - key = cipher.decrypt_pre_key_signal_message(msg); - } else { - SignalMessage msg = Plugin.get_context().deserialize_signal_message(Base64.decode((!)key_node_content)); - SessionCipher cipher = store.create_session_cipher(address); - key = cipher.decrypt_signal_message(msg); - } - address.device_id = 0; // TODO: Hack to have address obj live longer - - if (key.length >= 32) { - int authtaglength = key.length - 16; - uint8[] new_ciphertext = new uint8[ciphertext.length + authtaglength]; - uint8[] new_key = new uint8[16]; - Memory.copy(new_ciphertext, ciphertext, ciphertext.length); - Memory.copy((uint8*)new_ciphertext + ciphertext.length, (uint8*)key + 16, authtaglength); - Memory.copy(new_key, key, 16); - ciphertext = new_ciphertext; - key = new_key; - } - - message.body = arr_to_str(aes_decrypt(Cipher.AES_GCM_NOPADDING, key, iv, ciphertext)); - flag.decrypted = true; - } catch (Error e) { - if (Plugin.DEBUG) print(@"OMEMO: Signal error while decrypting message: $(e.message)\n"); - } - } - } - } - - private string arr_to_str(uint8[] arr) { - // null-terminate the array - uint8[] rarr = new uint8[arr.length+1]; - Memory.copy(rarr, arr, arr.length); - return (string)rarr; - } - public void request_user_devicelist(XmppStream stream, string jid) { if (active_devicelist_requests.add(jid)) { if (Plugin.DEBUG) print(@"OMEMO: requesting device list for $jid\n"); @@ -442,4 +382,79 @@ public class StreamModule : XmppStreamModule { } } + +public class ReceivedPipelineListener : StanzaListener<Message.Stanza> { + + private const string[] after_actions_const = {"EXTRACT_MESSAGE_2"}; + + public override string action_group { get { return "ENCRYPT_BODY"; } } + public override string[] after_actions { get { return after_actions_const; } } + + private Store store; + + public ReceivedPipelineListener(Store store) { + this.store = store; + } + + public override async void run(Core.XmppStream stream, Message.Stanza message) { + StanzaNode? _encrypted = message.stanza.get_subnode("encrypted", NS_URI); + if (_encrypted == null || MessageFlag.get_flag(message) != null || message.from == null) return; + StanzaNode encrypted = (!)_encrypted; + if (!Plugin.ensure_context()) return; + MessageFlag flag = new MessageFlag(); + message.add_flag(flag); + StanzaNode? _header = encrypted.get_subnode("header"); + if (_header == null) return; + StanzaNode header = (!)_header; + if (header.get_attribute_int("sid") <= 0) return; + foreach (StanzaNode key_node in header.get_subnodes("key")) { + if (key_node.get_attribute_int("rid") == store.local_registration_id) { + try { + string? payload = encrypted.get_deep_string_content("payload"); + string? iv_node = header.get_deep_string_content("iv"); + string? key_node_content = key_node.get_string_content(); + if (payload == null || iv_node == null || key_node_content == null) continue; + uint8[] key; + uint8[] ciphertext = Base64.decode((!)payload); + uint8[] iv = Base64.decode((!)iv_node); + Address address = new Address(get_bare_jid((!)message.from), header.get_attribute_int("sid")); + if (key_node.get_attribute_bool("prekey")) { + PreKeySignalMessage msg = Plugin.get_context().deserialize_pre_key_signal_message(Base64.decode((!)key_node_content)); + SessionCipher cipher = store.create_session_cipher(address); + key = cipher.decrypt_pre_key_signal_message(msg); + } else { + SignalMessage msg = Plugin.get_context().deserialize_signal_message(Base64.decode((!)key_node_content)); + SessionCipher cipher = store.create_session_cipher(address); + key = cipher.decrypt_signal_message(msg); + } + address.device_id = 0; // TODO: Hack to have address obj live longer + + if (key.length >= 32) { + int authtaglength = key.length - 16; + uint8[] new_ciphertext = new uint8[ciphertext.length + authtaglength]; + uint8[] new_key = new uint8[16]; + Memory.copy(new_ciphertext, ciphertext, ciphertext.length); + Memory.copy((uint8*)new_ciphertext + ciphertext.length, (uint8*)key + 16, authtaglength); + Memory.copy(new_key, key, 16); + ciphertext = new_ciphertext; + key = new_key; + } + + message.body = arr_to_str(aes_decrypt(Cipher.AES_GCM_NOPADDING, key, iv, ciphertext)); + flag.decrypted = true; + } catch (Error e) { + if (Plugin.DEBUG) print(@"OMEMO: Signal error while decrypting message: $(e.message)\n"); + } + } + } + } + + private string arr_to_str(uint8[] arr) { + // null-terminate the array + uint8[] rarr = new uint8[arr.length+1]; + Memory.copy(rarr, arr, arr.length); + return (string)rarr; + } +} + } |