diff options
Diffstat (limited to 'plugins/omemo/src/file_provider.vala')
| -rw-r--r-- | plugins/omemo/src/file_provider.vala | 168 |
1 files changed, 0 insertions, 168 deletions
diff --git a/plugins/omemo/src/file_provider.vala b/plugins/omemo/src/file_provider.vala deleted file mode 100644 index 938ec0cf..00000000 --- a/plugins/omemo/src/file_provider.vala +++ /dev/null @@ -1,168 +0,0 @@ -using Gee; -using Gtk; - -using Dino.Entities; -using Xmpp; -using Signal; - -namespace Dino.Plugins.Omemo { - -public class FileProvider : Dino.FileProvider, Object { - public string id { get { return "aesgcm"; } } - - private StreamInteractor stream_interactor; - private Dino.Database dino_db; - private Regex url_regex; - - public FileProvider(StreamInteractor stream_interactor, Dino.Database dino_db) { - this.stream_interactor = stream_interactor; - this.dino_db = dino_db; - this.url_regex = /^aesgcm:\/\/(.*)#(([A-Fa-f0-9]{2}){48}|([A-Fa-f0-9]{2}){44})$/; - - stream_interactor.get_module(MessageProcessor.IDENTITY).received_pipeline.connect(new ReceivedMessageListener(this)); - } - - private class ReceivedMessageListener : MessageListener { - - public string[] after_actions_const = new string[]{ "STORE" }; - public override string action_group { get { return ""; } } - public override string[] after_actions { get { return after_actions_const; } } - - private FileProvider outer; - private StreamInteractor stream_interactor; - - public ReceivedMessageListener(FileProvider outer) { - this.outer = outer; - this.stream_interactor = outer.stream_interactor; - } - - public override async bool run(Entities.Message message, Xmpp.MessageStanza stanza, Conversation conversation) { - if (message.body.has_prefix("aesgcm://") && outer.url_regex.match(message.body)) { - yield outer.on_file_message(message, conversation); - } - return false; - } - } - - private async void on_file_message(Entities.Message message, Conversation conversation) { - MatchInfo match_info; - this.url_regex.match(message.body, 0, out match_info); - string url_without_hash = match_info.fetch(1); - - FileTransfer file_transfer = new FileTransfer(); - file_transfer.account = conversation.account; - file_transfer.counterpart = message.counterpart; - file_transfer.ourpart = message.ourpart; - file_transfer.encryption = Encryption.NONE; - file_transfer.time = message.time; - file_transfer.local_time = message.local_time; - file_transfer.direction = message.direction; - file_transfer.file_name = url_without_hash.substring(url_without_hash.last_index_of("/") + 1); - file_transfer.size = -1; - file_transfer.state = FileTransfer.State.NOT_STARTED; - file_transfer.provider = 0; - file_transfer.info = message.id.to_string(); - - if (stream_interactor.get_module(FileManager.IDENTITY).is_sender_trustworthy(file_transfer, conversation)) { - yield get_meta_info(file_transfer); - if (file_transfer.size >= 0 && file_transfer.size < 5000000) { - ContentItem? content_item = stream_interactor.get_module(ContentItemStore.IDENTITY).get_item(conversation, 1, message.id); - if (content_item != null) { - stream_interactor.get_module(ContentItemStore.IDENTITY).set_item_hide(content_item, true); - } - } - file_incoming(file_transfer, conversation); - } - } - - public async void get_meta_info(FileTransfer file_transfer) { - string url_body = dino_db.message.select({dino_db.message.body}).with(dino_db.message.id, "=", int.parse(file_transfer.info))[dino_db.message.body]; - string url = this.aesgcm_to_https_link(url_body); - var session = new Soup.Session(); - var head_message = new Soup.Message("HEAD", url); - if (head_message != null) { - yield session.send_async(head_message, null); - - if (head_message.status_code >= 200 && head_message.status_code < 300) { - string? content_type = null, content_length = null; - head_message.response_headers.foreach((name, val) => { - if (name == "Content-Type") content_type = val; - if (name == "Content-Length") content_length = val; - }); - file_transfer.mime_type = content_type; - if (content_length != null) { - file_transfer.size = int.parse(content_length); - } - } else { - warning("HTTP HEAD download status code " + head_message.status_code.to_string()); - } - } - } - - public async void download(FileTransfer file_transfer, File file) { - try { - string url_body = dino_db.message.select({dino_db.message.body}).with(dino_db.message.id, "=", int.parse(file_transfer.info))[dino_db.message.body]; - string url = this.aesgcm_to_https_link(url_body); - var session = new Soup.Session(); - Soup.Request request = session.request(url); - - file_transfer.input_stream = yield decrypt_file(yield request.send_async(null), url_body); - file_transfer.encryption = Encryption.OMEMO; - - OutputStream os = file.create(FileCreateFlags.REPLACE_DESTINATION); - yield os.splice_async(file_transfer.input_stream, 0); - os.close(); - file_transfer.path = file.get_basename(); - file_transfer.input_stream = yield file.read_async(); - - file_transfer.state = FileTransfer.State.COMPLETE; - } catch (Error e) { - file_transfer.state = FileTransfer.State.FAILED; - } - } - - public async InputStream? decrypt_file(InputStream input_stream, string url) { - // Decode IV and key - MatchInfo match_info; - this.url_regex.match(url, 0, out match_info); - uint8[] iv_and_key = hex_to_bin(match_info.fetch(2).up()); - uint8[] iv, key; - if (iv_and_key.length == 44) { - iv = iv_and_key[0:12]; - key = iv_and_key[12:44]; - } else { - iv = iv_and_key[0:16]; - key = iv_and_key[16:48]; - } - - // Read data - uint8[] buf = new uint8[256]; - Array<uint8> data = new Array<uint8>(false, true, 0); - size_t len = -1; - do { - len = yield input_stream.read_async(buf); - data.append_vals(buf, (uint) len); - } while(len > 0); - - // Decrypt - uint8[] cleartext = Signal.aes_decrypt(Cipher.AES_GCM_NOPADDING, key, iv, data.data); - return new MemoryInputStream.from_data(cleartext); - } - - private uint8[] hex_to_bin(string hex) { - uint8[] bin = new uint8[hex.length / 2]; - const string HEX = "0123456789ABCDEF"; - for (int i = 0; i < hex.length / 2; i++) { - bin[i] = (uint8) (HEX.index_of_char(hex[i*2]) << 4) | HEX.index_of_char(hex[i*2+1]); - } - return bin; - } - - private string aesgcm_to_https_link(string aesgcm_link) { - MatchInfo match_info; - this.url_regex.match(aesgcm_link, 0, out match_info); - return "https://" + match_info.fetch(1); - } -} - -} |