using Dino.Entities; using Gee; using Signal; using Xmpp; namespace Dino.Plugins.Omemo { public class AesGcmFileSender : StreamInteractionModule, FileSender, Object { public static ModuleIdentity IDENTITY = new ModuleIdentity("http_files"); public string id { get { return IDENTITY.id; } } private StreamInteractor stream_interactor; private HashMap max_file_sizes = new HashMap(Account.hash_func, Account.equals_func); public AesGcmFileSender(StreamInteractor stream_interactor) { this.stream_interactor = stream_interactor; stream_interactor.stream_negotiated.connect(on_stream_negotiated); } public void send_file(Conversation conversation, FileTransfer file_transfer) { Xmpp.XmppStream? stream = stream_interactor.get_stream(file_transfer.account); uint8[] buf = new uint8[256]; Array data = new Array(false, true, 0); size_t len = -1; do { try { len = file_transfer.input_stream.read(buf); } catch (IOError error) { warning(@"HTTP upload: IOError reading stream: $(error.message)"); file_transfer.state = FileTransfer.State.FAILED; } data.append_vals(buf, (uint) len); } while(len > 0); //Create a key and use it to encrypt the file uint8[] iv = new uint8[16]; Plugin.get_context().randomize(iv); uint8[] key = new uint8[32]; Plugin.get_context().randomize(key); uint8[] ciphertext = aes_encrypt(Cipher.AES_GCM_NOPADDING, key, iv, data.data); // Convert iv and key to hex string iv_and_key = ""; foreach (uint8 byte in iv) iv_and_key += byte.to_string("%02x"); foreach (uint8 byte in key) iv_and_key += byte.to_string("%02x"); stream_interactor.module_manager.get_module(file_transfer.account, Xmpp.Xep.HttpFileUpload.Module.IDENTITY).request_slot(stream, file_transfer.server_file_name, (int) data.length, file_transfer.mime_type, (stream, url_down, url_up) => { Soup.Message message = new Soup.Message("PUT", url_up); message.set_request(file_transfer.mime_type, Soup.MemoryUse.COPY, ciphertext); Soup.Session session = new Soup.Session(); session.send_async.begin(message, null, (obj, res) => { try { session.send_async.end(res); if (message.status_code >= 200 && message.status_code < 300) { string aesgcm_link = url_down + "#" + iv_and_key; aesgcm_link = "aesgcm://" + aesgcm_link.substring(8); // replace https:// by aesgcm:// file_transfer.info = aesgcm_link; // store the message content temporarily so the message gets filtered out Entities.Message xmpp_message = stream_interactor.get_module(MessageProcessor.IDENTITY).create_out_message(aesgcm_link, conversation); xmpp_message.encryption = Encryption.OMEMO; stream_interactor.get_module(MessageProcessor.IDENTITY).send_message(xmpp_message, conversation); file_transfer.info = xmpp_message.id.to_string(); ContentItem? content_item = stream_interactor.get_module(ContentItemStore.IDENTITY).get_item(conversation, 1, xmpp_message.id); if (content_item != null) { stream_interactor.get_module(ContentItemStore.IDENTITY).set_item_hide(content_item, true); } } else { warning("HTTP status code " + message.status_code.to_string()); file_transfer.state = FileTransfer.State.FAILED; } } catch (Error e) { warning("HTTP upload error: " + e.message); file_transfer.state = FileTransfer.State.FAILED; } }); }, (stream, error) => { warning("HTTP upload error: " + error); file_transfer.state = FileTransfer.State.FAILED; } ); } public bool can_send(Conversation conversation, FileTransfer file_transfer) { return file_transfer.encryption == Encryption.OMEMO; } public bool is_upload_available(Conversation conversation) { lock (max_file_sizes) { return max_file_sizes.has_key(conversation.account); } } private void on_stream_negotiated(Account account, XmppStream stream) { stream_interactor.module_manager.get_module(account, Xmpp.Xep.HttpFileUpload.Module.IDENTITY).feature_available.connect((stream, max_file_size) => { lock (max_file_sizes) { max_file_sizes[account] = max_file_size; } upload_available(account); }); } } }