PGP encrypted file transfers

5 files changed, 98 insertions, 47 deletions

diff --git a/plugins/openpgp/src/in_file_processor.vala b/plugins/openpgp/src/in_file_processor.vala
new file mode 100644
index 00000000..2a06bbdf
--- /dev/null
+++ b/plugins/openpgp/src/in_file_processor.vala
@@ -0,0 +1,28 @@
+using Dino.Entities;
+
+namespace Dino.Plugins.OpenPgp {
+
+public class InFileProcessor : IncommingFileProcessor, Object {
+    public bool can_process(FileTransfer file_transfer) {
+        return file_transfer.file_name.has_suffix("pgp") || file_transfer.mime_type == "application/pgp-encrypted";
+    }
+
+    public void process(FileTransfer file_transfer) {
+        uint8[] buf = new uint8[256];
+        Array<uint8> data = new Array<uint8>(false, true, 0);
+        size_t len = -1;
+        do {
+            len = file_transfer.input_stream.read(buf);
+            data.append_vals(buf, (uint) len);
+        } while(len > 0);
+
+        uint8[] clear_data = GPGHelper.decrypt_data(data.data);
+        file_transfer.input_stream = new MemoryInputStream.from_data(clear_data, GLib.free);
+        file_transfer.encryption = Encryption.PGP;
+        if (file_transfer.file_name.has_suffix(".pgp")) {
+            file_transfer.file_name = file_transfer.file_name.substring(0, file_transfer.file_name.length - 4);
+        }
+    }
+}
+
+}
diff --git a/plugins/openpgp/src/manager.vala b/plugins/openpgp/src/manager.vala
index 4c8b6d13..74f6027c 100644
--- a/plugins/openpgp/src/manager.vala
+++ b/plugins/openpgp/src/manager.vala
@@ -30,6 +30,39 @@ public class Manager : StreamInteractionModule, Object {
         stream_interactor.get_module(MessageProcessor.IDENTITY).pre_message_send.connect(check_encypt);
     }
 
+    public GPG.Key[] get_key_fprs(Conversation conversation) {
+        Gee.List<string> keys = new Gee.ArrayList<string>();
+        keys.add(db.get_account_key(conversation.account));
+        if (conversation.type_ == Conversation.Type.GROUPCHAT) {
+            Gee.List<Jid> muc_jids = new Gee.ArrayList<Jid>();
+            Gee.List<Jid>? occupants = stream_interactor.get_module(MucManager.IDENTITY).get_occupants(conversation.counterpart, conversation.account);
+            if (occupants != null) muc_jids.add_all(occupants);
+            Gee.List<Jid>? offline_members = stream_interactor.get_module(MucManager.IDENTITY).get_offline_members(conversation.counterpart, conversation.account);
+            if (occupants != null) muc_jids.add_all(offline_members);
+
+            foreach (Jid jid in muc_jids) {
+                string? key_id = stream_interactor.get_module(Manager.IDENTITY).get_key_id(conversation.account, jid);
+                if (key_id != null && GPGHelper.get_keylist(key_id).size > 0 && !keys.contains(key_id)) {
+                    keys.add(key_id);
+                }
+            }
+        } else {
+            string? key_id = get_key_id(conversation.account, conversation.counterpart);
+            if (key_id != null) {
+                keys.add(key_id);
+            }
+        }
+        GPG.Key[] gpgkeys = new GPG.Key[keys.size];
+        for (int i = 0; i < keys.size; i++) {
+            try {
+                GPG.Key key = GPGHelper.get_public_key(keys[i]);
+                if (key != null) gpgkeys[i] = key;
+            } catch (Error e)  {}
+        }
+
+        return gpgkeys;
+    }
+
     private void on_pre_message_received(Entities.Message message, Xmpp.Message.Stanza message_stanza, Conversation conversation) {
         if (MessageFlag.get_flag(message_stanza) != null && MessageFlag.get_flag(message_stanza).decrypted) {
             message.encryption = Encryption.PGP;
@@ -38,45 +71,13 @@ public class Manager : StreamInteractionModule, Object {
 
     private void check_encypt(Entities.Message message, Xmpp.Message.Stanza message_stanza, Conversation conversation) {
         if (message.encryption == Encryption.PGP) {
-            bool encrypted = false;
-            if (conversation.type_ == Conversation.Type.CHAT) {
-                encrypted = encrypt_for_chat(message, message_stanza, conversation);
-            } else if (conversation.type_ == Conversation.Type.GROUPCHAT) {
-                encrypted = encrypt_for_groupchat(message, message_stanza, conversation);
-            }
-            if (!encrypted) message.marked = Entities.Message.Marked.WONTSEND;
-        }
-    }
-
-    private bool encrypt_for_chat(Entities.Message message, Xmpp.Message.Stanza message_stanza, Conversation conversation) {
-        Core.XmppStream? stream = stream_interactor.get_stream(conversation.account);
-        if (stream == null) return false;
-
-        string? key_id = get_key_id(conversation.account, message.counterpart);
-        if (key_id != null) {
-            return stream.get_module(Module.IDENTITY).encrypt(message_stanza, new Gee.ArrayList<string>.wrap(new string[]{key_id}));
-        }
-        return false;
-    }
-
-    private bool encrypt_for_groupchat(Entities.Message message, Xmpp.Message.Stanza message_stanza, Conversation conversation) {
-        Core.XmppStream? stream = stream_interactor.get_stream(conversation.account);
-        if (stream == null) return false;
-
-        Gee.List<Jid> muc_jids = new Gee.ArrayList<Jid>();
-        Gee.List<Jid>? occupants = stream_interactor.get_module(MucManager.IDENTITY).get_occupants(conversation.counterpart, conversation.account);
-        if (occupants != null) muc_jids.add_all(occupants);
-        Gee.List<Jid>? offline_members = stream_interactor.get_module(MucManager.IDENTITY).get_offline_members(conversation.counterpart, conversation.account);
-        if (occupants != null) muc_jids.add_all(offline_members);
-
-        Gee.List<string> keys = new Gee.ArrayList<string>();
-        foreach (Jid jid in muc_jids) {
-            string? key_id = stream_interactor.get_module(Manager.IDENTITY).get_key_id(conversation.account, jid);
-            if (key_id != null && GPGHelper.get_keylist(key_id).size > 0 && !keys.contains(key_id)) {
-                keys.add(key_id);
+            GPG.Key[] keys = get_key_fprs(conversation);
+            Core.XmppStream? stream = stream_interactor.get_stream(conversation.account);
+            if (stream != null) {
+                bool encrypted = stream.get_module(Module.IDENTITY).encrypt(message_stanza, keys);
+                if (!encrypted) message.marked = Entities.Message.Marked.WONTSEND;
             }
         }
-        return stream.get_module(Module.IDENTITY).encrypt(message_stanza, keys);
     }
 
     public string? get_key_id(Account account, Jid jid) {
diff --git a/plugins/openpgp/src/out_file_processor.vala b/plugins/openpgp/src/out_file_processor.vala
new file mode 100644
index 00000000..81c53b16
--- /dev/null
+++ b/plugins/openpgp/src/out_file_processor.vala
@@ -0,0 +1,27 @@
+using Dino.Entities;
+
+namespace Dino.Plugins.OpenPgp {
+
+public class OutFileProcessor : OutgoingFileProcessor, Object {
+
+    StreamInteractor stream_interactor;
+
+    public OutFileProcessor(StreamInteractor stream_interactor) {
+        this.stream_interactor = stream_interactor;
+    }
+
+    public bool can_process(Conversation conversation, FileTransfer file_transfer) {
+        return conversation.encryption == Encryption.PGP;
+    }
+
+    public void process(Conversation conversation, FileTransfer file_transfer) {
+        string uri = file_transfer.get_uri();
+        GPG.Key[] keys = stream_interactor.get_module(Manager.IDENTITY).get_key_fprs(conversation);
+        uint8[] enc_content = GPGHelper.encrypt_file(uri, keys, GPG.EncryptFlags.ALWAYS_TRUST);
+        file_transfer.input_stream = new MemoryInputStream.from_data(enc_content, GLib.free);
+        file_transfer.encryption = Encryption.PGP;
+        file_transfer.server_file_name = file_transfer.server_file_name + ".pgp";
+    }
+}
+
+}
diff --git a/plugins/openpgp/src/plugin.vala b/plugins/openpgp/src/plugin.vala
index 2f664656..7ec6c357 100644
--- a/plugins/openpgp/src/plugin.vala
+++ b/plugins/openpgp/src/plugin.vala
@@ -29,6 +29,8 @@ public class Plugin : Plugins.RootInterface, Object {
         app.stream_interactor.module_manager.initialize_account_modules.connect(on_initialize_account_modules);
 
         Manager.start(app.stream_interactor, db);
+        app.stream_interactor.get_module(FileManager.IDENTITY).add_outgoing_processor(new OutFileProcessor(app.stream_interactor));
+        app.stream_interactor.get_module(FileManager.IDENTITY).add_incomming_processor(new InFileProcessor());
 
         internationalize(GETTEXT_PACKAGE, app.search_path_generator.get_locale_path(GETTEXT_PACKAGE, LOCALE_INSTALL_DIR));
     }
diff --git a/plugins/openpgp/src/stream_module.vala b/plugins/openpgp/src/stream_module.vala
index 6c55cdc5..068370fd 100644
--- a/plugins/openpgp/src/stream_module.vala
+++ b/plugins/openpgp/src/stream_module.vala
@@ -33,11 +33,8 @@ namespace Dino.Plugins.OpenPgp {
             }
         }
 
-        public bool encrypt(Message.Stanza message, Gee.List<string> fprs) {
-            string[] encrypt_to = new string[fprs.size + 1];
-            for (int i = 0; i < fprs.size; i++) encrypt_to[i] = fprs[i];
-            encrypt_to[encrypt_to.length - 1] = own_key.fpr;
-            string? enc_body = gpg_encrypt(message.body, encrypt_to);
+        public bool encrypt(Message.Stanza message, GPG.Key[] keys) {
+            string? enc_body = gpg_encrypt(message.body, keys);
             if (enc_body != null) {
                 message.stanza.put_node(new StanzaNode.build("x", NS_URI_ENCRYPTED).add_self_xmlns().put_node(new StanzaNode.text(enc_body)));
                 message.body = "[This message is OpenPGP encrypted (see XEP-0027)]";
@@ -105,13 +102,9 @@ namespace Dino.Plugins.OpenPgp {
             }
         }
 
-        private static string? gpg_encrypt(string plain, string[] key_ids) {
-            GPG.Key[] keys = new GPG.Key[key_ids.length];
+        private static string? gpg_encrypt(string plain, GPG.Key[] keys) {
             string encr;
             try {
-                for (int i = 0; i < key_ids.length; i++) {
-                    keys[i] = GPGHelper.get_public_key(key_ids[i]);
-                }
                 encr = GPGHelper.encrypt_armor(plain, keys, GPG.EncryptFlags.ALWAYS_TRUST);
             } catch (Error e) {
                 return null;