Switching Tor identity works

extension.js

@@ -32,9 +32,19 @@ const TorButton = new Lang.Class({
         this.actor.add_child(this._icon);
         this.actor.connect('button-press-event', Lang.bind(this, function(actor, event) {
             if (event.get_click_count() >= 2) {
-                log('TOR DOUBLE CLICK!!!');
+                this._switchTorIdentity();
             }
         }));
+    },
+
+    _switchTorIdentity: function() {
+        try {
+            this._torControlClient.switchIdentity();
+            Main.notify('Switched to a new Tor identity!');
+        } catch (e) {
+            log(e);
+            Main.notifyError('Could not switch Tor identity: ' + e);
+        }
     }
 });
 
@@ -46,9 +56,10 @@ function init(extensionMeta) {
 function enable() {
     try {
         torControlClient = new TorControlClient();
-        torButton = new TorButton();
+        torButton = new TorButton(torControlClient);
         Main.panel.addToStatusArea(torButton.Name, torButton);
     } catch (e) {
+        log(e);
         Main.notifyError('Error starting extension: ' + e);
         disable();
     }

tor_control_client.js

@@ -11,6 +11,7 @@ const TorControlClient = new Lang.Class({
         this._connect();
         this._updateProtocolInfo();
         this._ensureProtocolCompatibility();
+        this.authenticate();
     },
 
     close: function() {
@@ -20,6 +21,23 @@ const TorControlClient = new Lang.Class({
         }
     },
 
+    authenticate: function() {
+        var cookie = this._readAuthCookie();
+        var reply = this._runCommand('AUTHENTICATE ' + cookie);
+
+        if (reply.statusCode != 250) {
+            throw 'Could not authenticate, reason: ' + reply.replyLines.join('\n');
+        }
+    },
+
+    switchIdentity: function() {
+        var reply = this._runCommand('SIGNAL NEWNYM');
+
+        if (reply.statusCode != 250) {
+            throw 'Could not change Tor identity, reason: ' + reply.replyLines.join('\n');
+        }
+    },
+
     _connect: function() {
         var socketClient = new Gio.SocketClient();
         this._connection = socketClient.connect_to_host('127.0.0.1:9051', null, null);
@@ -51,7 +69,7 @@ const TorControlClient = new Lang.Class({
 
                     if (authMethods.indexOf('COOKIE') != -1 || authMethods.indexOf('SAFECOOKIE') != -1) {
                         let cookieArg = tokens[2].split('=');
-                        authCookieFile = cookieArg[1];
+                        authCookieFile = cookieArg[1].substr(1, cookieArg[1].length - 2);   // strip quotes
                     }
                     break;
             }
@@ -101,6 +119,24 @@ const TorControlClient = new Lang.Class({
             isMidReplyLine: (line[3] == '-'),
             replyLine: line.substring(4)
         }
+    },
+
+    _readAuthCookie: function() {
+        var file = Gio.File.new_for_path(this._protocolInfo.authCookieFile);
+        var inputStream = file.read(null);
+        var cookieData = inputStream.read_bytes(32, null, null).get_data();
+        inputStream.close(null);
+
+        var authCookie = '';
+        for (var i = 0; i < cookieData.length; i++) {
+            let hexByte = cookieData[i].toString(16);
+            if (hexByte.length == 1) {
+                hexByte = '0' + hexByte;
+            }
+            authCookie += hexByte;
+        }
+
+        return authCookie;
     }
 });