Support for web socket communication with no signaling key

js/background.js

@@ -681,7 +681,19 @@
       textsecure.storage.user.getDeviceId() != '1'
     ) {
       window.getSyncRequest();
-      window.getAccountManager().maybeUpdateDeviceName();
+
+      try {
+        const manager = window.getAccountManager();
+        await Promise.all([
+          manager.maybeUpdateDeviceName(),
+          manager.maybeDeleteSignalingKey(),
+        ]);
+      } catch (e) {
+        window.log.error(
+          'Problem with account manager updates after starting new version: ',
+          e && e.stack ? e.stack : e
+        );
+      }
     }
 
     const udSupportKey = 'hasRegisterSupportForUnauthenticatedDelivery';

js/modules/web_api.js

@@ -326,6 +326,7 @@ function HTTPError(message, providedCode, response, stack) {
 const URL_CALLS = {
   accounts: 'v1/accounts',
   updateDeviceName: 'v1/accounts/name',
+  removeSignalingKey: 'v1/accounts/signaling_key',
   attachment: 'v1/attachments',
   deliveryCert: 'v1/certificate/delivery',
   supportUnauthenticatedDelivery: 'v1/devices/unauthenticated_delivery',
@@ -388,6 +389,7 @@ function initialize({ url, cdnUrl, certificateAuthority, proxyUrl }) {
       sendMessagesUnauth,
       setSignedPreKey,
       updateDeviceName,
+      removeSignalingKey,
     };
 
     function _ajax(param) {
@@ -518,14 +520,12 @@ function initialize({ url, cdnUrl, certificateAuthority, proxyUrl }) {
       number,
       code,
       newPassword,
-      signalingKey,
       registrationId,
       deviceName,
       options = {}
     ) {
       const { accessKey } = options;
       const jsonData = {
-        signalingKey: _btoa(_getString(signalingKey)),
         supportsSms: false,
         fetchesMessages: true,
         registrationId,
@@ -580,6 +580,13 @@ function initialize({ url, cdnUrl, certificateAuthority, proxyUrl }) {
       });
     }
 
+    function removeSignalingKey() {
+      return _ajax({
+        call: 'removeSignalingKey',
+        httpType: 'DELETE',
+      });
+    }
+
     function getDevices() {
       return _ajax({
         call: 'devices',

libtextsecure/account_manager.js

@@ -99,6 +99,12 @@
     async deviceNameIsEncrypted() {
       await textsecure.storage.user.setDeviceNameEncrypted();
     },
+    async maybeDeleteSignalingKey() {
+      const key = await textsecure.storage.user.getSignalingKey();
+      if (key) {
+        await this.server.removeSignalingKey();
+      }
+    },
     registerSingleDevice(number, verificationCode) {
       const registerKeys = this.server.registerKeys.bind(this.server);
       const createAccount = this.createAccount.bind(this);
@@ -400,7 +406,6 @@
       options = {}
     ) {
       const { accessKey } = options;
-      const signalingKey = libsignal.crypto.getRandomBytes(32 + 20);
       let password = btoa(getString(libsignal.crypto.getRandomBytes(16)));
       password = password.substring(0, password.length - 2);
       const registrationId = libsignal.KeyHelper.generateRegistrationId();
@@ -417,7 +422,6 @@
         number,
         verificationCode,
         password,
-        signalingKey,
         registrationId,
         encryptedDeviceName,
         { accessKey }
@@ -441,7 +445,6 @@
 
       await Promise.all([
         textsecure.storage.remove('identityKey'),
-        textsecure.storage.remove('signaling_key'),
         textsecure.storage.remove('password'),
         textsecure.storage.remove('registrationId'),
         textsecure.storage.remove('number_id'),
@@ -464,7 +467,6 @@
       });
 
       await textsecure.storage.put('identityKey', identityKeyPair);
-      await textsecure.storage.put('signaling_key', signalingKey);
       await textsecure.storage.put('password', password);
       await textsecure.storage.put('registrationId', registrationId);
       if (profileKey) {

libtextsecure/message_receiver.js

@@ -274,8 +274,18 @@ MessageReceiver.prototype.extend({
       return;
     }
 
-    const promise = textsecure.crypto
+    let promise;
-      .decryptWebsocketMessage(request.body, this.signalingKey)
+    const headers = request.headers || [];
+    if (headers.includes('X-Signal-Key: true')) {
+      promise = textsecure.crypto.decryptWebsocketMessage(
+        request.body,
+        this.signalingKey
+      );
+    } else {
+      promise = Promise.resolve(request.body.toArrayBuffer());
+    }
+
+    promise = promise
       .then(plaintext => {
         const envelope = textsecure.protobuf.Envelope.decode(plaintext);
         // After this point, decoding errors are not the server's

libtextsecure/storage/user.js

@@ -39,5 +39,9 @@
     getDeviceNameEncrypted() {
       return textsecure.storage.get('deviceNameEncrypted');
     },
+
+    getSignalingKey() {
+      return textsecure.storage.get('signaling_key');
+    },
   };
 })();

libtextsecure/websocket-resources.js

@@ -27,6 +27,7 @@
   const Request = function Request(options) {
     this.verb = options.verb || options.type;
     this.path = options.path || options.url;
+    this.headers = options.headers;
     this.body = options.body || options.data;
     this.success = options.success;
     this.error = options.error;
@@ -50,6 +51,7 @@
     this.verb = request.verb;
     this.path = request.path;
     this.body = request.body;
+    this.headers = request.headers;
 
     this.respond = (status, message) => {
       socket.send(
@@ -77,6 +79,7 @@
           verb: request.verb,
           path: request.path,
           body: request.body,
+          headers: request.headers,
           id: request.id,
         },
       })
@@ -105,6 +108,7 @@
               verb: message.request.verb,
               path: message.request.path,
               body: message.request.body,
+              headers: message.request.headers,
               id: message.request.id,
               socket,
             })

protos/SubProtocol.proto

@@ -22,6 +22,7 @@ message WebSocketRequestMessage {
     optional string verb    = 1;
     optional string path    = 2;
     optional bytes  body    = 3;
+    repeated string headers = 5;
     optional uint64 id      = 4;
 }
 
@@ -29,6 +30,7 @@ message WebSocketResponseMessage {
     optional uint64 id      = 1;
     optional uint32 status  = 2;
     optional string message = 3;
+    repeated string headers = 5;
     optional bytes  body    = 4;
 }