allow registering using a mnemonic word list (seed used as privKey for now)

Gruntfile.js

@@ -89,6 +89,7 @@ module.exports = grunt => {
       libloki: {
         src: [
           'libloki/libloki-protocol.js',
+          'libloki/mnemonic.js',
         ],
         dest: 'js/libloki.js',
       },

background.html

@@ -568,6 +568,15 @@
       <div class='inner'>
         <div class='step-body'>
           <div class='header'>Create your Loki Messenger Account</div>
+
+          <input class='form-control' type='text' id='mnemonic' placeholder='Mnemonic' autocomplete='off' spellcheck='false'>
+          
+          <div class='clearfix'>
+            <a class='button' id='register-mnemonic'>Register using mnenomic</a>
+          </div>
+          <div id='error' class='collapse'></div>
+          <div id=status></div>
+
         </div>
         <div class='nav'>
           <a class='button' id='register' data-loading-text='Please wait...'>Register</a>

js/views/standalone_registration_view.js

@@ -31,15 +31,28 @@
       'click #request-sms': 'requestSMSVerification',
       'change #code': 'onChangeCode',
       'click #register': 'register',
+      'click #register-mnemonic': 'registerWithMnemonic',
+      'change #mnemonic': 'onChangeMnemonic',
     },
     register() {
       this.accountManager
-        .registerSingleDevice()
+        .registerSingleDevice(this.$('#mnemonic').val())
         .then(() => {
           this.$el.trigger('openInbox');
         })
         .catch(this.log.bind(this));
     },
+    registerWithMnemonic() {
+      const words = this.$('#mnemonic').val();
+      if (!words) {
+        log('Please provide a mnemonic word list');
+      } else {
+        this.register();
+      }
+    },
+    onChangeMnemonic() {
+      this.$('#status').html('');
+    },
     log(s) {
       window.log.info(s);
       this.$('#status').text(s);

libtextsecure/account_manager.js

@@ -44,14 +44,25 @@
     requestSMSVerification(number) {
       return this.server.requestVerificationSMS(number);
     },
-    registerSingleDevice() {
+    registerSingleDevice(mnemonic) {
       const createAccount = this.createAccount.bind(this);
       const clearSessionsAndPreKeys = this.clearSessionsAndPreKeys.bind(this);
       const generateKeys = this.generateKeys.bind(this, 0);
       const confirmKeys = this.confirmKeys.bind(this);
       const registrationDone = this.registrationDone.bind(this);
+      let generateKeypair;
+      if (mnemonic) {
+        generateKeypair = () => {
+          const seedHex = window.mnemonic.decode(mnemonic);
+          // use seed as privkey?
+          const privKey = dcodeIO.ByteBuffer.wrap(seedHex, 'hex').toArrayBuffer();
+          return libsignal.Curve.async.createKeyPair(privKey);
+        };
+      } else {
+        generateKeypair = libsignal.KeyHelper.generateIdentityKeyPair;
+      }
       return this.queueTask(() => 
-        libsignal.KeyHelper.generateIdentityKeyPair().then(identityKeyPair => {
+        generateKeypair().then(identityKeyPair => {
           return createAccount(
             identityKeyPair,
           )

preload.js

@@ -206,6 +206,8 @@ window.LokiAPI = initializeLokiAPI({
   url: config.serverUrl,
 });
 
+window.crc32 = require('buffer-crc32');
+
 // Linux seems to periodically let the event loop stop, so this is a global workaround
 setInterval(() => {
   window.nodeSetImmediate(() => {});