Make the Vault.generate() algorithm work in IE.

chrome/lib/vault.js

@@ -50,6 +50,22 @@ Vault.createHash = function(key, message, entropy) {
   return CJS.PBKDF2(key, message, {keySize: Math.ceil(digits / 8), iterations: 16}).toString();
 };
 
+Vault.indexOf = function(list, item) {
+  if (list.indexOf) return list.indexOf(item);
+  for (var i = 0, n = list.length; i < n; i++) {
+    if (list[i] === item) return i;
+  }
+  return -1;
+};
+
+Vault.map = function(list, callback, context) {
+  if (list.map) return list.map(callback, context);
+  var result = [];
+  for (var i = 0, n = list.length; i < n; i++)
+    result.push(callback.call(context, list[i]));
+  return result;
+};
+
 Vault.pbkdf2 = function(password, salt, keylen, iterations, callback) {
   if (typeof require === 'function' && require('crypto').pbkdf2)
     return require('crypto').pbkdf2(password, salt, iterations, 4 * keylen, function(error, key) {
@@ -72,7 +88,7 @@ Vault.prototype.subtract = function(charset, allowed) {
   if (!charset) return;
   allowed = allowed || this._allowed;
   for (var i = 0, n = charset.length; i < n; i++) {
-    var index = allowed.indexOf(charset[i]);
+    var index = Vault.indexOf(allowed, charset[i]);
     if (index >= 0) allowed.splice(index, 1);
   }
   return allowed;
@@ -97,7 +113,7 @@ Vault.prototype.generate = function(service) {
     throw new Error('Length too small to fit all required characters');
 
   var hex    = Vault.createHash(this._phrase, service + Vault.UUID, this.entropy()),
-      bits   = hex.split('').map(Vault.toBits).join(''),
+      bits   = Vault.map(hex.split(''), Vault.toBits).join(''),
       result = '',
       offset = 0,
       index, charset, previous, i, same, charbits, code;

lib/vault.js

@@ -50,6 +50,22 @@ Vault.createHash = function(key, message, entropy) {
   return CJS.PBKDF2(key, message, {keySize: Math.ceil(digits / 8), iterations: 16}).toString();
 };
 
+Vault.indexOf = function(list, item) {
+  if (list.indexOf) return list.indexOf(item);
+  for (var i = 0, n = list.length; i < n; i++) {
+    if (list[i] === item) return i;
+  }
+  return -1;
+};
+
+Vault.map = function(list, callback, context) {
+  if (list.map) return list.map(callback, context);
+  var result = [];
+  for (var i = 0, n = list.length; i < n; i++)
+    result.push(callback.call(context, list[i]));
+  return result;
+};
+
 Vault.pbkdf2 = function(password, salt, keylen, iterations, callback) {
   if (typeof require === 'function' && require('crypto').pbkdf2)
     return require('crypto').pbkdf2(password, salt, iterations, 4 * keylen, function(error, key) {
@@ -72,7 +88,7 @@ Vault.prototype.subtract = function(charset, allowed) {
   if (!charset) return;
   allowed = allowed || this._allowed;
   for (var i = 0, n = charset.length; i < n; i++) {
-    var index = allowed.indexOf(charset[i]);
+    var index = Vault.indexOf(allowed, charset[i]);
     if (index >= 0) allowed.splice(index, 1);
   }
   return allowed;
@@ -97,7 +113,7 @@ Vault.prototype.generate = function(service) {
     throw new Error('Length too small to fit all required characters');
 
   var hex    = Vault.createHash(this._phrase, service + Vault.UUID, this.entropy()),
-      bits   = hex.split('').map(Vault.toBits).join(''),
+      bits   = Vault.map(hex.split(''), Vault.toBits).join(''),
       result = '',
       offset = 0,
       index, charset, previous, i, same, charbits, code;