Authenticator的不再依赖crypto_utils

@@ -8,13 +8,12 @@ const Authenticator = function (secret, options) {
   }
 
   const _ = require('lodash'),
-    crypto_utils = require('kml-crypto-utils'),
     speakeasy = require('speakeasy'),
     qr = require('qr-image');
 
   options = options || {};
 
-  this.secret = crypto_utils.AESDecode(secret);
+  this.secret = secret;
 
   const TOTP_OPTIONS = this.totp_options = {
     secret: this.secret,

@@ -34,7 +34,7 @@ const TOTP = function (options) {
    * @return {Authenticator}
    */
   this.parse = function (secret) {
-    return new Authenticator(secret, TOTP_OPTIONS)
+    return new Authenticator(crypto_utils.AESDecode(secret), TOTP_OPTIONS)
   };
 
   return this;