vnfmarket/src/main/webapp/vnfmarket/node_modules/socket.io-client/lib/vendor/web-socket-js/flash-src/com/hurlant/crypto/symmetric/CFB8Mode.as

   1 /**\r
   2  * CFB8Mode\r
   3  * \r
   4  * An ActionScript 3 implementation of the CFB-8 confidentiality mode\r
   5  * Copyright (c) 2007 Henri Torgemane\r
   6  * \r
   7  * See LICENSE.txt for full license information.\r
   8  */\r
   9 package com.hurlant.crypto.symmetric\r
  10 {\r
  11         import com.hurlant.crypto.tests.TestCase;\r
  12         import flash.utils.ByteArray;\r
  13 \r
  14         /**\r
  15          * \r
  16          * Note: The constructor accepts an optional padding argument, but ignores it otherwise.\r
  17          */\r
  18         public class CFB8Mode extends IVMode implements IMode\r
  19         {\r
  20                 public function CFB8Mode(key:ISymmetricKey, padding:IPad = null) {\r
  21                         super(key, null);\r
  22                 }\r
  23                 \r
  24                 public function encrypt(src:ByteArray):void {\r
  25                         var vector:ByteArray = getIV4e();\r
  26                         var tmp:ByteArray = new ByteArray;\r
  27                         for (var i:uint=0;i<src.length;i++) {\r
  28                                 tmp.position = 0;\r
  29                                 tmp.writeBytes(vector);\r
  30                                 key.encrypt(vector);\r
  31                                 src[i] ^= vector[0];\r
  32                                 // rotate\r
  33                                 for (var j:uint=0;j<blockSize-1;j++) {\r
  34                                         vector[j] = tmp[j+1];\r
  35                                 }\r
  36                                 vector[blockSize-1] = src[i];\r
  37                         }\r
  38                 }\r
  39                 \r
  40                 public function decrypt(src:ByteArray):void {\r
  41                         var vector:ByteArray = getIV4d();\r
  42                         var tmp:ByteArray = new ByteArray;\r
  43                         for (var i:uint=0;i<src.length;i++) {\r
  44                                 var c:uint = src[i];\r
  45                                 tmp.position = 0;\r
  46                                 tmp.writeBytes(vector); // I <- tmp\r
  47                                 key.encrypt(vector);    // O <- vector\r
  48                                 src[i] ^= vector[0];\r
  49                                 // rotate\r
  50                                 for (var j:uint=0;j<blockSize-1;j++) {\r
  51                                         vector[j] = tmp[j+1];\r
  52                                 }\r
  53                                 vector[blockSize-1] = c;\r
  54                         }\r
  55 \r
  56                 }\r
  57                 public function toString():String {\r
  58                         return key.toString()+"-cfb8";\r
  59                 }\r
  60         }\r
  61 }