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

   1 /**\r
   2  * TripleDESKey\r
   3  * \r
   4  * An Actionscript 3 implementation of Triple DES\r
   5  * Copyright (c) 2007 Henri Torgemane\r
   6  * \r
   7  * Derived from:\r
   8  *              The Bouncy Castle Crypto package, \r
   9  *              Copyright (c) 2000-2004 The Legion Of The Bouncy Castle\r
  10  *              (http://www.bouncycastle.org)\r
  11  * \r
  12  * See LICENSE.txt for full license information.\r
  13  */\r
  14 package com.hurlant.crypto.symmetric\r
  15 {\r
  16         import flash.utils.ByteArray;\r
  17         import com.hurlant.util.Memory;\r
  18         import com.hurlant.util.Hex;\r
  19 \r
  20         public class TripleDESKey extends DESKey\r
  21         {\r
  22                 protected var encKey2:Array;\r
  23                 protected var encKey3:Array;\r
  24                 protected var decKey2:Array;\r
  25                 protected var decKey3:Array;\r
  26                 \r
  27                 /**\r
  28                  * This supports 2TDES and 3TDES.\r
  29                  * If the key passed is 128 bits, 2TDES is used.\r
  30                  * If the key has 192 bits, 3TDES is used.\r
  31                  * Other key lengths give "undefined" results.\r
  32                  */\r
  33                 public function TripleDESKey(key:ByteArray)\r
  34                 {\r
  35                         super(key);\r
  36                         encKey2 = generateWorkingKey(false, key, 8);\r
  37                         decKey2 = generateWorkingKey(true, key, 8);\r
  38                         if (key.length>16) {\r
  39                                 encKey3 = generateWorkingKey(true, key, 16);\r
  40                                 decKey3 = generateWorkingKey(false, key, 16);\r
  41                         } else {\r
  42                                 encKey3 = encKey;\r
  43                                 decKey3 = decKey;\r
  44                         }\r
  45                 }\r
  46 \r
  47                 public override function dispose():void\r
  48                 {\r
  49                         super.dispose();\r
  50                         var i:uint = 0;\r
  51                         if (encKey2!=null) {\r
  52                                 for (i=0;i<encKey2.length;i++) { encKey2[i]=0; }\r
  53                                 encKey2=null;\r
  54                         }\r
  55                         if (encKey3!=null) {\r
  56                                 for (i=0;i<encKey3.length;i++) { encKey3[i]=0; }\r
  57                                 encKey3=null;\r
  58                         }\r
  59                         if (decKey2!=null) {\r
  60                                 for (i=0;i<decKey2.length;i++) { decKey2[i]=0; }\r
  61                                 decKey2=null\r
  62                         }\r
  63                         if (decKey3!=null) {\r
  64                                 for (i=0;i<decKey3.length;i++) { decKey3[i]=0; }\r
  65                                 decKey3=null;\r
  66                         }\r
  67                         Memory.gc();\r
  68                 }\r
  69                 \r
  70                 public override function encrypt(block:ByteArray, index:uint=0):void\r
  71                 {\r
  72                         desFunc(encKey, block,index, block,index);\r
  73                         desFunc(encKey2, block,index, block,index);\r
  74                         desFunc(encKey3, block,index, block,index);\r
  75                 }\r
  76                 \r
  77                 public override function decrypt(block:ByteArray, index:uint=0):void\r
  78                 {\r
  79                         desFunc(decKey3, block, index, block, index);\r
  80                         desFunc(decKey2, block, index, block, index);\r
  81                         desFunc(decKey, block, index, block, index);\r
  82                 }\r
  83                 \r
  84                 public override function toString():String {\r
  85                         return "3des";\r
  86                 }\r
  87         }\r
  88 }