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

   1 /**\r
   2  * ECBMode\r
   3  * \r
   4  * An ActionScript 3 implementation of the ECB 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 flash.utils.ByteArray;\r
  12         import com.hurlant.util.Memory;\r
  13         import com.hurlant.util.Hex;\r
  14         \r
  15         /**\r
  16          * ECB mode.\r
  17          * This uses a padding and a symmetric key.\r
  18          * If no padding is given, PKCS#5 is used.\r
  19          */\r
  20         public class ECBMode implements IMode, ICipher\r
  21         {\r
  22                 private var key:ISymmetricKey;\r
  23                 private var padding:IPad;\r
  24                 \r
  25                 public function ECBMode(key:ISymmetricKey, padding:IPad = null) {\r
  26                         this.key = key;\r
  27                         if (padding == null) {\r
  28                                 padding = new PKCS5(key.getBlockSize());\r
  29                         } else {\r
  30                                 padding.setBlockSize(key.getBlockSize());\r
  31                         }\r
  32                         this.padding = padding;\r
  33                 }\r
  34                 \r
  35                 public function getBlockSize():uint {\r
  36                         return key.getBlockSize();\r
  37                 }\r
  38                 \r
  39                 public function encrypt(src:ByteArray):void {\r
  40                         padding.pad(src);\r
  41                         src.position = 0;\r
  42                         var blockSize:uint = key.getBlockSize();\r
  43                         var tmp:ByteArray = new ByteArray;\r
  44                         var dst:ByteArray = new ByteArray;\r
  45                         for (var i:uint=0;i<src.length;i+=blockSize) {\r
  46                                 tmp.length=0;\r
  47                                 src.readBytes(tmp, 0, blockSize);\r
  48                                 key.encrypt(tmp);\r
  49                                 dst.writeBytes(tmp);\r
  50                         }\r
  51                         src.length=0;\r
  52                         src.writeBytes(dst);\r
  53                 }\r
  54                 public function decrypt(src:ByteArray):void {\r
  55                         src.position = 0;\r
  56                         var blockSize:uint = key.getBlockSize();\r
  57                         \r
  58                         // sanity check.\r
  59                         if (src.length%blockSize!=0) {\r
  60                                 throw new Error("ECB mode cipher length must be a multiple of blocksize "+blockSize);\r
  61                         }\r
  62                         \r
  63                         var tmp:ByteArray = new ByteArray;\r
  64                         var dst:ByteArray = new ByteArray;\r
  65                         for (var i:uint=0;i<src.length;i+=blockSize) {\r
  66                                 tmp.length=0;\r
  67                                 src.readBytes(tmp, 0, blockSize);\r
  68                                 \r
  69                                 key.decrypt(tmp);\r
  70                                 dst.writeBytes(tmp);\r
  71                         }\r
  72                         padding.unpad(dst);\r
  73                         src.length=0;\r
  74                         src.writeBytes(dst);\r
  75                 }\r
  76                 public function dispose():void {\r
  77                         key.dispose();\r
  78                         key = null;\r
  79                         padding = null;\r
  80                         Memory.gc();\r
  81                 }\r
  82                 public function toString():String {\r
  83                         return key.toString()+"-ecb";\r
  84                 }\r
  85         }\r
  86 }