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

   1 /**\r
   2  * TLSPRF\r
   3  * \r
   4  * An ActionScript 3 implementation of a pseudo-random generator\r
   5  * that follows the TLS specification\r
   6  * Copyright (c) 2007 Henri Torgemane\r
   7  * \r
   8  * See LICENSE.txt for full license information.\r
   9  */\r
  10 package com.hurlant.crypto.prng\r
  11 {\r
  12         import flash.utils.ByteArray;\r
  13         import com.hurlant.crypto.hash.HMAC;\r
  14         import com.hurlant.crypto.hash.MD5;\r
  15         import com.hurlant.crypto.hash.SHA1;\r
  16         import com.hurlant.util.Memory;\r
  17         import com.hurlant.util.Hex;\r
  18         import flash.utils.IDataOutput;\r
  19 \r
  20         /**\r
  21          * There's "Random", and then there's TLS Random.\r
  22          * .\r
  23          * Still Pseudo-random, though.\r
  24          */\r
  25         public class TLSPRF\r
  26         {\r
  27                 // XXX WAY TOO MANY STRUCTURES HERE\r
  28                 \r
  29                 // seed\r
  30                 private var seed:ByteArray;\r
  31                 // P_MD5's secret\r
  32                 private var s1:ByteArray;\r
  33                 // P_SHA-1's secret\r
  34                 private var s2:ByteArray;\r
  35                 // HMAC_MD5's A\r
  36                 private var a1:ByteArray;\r
  37                 // HMAC_SHA1's A\r
  38                 private var a2:ByteArray;\r
  39                 // Pool for P_MD5\r
  40                 private var p1:ByteArray;\r
  41                 // Pool for P_SHA1\r
  42                 private var p2:ByteArray;\r
  43                 // Data for HMAC_MD5\r
  44                 private var d1:ByteArray;\r
  45                 // Data for HMAC_SHA1\r
  46                 private var d2:ByteArray;\r
  47                 \r
  48                 \r
  49                 private var hmac_md5:HMAC;\r
  50                 private var hmac_sha1:HMAC;\r
  51                 \r
  52                 public function TLSPRF(secret:ByteArray, label:String, seed:ByteArray) {\r
  53                         var l:int = Math.ceil(secret.length/2);\r
  54                         var s1:ByteArray = new ByteArray;\r
  55                         var s2:ByteArray = new ByteArray;\r
  56                         s1.writeBytes(secret, 0, l);\r
  57                         s2.writeBytes(secret, secret.length-l, l);\r
  58                         var s:ByteArray = new ByteArray;\r
  59                         s.writeUTFBytes(label);\r
  60                         s.writeBytes(seed);\r
  61                         this.seed = s;\r
  62                         this.s1 = s1;\r
  63                         this.s2 = s2;\r
  64                         hmac_md5 = new HMAC(new MD5);\r
  65                         hmac_sha1 = new HMAC(new SHA1);\r
  66                         \r
  67                         this.a1 = hmac_md5.compute(s1, this.seed);\r
  68                         this.a2 = hmac_sha1.compute(s2, this.seed);\r
  69                         \r
  70                         p1 = new ByteArray;\r
  71                         p2 = new ByteArray;\r
  72                         \r
  73                         d1 = new ByteArray;\r
  74                         d2 = new ByteArray;\r
  75                         d1.position = MD5.HASH_SIZE;\r
  76                         d1.writeBytes(this.seed);\r
  77                         d2.position = SHA1.HASH_SIZE;\r
  78                         d2.writeBytes(this.seed);\r
  79                 }\r
  80                 \r
  81                 // XXX HORRIBLY SLOW. REWRITE.\r
  82                 public function nextBytes(buffer:IDataOutput, length:int):void {\r
  83                         while (length--) {\r
  84                                 buffer.writeByte(nextByte());\r
  85                         }\r
  86                 }\r
  87                 public function nextByte():int {\r
  88                         if (p1.bytesAvailable==0) {\r
  89                                 more_md5();\r
  90                         }\r
  91                         if (p2.bytesAvailable==0) {\r
  92                                 more_sha1();\r
  93                         }\r
  94                         return p1.readUnsignedByte()^p2.readUnsignedByte();\r
  95                 }\r
  96                 public function dispose():void {\r
  97                         seed = dba(seed);\r
  98                         s1 = dba(s1);\r
  99                         s2 = dba(s2);\r
 100                         a1 = dba(a1);\r
 101                         a2 = dba(a2);\r
 102                         p1 = dba(p1);\r
 103                         p2 = dba(p2);\r
 104                         d1 = dba(d1);\r
 105                         d2 = dba(d2);\r
 106                         hmac_md5.dispose();\r
 107                         hmac_md5 = null;\r
 108                         hmac_sha1.dispose();\r
 109                         hmac_sha1 = null;\r
 110                         Memory.gc();\r
 111                 }\r
 112                 public function toString():String {\r
 113                         return "tls-prf";\r
 114                 }\r
 115                 private function dba(ba:ByteArray):ByteArray {\r
 116                         for (var i:uint=0;i<ba.length;i++) {\r
 117                                 ba[i]=0;\r
 118                         }\r
 119                         ba.length=0;\r
 120                         return null;\r
 121                 }\r
 122                 private function more_md5():void {\r
 123                         d1.position=0;\r
 124                         d1.writeBytes(a1);\r
 125                         var p:int = p1.position;\r
 126                         var more:ByteArray = hmac_md5.compute(s1, d1);\r
 127                         a1 = hmac_md5.compute(s1, a1);\r
 128                         p1.writeBytes(more);\r
 129                         p1.position=p;\r
 130                 }\r
 131                 private function more_sha1():void {\r
 132                         d2.position=0;\r
 133                         d2.writeBytes(a2);\r
 134                         var p:int = p2.position;\r
 135                         var more:ByteArray = hmac_sha1.compute(s2, d2);\r
 136                         a2 = hmac_sha1.compute(s2, a2);\r
 137                         p2.writeBytes(more);\r
 138                         p2.position=p;\r
 139                 }\r
 140                 \r
 141         }\r
 142 }