mcs/class/Mono.Security/Mono.Security.Cryptography/MD5SHA1.cs

   1
   2 //
   3 // Permission is hereby granted, free of charge, to any person obtaining
   4 // a copy of this software and associated documentation files (the
   5 // "Software"), to deal in the Software without restriction, including
   6 // without limitation the rights to use, copy, modify, merge, publish,
   7 // distribute, sublicense, and/or sell copies of the Software, and to
   8 // permit persons to whom the Software is furnished to do so, subject to
   9 // the following conditions:
  10 //
  11 // The above copyright notice and this permission notice shall be
  12 // included in all copies or substantial portions of the Software.
  13 //
  14 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  15 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  16 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  17 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  18 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  19 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  20 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  21 //
  22 /* Transport Security Layer (TLS)
  23  * Copyright (c) 2003-2004 Carlos Guzman Alvarez
  24  *
  25  * Permission is hereby granted, free of charge, to any person
  26  * obtaining a copy of this software and associated documentation
  27  * files (the "Software"), to deal in the Software without restriction,
  28  * including without limitation the rights to use, copy, modify, merge,
  29  * publish, distribute, sublicense, and/or sell copies of the Software,
  30  * and to permit persons to whom the Software is furnished to do so,
  31  * subject to the following conditions:
  32  *
  33  * The above copyright notice and this permission notice shall be included
  34  * in all copies or substantial portions of the Software.
  35  *
  36  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  37  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
  38  * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  39  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  40  * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  41  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  42  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  43  * DEALINGS IN THE SOFTWARE.
  44  */
  45
  46 using System;
  47 using System.Security.Cryptography;
  48
  49 using Mono.Security.Protocol.Tls;
  50
  51 namespace Mono.Security.Cryptography
  52 {
  53         internal class MD5SHA1 : HashAlgorithm
  54         {
  55                 #region Fields
  56
  57                 private HashAlgorithm   md5;
  58                 private HashAlgorithm   sha;
  59                 private bool                    hashing;
  60
  61                 #endregion
  62
  63                 #region Constructors
  64
  65                 public MD5SHA1() : base()
  66                 {
  67                         this.md5 = MD5.Create();
  68                         this.sha = SHA1.Create();
  69
  70                         // Set HashSizeValue
  71                         this.HashSizeValue = this.md5.HashSize + this.sha.HashSize;
  72                 }
  73
  74                 #endregion
  75
  76                 #region Methods
  77
  78                 public override void Initialize()
  79                 {
  80                         this.md5.Initialize();
  81                         this.sha.Initialize();
  82                         this.hashing = false;
  83                 }
  84
  85                 protected override byte[] HashFinal()
  86                 {
  87                         if (!hashing)
  88                         {
  89                                 this.hashing = true;
  90                         }
  91                         // Finalize the original hash
  92                         this.md5.TransformFinalBlock(new byte[0], 0, 0);
  93                         this.sha.TransformFinalBlock(new byte[0], 0, 0);
  94
  95                         byte[] hash = new byte[36];
  96
  97                         Buffer.BlockCopy(this.md5.Hash, 0, hash, 0, 16);
  98                         Buffer.BlockCopy(this.sha.Hash, 0, hash, 16, 20);
  99
 100                         return hash;
 101                 }
 102
 103                 protected override void HashCore(
 104                         byte[] array,
 105                         int ibStart,
 106                         int cbSize)
 107                 {
 108                         if (!hashing)
 109                         {
 110                                 hashing = true;
 111                         }
 112                         this.md5.TransformBlock(array, ibStart, cbSize, array, ibStart);
 113                         this.sha.TransformBlock(array, ibStart, cbSize, array, ibStart);
 114                 }
 115
 116                 public byte[] CreateSignature(RSA rsa)
 117                 {
 118                         if (rsa == null)
 119                         {
 120                                 throw new CryptographicUnexpectedOperationException ("missing key");
 121                         }
 122
 123                         RSASslSignatureFormatter f = new RSASslSignatureFormatter(rsa);
 124                         f.SetHashAlgorithm("MD5SHA1");
 125
 126                         return f.CreateSignature(this.Hash);
 127                 }
 128
 129                 public bool VerifySignature(RSA rsa, byte[] rgbSignature)
 130                 {
 131                         if (rsa == null)
 132                         {
 133                                 throw new CryptographicUnexpectedOperationException ("missing key");
 134                         }
 135                         if (rgbSignature == null)
 136                         {
 137                                 throw new ArgumentNullException ("rgbSignature");
 138                         }
 139
 140                         RSASslSignatureDeformatter d = new RSASslSignatureDeformatter(rsa);
 141                         d.SetHashAlgorithm("MD5SHA1");
 142
 143                         return d.VerifySignature(this.Hash, rgbSignature);
 144                 }
 145
 146                 #endregion
 147         }
 148 }