mcs/class/Mono.Security/Mono.Security.Protocol.Tls/RSASslSignatureDeformatter.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 namespace Mono.Security.Protocol.Tls
  50 {
  51         internal class RSASslSignatureDeformatter : AsymmetricSignatureDeformatter
  52         {
  53                 #region Fields
  54
  55                 private RSA                             key;
  56                 private HashAlgorithm   hash;
  57
  58                 #endregion
  59
  60                 #region Constructors
  61
  62                 public RSASslSignatureDeformatter()
  63                 {
  64                 }
  65
  66                 public RSASslSignatureDeformatter(AsymmetricAlgorithm key)
  67                 {
  68                         this.SetKey(key);
  69                 }
  70
  71                 #endregion
  72
  73                 #region Methods
  74
  75                 public override bool VerifySignature(
  76                         byte[] rgbHash,
  77                         byte[] rgbSignature)
  78                 {
  79                         if (this.key == null)
  80                         {
  81                                 throw new CryptographicUnexpectedOperationException("The key is a null reference");
  82                         }
  83                         if (hash == null)
  84                         {
  85                                 throw new CryptographicUnexpectedOperationException("The hash algorithm is a null reference.");
  86                         }
  87                         if (rgbHash == null)
  88                         {
  89                                 throw new ArgumentNullException("The rgbHash parameter is a null reference.");
  90                         }
  91
  92                         return Mono.Security.Cryptography.PKCS1.Verify_v15(
  93                                 this.key,
  94                                 this.hash,
  95                                 rgbHash,
  96                                 rgbSignature);
  97                 }
  98
  99                 public override void SetHashAlgorithm(string strName)
 100                 {
 101                         switch (strName)
 102                         {
 103                                 case "MD5SHA1":
 104                                         this.hash = new Mono.Security.Cryptography.MD5SHA1();
 105                                         break;
 106
 107                                 default:
 108                                         this.hash = HashAlgorithm.Create(strName);
 109                                         break;
 110                         }
 111                 }
 112
 113                 public override void SetKey(AsymmetricAlgorithm key)
 114                 {
 115                         if (!(key is RSA))
 116                         {
 117                                 throw new ArgumentException("Specfied key is not an RSA key");
 118                         }
 119
 120                         this.key = key as RSA;
 121                 }
 122
 123                 #endregion
 124         }
 125 }