mcs/class/corlib/System.Security.Cryptography/RSAPKCS1KeyExchangeDeformatter.cs

   1 //
   2 // RSAPKCS1KeyExchangeDeformatter.cs - Handles PKCS#1 v.1.5 keyex decryption.
   3 //
   4 // Author:
   5 //      Sebastien Pouliot <sebastien@ximian.com>
   6 //
   7 // (C) 2002 Motus Technologies Inc. (http://www.motus.com)
   8 // (C) 2004 Novell (http://www.novell.com)
   9 //
  10
  11 //
  12 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  13 //
  14 // Permission is hereby granted, free of charge, to any person obtaining
  15 // a copy of this software and associated documentation files (the
  16 // "Software"), to deal in the Software without restriction, including
  17 // without limitation the rights to use, copy, modify, merge, publish,
  18 // distribute, sublicense, and/or sell copies of the Software, and to
  19 // permit persons to whom the Software is furnished to do so, subject to
  20 // the following conditions:
  21 //
  22 // The above copyright notice and this permission notice shall be
  23 // included in all copies or substantial portions of the Software.
  24 //
  25 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  29 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  30 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  31 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  32 //
  33
  34 using System;
  35 using System.Globalization;
  36 using Mono.Security.Cryptography;
  37
  38 namespace System.Security.Cryptography {
  39
  40         public class RSAPKCS1KeyExchangeDeformatter : AsymmetricKeyExchangeDeformatter {
  41
  42                 private RSA rsa;
  43                 private string param;
  44                 private RandomNumberGenerator random;
  45
  46                 public RSAPKCS1KeyExchangeDeformatter ()
  47                 {
  48                         rsa = null;
  49                 }
  50
  51                 public RSAPKCS1KeyExchangeDeformatter (AsymmetricAlgorithm key)
  52                 {
  53                         SetKey (key);
  54                 }
  55
  56                 public override string Parameters {
  57                         get { return null; }
  58                         set { ; }
  59                 }
  60
  61                 public RandomNumberGenerator RNG {
  62                         get { return random; }
  63                         set { random = value; }
  64                 }
  65
  66                 public override byte[] DecryptKeyExchange (byte[] rgbData)
  67                 {
  68                         if (rsa == null) {
  69                                 throw new CryptographicUnexpectedOperationException (
  70                                         Locale.GetText ("No key pair available."));
  71                         }
  72                         return PKCS1.Decrypt_v15 (rsa, rgbData);
  73                 }
  74
  75                 public override void SetKey (AsymmetricAlgorithm key)
  76                 {
  77                         rsa = (RSA)key;
  78                 }
  79         }
  80 }