mcs/class/corlib/System.Security.Cryptography/RSAPKCS1SignatureFormatter.cs

   1 //
   2 // RSAPKCS1SignatureFormatter.cs - Handles PKCS#1 v.1.5 signature encryption.
   3 //
   4 // Author:
   5 //      Sebastien Pouliot <sebastien@ximian.com>
   6 //
   7 // (C) 2002, 2003 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 Mono.Security.Cryptography;
  36
  37 namespace System.Security.Cryptography {
  38
  39         public class RSAPKCS1SignatureFormatter : AsymmetricSignatureFormatter {
  40
  41                 private RSA rsa;
  42                 private HashAlgorithm hash;
  43
  44                 public RSAPKCS1SignatureFormatter ()
  45                 {
  46                 }
  47
  48                 public RSAPKCS1SignatureFormatter (AsymmetricAlgorithm key)
  49                 {
  50                         SetKey (key);
  51                 }
  52
  53                 public override byte[] CreateSignature (byte[] rgbHash)
  54                 {
  55                         if (rsa == null) {
  56                                 throw new CryptographicUnexpectedOperationException (
  57                                         Locale.GetText ("No key pair available."));
  58                         }
  59                         if (hash == null) {
  60                                 throw new CryptographicUnexpectedOperationException (
  61                                         Locale.GetText ("Missing hash algorithm."));
  62                         }
  63                         if (rgbHash == null)
  64                                 throw new ArgumentNullException ("rgbHash");
  65
  66                         return PKCS1.Sign_v15 (rsa, hash, rgbHash);
  67                 }
  68
  69                 public override void SetHashAlgorithm (string strName)
  70                 {
  71                         hash = HashAlgorithm.Create (strName);
  72                 }
  73
  74                 public override void SetKey (AsymmetricAlgorithm key)
  75                 {
  76                         rsa = (RSA) key;
  77                 }
  78         }
  79 }