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[mono.git] / 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 }