2 // PKCS1MaskGenerationMethod.cs: Handles PKCS#1 mask generation.
5 // Sebastien Pouliot (spouliot@motus.com)
7 // (C) 2002, 2003 Motus Technologies Inc. (http://www.motus.com)
11 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
13 // Permission is hereby granted, free of charge, to any person obtaining
14 // a copy of this software and associated documentation files (the
15 // "Software"), to deal in the Software without restriction, including
16 // without limitation the rights to use, copy, modify, merge, publish,
17 // distribute, sublicense, and/or sell copies of the Software, and to
18 // permit persons to whom the Software is furnished to do so, subject to
19 // the following conditions:
21 // The above copyright notice and this permission notice shall be
22 // included in all copies or substantial portions of the Software.
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26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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34 using Mono
.Security
.Cryptography
;
36 namespace System
.Security
.Cryptography
{
39 // a. PKCS#1: RSA Cryptography Standard
40 // http://www.rsasecurity.com/rsalabs/pkcs/pkcs-1/index.html
42 public class PKCS1MaskGenerationMethod
: MaskGenerationMethod
{
44 private string hashName
;
46 public PKCS1MaskGenerationMethod ()
51 public string HashName
53 get { return hashName; }
54 set { hashName = ((value == null) ? "SHA1" : value); }
57 // This method is not compatible with the one provided by MS in
58 // framework 1.0 and 1.1 but IS compliant with PKCS#1 v.2.1 and
59 // work for implementing OAEP
60 public override byte[] GenerateMask (byte[] mgfSeed
, int maskLen
)
62 HashAlgorithm hash
= HashAlgorithm
.Create (hashName
);
63 return PKCS1
.MGF1 (hash
, mgfSeed
, maskLen
);