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//
// PKCS1MaskGenerationMethod.cs: Handles PKCS#1 mask generation.
//
// Author:
// Sebastien Pouliot (sebastien@ximian.com)
//
// (C) 2002, 2003 Motus Technologies Inc. (http://www.motus.com)
// Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System.Runtime.InteropServices;
using Mono.Security.Cryptography;
namespace System.Security.Cryptography {
// References:
// a. PKCS#1: RSA Cryptography Standard
// http://www.rsasecurity.com/rsalabs/pkcs/pkcs-1/index.html
[ComVisible (true)]
public class PKCS1MaskGenerationMethod : MaskGenerationMethod {
private string hashName;
public PKCS1MaskGenerationMethod ()
{
hashName = "SHA1";
}
public string HashName
{
get { return hashName; }
set { hashName = ((value == null) ? "SHA1" : value); }
}
// This method is not compatible with the one provided by MS in
// framework 1.0 and 1.1 but IS compliant with PKCS#1 v.2.1 and
// work for implementing OAEP
public override byte[] GenerateMask (byte[] rgbSeed, int cbReturn)
{
HashAlgorithm hash = HashAlgorithm.Create (hashName);
return PKCS1.MGF1 (hash, rgbSeed, cbReturn);
}
}
}
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