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//
// RSAOAEPKeyExchangeDeformatter.cs - Handles OAEP keyex decryption.
//
// Author:
// Sebastien Pouliot <sebastien@ximian.com>
//
// (C) 2002 Motus Technologies Inc. (http://www.motus.com)
// Copyright (C) 2004-2006 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.Globalization;
using System.Runtime.InteropServices;
using Mono.Security.Cryptography;
namespace System.Security.Cryptography {
#if NET_2_0
[ComVisible (true)]
#endif
public class RSAOAEPKeyExchangeDeformatter : AsymmetricKeyExchangeDeformatter {
private RSA rsa;
// private string param;
public RSAOAEPKeyExchangeDeformatter ()
{
}
public RSAOAEPKeyExchangeDeformatter (AsymmetricAlgorithm key)
{
SetKey (key);
}
public override string Parameters {
get { return null; }
set { ; }
}
public override byte[] DecryptKeyExchange (byte[] rgbData)
{
#if NET_2_0
if (rsa == null) {
string msg = Locale.GetText ("No RSA key specified");
throw new CryptographicUnexpectedOperationException (msg);
}
#endif
SHA1 sha1 = SHA1.Create ();
byte[] result = PKCS1.Decrypt_OAEP (rsa, sha1, rgbData);
if (result != null)
return result;
throw new CryptographicException (Locale.GetText ("OAEP decoding error."));
}
public override void SetKey (AsymmetricAlgorithm key)
{
rsa = (RSA)key;
}
}
}
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