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//
// RSAOAEPKeyExchangeFormatter.cs - Handles OAEP keyex encryption.
//
// Author:
// Sebastien Pouliot <sebastien@ximian.com>
//
// (C) 2002 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.Globalization;
using System.Runtime.InteropServices;
using Mono.Security.Cryptography;
namespace System.Security.Cryptography {
#if NET_2_0
[ComVisible (true)]
#endif
public class RSAOAEPKeyExchangeFormatter : AsymmetricKeyExchangeFormatter {
private RSA rsa;
private RandomNumberGenerator random;
private byte[] param;
public RSAOAEPKeyExchangeFormatter ()
{
rsa = null;
}
public RSAOAEPKeyExchangeFormatter (AsymmetricAlgorithm key)
{
SetKey (key);
}
public byte[] Parameter {
get { return param; }
set { param = value; }
}
public override string Parameters {
get { return null; }
}
public RandomNumberGenerator Rng {
get { return random; }
set { random = value; }
}
public override byte[] CreateKeyExchange (byte[] rgbData)
{
if (random == null)
random = RandomNumberGenerator.Create (); // create default
#if NET_2_0
if (rsa == null) {
string msg = Locale.GetText ("No RSA key specified");
throw new CryptographicUnexpectedOperationException (msg);
}
#endif
SHA1 sha1 = SHA1.Create ();
return PKCS1.Encrypt_OAEP (rsa, sha1, random, rgbData);
}
public override byte[] CreateKeyExchange (byte[] rgbData, Type symAlgType)
{
// documentation says that symAlgType is not used !?!
return CreateKeyExchange (rgbData);
}
public override void SetKey (AsymmetricAlgorithm key)
{
rsa = (RSA) key;
}
}
}
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