rsapkcs1keyexchangedeformatter.cs

本源码为OpenNETCF源代码

//==========================================================================================
//
//		OpenNETCF.Windows.Forms.RSAPKCS1KeyExchangeDeformatter
//		Copyright (c) 2003, OpenNETCF.org
//
//		This library is free software; you can redistribute it and/or modify it under 
//		the terms of the OpenNETCF.org Shared Source License.
//
//		This library is distributed in the hope that it will be useful, but 
//		WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 
//		FITNESS FOR A PARTICULAR PURPOSE. See the OpenNETCF.org Shared Source License 
//		for more details.
//
//		You should have received a copy of the OpenNETCF.org Shared Source License 
//		along with this library; if not, email [e-mail] to request a copy.
//
//		If you wish to contact the OpenNETCF Advisory Board to discuss licensing, please 
//		email [e-mail].
//
//		For general enquiries, email [e-mail] or visit our website at:
//		http://www.opennetcf.org
//
//		!!! A HUGE thank-you goes out to Casey Chesnut for supplying this class library !!!
//      !!! You can contact Casey at http://www.brains-n-brawn.com                      !!!
//
//==========================================================================================
using System;

namespace OpenNETCF.Security.Cryptography 
{ 
	public class RSAPKCS1KeyExchangeDeformatter : AsymmetricKeyExchangeDeformatter 
	{
	
		private RSA rsa;
		private string param;
		private RandomNumberGenerator random;
	
		public RSAPKCS1KeyExchangeDeformatter () 
		{
			rsa = null;
		}
	
		public RSAPKCS1KeyExchangeDeformatter (AsymmetricAlgorithm key) 
		{
			SetKey (key);
		}
	
		public override string Parameters 
		{
			get { return param; }
			set { param = value; }
		}
	
		public RandomNumberGenerator RNG 
		{
			get { return random; }
			set { random = value; }
		}
	
		public override byte[] DecryptKeyExchange (byte[] rgbData) 
		{
			if (rsa == null)
				throw new CryptographicException ();
			return rsa.DecryptValue(rgbData);
		}
	
		public override void SetKey (AsymmetricAlgorithm key) 
		{
			if (key is RSA) {
				rsa = (RSA)key;
			}
			else
				throw new CryptographicException ();
		}
	}
}