91 lines
2.7 KiB
C#
91 lines
2.7 KiB
C#
//
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// RSAOAEPKeyExchangeFormatter.cs - Handles OAEP keyex encryption.
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//
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// Author:
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// Sebastien Pouliot <sebastien@ximian.com>
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//
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// (C) 2002 Motus Technologies Inc. (http://www.motus.com)
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// Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System.Globalization;
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using System.Runtime.InteropServices;
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using Mono.Security.Cryptography;
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namespace System.Security.Cryptography {
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[ComVisible (true)]
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public class RSAOAEPKeyExchangeFormatter : AsymmetricKeyExchangeFormatter {
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private RSA rsa;
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private RandomNumberGenerator random;
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private byte[] param;
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public RSAOAEPKeyExchangeFormatter ()
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{
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rsa = null;
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}
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public RSAOAEPKeyExchangeFormatter (AsymmetricAlgorithm key)
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{
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SetKey (key);
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}
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public byte[] Parameter {
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get { return param; }
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set { param = value; }
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}
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public override string Parameters {
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get { return null; }
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}
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public RandomNumberGenerator Rng {
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get { return random; }
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set { random = value; }
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}
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public override byte[] CreateKeyExchange (byte[] rgbData)
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{
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if (random == null)
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random = RandomNumberGenerator.Create (); // create default
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if (rsa == null) {
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string msg = Locale.GetText ("No RSA key specified");
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throw new CryptographicUnexpectedOperationException (msg);
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}
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SHA1 sha1 = SHA1.Create ();
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return PKCS1.Encrypt_OAEP (rsa, sha1, random, rgbData);
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}
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public override byte[] CreateKeyExchange (byte[] rgbData, Type symAlgType)
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{
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// documentation says that symAlgType is not used !?!
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return CreateKeyExchange (rgbData);
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}
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public override void SetKey (AsymmetricAlgorithm key)
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{
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rsa = (RSA) key;
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}
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}
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}
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