95 lines
3.1 KiB
C#
95 lines
3.1 KiB
C#
//
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// RSAPKCS1KeyExchangeFormatter.cs: Handles PKCS#1 v.1.5 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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// LAMESPEC: There seems no way to select a hash algorithm. The default
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// algorithm, is SHA1 because the class use the PKCS1MaskGenerationMethod -
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// which default to SHA1.
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[ComVisible (true)]
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public class RSAPKCS1KeyExchangeFormatter: AsymmetricKeyExchangeFormatter
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{
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private RSA rsa;
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private RandomNumberGenerator random;
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public RSAPKCS1KeyExchangeFormatter ()
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{
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}
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public RSAPKCS1KeyExchangeFormatter (AsymmetricAlgorithm key)
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{
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SetRSAKey (key);
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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 string Parameters {
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get { return "<enc:KeyEncryptionMethod enc:Algorithm=\"http://www.microsoft.com/xml/security/algorithm/PKCS1-v1.5-KeyEx\" xmlns:enc=\"http://www.microsoft.com/xml/security/encryption/v1.0\" />"; }
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}
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public override byte[] CreateKeyExchange (byte[] rgbData)
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{
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if (rgbData == null)
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throw new ArgumentNullException ("rgbData");
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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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if (random == null)
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random = RandomNumberGenerator.Create (); // create default
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return PKCS1.Encrypt_v15 (rsa, 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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private void SetRSAKey (AsymmetricAlgorithm key)
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{
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if (key == null)
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throw new ArgumentNullException ("key");
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rsa = (RSA) key;
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}
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public override void SetKey (AsymmetricAlgorithm key)
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{
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SetRSAKey (key);
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}
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}
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}
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