117 lines
4.2 KiB
C#
117 lines
4.2 KiB
C#
// Transport Security Layer (TLS)
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// Copyright (c) 2003-2004 Carlos Guzman Alvarez
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// Copyright (C) 2006 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;
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using System.IO;
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using System.Security.Cryptography;
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using System.Security.Cryptography.X509Certificates;
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namespace Mono.Security.Protocol.Tls.Handshake.Server
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{
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internal class TlsClientKeyExchange : HandshakeMessage
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{
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#region Constructors
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public TlsClientKeyExchange(Context context, byte[] buffer) :
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base(context,
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HandshakeType.ClientKeyExchange,
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buffer)
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{
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}
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#endregion
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#region Protected Methods
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protected override void ProcessAsSsl3()
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{
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AsymmetricAlgorithm privKey = null;
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ServerContext context = (ServerContext)this.Context;
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// Select the private key information
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privKey = context.SslStream.RaisePrivateKeySelection(
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new X509Certificate(context.ServerSettings.Certificates[0].RawData),
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null);
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if (privKey == null)
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{
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throw new TlsException(AlertDescription.UserCancelled, "Server certificate Private Key unavailable.");
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}
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// Read client premaster secret
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byte[] clientSecret = this.ReadBytes((int)this.Length);
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// Decrypt premaster secret
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RSAPKCS1KeyExchangeDeformatter deformatter = new RSAPKCS1KeyExchangeDeformatter(privKey);
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byte[] preMasterSecret = deformatter.DecryptKeyExchange(clientSecret);
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// Create master secret
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this.Context.Negotiating.Cipher.ComputeMasterSecret(preMasterSecret);
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// Create keys
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this.Context.Negotiating.Cipher.ComputeKeys ();
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// Initialize Cipher Suite
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this.Context.Negotiating.Cipher.InitializeCipher ();
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}
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protected override void ProcessAsTls1()
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{
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AsymmetricAlgorithm privKey = null;
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ServerContext context = (ServerContext)this.Context;
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// Select the private key information
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// Select the private key information
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privKey = context.SslStream.RaisePrivateKeySelection(
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new X509Certificate(context.ServerSettings.Certificates[0].RawData),
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null);
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if (privKey == null)
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{
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throw new TlsException(AlertDescription.UserCancelled, "Server certificate Private Key unavailable.");
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}
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// Read client premaster secret
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byte[] clientSecret = this.ReadBytes(this.ReadInt16());
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// Decrypt premaster secret
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RSAPKCS1KeyExchangeDeformatter deformatter = new RSAPKCS1KeyExchangeDeformatter(privKey);
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byte[] preMasterSecret = deformatter.DecryptKeyExchange(clientSecret);
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// Create master secret
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this.Context.Negotiating.Cipher.ComputeMasterSecret(preMasterSecret);
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// Create keys
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this.Context.Negotiating.Cipher.ComputeKeys();
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// Initialize Cipher Suite
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this.Context.Negotiating.Cipher.InitializeCipher();
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}
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#endregion
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}
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}
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