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307 lines
11 KiB
C#
307 lines
11 KiB
C#
//
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// SslSecurityTokenAuthenticator.cs
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//
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// Author:
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// Atsushi Enomoto <atsushi@ximian.com>
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//
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// Copyright (C) 2007 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.Collections.Generic;
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using System.Collections.ObjectModel;
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using System.IO;
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using System.Net.Security;
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using System.IdentityModel.Policy;
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using System.IdentityModel.Selectors;
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using System.IdentityModel.Tokens;
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using System.Security.Cryptography;
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using System.Security.Cryptography.X509Certificates;
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using System.Security.Cryptography.Xml;
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using System.ServiceModel.Channels;
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using System.ServiceModel.Description;
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using System.ServiceModel.Security;
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using System.ServiceModel.Security.Tokens;
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using System.Xml;
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using ReqType = System.ServiceModel.Security.Tokens.ServiceModelSecurityTokenRequirement;
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namespace System.ServiceModel.Security.Tokens
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{
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// FIXME: implement all
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class SslSecurityTokenAuthenticator : CommunicationSecurityTokenAuthenticator
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{
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ServiceCredentialsSecurityTokenManager manager;
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SslAuthenticatorCommunicationObject comm;
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bool mutual;
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public SslSecurityTokenAuthenticator (
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ServiceCredentialsSecurityTokenManager manager,
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SecurityTokenRequirement r)
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{
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this.manager = manager;
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mutual = (r.TokenType == ServiceModelSecurityTokenTypes.MutualSslnego);
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comm = new SslAuthenticatorCommunicationObject (this);
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}
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public bool IsMutual {
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get { return mutual; }
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}
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public ServiceCredentialsSecurityTokenManager Manager {
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get { return manager; }
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}
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public override AuthenticatorCommunicationObject Communication {
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get { return comm; }
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}
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protected override bool CanValidateTokenCore (SecurityToken token)
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{
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throw new NotImplementedException ();
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}
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protected override ReadOnlyCollection<IAuthorizationPolicy>
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ValidateTokenCore (SecurityToken token)
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{
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throw new NotImplementedException ();
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}
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}
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class SslAuthenticatorCommunicationObject : AuthenticatorCommunicationObject
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{
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SslSecurityTokenAuthenticator owner;
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public SslAuthenticatorCommunicationObject (SslSecurityTokenAuthenticator owner)
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{
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this.owner = owner;
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}
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WSTrustSecurityTokenServiceProxy proxy;
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protected internal override TimeSpan DefaultCloseTimeout {
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get { throw new NotImplementedException (); }
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}
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protected internal override TimeSpan DefaultOpenTimeout {
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get { throw new NotImplementedException (); }
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}
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public override Message ProcessNegotiation (Message request, TimeSpan timeout)
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{
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if (request.Headers.Action == Constants.WstIssueAction)
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return ProcessClientHello (request, timeout);
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else
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return ProcessClientKeyExchange (request, timeout);
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}
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class TlsServerSessionInfo
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{
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public TlsServerSessionInfo (string context, TlsServerSession tls)
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{
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ContextId = context;
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Tls = tls;
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}
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public string ContextId;
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public TlsServerSession Tls;
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public MemoryStream Messages = new MemoryStream ();
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}
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Dictionary<string,TlsServerSessionInfo> sessions =
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new Dictionary<string,TlsServerSessionInfo> ();
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void AppendNegotiationMessageXml (XmlReader reader, TlsServerSessionInfo tlsInfo)
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{
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XmlDsigExcC14NTransform t = new XmlDsigExcC14NTransform ();
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XmlDocument doc = new XmlDocument ();
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doc.PreserveWhitespace = true;
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reader.MoveToContent ();
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doc.AppendChild (doc.ReadNode (reader));
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t.LoadInput (doc);
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MemoryStream stream = (MemoryStream) t.GetOutput ();
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byte [] bytes = stream.ToArray ();
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tlsInfo.Messages.Write (bytes, 0, bytes.Length);
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}
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// FIXME: use timeout
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Message ProcessClientHello (Message request, TimeSpan timeout)
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{
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// FIXME: use correct buffer size
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MessageBuffer buffer = request.CreateBufferedCopy (0x10000);
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WSTrustRequestSecurityTokenReader reader =
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new WSTrustRequestSecurityTokenReader (buffer.CreateMessage ().GetReaderAtBodyContents (), SecurityTokenSerializer);
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reader.Read ();
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if (sessions.ContainsKey (reader.Value.Context))
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throw new SecurityNegotiationException (String.Format ("The context '{0}' already exists in this SSL negotiation manager", reader.Value.Context));
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// FIXME: it seems .NET retrieves X509 Certificate through CreateSecurityTokenProvider(somex509requirement).GetToken().SecurityKeys[0]
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// (should result in X509AsymmetricSecurityKey) and continues tlsstart.
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// That's not very required feature so I ignore it.
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TlsServerSession tls = new TlsServerSession (owner.Manager.ServiceCredentials.ServiceCertificate.Certificate, owner.IsMutual);
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TlsServerSessionInfo tlsInfo = new TlsServerSessionInfo (
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reader.Value.Context, tls);
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AppendNegotiationMessageXml (buffer.CreateMessage ().GetReaderAtBodyContents (), tlsInfo);
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tls.ProcessClientHello (reader.Value.BinaryExchange.Value);
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WstRequestSecurityTokenResponse rstr =
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new WstRequestSecurityTokenResponse (SecurityTokenSerializer);
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rstr.Context = reader.Value.Context;
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rstr.BinaryExchange = new WstBinaryExchange (Constants.WstBinaryExchangeValueTls);
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rstr.BinaryExchange.Value = tls.ProcessServerHello ();
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Message reply = Message.CreateMessage (request.Version, Constants.WstIssueReplyAction, rstr);
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reply.Headers.RelatesTo = request.Headers.MessageId;
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// FIXME: use correct buffer size
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buffer = reply.CreateBufferedCopy (0x10000);
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AppendNegotiationMessageXml (buffer.CreateMessage ().GetReaderAtBodyContents (), tlsInfo);
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sessions [reader.Value.Context] = tlsInfo;
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return buffer.CreateMessage ();
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}
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// FIXME: use timeout
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Message ProcessClientKeyExchange (Message request, TimeSpan timeout)
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{
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// FIXME: use correct buffer size
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MessageBuffer buffer = request.CreateBufferedCopy (0x10000);
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WSTrustRequestSecurityTokenResponseReader reader =
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new WSTrustRequestSecurityTokenResponseReader (Constants.WstTlsnegoProofTokenType, buffer.CreateMessage ().GetReaderAtBodyContents (), SecurityTokenSerializer, null);
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reader.Read ();
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TlsServerSessionInfo tlsInfo;
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if (!sessions.TryGetValue (reader.Value.Context, out tlsInfo))
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throw new SecurityNegotiationException (String.Format ("The context '{0}' does not exist in this SSL negotiation manager", reader.Value.Context));
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TlsServerSession tls = tlsInfo.Tls;
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AppendNegotiationMessageXml (buffer.CreateMessage ().GetReaderAtBodyContents (), tlsInfo);
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//Console.WriteLine (System.Text.Encoding.UTF8.GetString (tlsInfo.Messages.ToArray ()));
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tls.ProcessClientKeyExchange (reader.Value.BinaryExchange.Value);
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byte [] serverFinished = tls.ProcessServerFinished ();
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// The shared key is computed as recommended in WS-Trust:
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// P_SHA1(encrypted_key,SHA1(exc14n(RST..RSTRs))+"CK-HASH")
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byte [] hash = SHA1.Create ().ComputeHash (tlsInfo.Messages.ToArray ());
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byte [] key = tls.CreateHash (tls.MasterSecret, hash, "CK-HASH");
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byte [] keyTlsApplied = tls.ProcessApplicationData (key);
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foreach (byte b in hash) Console.Write ("{0:X02} ", b); Console.WriteLine ();
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foreach (byte b in key) Console.Write ("{0:X02} ", b); Console.WriteLine ();
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WstRequestSecurityTokenResponseCollection col =
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new WstRequestSecurityTokenResponseCollection ();
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WstRequestSecurityTokenResponse rstr =
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new WstRequestSecurityTokenResponse (SecurityTokenSerializer);
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rstr.Context = reader.Value.Context;
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rstr.TokenType = Constants.WsscContextToken;
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DateTime from = DateTime.Now;
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// FIXME: not sure if arbitrary key is used here.
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SecurityContextSecurityToken sct = SecurityContextSecurityToken.CreateCookieSecurityContextToken (
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// Create a new context.
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// (do not use sslnego context here.)
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new UniqueId (),
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"uuid-" + Guid.NewGuid (),
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key,
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from,
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// FIXME: use LocalServiceSecuritySettings.NegotiationTimeout
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from.AddHours (8),
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null,
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owner.Manager.ServiceCredentials.SecureConversationAuthentication.SecurityStateEncoder);
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rstr.RequestedSecurityToken = sct;
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// without this ProcessApplicationData(), .NET seems
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// to fail recovering the key.
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rstr.RequestedProofToken = keyTlsApplied;
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rstr.RequestedAttachedReference = new LocalIdKeyIdentifierClause (sct.Id);
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rstr.RequestedUnattachedReference = new SecurityContextKeyIdentifierClause (sct.ContextId, null);
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WstLifetime lt = new WstLifetime ();
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lt.Created = from;
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lt.Expires = from.Add (SecurityBindingElement.LocalServiceSettings.IssuedCookieLifetime);
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rstr.Lifetime = lt;
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rstr.BinaryExchange = new WstBinaryExchange (Constants.WstBinaryExchangeValueTls);
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rstr.BinaryExchange.Value = serverFinished;
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col.Responses.Add (rstr);
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// Authenticator is mandatory for MS sslnego.
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rstr = new WstRequestSecurityTokenResponse (SecurityTokenSerializer);
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rstr.Context = reader.Value.Context;
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rstr.Authenticator = tls.CreateHash (key, hash, "AUTH-HASH");
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col.Responses.Add (rstr);
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sessions.Remove (reader.Value.Context);
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// FIXME: get correct tokenRequestor address (probably identity authorized?)
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if (owner.IssuedSecurityTokenHandler != null)
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owner.IssuedSecurityTokenHandler (sct, request.Headers.ReplyTo);
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return Message.CreateMessage (request.Version, Constants.WstIssueReplyAction, col);
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}
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protected override void OnAbort ()
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{
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throw new NotImplementedException ();
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}
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protected override void OnOpen (TimeSpan timeout)
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{
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if (State == CommunicationState.Opened)
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throw new InvalidOperationException ("Already opened.");
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EnsureProperties ();
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proxy = new WSTrustSecurityTokenServiceProxy (
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IssuerBinding, IssuerAddress);
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}
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protected override IAsyncResult OnBeginOpen (TimeSpan timeout, AsyncCallback callback, object state)
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{
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throw new NotImplementedException ();
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}
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protected override void OnEndOpen (IAsyncResult result)
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{
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throw new NotImplementedException ();
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}
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protected override void OnClose (TimeSpan timeout)
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{
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if (proxy != null)
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proxy.Close ();
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}
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protected override IAsyncResult OnBeginClose (TimeSpan timeout, AsyncCallback callback, object state)
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{
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throw new NotImplementedException ();
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}
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protected override void OnEndClose (IAsyncResult result)
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{
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throw new NotImplementedException ();
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}
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}
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}
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