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//----------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.ServiceModel.Security
{
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.IdentityModel.Policy;
using System.IdentityModel.Selectors;
using System.IdentityModel.Tokens;
using System.Runtime;
using System.ServiceModel;
using System.ServiceModel.Channels;
using System.ServiceModel.Security.Tokens;
sealed class InitiatorSessionSymmetricMessageSecurityProtocol : MessageSecurityProtocol, IInitiatorSecuritySessionProtocol
{
SecurityToken outgoingSessionToken;
SecurityTokenAuthenticator sessionTokenAuthenticator;
List<SecurityToken> incomingSessionTokens;
DerivedKeySecurityToken derivedSignatureToken;
DerivedKeySecurityToken derivedEncryptionToken;
SecurityStandardsManager sessionStandardsManager;
bool requireDerivedKeys;
Object thisLock = new Object();
bool returnCorrelationState = false;
public InitiatorSessionSymmetricMessageSecurityProtocol(SessionSymmetricMessageSecurityProtocolFactory factory,
EndpointAddress target, Uri via)
: base(factory, target, via)
{
if (factory.ActAsInitiator != true)
{
Fx.Assert("This protocol can only be used at the initiator.");
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new NotSupportedException(SR.GetString(SR.ProtocolMustBeInitiator, "InitiatorSessionSymmetricMessageSecurityProtocol")));
}
this.requireDerivedKeys = factory.SecurityTokenParameters.RequireDerivedKeys;
if (requireDerivedKeys)
{
SecurityTokenSerializer innerTokenSerializer = this.Factory.StandardsManager.SecurityTokenSerializer;
WSSecureConversation secureConversation = (innerTokenSerializer is WSSecurityTokenSerializer) ? ((WSSecurityTokenSerializer)innerTokenSerializer).SecureConversation : new WSSecurityTokenSerializer(this.Factory.MessageSecurityVersion.SecurityVersion).SecureConversation;
this.sessionStandardsManager = new SecurityStandardsManager(factory.MessageSecurityVersion, new DerivedKeyCachingSecurityTokenSerializer(2, true, secureConversation, innerTokenSerializer));
}
}
Object ThisLock
{
get
{
return thisLock;
}
}
protected override bool PerformIncomingAndOutgoingMessageExpectationChecks
{
get { return false; }
}
public bool ReturnCorrelationState
{
get
{
return this.returnCorrelationState;
}
set
{
this.returnCorrelationState = value;
}
}
SessionSymmetricMessageSecurityProtocolFactory Factory
{
get { return (SessionSymmetricMessageSecurityProtocolFactory)base.MessageSecurityProtocolFactory; }
}
public SecurityToken GetOutgoingSessionToken()
{
lock (ThisLock)
{
return this.outgoingSessionToken;
}
}
public void SetIdentityCheckAuthenticator(SecurityTokenAuthenticator authenticator)
{
this.sessionTokenAuthenticator = authenticator;
}
public void SetOutgoingSessionToken(SecurityToken token)
{
if (token == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("token");
}
lock (ThisLock)
{
this.outgoingSessionToken = token;
if (this.requireDerivedKeys)
{
string derivationAlgorithm = SecurityUtils.GetKeyDerivationAlgorithm(this.sessionStandardsManager.MessageSecurityVersion.SecureConversationVersion);
this.derivedSignatureToken = new DerivedKeySecurityToken(-1, 0,
this.Factory.OutgoingAlgorithmSuite.GetSignatureKeyDerivationLength(token, this.sessionStandardsManager.MessageSecurityVersion.SecureConversationVersion), null,
DerivedKeySecurityToken.DefaultNonceLength, token, this.Factory.SecurityTokenParameters.CreateKeyIdentifierClause(token, SecurityTokenReferenceStyle.Internal), derivationAlgorithm, SecurityUtils.GenerateId());
this.derivedEncryptionToken = new DerivedKeySecurityToken(-1, 0,
this.Factory.OutgoingAlgorithmSuite.GetEncryptionKeyDerivationLength(token, this.sessionStandardsManager.MessageSecurityVersion.SecureConversationVersion),
null, DerivedKeySecurityToken.DefaultNonceLength, token, this.Factory.SecurityTokenParameters.CreateKeyIdentifierClause(token, SecurityTokenReferenceStyle.Internal), derivationAlgorithm, SecurityUtils.GenerateId());
}
}
}
public List<SecurityToken> GetIncomingSessionTokens()
{
lock (ThisLock)
{
return this.incomingSessionTokens;
}
}
public void SetIncomingSessionTokens(List<SecurityToken> tokens)
{
if (tokens == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("tokens");
}
lock (ThisLock)
{
this.incomingSessionTokens = new List<SecurityToken>(tokens);
}
}
void GetTokensForOutgoingMessages(out SecurityToken signingToken, out SecurityToken encryptionToken, out SecurityToken sourceToken, out SecurityTokenParameters tokenParameters)
{
lock (ThisLock)
{
if (this.requireDerivedKeys)
{
signingToken = this.derivedSignatureToken;
encryptionToken = this.derivedEncryptionToken;
sourceToken = this.outgoingSessionToken;
}
else
{
signingToken = encryptionToken = this.outgoingSessionToken;
sourceToken = null;
}
}
if (this.Factory.ApplyConfidentiality)
{
EnsureOutgoingIdentity(sourceToken ?? encryptionToken, this.sessionTokenAuthenticator);
}
tokenParameters = this.Factory.GetTokenParameters();
}
protected override IAsyncResult BeginSecureOutgoingMessageCore(Message message, TimeSpan timeout, SecurityProtocolCorrelationState correlationState, AsyncCallback callback, object state)
{
SecurityToken signingToken;
SecurityToken encryptionToken;
SecurityToken sourceToken;
SecurityTokenParameters tokenParameters;
this.GetTokensForOutgoingMessages(out signingToken, out encryptionToken, out sourceToken, out tokenParameters);
IList<SupportingTokenSpecification> supportingTokens;
TimeoutHelper timeoutHelper = new TimeoutHelper(timeout);
if (TryGetSupportingTokens(this.Factory, this.Target, this.Via, message, timeoutHelper.RemainingTime(), false, out supportingTokens))
{
SecurityProtocolCorrelationState newCorrelationState = CreateCorrelationStateIfRequired();
SetUpDelayedSecurityExecution(ref message, signingToken, encryptionToken, sourceToken, tokenParameters, supportingTokens, newCorrelationState);
return new CompletedAsyncResult<Message, SecurityProtocolCorrelationState>(message, newCorrelationState, callback, state);
}
else
{
return new SecureOutgoingMessageAsyncResult(message, this, signingToken, encryptionToken, sourceToken, tokenParameters, timeoutHelper.RemainingTime(), callback, state);
}
}
internal SecurityProtocolCorrelationState CreateCorrelationStateIfRequired()
{
if (this.ReturnCorrelationState)
{
return new SecurityProtocolCorrelationState(null);
}
else
{
return null;
}
}
protected override SecurityProtocolCorrelationState SecureOutgoingMessageCore(ref Message message, TimeSpan timeout, SecurityProtocolCorrelationState correlationState)
{
SecurityToken signingToken;
SecurityToken encryptionToken;
SecurityToken sourceToken;
SecurityTokenParameters tokenParameters;
this.GetTokensForOutgoingMessages(out signingToken, out encryptionToken, out sourceToken, out tokenParameters);
SecurityProtocolCorrelationState newCorrelationState = CreateCorrelationStateIfRequired();
IList<SupportingTokenSpecification> supportingTokens;
this.TryGetSupportingTokens(this.SecurityProtocolFactory, this.Target, this.Via, message, timeout, true, out supportingTokens);
SetUpDelayedSecurityExecution(ref message, signingToken, encryptionToken, sourceToken, tokenParameters, supportingTokens, newCorrelationState);
return newCorrelationState;
}
protected override void EndSecureOutgoingMessageCore(IAsyncResult result, out Message message, out SecurityProtocolCorrelationState newCorrelationState)
{
if (result is CompletedAsyncResult<Message, SecurityProtocolCorrelationState>)
{
message = CompletedAsyncResult<Message, SecurityProtocolCorrelationState>.End(result, out newCorrelationState);
}
else
{
message = SecureOutgoingMessageAsyncResult.End(result, out newCorrelationState);
}
}
internal void SetUpDelayedSecurityExecution(ref Message message, SecurityToken signingToken, SecurityToken encryptionToken, SecurityToken sourceToken, SecurityTokenParameters tokenParameters,
IList<SupportingTokenSpecification> supportingTokens, SecurityProtocolCorrelationState correlationState)
{
SessionSymmetricMessageSecurityProtocolFactory factory = this.Factory;
string actor = string.Empty;
SendSecurityHeader securityHeader = ConfigureSendSecurityHeader(message, actor, supportingTokens, correlationState);
if (sourceToken != null)
{
securityHeader.AddPrerequisiteToken(sourceToken);
}
if (this.Factory.ApplyIntegrity)
{
securityHeader.SetSigningToken(signingToken, tokenParameters);
}
if (Factory.ApplyConfidentiality)
{
securityHeader.SetEncryptionToken(encryptionToken, tokenParameters);
}
message = securityHeader.SetupExecution();
}
protected override SecurityProtocolCorrelationState VerifyIncomingMessageCore(ref Message message, string actor, TimeSpan timeout, SecurityProtocolCorrelationState[] correlationStates)
{
SessionSymmetricMessageSecurityProtocolFactory factory = this.Factory;
IList<SupportingTokenAuthenticatorSpecification> dummyAuthenticators;
ReceiveSecurityHeader securityHeader = ConfigureReceiveSecurityHeader(message, string.Empty, correlationStates, this.requireDerivedKeys ? this.sessionStandardsManager : null, out dummyAuthenticators);
List<SecurityToken> sessionTokens = GetIncomingSessionTokens();
securityHeader.ConfigureSymmetricBindingClientReceiveHeader(sessionTokens, this.Factory.SecurityTokenParameters);
// do not enforce the key derivation requirement for CancelResponse due to WSE interop
securityHeader.EnforceDerivedKeyRequirement = (message.Headers.Action != factory.StandardsManager.SecureConversationDriver.CloseResponseAction.Value);
ProcessSecurityHeader(securityHeader, ref message, null, timeout, correlationStates);
SecurityToken signingToken = securityHeader.SignatureToken;
// verify that the signing token was one of the session tokens
bool isSessionToken = false;
for (int i = 0; i < sessionTokens.Count; ++i)
{
if (Object.ReferenceEquals(signingToken, sessionTokens[i]))
{
isSessionToken = true;
break;
}
}
if (!isSessionToken)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperWarning(new MessageSecurityException(SR.GetString(SR.NoSessionTokenPresentInMessage)));
}
if (factory.RequireIntegrity)
{
ReadOnlyCollection<IAuthorizationPolicy> signingTokenPolicies = this.sessionTokenAuthenticator.ValidateToken(signingToken);
DoIdentityCheckAndAttachInitiatorSecurityProperty(message, signingToken, signingTokenPolicies);
}
return null;
}
sealed class SecureOutgoingMessageAsyncResult : GetSupportingTokensAsyncResult
{
Message message;
InitiatorSessionSymmetricMessageSecurityProtocol binding;
SecurityToken signingToken;
SecurityToken encryptionToken;
SecurityToken sourceToken;
SecurityTokenParameters tokenParameters;
SecurityProtocolCorrelationState newCorrelationState;
public SecureOutgoingMessageAsyncResult(Message message, InitiatorSessionSymmetricMessageSecurityProtocol binding, SecurityToken signingToken, SecurityToken encryptionToken, SecurityToken sourceToken, SecurityTokenParameters tokenParameters, TimeSpan timeout, AsyncCallback callback, object state)
: base(message, binding, timeout, callback, state)
{
this.message = message;
this.binding = binding;
this.signingToken = signingToken;
this.encryptionToken = encryptionToken;
this.sourceToken = sourceToken;
this.tokenParameters = tokenParameters;
this.Start();
}
protected override bool OnGetSupportingTokensDone(TimeSpan timeout)
{
newCorrelationState = binding.CreateCorrelationStateIfRequired();
binding.SetUpDelayedSecurityExecution(ref message, signingToken, encryptionToken, sourceToken, tokenParameters, this.SupportingTokens, newCorrelationState);
return true;
}
internal static Message End(IAsyncResult result, out SecurityProtocolCorrelationState newCorrelationState)
{
SecureOutgoingMessageAsyncResult self = AsyncResult.End<SecureOutgoingMessageAsyncResult>(result);
newCorrelationState = self.newCorrelationState;
return self.message;
}
}
}
}
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