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//------------------------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------------------------
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.IdentityModel;
using System.IdentityModel.Selectors;
using System.IdentityModel.Tokens;
using System.ServiceModel.Security.Tokens;
using SystemUniqueId = System.Xml.UniqueId;
using SR = System.ServiceModel.SR;
namespace System.ServiceModel.Security
{
/// <summary>
/// The purpose of this class is to provide an ISecurityContextSecurityTokenCache contract over a SecurityTokenCache.
/// This allows for a consistent interface for the SecurityContextSecurityTokenHandler and a SessionSecurityTokenHandler.
/// The SecurityTokenCache can be passed to the SecurityContextSecurityTokenHandler and wrapped to expose an ISecurityContextSecurityTokenCache
/// that can be set to the be the token cache for WCF context tokens
/// </summary>
class WrappedTokenCache : SecurityTokenResolver, ISecurityContextSecurityTokenCache
{
SessionSecurityTokenCache _tokenCache;
SctClaimsHandler _claimsHandler;
public WrappedTokenCache(SessionSecurityTokenCache tokenCache, SctClaimsHandler sctClaimsHandler)
{
if (tokenCache == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("tokenCache");
}
if (sctClaimsHandler == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("sctClaimsHandler");
}
_tokenCache = tokenCache;
_claimsHandler = sctClaimsHandler;
}
#region ISecurityContextSecurityTokenCache Members
public void AddContext(SecurityContextSecurityToken token)
{
//
// WCF will cache the token first before calling the WrappedSessionSecurityTokenHandler.OnTokenIssued.
// We need to map the claims here so we will be caching the correct token with Geneva Claims substitued
// in place of the WCF claims.
//
_claimsHandler.SetPrincipalBootstrapTokensAndBindIdfxAuthPolicy(token);
SessionSecurityTokenCacheKey key = new SessionSecurityTokenCacheKey(_claimsHandler.EndpointId, token.ContextId, token.KeyGeneration);
SessionSecurityToken sessionToken = SecurityContextSecurityTokenHelper.ConvertSctToSessionToken(token, SecureConversationVersion.Default);
DateTime expiryTime = DateTimeUtil.Add(sessionToken.ValidTo, _claimsHandler.SecurityTokenHandlerCollection.Configuration.MaxClockSkew);
_tokenCache.AddOrUpdate(key, sessionToken, expiryTime);
}
public void ClearContexts()
{
_tokenCache.RemoveAll(_claimsHandler.EndpointId);
}
/// <summary>
/// Called to retrieve all tokens that match a particular contextId. WCF will call this
/// </summary>
/// <param name="contextId"></param>
/// <returns></returns>
public Collection<SecurityContextSecurityToken> GetAllContexts(System.Xml.UniqueId contextId)
{
Collection<SecurityContextSecurityToken> tokens = new Collection<SecurityContextSecurityToken>();
IEnumerable<SessionSecurityToken> cachedTokens = _tokenCache.GetAll(_claimsHandler.EndpointId, contextId);
if (cachedTokens != null)
{
foreach (SessionSecurityToken sessionSct in cachedTokens)
{
if (sessionSct != null && sessionSct.IsSecurityContextSecurityTokenWrapper)
{
SecurityContextSecurityToken sctToken = SecurityContextSecurityTokenHelper.ConvertSessionTokenToSecurityContextSecurityToken(sessionSct);
tokens.Add(sctToken);
}
}
}
return tokens;
}
public SecurityContextSecurityToken GetContext(System.Xml.UniqueId contextId, System.Xml.UniqueId generation)
{
SessionSecurityToken token = null;
SessionSecurityTokenCacheKey key = new SessionSecurityTokenCacheKey(_claimsHandler.EndpointId, contextId, generation);
token = _tokenCache.Get(key);
SecurityContextSecurityToken sctToken = null;
if (token != null && token.IsSecurityContextSecurityTokenWrapper)
{
sctToken = SecurityContextSecurityTokenHelper.ConvertSessionTokenToSecurityContextSecurityToken(token);
}
return sctToken;
}
/// <summary>
/// Removes all the tokens that match the contextId.
/// </summary>
/// <param name="contextId">The context id.</param>
/// <remarks>
/// When WCF renews a token, its context id is the same as the issuedToken. The only
/// difference is in the generationId. When WCF closes the session channel, all the tokens that
/// were issued need to be removed that match the contextId.
/// </remarks>
public void RemoveAllContexts(System.Xml.UniqueId contextId)
{
_tokenCache.RemoveAll(_claimsHandler.EndpointId, contextId);
}
public void RemoveContext(System.Xml.UniqueId contextId, System.Xml.UniqueId generation)
{
SessionSecurityTokenCacheKey key = new SessionSecurityTokenCacheKey(_claimsHandler.EndpointId, contextId, generation);
_tokenCache.Remove(key);
}
public bool TryAddContext(SecurityContextSecurityToken token)
{
//
// WCF will cache the token first before calling the WrappedSessionSecurityTokenHandler.OnTokenIssued.
// We need to map the claims here so we will be caching the correct token with Geneva Claims substitued
// in place of the WCF claims.
//
_claimsHandler.SetPrincipalBootstrapTokensAndBindIdfxAuthPolicy(token);
SessionSecurityTokenCacheKey key = new SessionSecurityTokenCacheKey(_claimsHandler.EndpointId, token.ContextId, token.KeyGeneration);
SessionSecurityToken sessionToken = SecurityContextSecurityTokenHelper.ConvertSctToSessionToken(token, SecureConversationVersion.Default);
DateTime expiryTime = DateTimeUtil.Add(token.ValidTo, _claimsHandler.SecurityTokenHandlerCollection.Configuration.MaxClockSkew);
_tokenCache.AddOrUpdate(key, sessionToken, expiryTime);
return true;
}
public void UpdateContextCachingTime(SecurityContextSecurityToken token, DateTime expirationTime)
{
if (token.ValidTo <= expirationTime.ToUniversalTime())
{
return;
}
SessionSecurityTokenCacheKey key = new SessionSecurityTokenCacheKey(_claimsHandler.EndpointId, token.ContextId, token.KeyGeneration);
SessionSecurityToken sessionToken = SecurityContextSecurityTokenHelper.ConvertSctToSessionToken(token, SecureConversationVersion.Default);
DateTime expiryTime = DateTimeUtil.Add(sessionToken.ValidTo, _claimsHandler.SecurityTokenHandlerCollection.Configuration.MaxClockSkew);
if (_tokenCache.Get(key) == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperInvalidOperation(SR.GetString(SR.ID4285, sessionToken.ContextId.ToString()));
}
_tokenCache.AddOrUpdate(key, sessionToken, expiryTime);
}
#endregion
// these are not needed as this will never be used as an SecurityTokenResolver.
protected override bool TryResolveSecurityKeyCore(SecurityKeyIdentifierClause keyIdentifierClause, out SecurityKey key)
{
SecurityToken sct;
if (TryResolveTokenCore(keyIdentifierClause, out sct))
{
key = ((SecurityContextSecurityToken)sct).SecurityKeys[0];
return true;
}
else
{
key = null;
return false;
}
}
protected override bool TryResolveTokenCore(SecurityKeyIdentifierClause keyIdentifierClause, out SecurityToken token)
{
SecurityContextKeyIdentifierClause sctSkiClause = keyIdentifierClause as SecurityContextKeyIdentifierClause;
if (sctSkiClause != null)
{
token = GetContext(sctSkiClause.ContextId, sctSkiClause.Generation) as SecurityToken;
}
else
{
token = null;
}
return (token != null);
}
protected override bool TryResolveTokenCore(SecurityKeyIdentifier keyIdentifier, out SecurityToken token)
{
SecurityContextKeyIdentifierClause sctSkiClause;
if (keyIdentifier.TryFind<SecurityContextKeyIdentifierClause>(out sctSkiClause))
{
return TryResolveTokenCore(sctSkiClause, out token);
}
else
{
token = null;
return false;
}
}
}
}
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