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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.ServiceModel.Security
{
using System.IdentityModel.Policy;
using System.Collections.ObjectModel;
using System.IdentityModel.Claims;
using System.Collections.Generic;
using System.Runtime.Serialization;
using System.IO;
using System.Xml;
using System.ServiceModel.Dispatcher;
using System.Security.Principal;
using System.ServiceModel.Security.Tokens;
[Serializable]
class SerializableAuthorizationContext
{
static readonly IList<Type> redBitsKnownType = new List<Type>(
new Type[]
{
typeof(DefaultClaimSet),
typeof(WindowsClaimSet),
typeof(X509CertificateClaimSet),
typeof(Claim)
});
byte[] contextBlob;
DateTime expirationTime;
string id;
IList<Type> knownTypes;
SerializableAuthorizationContext(byte[] contextBlob, DateTime expirationTime, string id, IList<Type> knownTypes)
{
if (contextBlob == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("contextBlob");
}
this.expirationTime = expirationTime;
this.id = id;
this.contextBlob = contextBlob;
this.knownTypes = knownTypes;
}
public static SerializableAuthorizationContext From(AuthorizationContext authorizationContext)
{
if (authorizationContext == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("authorizationContext");
}
IList<Type> knownTypes = BuildKnownClaimTypes(authorizationContext);
byte[] contextBlob = CreateSerializableBlob(authorizationContext, knownTypes);
return new SerializableAuthorizationContext(contextBlob, authorizationContext.ExpirationTime, authorizationContext.Id, knownTypes);
}
public AuthorizationContext Retrieve()
{
List<IAuthorizationPolicy> authorizationPolicies = new List<IAuthorizationPolicy>(1);
authorizationPolicies.Add(RetrievePolicyFromBlob(this.contextBlob, this.id, this.expirationTime, this.knownTypes));
return AuthorizationContext.CreateDefaultAuthorizationContext(authorizationPolicies);
}
static IList<Type> BuildKnownClaimTypes(AuthorizationContext authorizationContext)
{
List<Type> knownTypes = new List<Type>();
foreach (ClaimSet claimSet in authorizationContext.ClaimSets)
{
Type claimSetType = claimSet.GetType();
if (!redBitsKnownType.Contains(claimSetType) && !knownTypes.Contains(claimSetType))
{
knownTypes.Add(claimSetType);
}
foreach (Claim claim in claimSet)
{
Type claimType = claim.GetType();
if (!redBitsKnownType.Contains(claimType) && !knownTypes.Contains(claimType))
{
knownTypes.Add(claimType);
}
}
}
if (knownTypes.Count != 0)
{
return knownTypes;
}
return null;
}
static byte[] CreateSerializableBlob(AuthorizationContext authorizationContext, IList<Type> knownTypes)
{
if (authorizationContext == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("authorizationContext");
}
MemoryStream stream = new MemoryStream();
XmlDictionaryWriter writer = XmlDictionaryWriter.CreateBinaryWriter(stream, SctClaimDictionary.Instance, null);
SctClaimDictionary claimDictionary = SctClaimDictionary.Instance;
writer.WriteStartElement(claimDictionary.SecurityContextSecurityToken, claimDictionary.EmptyString);
writer.WriteStartElement(claimDictionary.Version, claimDictionary.EmptyString);
writer.WriteValue(1);
writer.WriteEndElement();
if ((authorizationContext != null) && (authorizationContext.ClaimSets.Count != 0))
{
DataContractSerializer identitySerializer = DataContractSerializerDefaults.CreateSerializer(typeof(IIdentity), knownTypes, 0x7fffffff);
DataContractSerializer claimSetSerializer = DataContractSerializerDefaults.CreateSerializer(typeof(ClaimSet), knownTypes, 0x7fffffff);
DataContractSerializer claimSerializer = DataContractSerializerDefaults.CreateSerializer(typeof(Claim), knownTypes, 0x7fffffff);
SctClaimSerializer.SerializeIdentities(authorizationContext, claimDictionary, writer, identitySerializer);
writer.WriteStartElement(claimDictionary.ClaimSets, claimDictionary.EmptyString);
for (int i = 0; i < authorizationContext.ClaimSets.Count; i++)
{
SctClaimSerializer.SerializeClaimSet(authorizationContext.ClaimSets[i], claimDictionary, writer, claimSetSerializer, claimSerializer);
}
writer.WriteEndElement();
}
writer.WriteEndElement();
writer.Flush();
return stream.ToArray();
}
static IAuthorizationPolicy RetrievePolicyFromBlob(byte[] contextBlob, string id, DateTime expirationTime, IList<Type> knownTypes)
{
if (contextBlob == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("contextBlob");
}
if (id == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("id");
}
SctClaimDictionary claimDictionary = SctClaimDictionary.Instance;
XmlDictionaryReader reader = XmlDictionaryReader.CreateBinaryReader(contextBlob, 0, contextBlob.Length, claimDictionary, XmlDictionaryReaderQuotas.Max, null, null);
IList<IIdentity> identities = null;
IList<ClaimSet> claimSets = null;
int versionNumber = -1;
reader.ReadFullStartElement(claimDictionary.SecurityContextSecurityToken, claimDictionary.EmptyString);
while (reader.IsStartElement())
{
if (reader.IsStartElement(claimDictionary.Version, claimDictionary.EmptyString))
{
versionNumber = reader.ReadElementContentAsInt();
if (versionNumber != 1)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new NotSupportedException(SR2.GetString(SR2.SerializedAuthorizationContextVersionUnsupported, versionNumber)));
}
}
else
{
if (reader.IsStartElement(claimDictionary.Identities, claimDictionary.EmptyString))
{
identities = SctClaimSerializer.DeserializeIdentities(reader, claimDictionary, DataContractSerializerDefaults.CreateSerializer(typeof(IIdentity), knownTypes, 0x7fffffff));
continue;
}
if (reader.IsStartElement(claimDictionary.ClaimSets, claimDictionary.EmptyString))
{
reader.ReadStartElement();
DataContractSerializer claimSetSerializer = DataContractSerializerDefaults.CreateSerializer(typeof(ClaimSet), knownTypes, 0x7fffffff);
DataContractSerializer claimSerializer = DataContractSerializerDefaults.CreateSerializer(typeof(Claim), knownTypes, 0x7fffffff);
claimSets = new List<ClaimSet>(1);
while (reader.IsStartElement())
{
claimSets.Add(SctClaimSerializer.DeserializeClaimSet(reader, claimDictionary, claimSetSerializer, claimSerializer));
}
reader.ReadEndElement();
continue;
}
}
}
reader.ReadEndElement();
return new SctUnconditionalPolicy(identities, id, claimSets, expirationTime);
}
class SctUnconditionalPolicy : IAuthorizationPolicy, IAuthorizationComponent
{
IList<ClaimSet> claimSets;
DateTime expirationTime;
string id;
IList<IIdentity> identities;
public SctUnconditionalPolicy(IList<IIdentity> identities, string id, IList<ClaimSet> claimSets, DateTime expirationTime)
{
this.identities = identities;
this.claimSets = claimSets;
this.expirationTime = expirationTime;
this.id = id;
}
public string Id
{
get
{
return this.id;
}
}
public ClaimSet Issuer
{
get
{
return ClaimSet.System;
}
}
public bool Evaluate(EvaluationContext evaluationContext, ref object state)
{
for (int num1 = 0; num1 < this.claimSets.Count; num1++)
{
evaluationContext.AddClaimSet(this, this.claimSets[num1]);
}
if (this.identities != null)
{
object obj;
if (!evaluationContext.Properties.TryGetValue("Identities", out obj))
{
evaluationContext.Properties.Add("Identities", (object)this.identities);
}
else
{
List<IIdentity> identities = obj as List<IIdentity>;
if (identities != null)
{
identities.AddRange(this.identities);
}
}
}
evaluationContext.RecordExpirationTime(this.expirationTime);
return true;
}
}
}
}
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