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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.ServiceModel.Security.Tokens
{
using System.Collections.ObjectModel;
using System.IdentityModel;
using System.IdentityModel.Tokens;
using System.Runtime.CompilerServices;
using System.Security.Cryptography;
using System.ServiceModel.Security;
using System.Xml;
[TypeForwardedFrom("System.ServiceModel, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089")]
public class WrappedKeySecurityToken : SecurityToken
{
string id;
DateTime effectiveTime;
EncryptedKey encryptedKey;
ReadOnlyCollection<SecurityKey> securityKey;
byte[] wrappedKey;
string wrappingAlgorithm;
ISspiNegotiation wrappingSspiContext;
SecurityToken wrappingToken;
SecurityKey wrappingSecurityKey;
SecurityKeyIdentifier wrappingTokenReference;
bool serializeCarriedKeyName;
byte[] wrappedKeyHash;
XmlDictionaryString wrappingAlgorithmDictionaryString;
// sender use
internal WrappedKeySecurityToken(string id, byte[] keyToWrap, ISspiNegotiation wrappingSspiContext)
: this(id, keyToWrap, (wrappingSspiContext != null) ? (wrappingSspiContext.KeyEncryptionAlgorithm) : null, wrappingSspiContext, null)
{
}
// sender use
public WrappedKeySecurityToken(string id, byte[] keyToWrap, string wrappingAlgorithm, SecurityToken wrappingToken, SecurityKeyIdentifier wrappingTokenReference)
: this(id, keyToWrap, wrappingAlgorithm, null, wrappingToken, wrappingTokenReference)
{
}
internal WrappedKeySecurityToken(string id, byte[] keyToWrap, string wrappingAlgorithm, XmlDictionaryString wrappingAlgorithmDictionaryString, SecurityToken wrappingToken, SecurityKeyIdentifier wrappingTokenReference)
: this(id, keyToWrap, wrappingAlgorithm, wrappingAlgorithmDictionaryString, wrappingToken, wrappingTokenReference, null, null)
{
}
// direct receiver use, chained sender use
internal WrappedKeySecurityToken(string id, byte[] keyToWrap, string wrappingAlgorithm, ISspiNegotiation wrappingSspiContext, byte[] wrappedKey)
: this(id, keyToWrap, wrappingAlgorithm, null)
{
if (wrappingSspiContext == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("wrappingSspiContext");
}
this.wrappingSspiContext = wrappingSspiContext;
if (wrappedKey == null)
{
this.wrappedKey = wrappingSspiContext.Encrypt(keyToWrap);
}
else
{
this.wrappedKey = wrappedKey;
}
this.serializeCarriedKeyName = false;
}
// receiver use
internal WrappedKeySecurityToken(string id, byte[] keyToWrap, string wrappingAlgorithm, SecurityToken wrappingToken, SecurityKeyIdentifier wrappingTokenReference, byte[] wrappedKey, SecurityKey wrappingSecurityKey)
: this(id, keyToWrap, wrappingAlgorithm, null, wrappingToken, wrappingTokenReference, wrappedKey, wrappingSecurityKey)
{
}
WrappedKeySecurityToken(string id, byte[] keyToWrap, string wrappingAlgorithm, XmlDictionaryString wrappingAlgorithmDictionaryString, SecurityToken wrappingToken, SecurityKeyIdentifier wrappingTokenReference, byte[] wrappedKey, SecurityKey wrappingSecurityKey)
: this(id, keyToWrap, wrappingAlgorithm, wrappingAlgorithmDictionaryString)
{
if (wrappingToken == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("wrappingToken");
}
this.wrappingToken = wrappingToken;
this.wrappingTokenReference = wrappingTokenReference;
if (wrappedKey == null)
{
this.wrappedKey = SecurityUtils.EncryptKey(wrappingToken, wrappingAlgorithm, keyToWrap);
}
else
{
this.wrappedKey = wrappedKey;
}
this.wrappingSecurityKey = wrappingSecurityKey;
this.serializeCarriedKeyName = true;
}
WrappedKeySecurityToken(string id, byte[] keyToWrap, string wrappingAlgorithm, XmlDictionaryString wrappingAlgorithmDictionaryString)
{
if (id == null)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("id");
if (wrappingAlgorithm == null)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("wrappingAlgorithm");
if (keyToWrap == null)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("securityKeyToWrap");
this.id = id;
this.effectiveTime = DateTime.UtcNow;
this.securityKey = SecurityUtils.CreateSymmetricSecurityKeys(keyToWrap);
this.wrappingAlgorithm = wrappingAlgorithm;
this.wrappingAlgorithmDictionaryString = wrappingAlgorithmDictionaryString;
}
public override string Id
{
get { return this.id; }
}
public override DateTime ValidFrom
{
get { return this.effectiveTime; }
}
public override DateTime ValidTo
{
// Never expire
get { return DateTime.MaxValue; }
}
internal EncryptedKey EncryptedKey
{
get { return this.encryptedKey; }
set { this.encryptedKey = value; }
}
internal ReferenceList ReferenceList
{
get
{
return this.encryptedKey == null ? null : this.encryptedKey.ReferenceList;
}
}
public string WrappingAlgorithm
{
get { return this.wrappingAlgorithm; }
}
internal SecurityKey WrappingSecurityKey
{
get { return this.wrappingSecurityKey; }
}
public SecurityToken WrappingToken
{
get { return this.wrappingToken; }
}
public SecurityKeyIdentifier WrappingTokenReference
{
get { return this.wrappingTokenReference; }
}
internal string CarriedKeyName
{
get { return null; }
}
public override ReadOnlyCollection<SecurityKey> SecurityKeys
{
get { return this.securityKey; }
}
internal byte[] GetHash()
{
if (this.wrappedKeyHash == null)
{
EnsureEncryptedKeySetUp();
using (HashAlgorithm hash = CryptoHelper.NewSha1HashAlgorithm())
{
this.wrappedKeyHash = hash.ComputeHash(this.encryptedKey.GetWrappedKey());
}
}
return wrappedKeyHash;
}
public byte[] GetWrappedKey()
{
return SecurityUtils.CloneBuffer(this.wrappedKey);
}
internal void EnsureEncryptedKeySetUp()
{
if (this.encryptedKey == null)
{
EncryptedKey ek = new EncryptedKey();
ek.Id = this.Id;
if (this.serializeCarriedKeyName)
{
ek.CarriedKeyName = this.CarriedKeyName;
}
else
{
ek.CarriedKeyName = null;
}
ek.EncryptionMethod = this.WrappingAlgorithm;
ek.EncryptionMethodDictionaryString = this.wrappingAlgorithmDictionaryString;
ek.SetUpKeyWrap(this.wrappedKey);
if (this.WrappingTokenReference != null)
{
ek.KeyIdentifier = this.WrappingTokenReference;
}
this.encryptedKey = ek;
}
}
public override bool CanCreateKeyIdentifierClause<T>()
{
if (typeof(T) == typeof(EncryptedKeyHashIdentifierClause))
return true;
return base.CanCreateKeyIdentifierClause<T>();
}
public override T CreateKeyIdentifierClause<T>()
{
if (typeof(T) == typeof(EncryptedKeyHashIdentifierClause))
return new EncryptedKeyHashIdentifierClause(GetHash()) as T;
return base.CreateKeyIdentifierClause<T>();
}
public override bool MatchesKeyIdentifierClause(SecurityKeyIdentifierClause keyIdentifierClause)
{
EncryptedKeyHashIdentifierClause encKeyIdentifierClause = keyIdentifierClause as EncryptedKeyHashIdentifierClause;
if (encKeyIdentifierClause != null)
return encKeyIdentifierClause.Matches(GetHash());
return base.MatchesKeyIdentifierClause(keyIdentifierClause);
}
}
}
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