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//
// WrappedKeySecurityToken.cs
//
// Author:
// Atsushi Enomoto <atsushi@ximian.com>
//
// Copyright (C) 2006 Novell, Inc. http://www.novell.com
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.Collections.ObjectModel;
using System.Security.Cryptography;
using System.Security.Cryptography.Xml;
using System.Xml;
using System.IdentityModel.Policy;
using System.IdentityModel.Tokens;
namespace System.ServiceModel.Security.Tokens
{
public class WrappedKeySecurityToken : SecurityToken
{
string id;
byte [] raw_key;
byte [] wrapped_key;
string wrap_alg;
SecurityToken wrap_token;
SecurityKeyIdentifier wrap_token_ref;
DateTime valid_from = DateTime.Now.ToUniversalTime ();
ReadOnlyCollection<SecurityKey> keys;
ReferenceList reference_list;
byte [] keyhash;
public WrappedKeySecurityToken (
string id,
byte [] keyToWrap,
string wrappingAlgorithm,
SecurityToken wrappingToken,
SecurityKeyIdentifier wrappingTokenReference)
{
if (id == null)
throw new ArgumentNullException ("id");
if (keyToWrap == null)
throw new ArgumentNullException ("keyToWrap");
if (wrappingAlgorithm == null)
throw new ArgumentNullException ("wrappingAlgorithm");
if (wrappingToken == null)
throw new ArgumentNullException ("wrappingToken");
raw_key = keyToWrap;
this.id = id;
wrap_alg = wrappingAlgorithm;
wrap_token = wrappingToken;
wrap_token_ref = wrappingTokenReference;
Collection<SecurityKey> l = new Collection<SecurityKey> ();
foreach (SecurityKey sk in wrappingToken.SecurityKeys) {
if (sk.IsSupportedAlgorithm (wrappingAlgorithm)) {
wrapped_key = sk.EncryptKey (wrappingAlgorithm, keyToWrap);
l.Add (new InMemorySymmetricSecurityKey (keyToWrap));
break;
}
}
keys = new ReadOnlyCollection<SecurityKey> (l);
if (wrapped_key == null)
throw new ArgumentException (String.Format ("None of the security keys in the argument token supports specified wrapping algorithm '{0}'", wrappingAlgorithm));
}
internal byte [] RawKey {
get { return raw_key; }
}
// It is kind of compromised solution to output
// ReferenceList inside e:EncryptedKey and might disappear
// when non-wrapped key is represented by another token type.
internal ReferenceList ReferenceList {
get { return reference_list; }
set { reference_list = value; }
}
public override DateTime ValidFrom {
get { return valid_from; }
}
public override DateTime ValidTo {
get { return DateTime.MaxValue.AddDays (-1); }
}
public override string Id {
get { return id; }
}
public override ReadOnlyCollection<SecurityKey> SecurityKeys {
get { return keys; }
}
public string WrappingAlgorithm {
get { return wrap_alg; }
}
public SecurityToken WrappingToken {
get { return wrap_token; }
}
public SecurityKeyIdentifier WrappingTokenReference {
get { return wrap_token_ref; }
}
public byte [] GetWrappedKey ()
{
return (byte []) wrapped_key.Clone ();
}
internal void SetWrappedKey (byte [] value)
{
wrapped_key = (byte []) value.Clone ();
}
[MonoTODO]
public override bool CanCreateKeyIdentifierClause<T> ()
{
/*
foreach (SecurityKeyIdentifierClause k in WrappingTokenReference) {
Type t = k.GetType ();
if (t == typeof (T) || t.IsSubclassOf (typeof (T)))
return true;
}
*/
return false;
}
[MonoTODO]
public override T CreateKeyIdentifierClause<T> ()
{
/*
foreach (SecurityKeyIdentifierClause k in WrappingTokenReference) {
Type t = k.GetType ();
if (t == typeof (T) || t.IsSubclassOf (typeof (T)))
return (T) k;
}
*/
throw new NotSupportedException (String.Format ("WrappedKeySecurityToken cannot create '{0}'", typeof (T)));
}
public override bool MatchesKeyIdentifierClause (SecurityKeyIdentifierClause keyIdentifierClause)
{
LocalIdKeyIdentifierClause lkic = keyIdentifierClause as LocalIdKeyIdentifierClause;
if (lkic != null && lkic.LocalId == Id)
return true;
InternalEncryptedKeyIdentifierClause khic = keyIdentifierClause as InternalEncryptedKeyIdentifierClause;
if (keyhash == null)
keyhash = SHA1.Create ().ComputeHash (wrapped_key);
if (khic != null && khic.Matches (keyhash))
return true;
return false;
}
}
}
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