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//
// SecurityTokenResolver.cs
//
// Author:
// Atsushi Enomoto <atsushi@ximian.com>
//
// Copyright (C) 2005-2006 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.IdentityModel.Tokens;
namespace System.IdentityModel.Selectors
{
public abstract class SecurityTokenResolver
{
protected SecurityTokenResolver ()
{
}
public static SecurityTokenResolver CreateDefaultSecurityTokenResolver (
ReadOnlyCollection<SecurityToken> tokens,
bool canMatchLocalId)
{
return new DefaultSecurityTokenResolver (tokens, canMatchLocalId);
}
public SecurityKey ResolveSecurityKey (
SecurityKeyIdentifierClause keyIdentifierClause)
{
if (keyIdentifierClause == null)
throw new ArgumentNullException ("keyIdentifierClause");
SecurityKey ret;
if (!TryResolveSecurityKey (keyIdentifierClause, out ret))
throw new InvalidOperationException (String.Format ("Could not resolve security key with the key identifier clause '{0}'", keyIdentifierClause));
return ret;
}
public SecurityToken ResolveToken (
SecurityKeyIdentifier keyIdentifier)
{
if (keyIdentifier == null)
throw new ArgumentNullException ("keyIdentifierClause");
SecurityToken ret;
if (!TryResolveToken (keyIdentifier, out ret))
throw new InvalidOperationException (String.Format ("Could not resolve security token from the key identifier '{0}'", keyIdentifier));
return ret;
}
public SecurityToken ResolveToken (
SecurityKeyIdentifierClause keyIdentifierClause)
{
if (keyIdentifierClause == null)
throw new ArgumentNullException ("keyIdentifierClause");
SecurityToken ret;
if (!TryResolveToken (keyIdentifierClause, out ret))
throw new InvalidOperationException (String.Format ("Could not resolve security token from the key identifier clause '{0}'", keyIdentifierClause));
return ret;
}
public bool TryResolveSecurityKey (
SecurityKeyIdentifierClause keyIdentifierClause, out SecurityKey key)
{
return TryResolveSecurityKeyCore (keyIdentifierClause, out key);
}
public bool TryResolveToken (
SecurityKeyIdentifier keyIdentifier,
out SecurityToken token)
{
return TryResolveTokenCore (keyIdentifier, out token);
}
public bool TryResolveToken (
SecurityKeyIdentifierClause keyIdentifierClause,
out SecurityToken token)
{
return TryResolveTokenCore (keyIdentifierClause, out token);
}
protected abstract bool TryResolveSecurityKeyCore (
SecurityKeyIdentifierClause keyIdentifierClause,
out SecurityKey key);
protected abstract bool TryResolveTokenCore (
SecurityKeyIdentifier keyIdentifier,
out SecurityToken token);
protected abstract bool TryResolveTokenCore (
SecurityKeyIdentifierClause keyIdentifierClause,
out SecurityToken token);
class DefaultSecurityTokenResolver : SecurityTokenResolver
{
ReadOnlyCollection<SecurityToken> tokens;
bool match_local;
public DefaultSecurityTokenResolver (
ReadOnlyCollection<SecurityToken> tokens,
bool canMatchLocalId)
{
this.tokens = tokens;
this.match_local = canMatchLocalId;
}
protected override bool TryResolveSecurityKeyCore (
SecurityKeyIdentifierClause clause,
out SecurityKey key)
{
if (clause == null)
throw new ArgumentNullException ("clause");
foreach (SecurityToken token in tokens)
if (TokenMatchesClause (token, clause)) {
key = token.ResolveKeyIdentifierClause (clause);
if (key != null)
return true;
}
key = null;
return false;
}
protected override bool TryResolveTokenCore (
SecurityKeyIdentifier keyIdentifier,
out SecurityToken token)
{
if (keyIdentifier == null)
throw new ArgumentNullException ("keyIdentifier");
foreach (SecurityKeyIdentifierClause kic in keyIdentifier)
if (TryResolveTokenCore (kic, out token))
return true;
token = null;
return false;
}
protected override bool TryResolveTokenCore (
SecurityKeyIdentifierClause clause,
out SecurityToken token)
{
if (clause == null)
throw new ArgumentNullException ("clause");
foreach (SecurityToken t in tokens)
if (TokenMatchesClause (t, clause)) {
token = t;
return true;
}
token = null;
return false;
}
bool TokenMatchesClause (SecurityToken token, SecurityKeyIdentifierClause clause)
{
if (token.MatchesKeyIdentifierClause (clause))
return true;
if (!match_local)
return false;
LocalIdKeyIdentifierClause l =
clause as LocalIdKeyIdentifierClause;
return l != null && l.Matches (token.Id, token.GetType ());
}
}
}
}
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