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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.IdentityModel.Selectors
{
using System.IdentityModel.Diagnostics;
using System.IdentityModel.Tokens;
using System.Runtime;
using System.Threading;
public abstract class SecurityTokenProvider
{
protected SecurityTokenProvider() { }
public virtual bool SupportsTokenRenewal
{
get { return false; }
}
public virtual bool SupportsTokenCancellation
{
get { return false; }
}
public SecurityToken GetToken(TimeSpan timeout)
{
SecurityToken token = this.GetTokenCore(timeout);
if (token == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new SecurityTokenException(SR.GetString(SR.TokenProviderUnableToGetToken, this)));
}
return token;
}
public IAsyncResult BeginGetToken(TimeSpan timeout, AsyncCallback callback, object state)
{
return this.BeginGetTokenCore(timeout, callback, state);
}
public SecurityToken EndGetToken(IAsyncResult result)
{
if (result == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("result");
}
SecurityToken token = this.EndGetTokenCore(result);
if (token == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new SecurityTokenException(SR.GetString(SR.TokenProviderUnableToGetToken, this)));
}
return token;
}
public SecurityToken RenewToken(TimeSpan timeout, SecurityToken tokenToBeRenewed)
{
if (tokenToBeRenewed == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("tokenToBeRenewed");
}
SecurityToken token = this.RenewTokenCore(timeout, tokenToBeRenewed);
if (token == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new SecurityTokenException(SR.GetString(SR.TokenProviderUnableToRenewToken, this)));
}
return token;
}
public IAsyncResult BeginRenewToken(TimeSpan timeout, SecurityToken tokenToBeRenewed, AsyncCallback callback, object state)
{
if (tokenToBeRenewed == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("tokenToBeRenewed");
}
return this.BeginRenewTokenCore(timeout, tokenToBeRenewed, callback, state);
}
public SecurityToken EndRenewToken(IAsyncResult result)
{
if (result == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("result");
}
SecurityToken token = this.EndRenewTokenCore(result);
if (token == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new SecurityTokenException(SR.GetString(SR.TokenProviderUnableToRenewToken, this)));
}
return token;
}
public void CancelToken(TimeSpan timeout, SecurityToken token)
{
if (token == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("token");
}
this.CancelTokenCore(timeout, token);
}
public IAsyncResult BeginCancelToken(TimeSpan timeout, SecurityToken token, AsyncCallback callback, object state)
{
if (token == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("token");
}
return this.BeginCancelTokenCore(timeout, token, callback, state);
}
public void EndCancelToken(IAsyncResult result)
{
if (result == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("result");
}
this.EndCancelTokenCore(result);
}
// protected methods
protected abstract SecurityToken GetTokenCore(TimeSpan timeout);
protected virtual SecurityToken RenewTokenCore(TimeSpan timeout, SecurityToken tokenToBeRenewed)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new NotSupportedException(SR.GetString(SR.TokenRenewalNotSupported, this)));
}
protected virtual void CancelTokenCore(TimeSpan timeout, SecurityToken token)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new NotSupportedException(SR.GetString(SR.TokenCancellationNotSupported, this)));
}
protected virtual IAsyncResult BeginGetTokenCore(TimeSpan timeout, AsyncCallback callback, object state)
{
SecurityToken token = this.GetToken(timeout);
return new SecurityTokenAsyncResult(token, callback, state);
}
protected virtual SecurityToken EndGetTokenCore(IAsyncResult result)
{
return SecurityTokenAsyncResult.End(result);
}
protected virtual IAsyncResult BeginRenewTokenCore(TimeSpan timeout, SecurityToken tokenToBeRenewed, AsyncCallback callback, object state)
{
SecurityToken token = this.RenewTokenCore(timeout, tokenToBeRenewed);
return new SecurityTokenAsyncResult(token, callback, state);
}
protected virtual SecurityToken EndRenewTokenCore(IAsyncResult result)
{
return SecurityTokenAsyncResult.End(result);
}
protected virtual IAsyncResult BeginCancelTokenCore(TimeSpan timeout, SecurityToken token, AsyncCallback callback, object state)
{
this.CancelToken(timeout, token);
return new SecurityTokenAsyncResult(null, callback, state);
}
protected virtual void EndCancelTokenCore(IAsyncResult result)
{
SecurityTokenAsyncResult.End(result);
}
internal protected class SecurityTokenAsyncResult : IAsyncResult
{
SecurityToken token;
object state;
ManualResetEvent manualResetEvent;
object thisLock = new object();
public SecurityTokenAsyncResult(SecurityToken token, AsyncCallback callback, object state)
{
this.token = token;
this.state = state;
if (callback != null)
{
try
{
callback(this);
}
#pragma warning suppress 56500
catch (Exception e)
{
if (Fx.IsFatal(e))
throw;
throw DiagnosticUtility.ExceptionUtility.ThrowHelperCallback(SR.GetString(SR.AsyncCallbackException), e);
}
}
}
public object AsyncState
{
get { return this.state; }
}
public WaitHandle AsyncWaitHandle
{
get
{
if (this.manualResetEvent != null)
{
return this.manualResetEvent;
}
lock (thisLock)
{
if (this.manualResetEvent == null)
{
this.manualResetEvent = new ManualResetEvent(true);
}
}
return this.manualResetEvent;
}
}
public bool CompletedSynchronously
{
get { return true; }
}
public bool IsCompleted
{
get { return true; }
}
public static SecurityToken End(IAsyncResult result)
{
if (result == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("result");
}
SecurityTokenAsyncResult completedResult = result as SecurityTokenAsyncResult;
if (completedResult == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentException(SR.GetString(SR.InvalidAsyncResult), "result"));
}
return completedResult.token;
}
}
}
}
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