/// <summary>
/// Handles the request.
/// </summary>
/// <param name="context">The context.</param>
private void HandleRequest(HttpContext context)
{
Logger.DebugFormat(TraceMessages.LogoutRequestReceived);
// Fetch the endpoint configuration
var idp = RetrieveIDPConfiguration(StateService.Get<string>(IdpLoginSessionKey));
var destination = DetermineEndpointConfiguration(BindingType.Redirect, idp.Endpoints.LogoutEndpoint, idp.Metadata.IDPSLOEndpoints);
// Fetch config object
var config = Saml2Config.GetConfig();
// Build the response object
var response = new Saml20LogoutResponse
{
Issuer = config.ServiceProvider.Id,
Destination = destination.Url,
StatusCode = Saml20Constants.StatusCodes.Success
};
string message;
if (context.Request.RequestType == "GET")
{
// HTTP Redirect binding
var parser = new HttpRedirectBindingParser(context.Request.Url);
Logger.DebugFormat(TraceMessages.LogoutRequestRedirectBindingParse, parser.Message, parser.SignatureAlgorithm, parser.Signature);
var endpoint = config.IdentityProviders.FirstOrDefault(x => x.Id == idp.Id);
if (endpoint == null || endpoint.Metadata == null)
{
Logger.ErrorFormat(ErrorMessages.UnknownIdentityProvider, idp.Id);
throw new Saml20Exception(string.Format(ErrorMessages.UnknownIdentityProvider, idp.Id));
}
var metadata = endpoint.Metadata;
if (!parser.VerifySignature(metadata.GetKeys(KeyTypes.Signing)))
{
Logger.Error(ErrorMessages.RequestSignatureInvalid);
throw new Saml20Exception(ErrorMessages.RequestSignatureInvalid);
}
message = parser.Message;
}
else if (context.Request.RequestType == "POST")
{
// HTTP Post binding
var parser = new HttpPostBindingParser(context);
Logger.DebugFormat(TraceMessages.LogoutRequestPostBindingParse, parser.Message);
if (!parser.IsSigned)
{
Logger.Error(ErrorMessages.RequestSignatureMissing);
throw new Saml20Exception(ErrorMessages.RequestSignatureMissing);
}
var endpoint = config.IdentityProviders.FirstOrDefault(x => x.Id == idp.Id);
if (endpoint == null || endpoint.Metadata == null)
{
Logger.ErrorFormat(ErrorMessages.UnknownIdentityProvider, idp.Id);
throw new Saml20Exception(string.Format(ErrorMessages.UnknownIdentityProvider, idp.Id));
}
var metadata = endpoint.Metadata;
// Check signature
if (!parser.CheckSignature(metadata.GetKeys(KeyTypes.Signing)))
{
Logger.Error(ErrorMessages.RequestSignatureInvalid);
throw new Saml20Exception(ErrorMessages.RequestSignatureInvalid);
}
message = parser.Message;
}
else
{
// Error: We don't support HEAD, PUT, CONNECT, TRACE, DELETE and OPTIONS
Logger.ErrorFormat(ErrorMessages.UnsupportedRequestType, context.Request.RequestType);
throw new Saml20Exception(string.Format(ErrorMessages.UnsupportedRequestType, context.Request.RequestType));
}
Logger.DebugFormat(TraceMessages.LogoutRequestParsed, message);
// Log the user out locally
DoLogout(context, true);
var req = Serialization.DeserializeFromXmlString<LogoutRequest>(message);
response.InResponseTo = req.Id;
// Respond using redirect binding
if (destination.Binding == BindingType.Redirect)
{
var builder = new HttpRedirectBindingBuilder
{
RelayState = context.Request.Params["RelayState"],
Response = response.GetXml().OuterXml,
SigningKey = Saml2Config.GetConfig().ServiceProvider.SigningCertificate.GetCertificate().PrivateKey
};
Logger.DebugFormat(TraceMessages.LogoutResponseSent, builder.Response);
context.Response.Redirect(destination.Url + "?" + builder.ToQuery(), true);
return;
}
// Respond using post binding
if (destination.Binding == BindingType.Post)
{
var builder = new HttpPostBindingBuilder(destination)
{
Action = SamlActionType.SAMLResponse
};
var responseDocument = response.GetXml();
Logger.DebugFormat(TraceMessages.LogoutResponseSent, responseDocument.OuterXml);
XmlSignatureUtils.SignDocument(responseDocument, response.Id);
builder.Response = responseDocument.OuterXml;
builder.RelayState = context.Request.Params["RelayState"];
builder.GetPage().ProcessRequest(context);
}
}
/// <summary>
/// Handles the response.
/// </summary>
/// <param name="context">The context.</param>
private void HandleResponse(HttpContext context)
{
Logger.DebugFormat(TraceMessages.LogoutResponseReceived);
var message = string.Empty;
LogoutResponse response = null;
if (context.Request.RequestType == "GET")
{
var parser = new HttpRedirectBindingParser(context.Request.Url);
response = Serialization.DeserializeFromXmlString<LogoutResponse>(parser.Message);
Logger.DebugFormat(TraceMessages.LogoutResponseRedirectBindingParse, parser.Message, parser.SignatureAlgorithm, parser.Signature);
var idp = RetrieveIDPConfiguration(response.Issuer.Value);
if (idp.Metadata == null)
{
Logger.ErrorFormat(ErrorMessages.UnknownIdentityProvider, idp.Id);
throw new Saml20Exception(string.Format(ErrorMessages.UnknownIdentityProvider, idp.Id));
}
if (!parser.VerifySignature(idp.Metadata.Keys))
{
Logger.Error(ErrorMessages.ResponseSignatureInvalid);
throw new Saml20Exception(ErrorMessages.ResponseSignatureInvalid);
}
message = parser.Message;
}
else if (context.Request.RequestType == "POST")
{
var parser = new HttpPostBindingParser(context);
Logger.DebugFormat(TraceMessages.LogoutResponsePostBindingParse, parser.Message);
response = Serialization.DeserializeFromXmlString<LogoutResponse>(parser.Message);
var idp = RetrieveIDPConfiguration(response.Issuer.Value);
if (idp.Metadata == null)
{
Logger.ErrorFormat(ErrorMessages.UnknownIdentityProvider, idp.Id);
throw new Saml20Exception(string.Format(ErrorMessages.UnknownIdentityProvider, idp.Id));
}
if (!parser.IsSigned)
{
Logger.Error(ErrorMessages.ResponseSignatureMissing);
throw new Saml20Exception(ErrorMessages.ResponseSignatureMissing);
}
// signature on final message in logout
if (!parser.CheckSignature(idp.Metadata.Keys))
{
Logger.Error(ErrorMessages.ResponseSignatureInvalid);
throw new Saml20Exception(ErrorMessages.ResponseSignatureInvalid);
}
message = parser.Message;
}
if (response == null)
{
Logger.ErrorFormat(ErrorMessages.UnsupportedRequestType, context.Request.RequestType);
throw new Saml20Exception(string.Format(ErrorMessages.UnsupportedRequestType, context.Request.RequestType));
}
Logger.DebugFormat(TraceMessages.LogoutResponseParsed, message);
if (response.Status.StatusCode.Value != Saml20Constants.StatusCodes.Success)
{
Logger.ErrorFormat(ErrorMessages.ResponseStatusNotSuccessful, response.Status.StatusCode.Value);
throw new Saml20Exception(string.Format(ErrorMessages.ResponseStatusNotSuccessful, response.Status.StatusCode.Value));
}
// Log the user out locally
DoLogout(context);
}
private void ValidateLogoutViaGet(Uri requestUrl, out string message, out LogoutResponse response)
{
var parser = new HttpRedirectBindingParser(requestUrl);
response = Serialization.DeserializeFromXmlString<LogoutResponse>(parser.Message);
logger.DebugFormat(TraceMessages.LogoutResponseRedirectBindingParse, parser.Message, parser.SignatureAlgorithm, parser.Signature);
var idp = IdpSelectionUtil.RetrieveIDPConfiguration(response.Issuer.Value, config);
if (idp.Metadata == null) {
logger.ErrorFormat(ErrorMessages.UnknownIdentityProvider, idp.Id);
throw new Saml20Exception(string.Format(ErrorMessages.UnknownIdentityProvider, idp.Id));
}
if (!parser.VerifySignature(idp.Metadata.Keys)) {
logger.Error(ErrorMessages.ResponseSignatureInvalid);
throw new Saml20Exception(ErrorMessages.ResponseSignatureInvalid);
}
message = parser.Message;
}