private void CreateAssertionResponse(User user)
{
string entityId = request.Issuer.Value;
Saml20MetadataDocument metadataDocument = IDPConfig.GetServiceProviderMetadata(entityId);
IDPEndPointElement endpoint =
metadataDocument.AssertionConsumerServiceEndpoints().Find(delegate(IDPEndPointElement e) { return(e.Binding == SAMLBinding.POST); });
if (endpoint == null)
{
Context.Response.Write(string.Format("'{0}' does not have a SSO endpoint that supports the POST binding.", entityId));
Context.Response.End();
return;
}
UserSessionsHandler.AddLoggedInSession(entityId);
Response response = new Response();
response.Destination = endpoint.Url;
response.InResponseTo = request.ID;
response.Status = new Status();
response.Status.StatusCode = new StatusCode();
response.Status.StatusCode.Value = Saml20Constants.StatusCodes.Success;
Assertion assertion = CreateAssertion(user, entityId);
response.Items = new object[] { assertion };
// Serialize the response.
XmlDocument assertionDoc = new XmlDocument();
assertionDoc.XmlResolver = null;
assertionDoc.PreserveWhitespace = true;
assertionDoc.LoadXml(Serialization.SerializeToXmlString(response));
// Sign the assertion inside the response message.
var signatureProvider = SignatureProviderFactory.CreateFromShaHashingAlgorithmName(ShaHashingAlgorithm.SHA256);
signatureProvider.SignAssertion(assertionDoc, assertion.ID, IDPConfig.IDPCertificate);
HttpPostBindingBuilder builder = new HttpPostBindingBuilder(endpoint);
builder.Action = SAMLAction.SAMLResponse;
builder.Response = assertionDoc.OuterXml;
builder.GetPage().ProcessRequest(Context);
Context.Response.End();
}
private static void HandleLogoutResponse(HttpRedirectBindingParser parser)
{
LogoutResponse res = Serialization.DeserializeFromXmlString <LogoutResponse>(parser.Message);
// Retrieve metadata of requestor.
string SPID = res.Issuer.Value;
Saml20MetadataDocument SPmetadata = GetMetadata(SPID);
if (parser.IsSigned && !CheckRedirectSignature(parser, SPmetadata))
{
HandleUnableToVerifySignature(SPID);
return;
}
// Remove the Service Provider from the list of the user's active sessions.
UserSessionsHandler.RemoveLoggedInSession(SPID);
Logout();
}
private static void HandleLogoutRequest(HttpRedirectBindingParser parser)
{
LogoutRequest req = Serialization.DeserializeFromXmlString <LogoutRequest>(parser.Message);
// Retrieve metadata of requestor.
string SPID = req.Issuer.Value;
Saml20MetadataDocument SPmetadata = GetMetadata(SPID);
if (parser.IsSigned && !CheckRedirectSignature(parser, SPmetadata))
{
HandleUnableToVerifySignature(SPID);
return;
}
// Set the entity ID of the federation partner that initiated the logout.
HttpContext.Current.Session[LOGOUTINITIATORKEY] = SPID;
UserSessionsHandler.RemoveLoggedInSession(SPID);
Logout();
}
/// <summary>
/// Initiate logout.
/// </summary>
private static void Logout()
{
List <string> sessions = UserSessionsHandler.GetLoggedInSessions();
if (sessions.Count > 0)
{
// Retrieve the next entity id and initiate logout.
string entityId = sessions[0];
UserSessionsHandler.RemoveLoggedInSession(entityId);
CreateLogoutRequest(entityId);
}
else
{
// No more active sessions. Send a LogoutResponse to the service provider that initiated the Logout.
string initiatingEntity = (string)HttpContext.Current.Session[LOGOUTINITIATORKEY];
HttpContext.Current.Session.Remove(LOGOUTINITIATORKEY);
UserSessionsHandler.DestroySession();
CreateLogoutResponse(initiatingEntity);
}
}
private void CreateAssertionResponse(User user)
{
string entityId = request.Issuer.Value;
Saml20MetadataDocument metadataDocument = IDPConfig.GetServiceProviderMetadata(entityId);
IDPEndPointElement endpoint =
metadataDocument.AssertionConsumerServiceEndpoints().Find(delegate(IDPEndPointElement e) { return(e.Binding == SAMLBinding.POST); });
if (endpoint == null)
{
Context.Response.Write(string.Format("'{0}' does not have a SSO endpoint that supports the POST binding.", entityId));
Context.Response.End();
return;
}
UserSessionsHandler.AddLoggedInSession(entityId);
Response response = new Response();
response.Destination = endpoint.Url;
response.InResponseTo = request.ID;
response.Status = new Status();
response.Status.StatusCode = new StatusCode();
response.Status.StatusCode.Value = Saml20Constants.StatusCodes.Success;
var nameIdFormat = metadataDocument.Entity.Items.OfType <SPSSODescriptor>().SingleOrDefault()?.NameIDFormat.SingleOrDefault() ?? Saml20Constants.NameIdentifierFormats.Persistent;
Assertion assertion = CreateAssertion(user, entityId, nameIdFormat);
var signatureProvider = SignatureProviderFactory.CreateFromShaHashingAlgorithmName(ShaHashingAlgorithm.SHA256);
EncryptedAssertion encryptedAssertion = null;
var keyDescriptors = metadataDocument.Keys.Where(x => x.use == KeyTypes.encryption);
if (keyDescriptors.Any())
{
foreach (KeyDescriptor keyDescriptor in keyDescriptors)
{
KeyInfo ki = (KeyInfo)keyDescriptor.KeyInfo;
foreach (KeyInfoClause clause in ki)
{
if (clause is KeyInfoX509Data)
{
X509Certificate2 cert = XmlSignatureUtils.GetCertificateFromKeyInfo((KeyInfoX509Data)clause);
var spec = new DefaultCertificateSpecification();
string error;
if (spec.IsSatisfiedBy(cert, out error))
{
AsymmetricAlgorithm key = XmlSignatureUtils.ExtractKey(clause);
AssertionEncryptionUtility.AssertionEncryptionUtility encryptedAssertionUtil = new AssertionEncryptionUtility.AssertionEncryptionUtility((RSA)key, assertion);
// Sign the assertion inside the response message.
signatureProvider.SignAssertion(encryptedAssertionUtil.Assertion, assertion.ID, IDPConfig.IDPCertificate);
encryptedAssertionUtil.Encrypt();
encryptedAssertion = Serialization.DeserializeFromXmlString <EncryptedAssertion>(encryptedAssertionUtil.EncryptedAssertion.OuterXml);
break;
}
}
}
if (encryptedAssertion != null)
{
break;
}
}
if (encryptedAssertion == null)
{
throw new Exception("Could not encrypt. No valid certificates found.");
}
}
if (encryptedAssertion != null)
{
response.Items = new object[] { encryptedAssertion };
}
else
{
response.Items = new object[] { assertion };
}
// Serialize the response.
XmlDocument responseDoc = new XmlDocument();
responseDoc.XmlResolver = null;
responseDoc.PreserveWhitespace = true;
responseDoc.LoadXml(Serialization.SerializeToXmlString(response));
if (encryptedAssertion == null)
{
// Sign the assertion inside the response message.
signatureProvider.SignAssertion(responseDoc, assertion.ID, IDPConfig.IDPCertificate);
}
HttpPostBindingBuilder builder = new HttpPostBindingBuilder(endpoint);
builder.Action = SAMLAction.SAMLResponse;
builder.Response = responseDoc.OuterXml;
builder.GetPage().ProcessRequest(Context);
Context.Response.End();
}
