private Assertion CreateAssertion(User user, string receiver)
{
Assertion assertion = new Assertion();
{ // Subject element
assertion.Subject = new Subject();
assertion.ID = "id" + Guid.NewGuid().ToString("N");
assertion.IssueInstant = DateTime.Now.AddMinutes(10);
assertion.Issuer = new NameID();
assertion.Issuer.Value = IDPConfig.ServerBaseUrl;
SubjectConfirmation subjectConfirmation = new SubjectConfirmation();
subjectConfirmation.Method = SubjectConfirmation.BEARER_METHOD;
subjectConfirmation.SubjectConfirmationData = new SubjectConfirmationData();
subjectConfirmation.SubjectConfirmationData.NotOnOrAfter = DateTime.Now.AddHours(1);
subjectConfirmation.SubjectConfirmationData.Recipient = receiver;
NameID nameId = new NameID();
nameId.Format = Saml20Constants.NameIdentifierFormats.Persistent;
nameId.Value = user.ppid;
assertion.Subject.Items = new object[] { nameId, subjectConfirmation };
}
{ // Conditions element
assertion.Conditions = new Conditions();
assertion.Conditions.Items = new List<ConditionAbstract>();
assertion.Conditions.NotOnOrAfter = DateTime.Now.AddHours(1);
AudienceRestriction audienceRestriction = new AudienceRestriction();
audienceRestriction.Audience = new List<string>();
audienceRestriction.Audience.Add(receiver);
assertion.Conditions.Items.Add(audienceRestriction);
}
List<StatementAbstract> statements = new List<StatementAbstract>(2);
{ // AuthnStatement element
AuthnStatement authnStatement = new AuthnStatement();
authnStatement.AuthnInstant = DateTime.Now;
authnStatement.SessionIndex = Convert.ToString(new Random().Next());
authnStatement.AuthnContext = new AuthnContext();
authnStatement.AuthnContext.Items =
new object[] {"urn:oasis:names:tc:SAML:2.0:ac:classes:X509"};
// Wow! Setting the AuthnContext is .... verbose.
authnStatement.AuthnContext.ItemsElementName =
new ItemsChoiceType5[] { ItemsChoiceType5.AuthnContextClassRef };
statements.Add(authnStatement);
}
{ // Generate attribute list.
AttributeStatement attributeStatement = new AttributeStatement();
List<SamlAttribute> attributes = new List<SamlAttribute>(user.Attributes.Count);
foreach (KeyValuePair<string, string> att in user.Attributes)
{
SamlAttribute attribute = new SamlAttribute();
attribute.Name = att.Key;
attribute.AttributeValue = new string[] { att.Value };
attribute.NameFormat = SamlAttribute.NAMEFORMAT_BASIC;
attributes.Add(attribute);
}
attributeStatement.Items = attributes.ToArray();
statements.Add(attributeStatement);
}
assertion.Items = statements.ToArray();
return assertion;
}
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.PreserveWhitespace = true;
assertionDoc.LoadXml(Serialization.SerializeToXmlString(response));
// Sign the assertion inside the response message.
XmlSignatureUtils.SignDocument(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();
}