protected override SecurityToken GetTokenCore(TimeSpan timeout)
{
Collection <XmlElement> reqParams = new Collection <XmlElement>();
foreach (XmlElement param in tokenRequirement.AdditionalRequestParameters)
{
if (param.NamespaceURI == "urn:oasis:names:tc:SAML:1.0:assertion")
{
reqParams.Add(param);
}
}
ISessionCache cache = (ISessionCache)Activator.CreateInstance(clientCredentials.Cache, clientCredentials.Config);
//Check the cache for existing session.
String id;
List <String> idSort;
id = clientCredentials.ClientCertificate.Certificate.Thumbprint + ";";
id += clientCredentials.Session.Thumbprint + ";";
idSort = new List <string>();
foreach (XmlElement reqParam in reqParams)
{
String val;
val = "{" + reqParam.GetAttribute("AttributeNamespace") + "}";
val += reqParam.GetAttribute("AttributeName");
val += "=";
val += reqParam.GetElementsByTagName("AttributeValue", "urn:oasis:names:tc:SAML:1.0:assertion")[0].InnerText;
val += ";";
idSort.Add(val);
}
idSort.Sort();
foreach (String val in idSort)
{
id += val;
}
idSort = new List <string>();
foreach (ClaimTypeRequirement req in tokenRequirement.ClaimTypeRequirements)
{
String val = req.ClaimType + ";";
idSort.Add(val);
}
idSort.Sort();
foreach (String val in idSort)
{
id += val;
}
XmlNamespaceManager nsmngr = null;
DateTime notOnOrAfter = DateTime.MinValue;
//Get the value from the cache
XmlElement assertion = cache.Get(id);
//If cache had a result, check if it is still valid
if (assertion != null)
{
nsmngr = new XmlNamespaceManager(assertion.OwnerDocument.NameTable);
nsmngr.AddNamespace("saml", "urn:oasis:names:tc:SAML:1.0:assertion");
notOnOrAfter = DateTime.Parse(assertion.SelectSingleNode("saml:Conditions/@NotOnOrAfter", nsmngr).Value, null, DateTimeStyles.RoundtripKind);
if (notOnOrAfter < DateTime.UtcNow)
{
assertion = null;
cache.Remove(id);
}
}
//If the cache wasn't successful, create new.
if (assertion == null)
{
//Get a new assertion token for the session
StsClient target = new StsClient(tokenRequirement.IssuerBinding, tokenRequirement.IssuerAddress);
target.Endpoint.Behaviors.Remove <ClientCredentials>();
target.Endpoint.Behaviors.Add(new OptClientCredentials());
target.ClientCredentials.ClientCertificate.Certificate = clientCredentials.ClientCertificate.Certificate;
target.InnerChannel.OperationTimeout = timeout;
assertion = target.RequestTicket("Anonymous", clientCredentials.Session, clientCredentials.Duration, reqParams, tokenRequirement.ClaimTypeRequirements);
nsmngr = new XmlNamespaceManager(assertion.OwnerDocument.NameTable);
nsmngr.AddNamespace("saml", "urn:oasis:names:tc:SAML:1.0:assertion");
notOnOrAfter = DateTime.Parse(assertion.SelectSingleNode("saml:Conditions/@NotOnOrAfter", nsmngr).Value, null, DateTimeStyles.RoundtripKind);
cache.Add(id, assertion, notOnOrAfter);
}
//Get some date from the assertion token
DateTime notBefore = DateTime.Parse(assertion.SelectSingleNode("saml:Conditions/@NotBefore", nsmngr).Value, null, DateTimeStyles.RoundtripKind);
String assertionId = assertion.SelectSingleNode("@AssertionID", nsmngr).Value;
// Create a KeyIdentifierClause for the SamlSecurityToken
SamlAssertionKeyIdentifierClause samlKeyIdentifierClause = new SamlAssertionKeyIdentifierClause(assertionId);
return(new GenericXmlSecurityToken(assertion, new X509SecurityToken(clientCredentials.Session), notBefore, notOnOrAfter, samlKeyIdentifierClause, samlKeyIdentifierClause, null));
}