/// <summary>
/// GetPostSamlResponse - Returns a Base64 Encoded String with the SamlResponse in it.
/// </summary>
/// <param name="recipient">Recipient</param>
/// <param name="issuer">Issuer</param>
/// <param name="subject">Subject</param>
/// <param name="certLocation">Certificate Location</param>
/// <param name="certPassword">Certificate Password</param>
/// <param name="attributes">A list of attributes to pass</param>
/// <returns>A base64Encoded string with a SAML response.</returns>
public static string GetPostSamlResponse(string recipient, string issuer, string domain, string subject,
StoreLocation storeLocation, StoreName storeName, X509FindType findType, string certFile, string certPassword, object findValue,
Dictionary<string, string> attributes)
{
ResponseType response = new ResponseType();
// Response Main Area
response.ID = "_" + Guid.NewGuid().ToString();
response.Destination = recipient;
response.Version = "2.0";
response.IssueInstant = System.DateTime.UtcNow;
NameIDType issuerForResponse = new NameIDType();
issuerForResponse.Value = issuer.Trim();
response.Issuer = issuerForResponse;
StatusType status = new StatusType();
status.StatusCode = new StatusCodeType();
status.StatusCode.Value = "urn:oasis:names:tc:SAML:2.0:status:Success";
response.Status = status;
XmlSerializer responseSerializer =
new XmlSerializer(response.GetType());
StringWriter stringWriter = new StringWriter();
XmlWriterSettings settings = new XmlWriterSettings();
settings.OmitXmlDeclaration = true;
settings.Indent = true;
settings.Encoding = Encoding.UTF8;
XmlWriter responseWriter = XmlTextWriter.Create(stringWriter, settings);
string samlString = string.Empty;
AssertionType assertionType = SamlHelper.CreateSamlAssertion(
issuer.Trim(), recipient.Trim(), domain.Trim(), subject.Trim(), attributes);
response.Items = new AssertionType[] { assertionType };
responseSerializer.Serialize(responseWriter, response);
responseWriter.Close();
samlString = stringWriter.ToString();
samlString = samlString.Replace("SubjectConfirmationData",
string.Format("SubjectConfirmationData NotOnOrAfter=\"{0:o}\" Recipient=\"{1}\"",
DateTime.UtcNow.AddMinutes(5), recipient));
stringWriter.Close();
XmlDocument doc = new XmlDocument();
doc.LoadXml(samlString);
X509Certificate2 cert = null;
if (System.IO.File.Exists(certFile))
{
cert = new X509Certificate2(certFile, certPassword);
}
else
{
X509Store store = new X509Store(storeName, storeLocation);
store.Open(OpenFlags.ReadOnly);
X509Certificate2Collection coll = store.Certificates.Find(findType, findValue, true);
if (coll.Count < 1)
{
throw new ArgumentException("Unable to locate certificate");
}
cert = coll[0];
store.Close();
}
XmlElement signature = SigningHelper.SignDoc(
doc, cert, "ID", response.ID);
doc.DocumentElement.InsertBefore(signature,
doc.DocumentElement.ChildNodes[1]);
/*if (SamlHelper.Logger.IsDebugEnabled)
{
SamlHelper.Logger.DebugFormat(
"Saml Assertion before encoding = {0}",
doc.OuterXml.ToString());
}*/
string responseStr = doc.OuterXml;
byte[] base64EncodedBytes =
Encoding.UTF8.GetBytes(responseStr);
string returnValue = System.Convert.ToBase64String(
base64EncodedBytes);
return returnValue;
}
/// <summary>
/// Creates a Version 2.0 Saml Assertion
/// </summary>
/// <param name="issuer">Issuer</param>shibboleth.massivedynamic.net
/// <param name="subject">Subject</param>massivedynamic.net
/// <param name="attributes">Attributes</param>Principle,P
/// <returns>returns a Version 2.0 Saml Assertoion</returns>
private static AssertionType CreateSamlAssertion(string issuer, string recipient, string domain, string subject, Dictionary<string, string> attributes)
{
// Here we create some SAML assertion with ID and Issuer name.
AssertionType assertion = new AssertionType();
assertion.ID = "_" + Guid.NewGuid().ToString();
NameIDType issuerForAssertion = new NameIDType();
issuerForAssertion.Value = issuer.Trim();
assertion.Issuer = issuerForAssertion;
assertion.Version = "2.0";
assertion.IssueInstant = System.DateTime.UtcNow;
//Not before, not after conditions
ConditionsType conditions = new ConditionsType();
conditions.NotBefore = DateTime.UtcNow;
conditions.NotBeforeSpecified = true;
conditions.NotOnOrAfter = DateTime.UtcNow.AddMinutes(5);
conditions.NotOnOrAfterSpecified = true;
AudienceRestrictionType audienceRestriction = new AudienceRestrictionType();
audienceRestriction.Audience = new string[] { domain.Trim() };
conditions.Items = new ConditionAbstractType[] { audienceRestriction };
//Name Identifier to be used in Saml Subject
NameIDType nameIdentifier = new NameIDType();
nameIdentifier.NameQualifier = domain.Trim();
nameIdentifier.Value = subject.Trim();
SubjectConfirmationType subjectConfirmation = new SubjectConfirmationType();
SubjectConfirmationDataType subjectConfirmationData = new SubjectConfirmationDataType();
subjectConfirmation.Method = "urn:oasis:names:tc:SAML:2.0:cm:bearer";
subjectConfirmation.SubjectConfirmationData = subjectConfirmationData;
//
// Create some SAML subject.
SubjectType samlSubject = new SubjectType();
AttributeStatementType attrStatement = new AttributeStatementType();
AuthnStatementType authStatement = new AuthnStatementType();
authStatement.AuthnInstant = DateTime.UtcNow;
AuthnContextType context = new AuthnContextType();
context.ItemsElementName = new ItemsChoiceType5[] { ItemsChoiceType5.AuthnContextClassRef };
context.Items = new object[] { "AuthnContextClassRef" };
authStatement.AuthnContext = context;
samlSubject.Items = new object[] { nameIdentifier, subjectConfirmation };
assertion.Subject = samlSubject;
IPHostEntry ipEntry =
Dns.GetHostEntry(System.Environment.MachineName);
SubjectLocalityType subjectLocality = new SubjectLocalityType();
subjectLocality.Address = ipEntry.AddressList[0].ToString();
attrStatement.Items = new AttributeType[attributes.Count];
int i = 0;
// Create userName SAML attributes.
foreach (KeyValuePair<string, string> attribute in attributes)
{
AttributeType attr = new AttributeType();
attr.Name = attribute.Key;
attr.NameFormat = "urn:oasis:names:tc:SAML:2.0:attrname-format:basic";
attr.AttributeValue = new object[] { attribute.Value };
attrStatement.Items[i] = attr;
i++;
}
assertion.Conditions = conditions;
assertion.Items = new StatementAbstractType[] { authStatement, attrStatement };
return assertion;
}
