/// <summary>
/// Decrypts an assertion we received from "fælles-offentlige brugerstyring".
/// </summary>
private static void DecryptFOBSAssertion(string file)
{
string assertionBase64 = File.ReadAllText(file);
byte[] assertionBytes = Convert.FromBase64String(assertionBase64);
XmlDocument doc = new XmlDocument();
doc.PreserveWhitespace = true;
doc.Load( new MemoryStream(assertionBytes) );
XmlNodeList encryptedList =
doc.GetElementsByTagName(EncryptedAssertion.ELEMENT_NAME, Saml20Constants.ASSERTION);
Assert.That(encryptedList.Count == 1);
// Do some mock configuration.
FederationConfig config = FederationConfig.GetConfig();
config.AllowedAudienceUris.Audiences.Add("https://saml.safewhere.net");
SAML20FederationConfig descr = ConfigurationReader.GetConfig<SAML20FederationConfig>();
descr.Endpoints.metadataLocation = @"Saml20\Protocol\MetadataDocs\FOBS"; // Set it manually.
Assert.That(Directory.Exists(descr.Endpoints.metadataLocation));
descr.Endpoints.Refresh();
X509Certificate2 cert = new X509Certificate2(@"Saml20\Certificates\SafewhereTest_SFS.pfx", "test1234");
Saml20EncryptedAssertion encass =
new Saml20EncryptedAssertion((RSA) cert.PrivateKey);
encass.LoadXml((XmlElement) encryptedList[0]);
encass.Decrypt();
// Retrieve metadata
Saml20Assertion assertion = new Saml20Assertion(encass.Assertion.DocumentElement, null, false);
IDPEndPoint endp = descr.FindEndPoint(assertion.Issuer);
Assert.IsNotNull(endp, "Endpoint not found");
Assert.IsNotNull(endp.metadata, "Metadata not found");
try
{
assertion.CheckValid(AssertionUtil.GetTrustedSigners(assertion.Issuer));
Assert.Fail("Verification should fail. Token does not include its signing key.");
} catch(InvalidOperationException)
{}
Assert.IsNull(assertion.SigningKey, "Signing key is already present on assertion. Modify test.");
Assert.That(assertion.CheckSignature(Saml20SignonHandler.GetTrustedSigners(endp.metadata.GetKeys(KeyTypes.signing), endp)));
Assert.IsNotNull(assertion.SigningKey, "Signing key was not set on assertion instance.");
}
public void DecryptPingAssertion()
{
// Load the assertion
XmlDocument doc = new XmlDocument();
doc.Load(File.OpenRead(@"c:\tmp\pingassertion.txt"));
XmlElement xe = GetElement(EncryptedAssertion.ELEMENT_NAME, Saml20Constants.ASSERTION, doc);
XmlDocument doc2 = new XmlDocument();
doc2.AppendChild(doc2.ImportNode(xe, true));
X509Store store = new X509Store(StoreName.My, StoreLocation.LocalMachine);
store.Open(OpenFlags.ReadOnly);
X509Certificate2Collection coll = store.Certificates.Find(X509FindType.FindBySubjectDistinguishedName,
"CN=SafewhereTest_SFS, O=Safewhere, C=DK", true);
Assert.That(coll.Count == 1);
X509Certificate2 cert = coll[0];
Saml20EncryptedAssertion encass = new Saml20EncryptedAssertion((RSA)cert.PrivateKey, doc2);
encass.Decrypt();
XmlTextWriter writer = new XmlTextWriter(Console.Out);
writer.Formatting = Formatting.Indented;
writer.Indentation = 3;
writer.IndentChar = ' ';
encass.Assertion.WriteTo(writer);
writer.Flush();
Saml20Assertion assertion = new Saml20Assertion(encass.Assertion.DocumentElement, AssertionUtil.GetTrustedSigners(encass.Assertion.Attributes["Issuer"].Value), false);
Assert.That(encass.Assertion != null);
Console.WriteLine();
foreach (SamlAttribute attribute in assertion.Attributes)
Console.WriteLine(attribute.Name + " : " + attribute.AttributeValue[0]);
}
/// <summary>
/// Performs the attribute query against the specified IdP endpoint and adds the resulting attributes to Saml20Identity.Current.
/// </summary>
/// <param name="context">The http context.</param>
/// <param name="endPoint">The IdP to perform the query against.</param>
/// <param name="nameIdFormat">The nameid format.</param>
public void PerformQuery(HttpContext context, IDPEndPoint endPoint, string nameIdFormat)
{
Trace.TraceMethodCalled(GetType(), "PerformQuery()");
HttpSOAPBindingBuilder builder = new HttpSOAPBindingBuilder(context);
NameID name = new NameID();
name.Value = Saml20Identity.Current.Name;
name.Format = nameIdFormat;
_attrQuery.Subject.Items = new object[] { name };
_attrQuery.SamlAttribute = _attributes.ToArray();
XmlDocument query = new XmlDocument();
query.XmlResolver = null;
query.LoadXml(Serialization.SerializeToXmlString(_attrQuery));
var signingCertificate = FederationConfig.GetConfig().SigningCertificate.GetCertificate();
var shaHashingAlgorithm = SignatureProviderFactory.ValidateShaHashingAlgorithm(endPoint.ShaHashingAlgorithm);
var signatureProvider = SignatureProviderFactory.CreateFromShaHashingAlgorithmName(shaHashingAlgorithm);
signatureProvider.SignAssertion(query, ID, signingCertificate);
if (query.FirstChild is XmlDeclaration)
{
query.RemoveChild(query.FirstChild);
}
Stream s;
if (Trace.ShouldTrace(TraceEventType.Information))
{
Trace.TraceData(TraceEventType.Information, string.Format(Tracing.SendAttrQuery, endPoint.metadata.GetAttributeQueryEndpointLocation(), query.OuterXml));
}
try
{
s = builder.GetResponse(endPoint.metadata.GetAttributeQueryEndpointLocation(), query.OuterXml,
endPoint.AttributeQuery);
}
catch (Exception e)
{
Trace.TraceData(TraceEventType.Error, e.ToString());
throw;
}
HttpSOAPBindingParser parser = new HttpSOAPBindingParser(s);
Status status = parser.GetStatus();
if (status.StatusCode.Value != Saml20Constants.StatusCodes.Success)
{
Trace.TraceData(TraceEventType.Error,
string.Format(Tracing.AttrQueryStatusError, Serialization.SerializeToXmlString(status)));
throw new Saml20Exception(status.StatusMessage);
}
bool isEncrypted;
XmlElement xmlAssertion = Saml20SignonHandler.GetAssertion(parser.SamlMessage, out isEncrypted);
if (isEncrypted)
{
Saml20EncryptedAssertion ass =
new Saml20EncryptedAssertion(
(RSA)FederationConfig.GetConfig().SigningCertificate.GetCertificate().PrivateKey);
ass.LoadXml(xmlAssertion);
ass.Decrypt();
xmlAssertion = ass.Assertion.DocumentElement;
}
Saml20Assertion assertion =
new Saml20Assertion(xmlAssertion, null,
AssertionProfile.Core, endPoint.QuirksMode);
assertion.Validate(DateTime.UtcNow);
if (Trace.ShouldTrace(TraceEventType.Information))
{
Trace.TraceData(TraceEventType.Information, string.Format(Tracing.AttrQueryAssertion, xmlAssertion == null ? string.Empty : xmlAssertion.OuterXml));
}
IEnumerable <string> validationFailures;
if (!assertion.CheckSignature(Saml20SignonHandler.GetTrustedSigners(endPoint.metadata.Keys, endPoint, out validationFailures)))
{
Trace.TraceData(TraceEventType.Error, Resources.SignatureInvalid);
throw new Saml20Exception(Resources.SignatureInvalid);
}
foreach (SamlAttribute attr in assertion.Attributes)
{
Saml20Identity.Current.AddAttributeFromQuery(attr.Name, attr);
}
}
private static Saml20Assertion CreateDKSaml20TokenFromAssertion(Saml20EncryptedAssertion encAss)
{
return new Saml20Assertion(encAss.Assertion.DocumentElement, null, false);
}
public void TestAssertionEncryption()
{
Saml20EncryptedAssertion encryptedAssertion = new Saml20EncryptedAssertion();
encryptedAssertion.Assertion = AssertionUtil.GetTestAssertion_01();
X509Certificate2 cert = new X509Certificate2(@"Saml20\Certificates\sts_dev_certificate.pfx", "test1234");
encryptedAssertion.TransportKey = (RSA) cert.PublicKey.Key;
encryptedAssertion.Encrypt();
XmlDocument encryptedAssertionXML = encryptedAssertion.GetXml();
Assert.IsNotNull(encryptedAssertionXML);
// A number of simple tests until we get some better way to verify the generated encrypted assertion.
XmlNodeList list;
list = encryptedAssertionXML.GetElementsByTagName(EncryptedAssertion.ELEMENT_NAME, Saml20Constants.ASSERTION);
Assert.AreEqual(1, list.Count);
list = encryptedAssertionXML.GetElementsByTagName(dk.nita.saml20.Schema.XEnc.EncryptedKey.ELEMENT_NAME, Saml20Constants.XENC);
Assert.AreEqual(1, list.Count);
}
public void TestAssertionDecryption_05()
{
// Load the assertion
XmlDocument doc = new XmlDocument();
doc.Load(File.OpenRead(@"Saml20\Assertions\EncryptedAssertion_05"));
// Find the transport key.
X509Certificate2 cert = new X509Certificate2(@"Saml20\Certificates\sts_dev_certificate.pfx", "test1234");
Saml20EncryptedAssertion encryptedAssertion = new Saml20EncryptedAssertion((RSA)cert.PrivateKey, doc);
Assert.IsNull(encryptedAssertion.Assertion); // Check that it does not contain an assertion prior to decryption.
encryptedAssertion.Decrypt();
Assert.IsNotNull(encryptedAssertion.Assertion);
XmlNodeList list;
// Perform some rudimentary tests on the output.
list = encryptedAssertion.Assertion.GetElementsByTagName(Assertion.ELEMENT_NAME, Saml20Constants.ASSERTION);
Assert.AreEqual(1, list.Count);
}
public void TestAssertionDecryption_03()
{
// Load the assertion
XmlDocument doc = new XmlDocument();
doc.Load(File.OpenRead(@"Saml20\Assertions\EncryptedAssertion_03"));
// Find the transport key.
X509Certificate2 cert = new X509Certificate2(@"Saml20\Certificates\sts_dev_certificate.pfx", "test1234");
Saml20EncryptedAssertion encryptedAssertion = new Saml20EncryptedAssertion((RSA)cert.PrivateKey, doc);
Assert.IsNull(encryptedAssertion.Assertion); // Check that it does not contain an assertion prior to decryption.
encryptedAssertion.Decrypt();
Assert.IsNotNull(encryptedAssertion.Assertion);
}
public void TestAlgorithmConfiguration_02()
{
Saml20EncryptedAssertion encryptedAssertion = new Saml20EncryptedAssertion();
encryptedAssertion.SessionKeyAlgorithm = EncryptedXml.XmlEncAES128Url;
encryptedAssertion.Assertion = AssertionUtil.GetTestAssertion_01();
X509Certificate2 cert = new X509Certificate2(@"Saml20\Certificates\sts_dev_certificate.pfx", "test1234");
encryptedAssertion.TransportKey = (RSA)cert.PublicKey.Key;
encryptedAssertion.Encrypt();
XmlDocument encryptedAssertionXML = encryptedAssertion.GetXml();
Assert.IsNotNull(encryptedAssertionXML);
// Verify that the EncryptionMethod element is set correctly.
XmlNodeList list =
encryptedAssertionXML.GetElementsByTagName(dk.nita.saml20.Schema.XEnc.EncryptedData.ELEMENT_NAME,
Saml20Constants.XENC);
Assert.AreEqual(1, list.Count);
XmlElement el = (XmlElement) list[0];
// Go through the children and look for the EncryptionMethod element, and verify its algorithm attribute.
bool encryptionMethodFound = false;
foreach (XmlNode node in el.ChildNodes)
{
if (node.LocalName == dk.nita.saml20.Schema.XEnc.EncryptionMethod.ELEMENT_NAME &&
node.NamespaceURI == Saml20Constants.XENC)
{
el = (XmlElement) node;
Assert.AreEqual(EncryptedXml.XmlEncAES128Url, el.GetAttribute("Algorithm"));
encryptionMethodFound = true;
}
}
Assert.That(encryptionMethodFound, "Unable to find EncryptionMethod element in EncryptedData.");
// Now decrypt the assertion, and verify that it recognizes the Algorithm used.
Saml20EncryptedAssertion decrypter = new Saml20EncryptedAssertion((RSA) cert.PrivateKey);
Assert.IsNull(decrypter.Assertion);
decrypter.LoadXml(encryptedAssertionXML.DocumentElement);
// Set a wrong algorithm and make sure that the class gets it algorithm info from the assertion itself.
decrypter.SessionKeyAlgorithm = EncryptedXml.XmlEncTripleDESUrl;
decrypter.Decrypt();
// Verify that the class has discovered the correct algorithm and set the SessionKeyAlgorithm property accordingly.
Assert.AreEqual(EncryptedXml.XmlEncAES128Url, decrypter.SessionKeyAlgorithm);
Assert.IsNotNull(decrypter.Assertion);
}
public void TestAlgorithmConfiguration_01()
{
Saml20EncryptedAssertion encryptedAssertion = new Saml20EncryptedAssertion();
encryptedAssertion.SessionKeyAlgorithm = "RSA";
Assert.Fail("\"Saml20EncryptedAssertion\" class does not respond to incorrect algorithm identifying URI.");
}
/// <summary>
/// Performs the attribute query against the specified IdP endpoint and adds the resulting attributes to Saml20Identity.Current.
/// </summary>
/// <param name="context">The http context.</param>
/// <param name="endPoint">The IdP to perform the query against.</param>
/// <param name="nameIdFormat">The nameid format.</param>
public void PerformQuery(HttpContext context, IDPEndPoint endPoint, string nameIdFormat)
{
Trace.TraceMethodCalled(GetType(), "PerformQuery()");
HttpSOAPBindingBuilder builder = new HttpSOAPBindingBuilder(context);
NameID name = new NameID();
name.Value = Saml20Identity.Current.Name;
name.Format = nameIdFormat;
_attrQuery.Subject.Items = new object[] { name };
_attrQuery.SamlAttribute = _attributes.ToArray();
XmlDocument query = new XmlDocument();
query.LoadXml(Serialization.SerializeToXmlString(_attrQuery));
XmlSignatureUtils.SignDocument(query, ID);
if(query.FirstChild is XmlDeclaration)
query.RemoveChild(query.FirstChild);
Stream s;
if (Trace.ShouldTrace(TraceEventType.Information))
Trace.TraceData(TraceEventType.Information, string.Format(Tracing.SendAttrQuery, endPoint.metadata.GetAttributeQueryEndpointLocation(), query.OuterXml));
try
{
s = builder.GetResponse(endPoint.metadata.GetAttributeQueryEndpointLocation(), query.OuterXml,
endPoint.AttributeQuery);
}catch(Exception e)
{
Trace.TraceData(TraceEventType.Error, e.ToString());
throw;
}
HttpSOAPBindingParser parser = new HttpSOAPBindingParser(s);
Status status = parser.GetStatus();
if (status.StatusCode.Value != Saml20Constants.StatusCodes.Success)
{
Trace.TraceData(TraceEventType.Error,
string.Format(Tracing.AttrQueryStatusError, Serialization.SerializeToXmlString(status)));
throw new Saml20Exception(status.StatusMessage);
}
bool isEncrypted;
XmlElement xmlAssertion = Saml20SignonHandler.GetAssertion(parser.SamlMessage, out isEncrypted);
if (isEncrypted)
{
Saml20EncryptedAssertion ass =
new Saml20EncryptedAssertion(
(RSA) FederationConfig.GetConfig().SigningCertificate.GetCertificate().PrivateKey);
ass.LoadXml(xmlAssertion);
ass.Decrypt();
xmlAssertion = ass.Assertion.DocumentElement;
}
Saml20Assertion assertion =
new Saml20Assertion(xmlAssertion, null,
AssertionProfile.Core, endPoint.QuirksMode);
if(Trace.ShouldTrace(TraceEventType.Information))
{
Trace.TraceData(TraceEventType.Information, string.Format(Tracing.AttrQueryAssertion, xmlAssertion == null ? string.Empty : xmlAssertion.OuterXml));
}
if(!assertion.CheckSignature(Saml20SignonHandler.GetTrustedSigners(endPoint.metadata.Keys, endPoint))){
Trace.TraceData(TraceEventType.Error, Resources.SignatureInvalid);
throw new Saml20Exception(Resources.SignatureInvalid);
}
foreach (SamlAttribute attr in assertion.Attributes)
{
Saml20Identity.Current.AddAttributeFromQuery(attr.Name, attr);
}
}
