private void WriteResponse(HttpContext context, string destination, ResponseType responseSAML, string relayState)
{
try
{
// That UrlEncode should be used to encode only un-trusted values used within URLs such
// as in query string values. If the URL itself is the source of un-trusted input, then
// input validation with regular expressions should be used.
// Fonte: Microsoft Anti-Cross Site Scripting Library V1.5 - User Guide, p-10.
Regex regex = new Regex(@"^(ht|f)tp(s?)\:\/\/[0-9a-zA-Z]([-.\w]*[0-9a-zA-Z])*(:(0-9)*)*(\/?)([a-zA-Z0-9\-\.\?\,\'\/\\\+=&%\$#_]*)?$", RegexOptions.IgnoreCase);
if (!regex.IsMatch(destination))
{
throw new ValidationException("A url contém um valor de entrada possivelmente perigoso, que pode indicar uma tentativa de comprometer a segurança do aplicativo.");
}
string samlResponse = SAMLUtility.SerializeToXmlString(responseSAML);
samlResponse = HttpUtility.UrlEncode(samlResponse);
string data = string.Format("SAMLResponse={0}&RelayState={1}", samlResponse, relayState);
retorno.UrlRedirect = destination;
retorno.UrlRedirectParam = data;
UtilBO.MessageJSON(context.Response.Output, retorno);
}
catch
{
throw;
}
}
private void CreateSAMLResponse()
{
FormsIdentity id = null;
if (HttpContext.Current.User != null)
{
if (HttpContext.Current.User.Identity.IsAuthenticated)
{
if (HttpContext.Current.User.Identity is FormsIdentity)
{
id = (FormsIdentity)HttpContext.Current.User.Identity;
}
}
}
DateTime notBefore = (id != null ? id.Ticket.IssueDate.ToUniversalTime() : DateTime.UtcNow);
DateTime notOnOrAfter = (id != null ? id.Ticket.Expiration.ToUniversalTime() : DateTime.UtcNow.AddMinutes(30));
IDProvider config = IDProvider.GetConfig();
SAMLResponse.Status = new StatusType();
SAMLResponse.Status.StatusCode = new StatusCodeType();
SAMLResponse.Status.StatusCode.Value = SAMLUtility.StatusCodes.Success;
AssertionType assert = new AssertionType();
assert.ID = SAMLUtility.GenerateID();
assert.IssueInstant = DateTime.UtcNow.AddMinutes(10);
assert.Issuer = new NameIDType();
assert.Issuer.Value = config.id;
SubjectConfirmationType subjectConfirmation = new SubjectConfirmationType();
subjectConfirmation.Method = "urn:oasis:names:tc:SAML:2.0:cm:bearer";
subjectConfirmation.SubjectConfirmationData = new SubjectConfirmationDataType();
subjectConfirmation.SubjectConfirmationData.Recipient = SAMLRequest.Issuer;
subjectConfirmation.SubjectConfirmationData.InResponseTo = SAMLRequest.Request.ID;
subjectConfirmation.SubjectConfirmationData.NotOnOrAfter = notOnOrAfter;
NameIDType nameID = new NameIDType();
nameID.Format = SAMLUtility.NameIdentifierFormats.Transient;
nameID.Value = (id != null ? id.Name : UtilBO.FormatNameFormsAuthentication(this.__SessionWEB.__UsuarioWEB.Usuario));
assert.Subject = new SubjectType();
assert.Subject.Items = new object[] { subjectConfirmation, nameID };
assert.Conditions = new ConditionsType();
assert.Conditions.NotBefore = notBefore;
assert.Conditions.NotOnOrAfter = notOnOrAfter;
assert.Conditions.NotBeforeSpecified = true;
assert.Conditions.NotOnOrAfterSpecified = true;
AudienceRestrictionType audienceRestriction = new AudienceRestrictionType();
audienceRestriction.Audience = new string[] { SAMLRequest.Issuer };
assert.Conditions.Items = new ConditionAbstractType[] { audienceRestriction };
AuthnStatementType authnStatement = new AuthnStatementType();
authnStatement.AuthnInstant = DateTime.UtcNow;
authnStatement.SessionIndex = SAMLUtility.GenerateID();
authnStatement.AuthnContext = new AuthnContextType();
authnStatement.AuthnContext.Items =
new object[] { "urn:oasis:names:tc:SAML:2.0:ac:classes:PasswordProtectedTransport" };
authnStatement.AuthnContext.ItemsElementName =
new ItemsChoiceType5[] { ItemsChoiceType5.AuthnContextClassRef };
StatementAbstractType[] statementAbstract = new StatementAbstractType[] { authnStatement };
assert.Items = statementAbstract;
SAMLResponse.Items = new object[] { assert };
string xmlResponse = SAMLUtility.SerializeToXmlString(SAMLResponse);
XmlDocument doc = new XmlDocument();
doc.LoadXml(xmlResponse);
XmlSignatureUtils.SignDocument(doc, assert.ID);
SAMLResponse = SAMLUtility.DeserializeFromXmlString <ResponseType>(doc.InnerXml);
HttpPostBinding binding = new HttpPostBinding(SAMLResponse, HttpUtility.UrlDecode(Request[HttpBindingConstants.RelayState]));
binding.SendResponse(this.Context, HttpUtility.UrlDecode(SAMLRequest.AssertionConsumerServiceURL), SAMLTypeSSO.signon);
}
