/// <summary>
/// Adds the specified AuthnRequest to the collection of previously
/// sent requests, maintaining the imposed limit as defined by
/// MaximumRequestsStored. This collection is represented as a
/// queue and is attached to the user's session.
/// </summary>
/// <param name="context">
/// HttpContext containing session, request, and response objects.
/// </param>
/// <param name="authnRequest">AuthnRequest to add to the collection.</param>
internal static void AddSentAuthnRequest(HttpContextBase context, AuthnRequest authnRequest)
{
Queue authnRequests = GetSentAuthnRequests(context);
if (authnRequests == null)
{
authnRequests = new Queue(MaximumRequestsStored);
}
if (authnRequests.Count == MaximumRequestsStored)
{
authnRequests.Dequeue();
}
authnRequests.Enqueue(authnRequest);
context.Session[AuthnRequestSessionAttribute] = authnRequests;
ILogger logger = LoggerFactory.GetLogger(typeof(AuthnRequestCache));
if (logger.IsInfoEnabled)
{
var message = new StringBuilder();
message.AppendLine("AuthnRequestsCache:");
foreach (AuthnRequest a in authnRequests)
{
message.AppendLine(a.Id);
}
logger.Info(message.ToString());
}
}
/// <summary>
/// Adds the specified AuthnRequest to the collection of previously
/// sent requests, maintaining the imposed limit as defined by
/// MaximumRequestsStored. This collection is represented as a
/// queue and is attached to the user's session.
/// </summary>
/// <param name="context">
/// HttpContext containing session, request, and response objects.
/// </param>
/// <param name="authnRequest">AuthnRequest to add to the collection.</param>
internal static void AddSentAuthnRequest(HttpContext context, AuthnRequest authnRequest)
{
Queue authnRequests = AuthnRequestCache.GetSentAuthnRequests(context);
if (authnRequests == null)
{
authnRequests = new Queue(AuthnRequestCache.MaximumRequestsStored);
}
if (authnRequests.Count == AuthnRequestCache.MaximumRequestsStored)
{
authnRequests.Dequeue();
}
authnRequests.Enqueue(authnRequest);
context.Session[AuthnRequestCache.AuthnRequestSessionAttribute] = authnRequests;
StringBuilder message = new StringBuilder();
message.Append("AuthnRequestsCache:\r\n");
IEnumerator i = authnRequests.GetEnumerator();
while (i.MoveNext())
{
AuthnRequest a = (AuthnRequest)i.Current;
message.Append(a.Id + "\r\n");
}
FedletLogger.Info(message.ToString());
}
/// <summary>
/// Removes the AuthnRequest from the collection of previously
/// sent requests based on the provided AuthnRequest.Id value.
/// This collection is represented as a queue and is attached to
/// the user's session.
/// </summary>
/// <param name="context">
/// HttpContext containing session, request, and response objects.
/// </param>
/// <param name="authnRequestId">
/// ID of the AuthnRequest to be removed from the cache.
/// </param>
internal static void RemoveSentAuthnRequest(HttpContext context, string authnRequestId)
{
Queue originalCache = AuthnRequestCache.GetSentAuthnRequests(context);
if (originalCache != null)
{
Queue revisedCache = new Queue();
while (originalCache.Count > 0)
{
AuthnRequest temp = (AuthnRequest)originalCache.Dequeue();
if (temp.Id != authnRequestId)
{
revisedCache.Enqueue(temp);
}
}
context.Session[AuthnRequestCache.AuthnRequestSessionAttribute] = revisedCache;
}
}
/// <summary>
/// Sends an AuthnRequest to the specified IDP with the given
/// parameters.
/// </summary>
/// <param name="context">
/// HttpContext containing session, request, and response objects.
/// </param>
/// <param name="idpEntityId">Entity ID of the IDP.</param>
/// <param name="parameters">
/// NameValueCollection of varying parameters for use in the
/// construction of the AuthnRequest.
/// </param>
public void SendAuthnRequest(HttpContext context, string idpEntityId, NameValueCollection parameters)
{
IdentityProvider idp = (IdentityProvider)this.IdentityProviders[idpEntityId];
if (idp == null)
{
throw new ServiceProviderUtilityException(Resources.ServiceProviderUtilityIdentityProviderNotFound);
}
if (parameters == null)
{
parameters = new NameValueCollection();
}
AuthnRequest authnRequest = new AuthnRequest(idp, this.ServiceProvider, parameters);
XmlDocument xmlDoc = (XmlDocument)authnRequest.XmlDom;
StringBuilder logMessage = new StringBuilder();
logMessage.Append("AuthnRequest:\r\n").Append(xmlDoc.OuterXml);
FedletLogger.Info(logMessage.ToString());
// Add this AuthnRequest for this user for validation on AuthnResponse
AuthnRequestCache.AddSentAuthnRequest(context, authnRequest);
// Send with Redirect or Post based on the 'reqBinding' parameter.
if (parameters[Saml2Constants.RequestBinding] == Saml2Constants.HttpPostProtocolBinding)
{
string postHtml = this.GetAuthnRequestPostHtml(authnRequest, idpEntityId, parameters);
context.Response.Write(postHtml);
context.Response.End();
}
else
{
string redirectUrl = this.GetAuthnRequestRedirectLocation(authnRequest, idpEntityId, parameters);
context.Response.Redirect(redirectUrl.ToString(), true);
}
}
/// <summary>
/// Gets the AuthnRequest location along with querystring parameters
/// to be used for actual browser requests.
/// </summary>
/// <param name="authnRequest">
/// AuthnRequest to packaged for a redirect.
/// </param>
/// <param name="idpEntityId">Entity ID of the IDP.</param>
/// <param name="parameters">
/// NameVallueCollection of additional parameters.
/// </param>
/// <returns>
/// URL with query string parameter for the specified IDP.
/// </returns>
public string GetAuthnRequestRedirectLocation(AuthnRequest authnRequest, string idpEntityId, NameValueCollection parameters)
{
if (authnRequest == null)
{
throw new ServiceProviderUtilityException(Resources.AuthnRequestIsNull);
}
IdentityProvider idp = (IdentityProvider)this.IdentityProviders[idpEntityId];
if (idp == null)
{
throw new ServiceProviderUtilityException(Resources.ServiceProviderUtilityIdentityProviderNotFound);
}
string ssoRedirectLocation = idp.GetSingleSignOnServiceLocation(Saml2Constants.HttpRedirectProtocolBinding);
if (ssoRedirectLocation == null)
{
throw new ServiceProviderUtilityException(Resources.ServiceProviderUtilityIdpSingleSignOnSvcLocNotDefined);
}
string packagedAuthnRequest = Saml2Utils.CompressConvertToBase64UrlEncode(authnRequest.XmlDom);
string queryString = Saml2Constants.RequestParameter + "=" + packagedAuthnRequest;
if (parameters != null && !string.IsNullOrEmpty(parameters[Saml2Constants.RelayState]))
{
string relayState = parameters[Saml2Constants.RelayState];
Saml2Utils.ValidateRelayState(relayState, this.ServiceProvider.RelayStateUrlList);
queryString += "&" + Saml2Constants.RelayState;
queryString += "=" + HttpUtility.UrlEncode(relayState);
}
if (this.ServiceProvider.AuthnRequestsSigned || idp.WantAuthnRequestsSigned)
{
if (string.IsNullOrEmpty(this.ServiceProvider.SigningCertificateAlias))
{
throw new ServiceProviderUtilityException(Resources.ServiceProviderUtilitySignFailedNoCertAlias);
}
else
{
queryString += "&" + Saml2Constants.SignatureAlgorithm;
queryString += "=" + HttpUtility.UrlEncode(Saml2Constants.SignatureAlgorithmRsa);
queryString = Saml2Utils.SignQueryString(this.ServiceProvider.SigningCertificateAlias, queryString);
}
}
StringBuilder redirectUrl = new StringBuilder();
redirectUrl.Append(ssoRedirectLocation);
redirectUrl.Append(Saml2Utils.GetQueryStringDelimiter(ssoRedirectLocation));
redirectUrl.Append(queryString);
FedletLogger.Info("AuthnRequest via Redirect:\r\n" + redirectUrl);
return redirectUrl.ToString();
}
/// <summary>
/// Gets the HTML for use of submitting the AuthnRequest with POST.
/// </summary>
/// <param name="authnRequest">
/// AuthnRequest to packaged for a POST.
/// </param>
/// <param name="idpEntityId">Entity ID of the IDP.</param>
/// <param name="parameters">
/// NameVallueCollection of additional parameters.
/// </param>
/// <returns>
/// HTML with auto-form submission with POST of the AuthnRequest
/// </returns>
public string GetAuthnRequestPostHtml(AuthnRequest authnRequest, string idpEntityId, NameValueCollection parameters)
{
if (authnRequest == null)
{
throw new ServiceProviderUtilityException(Resources.AuthnRequestIsNull);
}
IdentityProvider idp = (IdentityProvider)this.IdentityProviders[idpEntityId];
if (idp == null)
{
throw new ServiceProviderUtilityException(Resources.ServiceProviderUtilityIdentityProviderNotFound);
}
string ssoPostLocation = idp.GetSingleSignOnServiceLocation(Saml2Constants.HttpPostProtocolBinding);
if (ssoPostLocation == null)
{
throw new ServiceProviderUtilityException(Resources.ServiceProviderUtilityIdpSingleSignOnSvcLocNotDefined);
}
string relayState = null;
if (parameters != null && !string.IsNullOrEmpty(parameters[Saml2Constants.RelayState]))
{
relayState = parameters[Saml2Constants.RelayState];
Saml2Utils.ValidateRelayState(relayState, this.ServiceProvider.RelayStateUrlList);
}
XmlDocument authnRequestXml = (XmlDocument)authnRequest.XmlDom;
if (this.ServiceProvider.AuthnRequestsSigned || idp.WantAuthnRequestsSigned)
{
if (string.IsNullOrEmpty(this.ServiceProvider.SigningCertificateAlias))
{
throw new ServiceProviderUtilityException(Resources.ServiceProviderUtilitySignFailedNoCertAlias);
}
else
{
Saml2Utils.SignXml(
this.ServiceProvider.SigningCertificateAlias,
authnRequestXml,
authnRequest.Id,
true);
FedletLogger.Info("Signed AuthnRequest:\r\n" + authnRequestXml.InnerXml);
}
}
string packagedAuthnRequest = Saml2Utils.ConvertToBase64(authnRequestXml.InnerXml);
string inputFieldFormat = "<input type=\"hidden\" name=\"{0}\" value=\"{1}\" />";
StringBuilder html = new StringBuilder();
html.Append("<html><head><title>OpenSSO - SP initiated SSO</title></head>");
html.Append("<body onload=\"document.forms[0].submit();\">");
html.Append("<form method=\"post\" action=\"");
html.Append(ssoPostLocation);
html.Append("\">");
html.Append("<input type=\"hidden\" name=\"");
html.Append(Saml2Constants.RequestParameter);
html.Append("\" value=\"");
html.Append(packagedAuthnRequest);
html.Append("\" />");
if (!string.IsNullOrEmpty(relayState))
{
html.Append(string.Format(
CultureInfo.InvariantCulture,
inputFieldFormat,
Saml2Constants.RelayState,
HttpUtility.HtmlEncode(relayState)));
}
html.Append("</form>");
html.Append("</body>");
html.Append("</html>");
return html.ToString();
}
/// <summary>
/// Sends an AuthnRequest to the specified IDP with the given
/// parameters.
/// </summary>
/// <param name="context">
/// HttpContext containing session, request, and response objects.
/// </param>
/// <param name="idpEntityId">Entity ID of the IDP.</param>
/// <param name="parameters">
/// NameValueCollection of varying parameters for use in the
/// construction of the AuthnRequest.
/// </param>
public void SendAuthnRequest(HttpContextBase context, string idpEntityId, NameValueCollection parameters)
{
IIdentityProvider idp;
if (!IdentityProviders.TryGetValue(idpEntityId, out idp))
{
throw new ServiceProviderUtilityException(Resources.ServiceProviderUtilityIdentityProviderNotFound);
}
if (parameters == null)
{
parameters = new NameValueCollection();
}
var authnRequest = new AuthnRequest(idp, ServiceProvider, parameters, _saml2Utils);
var xmlDoc = (XmlDocument) authnRequest.XmlDom;
_logger.Info("AuthnRequest:\r\n{0}", xmlDoc.OuterXml);
// Add this AuthnRequest for this user for validation on AuthnResponse
//AuthnRequestCache.AddSentAuthnRequest(context, authnRequest);
// Send with Redirect or Post based on the 'reqBinding' parameter.
if (parameters[Saml2Constants.RequestBinding] == Saml2Constants.HttpPostProtocolBinding)
{
string postHtml = GetAuthnRequestPostHtml(authnRequest, idpEntityId, parameters);
context.Response.Write(postHtml);
context.Response.End();
}
else
{
string redirectUrl = GetAuthnRequestRedirectLocation(authnRequest, idpEntityId, parameters);
context.Response.Redirect(redirectUrl, true);
}
}
