/// <summary>
/// Creates an artifact for the LogoutRequest and redirects the user to the IdP.
/// </summary>
/// <param name="destination">The destination of the request.</param>
/// <param name="request">The logout request.</param>
/// <param name="relayState">The query string relay state value (relayState) to add to the communication</param>
public void RedirectFromLogout(IdentityProviderEndpoint destination, Saml20LogoutRequest request, string relayState, Action<string, object> cacheInsert)
{
var index = (short)config.ServiceProvider.Endpoints.DefaultLogoutEndpoint.Index;
var doc = request.GetXml();
XmlSignatureUtils.SignDocument(doc, request.Request.Id, config.ServiceProvider.SigningCertificate);
ArtifactRedirect(destination, index, doc, relayState, cacheInsert);
}
/// <summary>
/// Initializes a new instance of the <see cref="HttpPostBindingBuilder"/> class.
/// </summary>
/// <param name="endpoint">The IdP endpoint that messages will be sent to.</param>
public HttpPostBindingBuilder(IdentityProviderEndpoint endpoint)
{
_destinationEndpoint = endpoint;
Action = SamlActionType.SAMLRequest;
RelayState = string.Empty;
}
/// <summary>
/// Handles all artifact creations and redirects.
/// </summary>
/// <param name="destination">The destination.</param>
/// <param name="localEndpointIndex">Index of the local endpoint.</param>
/// <param name="signedSamlMessage">The signed SAML message.</param>
/// <param name="relayState">The query string relay state value to add to the communication</param>
private void ArtifactRedirect(IdentityProviderEndpoint destination, short localEndpointIndex, XmlDocument signedSamlMessage, string relayState, Action<string, object> cacheInsert)
{
Logger.DebugFormat(TraceMessages.ArtifactRedirectReceived, signedSamlMessage.OuterXml);
var sourceId = config.ServiceProvider.Id;
var sourceIdHash = ArtifactUtil.GenerateSourceIdHash(sourceId);
var messageHandle = ArtifactUtil.GenerateMessageHandle();
var artifact = ArtifactUtil.CreateArtifact(HttpArtifactBindingConstants.ArtifactTypeCode, localEndpointIndex, sourceIdHash, messageHandle);
cacheInsert(artifact, signedSamlMessage);
var destinationUrl = destination.Url + (destination.Url.Contains("?") ? "&" : "?") + HttpArtifactBindingConstants.ArtifactQueryStringName + "=" + Uri.EscapeDataString(artifact);
if (!string.IsNullOrEmpty(relayState))
{
destinationUrl += "&relayState=" + relayState;
}
Logger.DebugFormat(TraceMessages.ArtifactCreated, artifact);
redirect(destinationUrl);
}
/// <summary>
/// Determine which endpoint to use based on the protocol defaults, configuration data and metadata.
/// </summary>
/// <param name="defaultBinding">The binding to use if none has been specified in the configuration and the metadata allows all bindings.</param>
/// <param name="config">The endpoint as described in the configuration. May be null.</param>
/// <param name="metadata">A list of endpoints of the given type (e.g. SSO or SLO) that the metadata contains.</param>
/// <returns>The <see cref="IdentityProvider"/>.</returns>
public static IdentityProviderEndpoint DetermineEndpointConfiguration(BindingType defaultBinding, IdentityProviderEndpoint config, List<IdentityProviderEndpoint> metadata)
{
var result = new IdentityProviderEndpoint { Binding = defaultBinding };
// Determine which binding to use.
if (config != null) {
result.Binding = config.Binding;
} else {
// Verify that the metadata allows the default binding.
var allowed = metadata.Exists(el => el.Binding == defaultBinding);
if (!allowed) {
result.Binding = result.Binding == BindingType.Post
? BindingType.Redirect
: BindingType.Post;
}
}
if (config != null && !string.IsNullOrEmpty(config.Url)) {
result.Url = config.Url;
} else {
var endpoint = metadata.Find(el => el.Binding == result.Binding);
if (endpoint == null) {
throw new FormatException(string.Format("No IdentityProvider supporting SAML binding {0} found in metadata", result.Binding));
}
result.Url = endpoint.Url;
}
return result;
}
