protected override async Task <bool> HandleUnauthorizedAsync(ChallengeContext context)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
var properties = new AuthenticationProperties(context.Properties);
if (string.IsNullOrEmpty(properties.RedirectUri))
{
properties.RedirectUri = CurrentUri;
}
// OAuth2 10.12 CSRF
GenerateCorrelationId(properties);
var returnTo = BuildReturnTo(Options.StateDataFormat.Protect(properties));
var authorizationEndpoint = $"{Options.CasServerUrlBase}/login?service={Uri.EscapeDataString(returnTo)}";
var redirectContext = new CasRedirectToAuthorizationEndpointContext(
Context, Options,
properties, authorizationEndpoint);
await Options.Events.RedirectToAuthorizationEndpoint(redirectContext);
return(true);
}
/// <summary> /// Called when a Challenge causes a redirect to authorize endpoint in the Cas middleware /// </summary> /// <param name="context">Contains redirect URI and <see cref="AuthenticationProperties"/> of the challenge </param> public virtual Task RedirectToAuthorizationEndpoint(CasRedirectToAuthorizationEndpointContext context) => OnRedirectToAuthorizationEndpoint(context);
