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;
}
// CSRF
GenerateCorrelationId(properties);
var state = Options.StateDataFormat.Protect(properties);
var service = BuildRedirectUri($"{Options.CallbackPath}?state={Uri.EscapeDataString(state)}");
var authorizationEndpoint = $"{Options.CasServerUrlBase}/login?service={Uri.EscapeDataString(service)}";
var redirectContext = new CasRedirectToAuthorizationEndpointContext(
Context, Options,
properties, authorizationEndpoint);
await Options.Events.RedirectToAuthorizationEndpoint(redirectContext);
return(true);
}
public virtual Task RedirectToAuthorizationEndpoint(CasRedirectToAuthorizationEndpointContext context) => OnRedirectToAuthorizationEndpoint(context);
