protected override Task ApplyResponseChallengeAsync()
{
if (Response.StatusCode != 401)
{
return(Task.FromResult <object>(null));
}
AuthenticationResponseChallenge challenge = Helper.LookupChallenge(Options.AuthenticationType, Options.AuthenticationMode);
if (challenge != null)
{
string requestPrefix = Request.Scheme + Uri.SchemeDelimiter + Request.Host;
var state = challenge.Properties;
if (String.IsNullOrEmpty(state.RedirectUri))
{
state.RedirectUri = requestPrefix + Request.PathBase + Request.Path + Request.QueryString;
}
// Anti-CSRF
GenerateCorrelationId(state);
string returnTo = BuildReturnTo(Options.StateDataFormat.Protect(state));
string authorizationEndpoint =
"https://www.google.com/accounts/o8/ud" +
"?openid.ns=" + Uri.EscapeDataString("http://specs.openid.net/auth/2.0") +
"&openid.ns.ax=" + Uri.EscapeDataString("http://openid.net/srv/ax/1.0") +
"&openid.mode=" + Uri.EscapeDataString("checkid_setup") +
"&openid.claimed_id=" + Uri.EscapeDataString("http://specs.openid.net/auth/2.0/identifier_select") +
"&openid.identity=" + Uri.EscapeDataString("http://specs.openid.net/auth/2.0/identifier_select") +
"&openid.return_to=" + Uri.EscapeDataString(returnTo) +
"&openid.realm=" + Uri.EscapeDataString(requestPrefix) +
"&openid.ax.mode=" + Uri.EscapeDataString("fetch_request") +
"&openid.ax.type.email=" + Uri.EscapeDataString("http://axschema.org/contact/email") +
"&openid.ax.type.name=" + Uri.EscapeDataString("http://axschema.org/namePerson") +
"&openid.ax.type.first=" + Uri.EscapeDataString("http://axschema.org/namePerson/first") +
"&openid.ax.type.last=" + Uri.EscapeDataString("http://axschema.org/namePerson/last") +
"&openid.ax.required=" + Uri.EscapeDataString("email,name,first,last");
var redirectContext = new GoogleApplyRedirectContext(
Context, Options,
state, authorizationEndpoint);
Options.Provider.ApplyRedirect(redirectContext);
}
return(Task.FromResult <object>(null));
}
/// <summary>
/// Called when a Challenge causes a redirect to authorize endpoint in the Google OpenID middleware
/// </summary>
/// <param name="context">Contains redirect URI and <see cref="AuthenticationProperties"/> of the challenge </param>
public virtual void ApplyRedirect(GoogleApplyRedirectContext context)
{
OnApplyRedirect(context);
}