public async Task <Task> OnRemoteFailure(RemoteFailureContext context)
{
context.HandleResponse();
// Handle the error code that Azure AD B2C throws when trying to reset a password
// from the login page because password reset is not supported by a "sign-up or
// sign-in policy"
if (context.Failure is OpenIdConnectProtocolException && context.Failure.Message.Contains("AADB2C90118"))
{
// If the user clicked the reset password link, redirect to the reset password route
var authProp = new AuthenticationProperties()
{
RedirectUri = "/"
};
authProp.Items[AzureAdB2COptions.PolicyAuthenticationProperty] = azureOptions.ResetPasswordPolicyId;
await context.HttpContext.ChallengeAsync(OpenIdConnectDefaults.AuthenticationScheme, authProp);
}
else if (context.Failure is OpenIdConnectProtocolException && context.Failure.Message.Contains("access_denied"))
{
context.Response.Redirect("/");
}
else
{
context.Response.Redirect("/Home/Error");
}
return(Task.CompletedTask);
}
/// <summary>Handles the remote failure.</summary>
/// <param name="context">The context.</param>
/// <returns>A task.</returns>
/// <exception cref="ArgumentNullException"><paramref name="context"/> is <see langword="null"/>.</exception>
public static Task HandleRemoteFailure(this RemoteFailureContext context)
{
if (context == default)
{
throw new ArgumentNullException(nameof(context));
}
if (context.Properties.Items.ContainsKey(Referer))
{
context.Response.Redirect($"{context.Properties.Items[Referer]}");
}
context.HandleResponse();
return(CompletedTask);
}
public Task OnRemoteFailure(RemoteFailureContext context)
{
context.HandleResponse();
// Handle the error code that Azure AD B2C throws when trying to reset a password from the login page
// because password reset is not supported by a "sign-up or sign-in policy"
if (context.Failure is OpenIdConnectProtocolException && context.Failure.Message.Contains("AADB2C90118"))
{
// If the user clicked the reset password link, redirect to the reset password route
context.Response.Redirect("/Account/ResetPassword");
}
else if (context.Failure is OpenIdConnectProtocolException && context.Failure.Message.Contains("access_denied"))
{
context.Response.Redirect("/");
}
else
{
context.Response.Redirect("/Home/Error");
}
return(Task.CompletedTask);
}
public virtual async Task <bool> HandleRequestAsync()
{
if (!await ShouldHandleRequestAsync())
{
return(false);
}
AuthenticationTicket ticket = null;
Exception exception = null;
AuthenticationProperties properties = null;
try
{
var authResult = await HandleRemoteAuthenticateAsync();
if (authResult == null)
{
exception = new InvalidOperationException("Invalid return state, unable to redirect.");
}
else if (authResult.Handled)
{
return(true);
}
else if (authResult.Skipped || authResult.None)
{
return(false);
}
else if (!authResult.Succeeded)
{
exception = authResult.Failure ?? new InvalidOperationException("Invalid return state, unable to redirect.");
properties = authResult.Properties;
}
ticket = authResult?.Ticket;
}
catch (Exception ex)
{
exception = ex;
}
if (exception != null)
{
Logger.RemoteAuthenticationError(exception.Message);
var errorContext = new RemoteFailureContext(Context, Scheme, Options, exception)
{
Properties = properties
};
await Events.RemoteFailure(errorContext);
if (errorContext.Result != null)
{
if (errorContext.Result.Handled)
{
return(true);
}
else if (errorContext.Result.Skipped)
{
return(false);
}
else if (errorContext.Result.Failure != null)
{
throw new Exception("An error was returned from the RemoteFailure event.", errorContext.Result.Failure);
}
}
if (errorContext.Failure != null)
{
throw new Exception("An error was encountered while handling the remote login.", errorContext.Failure);
}
}
// We have a ticket if we get here
var ticketContext = new TicketReceivedContext(Context, Scheme, Options, ticket)
{
ReturnUri = ticket.Properties.RedirectUri
};
ticket.Properties.RedirectUri = null;
// Mark which provider produced this identity so we can cross-check later in HandleAuthenticateAsync
ticketContext.Properties.Items[AuthSchemeKey] = Scheme.Name;
await Events.TicketReceived(ticketContext);
if (ticketContext.Result != null)
{
if (ticketContext.Result.Handled)
{
Logger.SignInHandled();
return(true);
}
else if (ticketContext.Result.Skipped)
{
Logger.SignInSkipped();
return(false);
}
}
await Context.SignInAsync(SignInScheme, ticketContext.Principal, ticketContext.Properties);
// Default redirect path is the base path
if (string.IsNullOrEmpty(ticketContext.ReturnUri))
{
ticketContext.ReturnUri = "/";
}
Response.Redirect(ticketContext.ReturnUri);
return(true);
}
/// <summary> /// Invoked when there is a remote failure. /// </summary> public virtual Task RemoteFailure(RemoteFailureContext context) => OnRemoteFailure(context);
