Im trying Azure AD B2C and I've added Google and Microsoft Identity Providers through Azure Portal.
When i try to login with Microsoft OR Google IP, i always receive following error message in the OnAuthenticationFailed-Handler:
AADB2C99002: User does not exist. Please sign up before you can sign in.
But when i'm using the "Local Account SignIn" Provided by Azure B2C everything is working fine. Do i missing something in my configuration ?
The following code snippet shows my OWIN Configuration.
private void ConfigureAuthentication(IAppBuilder app)
{
app.SetDefaultSignInAsAuthenticationType(CookieAuthenticationDefaults.AuthenticationType);
app.UseCookieAuthentication(new CookieAuthenticationOptions());
OpenIdConnectAuthenticationOptions options = new OpenIdConnectAuthenticationOptions
{
// These are standard OpenID Connect parameters, with values pulled from web.config
ClientId = clientId,
RedirectUri = redirectUri,
PostLogoutRedirectUri = redirectUri,
Notifications = new OpenIdConnectAuthenticationNotifications
{
AuthenticationFailed = OnAuthenticationFailed,
RedirectToIdentityProvider = OnRedirectToIdentityProvider,
AuthorizationCodeReceived = OnAuthorizationCodeReceived,
SecurityTokenValidated = context => {
return null;
}
},
Scope = "openid offline_access",
// The PolicyConfigurationManager takes care of getting the correct Azure AD authentication
// endpoints from the OpenID Connect metadata endpoint. It is included in the PolicyAuthHelpers folder.
ConfigurationManager = new PolicyConfigurationManager(
String.Format(CultureInfo.InvariantCulture, aadInstance, tenant, "/v2.0", OIDCMetadataSuffix),
new string[] { SignUpPolicyId, SignInPolicyId, ProfilePolicyId }),
// This piece is optional - it is used for displaying the user's name in the navigation bar.
TokenValidationParameters = new System.IdentityModel.Tokens.TokenValidationParameters
{
NameClaimType = "name",
},
};
app.UseOpenIdConnectAuthentication(options);
}
// This notification can be used to manipulate the OIDC request before it is sent. Here we use it to send the correct policy.
private async Task OnRedirectToIdentityProvider(RedirectToIdentityProviderNotification<OpenIdConnectMessage, OpenIdConnectAuthenticationOptions> notification)
{
PolicyConfigurationManager mgr = notification.Options.ConfigurationManager as PolicyConfigurationManager;
if (notification.ProtocolMessage.RequestType == OpenIdConnectRequestType.LogoutRequest)
{
OpenIdConnectConfiguration config = await mgr.GetConfigurationByPolicyAsync(CancellationToken.None, notification.OwinContext.Authentication.AuthenticationResponseRevoke.Properties.Dictionary[AzureB2C.PolicyKey]);
notification.ProtocolMessage.IssuerAddress = config.EndSessionEndpoint;
}
else
{
OpenIdConnectConfiguration config = await mgr.GetConfigurationByPolicyAsync(CancellationToken.None, notification.OwinContext.Authentication.AuthenticationResponseChallenge.Properties.Dictionary[AzureB2C.PolicyKey]);
notification.ProtocolMessage.IssuerAddress = config.AuthorizationEndpoint;
}
}
private async Task OnAuthorizationCodeReceived(AuthorizationCodeReceivedNotification notification)
{
// The user's objectId is extracted from the claims provided in the id_token, and used to cache tokens in ADAL
// The authority is constructed by appending your B2C directory's name to "https://login.microsoftonline.com/"
// The client credential is where you provide your application secret, and is used to authenticate the application to Azure AD
string userObjectID = notification.AuthenticationTicket.Identity.FindFirst("http://schemas.microsoft.com/identity/claims/objectidentifier").Value;
string authority = String.Format(CultureInfo.InvariantCulture, aadInstance, tenant, string.Empty, string.Empty);
ClientCredential credential = new ClientCredential(clientId, clientSecret);
// We don't care which policy is used to access the TaskService, so let's use the most recent policy
string mostRecentPolicy = notification.AuthenticationTicket.Identity.FindFirst(AzureB2C.AcrClaimType).Value;
// The Authentication Context is ADAL's primary class, which represents your connection to your B2C directory
// ADAL uses an in-memory token cache by default. In this case, we've extended the default cache to use a simple per-user session cache
AuthenticationContext authContext = new AuthenticationContext(authority, new NaiveSessionCache(userObjectID));
// Here you ask for a token using the web app's clientId as the scope, since the web app and service share the same clientId.
// The token will be stored in the ADAL token cache, for use in our controllers
AuthenticationResult result = await authContext.AcquireTokenByAuthorizationCodeAsync(notification.Code, new Uri(redirectUri), credential, new string[] { clientId }, mostRecentPolicy);
}
// Used for avoiding yellow-screen-of-death
private Task OnAuthenticationFailed(AuthenticationFailedNotification<OpenIdConnectMessage, OpenIdConnectAuthenticationOptions> notification)
{
_log.Error("AuthenticationFailed!\r\nError={0}\r\nErrorDescription={1}\r\n{0}",
notification.ProtocolMessage.Error,
notification.ProtocolMessage.ErrorDescription,
notification.Exception.ToString());
notification.HandleResponse();
notification.Response.Redirect("/Home/OpenIdError?message=" + notification.ProtocolMessage.ErrorDescription);
return Task.FromResult(0);
}
}
