Sign Up/In Not Working In ASP. NET Core Application: Azure B2C

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1 Sign Up/In not working in ASP. NET Core application: Azure B2C

Problem Description:

We configured user flow with Google as identity provider. Followed the Azure-Sample repository on GitHub in building one ASP.NET Core webapp with .NET6.

appsettings.json:-

"AzureAdB2C": {
    "Instance": "https://b2ctenant.b2clogin.com",
    "ClientId": "3ae27e38-90a3-43c7-9bac-8d3bf33227f9",
    "Domain": "b2ctenant.b2clogin.com",
    "SignedOutCallbackPath": "/signout/B2C_1_susi",
    "SignUpSignInPolicyId": "b2c_1_susi",
    "ResetPasswordPolicyId": "b2c_1_reset",
    "EditProfilePolicyId": "b2c_1_edit_profile" // Optional profile editing policy
    //"CallbackPath": "/signin/B2C_1_sign_up_in"  // defaults to /signin-oidc

https://localhost:44316

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Getting exception when users select Sign Up/In option

IOException: IDX20807: Unable to retrieve document from: ‘[PII of type ‘System.String’ is hidden. For more details, see
https://aka.ms/IdentityModel/PII.]’. HttpResponseMessage: ‘[PII of
type ‘System.Net.Http.HttpResponseMessage’ is hidden. For more
details, see https://aka.ms/IdentityModel/PII.]’,
HttpResponseMessage.Content: ‘[PII of type ‘System.String’ is hidden.
For more details, see https://aka.ms/IdentityModel/PII.]’.
Microsoft.IdentityModel.Protocols.HttpDocumentRetriever.GetDocumentAsync(string
address, CancellationToken cancel)
Microsoft.IdentityModel.Protocols.OpenIdConnect.OpenIdConnectConfigurationRetriever.GetAsync(string
address, IDocumentRetriever retriever, CancellationToken cancel)
Microsoft.IdentityModel.Protocols.ConfigurationManager.GetConfigurationAsync(CancellationToken
cancel)
nvalidOperationException: IDX20803: Unable to obtain configuration from: ‘[PII of type ‘System.String’ is hidden. For more
details, see https://aka.ms/IdentityModel/PII.]’.
Microsoft.IdentityModel.Protocols.ConfigurationManager.GetConfigurationAsync(CancellationToken
cancel)
Microsoft.AspNetCore.Authentication.OpenIdConnect.OpenIdConnectHandler.HandleChallengeAsyncInternal(AuthenticationProperties
properties)
Microsoft.AspNetCore.Authentication.OpenIdConnect.OpenIdConnectHandler.HandleChallengeAsync(AuthenticationProperties
properties)
Microsoft.AspNetCore.Authentication.AuthenticationHandler.ChallengeAsync(AuthenticationProperties
properties)
Microsoft.AspNetCore.Authentication.AuthenticationService.ChallengeAsync(HttpContext
context, string scheme, AuthenticationProperties properties)
Microsoft.AspNetCore.Mvc.ChallengeResult.ExecuteResultAsync(ActionContext
context)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Awaited|30_0<TFilter,
TFilterAsync>(ResourceInvoker invoker, Task lastTask, State next,
Scope scope, object state, bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResultExecutedContextSealed
context)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.ResultNext<TFilter,
TFilterAsync>(ref State next, ref Scope scope, ref object state, ref
bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Awaited|28_0(ResourceInvoker
invoker, Task lastTask, State next, Scope scope, object state, bool
isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Awaited|25_0(ResourceInvoker
invoker, Task lastTask, State next, Scope scope, object state, bool
isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed
context)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(ref State
next, ref Scope scope, ref object state, ref bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Awaited|20_0(ResourceInvoker
invoker, Task lastTask, State next, Scope scope, object state, bool
isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Logged|17_1(ResourceInvoker
invoker)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Logged|17_1(ResourceInvoker
invoker)
Microsoft.AspNetCore.Routing.EndpointMiddleware.g__AwaitRequestTask|6_0(Endpoint
endpoint, Task requestTask, ILogger logger)
Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext
context)
Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext
context)
Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddlewareImpl.Invoke(HttpContext
context)

Solution – 1

I tried to reproduce the same in my environment and got below results:

I registered one application and granted API permissions like below:

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I cloned the same GitHub sample and updated appsettings.json file same as you like below:

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I ran the above sample and got below screen:

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When I clicked on Sign Up/In button, I got same error as you like below:

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Note that, you are giving wrong value to your Domain parameter in your appsettings.json file. You need to change value of Domain parameter that can be found here:

enter image description here

To resolve the error, I changed value of Domain parameter in my
appsettings.json file like below:

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When I clicked on Sign Up/In button now by running the sample, I got the login screen with Google successfully like below:

enter image description here

Reference: Configure authentication using Azure Active Directory B2C | Microsoft

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