OpenIddict - Authorization and authentication with Microservices - authentication

Question

I have a mobile (native) and web app (SPA) that talks to backend microservices (developed in core 2.0) for authentication/authorization and other domain related functions, which has configured using Opendidict. Both apps are getting access token. What I'm struggling with is, all microservices should accept bearer access token and authentication/authorization logged in user (a central auth-service), access token generated in auth microservice (OpenIddict 2.*). So what changes I'm missing in microservices, where REST APIs are marked [Authorize]?
Code from Auth Microservice:
public void ConfigureServices(IServiceCollection services)
{
var connection = Configuration.GetConnectionString("DefaultConnection");
services.AddDbContext<IdentityDbContext>(options =>
{
options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection"));
options.UseOpenIddict();
});
services.AddAuthentication().AddOAuthValidation();
services.AddOpenIddict(options =>
{
options.AddEntityFrameworkCoreStores<IdentityDbContext>();
options.AddMvcBinders();
options.EnableTokenEndpoint("/connect/token");
// Enable the password flow.
options.AllowPasswordFlow().AllowRefreshTokenFlow();
options.SetRefreshTokenLifetime(TimeSpan.FromHours(1));
options.DisableHttpsRequirement();
});
services.AddDbContext<AuthDbContext>(options => options.UseSqlServer(connection));
services.AddScoped<IUserRepository, UserRepository>();
services.AddAuthentication(options =>
{
options.DefaultScheme = OAuthValidationDefaults.AuthenticationScheme;
});
services.AddAuthorization(options =>
{
options.AddPolicy("RequireAdministratorRole", policy => policy.RequireRole("Administrator"));
});
}
Existing code in Notification Microservice
public void ConfigureServices(IServiceCollection services)
{
services.AddDbContext<MastersDbContext>(options => options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));
services.AddAuthentication().AddOAuthValidation();
services.AddAuthentication(options =>
{
options.DefaultScheme = OAuthValidationDefaults.AuthenticationScheme;
});
services.AddAuthorization(options =>
{
options.AddPolicy("RequireAdministratorRole", policy => policy.RequireRole("Administrator"));
});
}
public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
app.UseCors(builder =>
builder.WithOrigins("*")
.AllowAnyHeader()
.AllowAnyMethod()
.AllowAnyOrigin()
);
//app.UseAntiforgeryToken();
app.UseMvc();
app.UseAuthentication();
}
Notification Controller:
// POST api/values
[HttpPost]
[Authorize]
public IActionResult Post(Notification notification)
{
//logic
return Ok();
}

Answer 1

For tokens to be correctly decrypted by all your micro-services, you need to make sure that the key ring containing the master keys (that are derived by ASP.NET Core Data Protection to create encryption and validation keys) is correctly synchronized. The procedure is described here: https://learn.microsoft.com/en-us/aspnet/core/security/data-protection/configuration/overview.
Here's an example of how it could be done using a shared folder:
public void ConfigureServices(IServiceCollection services)
{
services.AddDataProtection()
.PersistKeysToFileSystem(new DirectoryInfo(#"\\server\share\directory\"))
}
You'll also need to configure the two applications to use the same "application discriminator":
public void ConfigureServices(IServiceCollection services)
{
services.AddDataProtection()
.PersistKeysToFileSystem(new DirectoryInfo(#"\\server\share\directory\"))
.SetApplicationName("Your application name");
}