/// <summary>
/// Get valid issuers from app settings.
/// </summary>
/// <param name="configuration">Application settings.</param>
/// <returns>Returns valid issuers from app settings.</returns>
private static IEnumerable <string> GetValidIssuers(IConfiguration configuration)
{
var tenantId = configuration[AuthenticationServiceCollectionExtensions.TenantIdConfigurationSettingsKey];
var validIssuers =
AuthenticationServiceCollectionExtensions.GetSettings(
configuration,
AuthenticationServiceCollectionExtensions.ValidIssuersConfigurationSettingsKey);
validIssuers = validIssuers.Select(validIssuer => validIssuer.Replace("TENANT_ID", tenantId, StringComparison.OrdinalIgnoreCase));
return(validIssuers);
}
// This method works specifically for single tenant application.
private static void RegisterAuthenticationServices(
IServiceCollection services,
IConfiguration configuration)
{
AuthenticationServiceCollectionExtensions.ValidateAuthenticationConfigurationSettings(configuration);
services.AddAuthentication(options => { options.DefaultScheme = JwtBearerDefaults.AuthenticationScheme; })
.AddJwtBearer(options =>
{
var azureADOptions = new AzureADOptions();
configuration.Bind("AzureAd", azureADOptions);
options.Authority = $"{azureADOptions.Instance}{azureADOptions.TenantId}/v2.0";
options.TokenValidationParameters = new TokenValidationParameters
{
ValidAudiences = AuthenticationServiceCollectionExtensions.GetValidAudiences(configuration),
ValidIssuers = AuthenticationServiceCollectionExtensions.GetValidIssuers(configuration),
AudienceValidator = AuthenticationServiceCollectionExtensions.AudienceValidator,
};
});
}