Access Identity Password Options after Configure Services

Question

In the ConfigureServices startup method, during configuration of the Identity service, the password rules can be configured using code as follows:

services.Configure<IdentityOptions>(options =>
{
    options.Password.RequireDigit = false;
    options.Password.RequireLowercase = false;
    options.Password.RequireNonAlphanumeric = false;
    options.Password.RequireUppercase = false;
    options.Password.RequiredLength = 6;
    options.Password.RequiredUniqueChars = 2;
});

Where options.Password is an Identity object called PasswordOptions. Please note my security is so lax merely to make working on the Register action a little smoother without having to deal repetitively with complex passwords.

Now in my register page, I would like to have a GeneratePassword method that takes a PasswordOptions instance as input and generates a password conforming to those options. I would like that object to have the same values as I used setting the password options in ConfigureServices.

Is there any way to access these option values? So far the only solution I have is to store the password options in my appsettings.json, as a serialized PasswordOptions and use the Options pattern to inject a PasswordOptions into my Register page's PageModel. However, I may not wish to store the options in the config file, and would like to access them later just as they are hard-coded in ConfigureServices.

Answer 1

You can just request an instance of IOptions<IdentityOptions> from DI in your method and then access it using something like the following:

public class RegisterModel : PageModel
{
    private readonly IdentityOptions identityOptions;

    public RegisterModel(IOptions<IdentityOptions> identityOptions)
    {
        this.identityOptions = identityOptions.Value;
    }

    public void OnGet()
    {
        identityOptions.Password.RequireDigit; // etc
    }
}