I couldn't find any good documentation on this, however I had to achieve the same thing so I coded the rest api myself by modifying the actions in the standard ASP.NET authentication template to REST API equivalents.
For example here is how I worked the login action:
// POST: /Account/Login
[HttpPost("[action]")]
[AllowAnonymous]
public async Task<ReturnValue<ApplicationUser>> Login([FromBody] loginModel login)
{
if (ModelState.IsValid)
{
ApplicationUser user = await _userManager.FindByEmailAsync(login.email);
if (user == null)
{
return new ReturnValue<ApplicationUser>(false, "Login failed, check username and password.", null);
}
// else if (user.EmailConfirmed == false)
// {
// return new ReturnValue<ApplicationUser>(true, "Confirm email address.", null, user);
// }
else
{
// This doesn't count login failures towards account lockout
// To enable password failures to trigger account lockout, set lockoutOnFailure: true
var result = await _signInManager.PasswordSignInAsync(user, login.password, (bool)login.rememberMe, lockoutOnFailure: false);
if (result.Succeeded)
{
return new ReturnValue<ApplicationUser>(true, user);
}
//if (result.RequiresTwoFactor)
//{
// return RedirectToAction(nameof(SendCode), new { ReturnUrl = returnUrl, RememberMe = model.RememberMe });
//}
if (result.IsLockedOut)
{
return new ReturnValue<ApplicationUser>(false, "The account is locked out.", null);
}
}
}
else
{
string message = string.Join("; ", ModelState.Values.SelectMany(x => x.Errors).Select(x => x.ErrorMessage));
return new ReturnValue<ApplicationUser>(false, "Invalid login attempt: " + message, null);
}
// If we got this far, something failed in the model.
return new ReturnValue<ApplicationUser>(false, "Login failed.", null);
}
If you call the API from a javascript within a browser the cookies will be loaded and you should be able to make further authorised calls to the API, if you're calling from another type of client, you will want to ensure the CookieContainer is retained for authorized calls.
From this point you can authorize your REST API controllers using [Authorize] decorator through the standard Microsoft libraries: https://learn.microsoft.com/en-us/aspnet/core/security/authentication/identity
Good luck.
