Controllers/LoginController.cs


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using HyperBooru.Services;
using Microsoft.AspNetCore.Authentication;
using Microsoft.AspNetCore.Authentication.Cookies;
using Microsoft.AspNetCore.Cryptography.KeyDerivation;
using Microsoft.AspNetCore.Mvc;
using System.Security.Claims;

namespace HyperBooru.Controllers;

[ApiController]
[Route("/")]
public class LoginController : Controller {
    private IHttpContextAccessor httpContextAccessor;

    public LoginController(IHttpContextAccessor httpContextAccessor) =>
        this.httpContextAccessor = httpContextAccessor;

    [HttpPost("Login")]
    public async Task<IActionResult> Login(
        [FromForm] string username,
        [FromForm] string password,
        HBContext db) {

        var user = db.Users.FirstOrDefault(u => u.Username == username);
        if(user is null)
            return StatusCode(403);

        var hash = UserService.HashPassword(password);
        if(hash != user.PasswordHash)
            return StatusCode(403);

        var claims = new Claim[] {
            new Claim(ClaimTypes.Name, user.Username),
            new Claim("ObjectId", user.ObjectId.ToString())
        };

        var claimsIdentity = new ClaimsIdentity(
            claims,
            CookieAuthenticationDefaults.AuthenticationScheme);

        var claimsPrincipal = new ClaimsPrincipal(claimsIdentity);

        await httpContextAccessor.HttpContext!.SignInAsync(claimsPrincipal);
        return Ok();
    }

    [HttpPost("Logout")]
    public async Task Logout() =>
        await httpContextAccessor.HttpContext!.SignOutAsync();
}