aliasvault/src/AliasVault.Api/Controllers/AuthController.cs

namespace AliasVault.Api.Controllers;

using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Mvc;
using Microsoft.IdentityModel.Tokens;
using System.IdentityModel.Tokens.Jwt;
using System.Security.Claims;
using System.Text;

[Route("api/[controller]")]
[ApiController]
public class AuthController : ControllerBase
{
    private readonly UserManager<IdentityUser> _userManager;
    private readonly SignInManager<IdentityUser> _signInManager;
    private readonly IConfiguration _configuration;

    public AuthController(UserManager<IdentityUser> userManager, SignInManager<IdentityUser> signInManager, IConfiguration configuration)
    {
        _userManager = userManager;
        _signInManager = signInManager;
        _configuration = configuration;
    }

    [HttpPost("login")]
    public async Task<IActionResult> Login([FromBody] LoginModel model)
    {
        var user = await _userManager.FindByEmailAsync(model.Email);
        if (user != null && await _userManager.CheckPasswordAsync(user, model.Password))
        {
            var token = GenerateJwtToken(user);
            return Ok(new { token });
        }
        return Unauthorized();
    }

    private string GenerateJwtToken(IdentityUser user)
    {
        var claims = new[]
        {
            new Claim(JwtRegisteredClaimNames.Sub, user.UserName),
            new Claim(JwtRegisteredClaimNames.Jti, Guid.NewGuid().ToString())
        };

        var key = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(_configuration["Jwt:Key"]));
        var creds = new SigningCredentials(key, SecurityAlgorithms.HmacSha256);

        var token = new JwtSecurityToken(
            issuer: _configuration["Jwt:Issuer"],
            audience: _configuration["Jwt:Issuer"],
            claims: claims,
            expires: DateTime.Now.AddMinutes(30),
            signingCredentials: creds);

        return new JwtSecurityTokenHandler().WriteToken(token);
    }
}

public class LoginModel
{
    public string Email { get; set; }
    public string Password { get; set; }
}