add auth files

api/src/Controllers/AuthController.cs

@@ -0,0 +1,62 @@
+
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Authorization;
+
+using agologumApi.Models;
+using agologumApi.Services;
+
+[ApiController]
+[Route("api/[controller]")]
+public class AuthController : ControllerBase {
+
+    private readonly UserService users_;
+    private readonly JwtService jwt_;
+
+    public AuthController(UserService users, JwtService jwt)
+    {
+        users_ = users;
+        jwt_ = jwt;
+    }
+
+    [HttpPost("register")]
+    public async Task<ActionResult> Register(RegisterDto dto) {
+        var user = new User {
+            Name = dto.Username,
+            PasswordHash = BCrypt.Net.BCrypt.HashPassword(dto.Password) // TODO: hashing stage in client
+        };
+
+        var newUser = await users_.Create(user);
+        return CreatedAtAction(
+            nameof(Register),
+            new { id = newUser.Id },
+            user
+        );
+    }
+
+    [HttpPost("login")]
+    public async Task<ActionResult> Login(LoginDto dto)
+    {
+        var user = await users_.Get(dto.Username);
+
+        if (user == null || !BCrypt.Net.BCrypt.Verify(dto.Password, user.PasswordHash)) {
+            return Unauthorized();
+        }
+
+        var token = jwt_.GenerateJwt(user);
+
+        return Ok(new { token });
+    }
+
+    [Authorize] // authorize is handled by middleware
+    [HttpPost("logout")]
+    public ActionResult Logout() {
+        // dummy endpoint
+        // logout happens upon client-side jwt removal
+        return Ok();
+    }
+
+    // TODO
+    // refresh tokens
+    // email verification
+    // password reset
+}

api/src/Models/DTO.cs

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+
+public class RegisterDto {
+
+    public string Username { get; set; } = "";
+    public string Email { get; set; } = "";
+    public string Password { get; set; } = "";
+
+}
+
+public class LoginDto {
+
+    public string Username { get; set; } = "";
+    public string Password { get; set; } = "";
+
+}

api/src/Services/JwtService.cs

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+
+using Microsoft.IdentityModel.Tokens;
+using System.Text;
+using System.Security.Claims;
+using System.IdentityModel.Tokens.Jwt;
+
+using agologumApi.Models;
+
+public class JwtService {
+
+    private readonly IConfiguration config_;
+
+    public JwtService(IConfiguration config) { // why the heck does c# not have initializer lists ?
+        config_ = config;
+    }
+
+    public string? GenerateJwt(User user) {
+
+        string? jwtKey = config_["Jwt:Key"];
+        if(jwtKey == null) return null;
+        var key = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(jwtKey));
+
+        var creds = new SigningCredentials(key, SecurityAlgorithms.HmacSha256);
+
+        // not too sure
+        var claims = new[] {
+            new Claim(ClaimTypes.Name, user.Name),
+            new Claim(ClaimTypes.NameIdentifier, user.Id.ToString())
+        };
+
+        var token = new JwtSecurityToken(
+            claims: claims,
+            expires: DateTime.UtcNow.AddHours(2), // will add a refresher later
+            signingCredentials: creds
+        );
+
+        return new JwtSecurityTokenHandler().WriteToken(token);
+
+    }
+
+
+}