Added basic infrastructure for JWT authentication

1 files changed, 46 insertions, 0 deletions

diff --git a/Controllers/ApiLoginController.cs b/Controllers/ApiLoginController.cs
new file mode 100644
index 0000000..fdf9bae
--- /dev/null
+++ b/Controllers/ApiLoginController.cs
@@ -0,0 +1,46 @@
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.IdentityModel.Tokens;
+using System.IdentityModel.Tokens.Jwt;
+using System.Security.Claims;
+using System.Security.Cryptography;
+
+namespace HyperBooru.Controllers;
+
+[ApiController]
+[Route("/api/auth")]
+public class ApiLoginController : Controller {
+    private readonly RSA rsa;
+
+    public ApiLoginController(RSA rsa) =>
+        this.rsa = rsa;
+
+    [HttpPost]
+    public IActionResult Login([FromBody] LoginRequest request) {
+        var claims = new[] {
+            new Claim(ClaimTypes.Name, request.Username),
+            // TODO: Populate with the user's actual GUID
+            new Claim("uid", Guid.Empty.ToString().ToLower()),
+            new Claim("nsfw", request.NsfwClaim.ToString().ToLower())
+        };
+
+        var creds = new SigningCredentials(
+            new RsaSecurityKey(rsa),
+            SecurityAlgorithms.RsaSha256);
+
+        var token = new JwtSecurityToken(
+            claims: claims,
+            expires: DateTime.UtcNow.AddDays(30),
+            signingCredentials: creds);
+
+        var jwt = new JwtSecurityTokenHandler().WriteToken(token);
+
+        return Ok(new { token = jwt });
+    }
+
+    public record LoginRequest {
+        public required string Username { get; set; }
+        public required string Password { get; set; }
+
+        public bool NsfwClaim { get; set; } = false;
+    }
+}