feat(api): update AuthController for encrypted login

NEW/src/JdeScoping.Api/Controllers/AuthController.cs

@@ -1,8 +1,9 @@
 using System.Security.Claims;
+using System.Text.Json;
 using JdeScoping.Api.Extensions;
-using JdeScoping.Api.Models;
 using JdeScoping.Core.Interfaces;
 using JdeScoping.Core.Models;
+using JdeScoping.Core.Models.Auth;
 using Microsoft.AspNetCore.Authentication;
 using Microsoft.AspNetCore.Authentication.Cookies;
 using Microsoft.AspNetCore.Authorization;
@@ -20,37 +21,66 @@ namespace JdeScoping.Api.Controllers;
 public class AuthController : ApiControllerBase
 {
     private readonly IAuthService _authService;
+    private readonly IRsaKeyService _rsaKeyService;
     private readonly ILogger<AuthController> _logger;
 
     public AuthController(
         IAuthService authService,
+        IRsaKeyService rsaKeyService,
         ILogger<AuthController> logger)
     {
         _authService = authService;
+        _rsaKeyService = rsaKeyService;
         _logger = logger;
     }
 
     /// <summary>
-    /// Authenticates a user and creates a session cookie
+    /// Gets the server's RSA public key for encrypting login credentials.
     /// </summary>
-    /// <param name="request">Login credentials</param>
+    [HttpGet("public-key")]
+    [AllowAnonymous]
+    [ProducesResponseType(typeof(PublicKeyResponse), StatusCodes.Status200OK)]
+    public ActionResult<PublicKeyResponse> GetPublicKey()
+    {
+        var publicKeyPem = _rsaKeyService.GetPublicKeyPem();
+        return Ok(new PublicKeyResponse(publicKeyPem));
+    }
+
+    /// <summary>
+    /// Authenticates a user with encrypted credentials and creates a session cookie.
+    /// </summary>
+    /// <param name="request">Encrypted login credentials</param>
     /// <param name="ct">Cancellation token</param>
-    /// <returns>User info on success, 401 on failure</returns>
+    /// <returns>Login result with user info on success</returns>
     [HttpPost("login")]
     [AllowAnonymous]
-    [ProducesResponseType(typeof(UserInfo), StatusCodes.Status200OK)]
-    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
-    public async Task<ActionResult<UserInfo>> Login(
-        [FromBody] LoginRequest request,
+    [ProducesResponseType(typeof(LoginResultModel), StatusCodes.Status200OK)]
+    [ProducesResponseType(typeof(LoginResultModel), StatusCodes.Status401Unauthorized)]
+    public async Task<ActionResult<LoginResultModel>> Login(
+        [FromBody] EncryptedLoginRequest request,
         CancellationToken ct)
     {
+        LoginModel loginModel;
+        try
+        {
+            var ciphertext = Convert.FromBase64String(request.EncryptedData);
+            var plaintext = _rsaKeyService.Decrypt(ciphertext);
+            loginModel = JsonSerializer.Deserialize<LoginModel>(plaintext)
+                ?? throw new InvalidOperationException("Deserialization returned null");
+        }
+        catch (Exception ex)
+        {
+            _logger.LogWarning(ex, "Failed to decrypt login request");
+            return BadRequest(new LoginResultModel(false, "Invalid encrypted payload", null));
+        }
+
         var result = await _authService.AuthenticateAsync(
-            request.Username, request.Password, ct);
+            loginModel.Username, loginModel.Password, ct);
 
         if (!result.Success)
         {
-            _logger.LogWarning("Failed login attempt for user {Username}", request.Username);
-            return Unauthorized(new { message = result.ErrorMessage });
+            _logger.LogWarning("Failed login attempt for user {Username}", loginModel.Username);
+            return Unauthorized(new LoginResultModel(false, result.ErrorMessage, null));
         }
 
         // Sign out existing session
@@ -66,8 +96,8 @@ public class AuthController : ApiControllerBase
             principal,
             new AuthenticationProperties { IsPersistent = false });
 
-        _logger.LogInformation("User {Username} logged in successfully", request.Username);
-        return Ok(result.User);
+        _logger.LogInformation("User {Username} logged in successfully", loginModel.Username);
+        return Ok(new LoginResultModel(true, null, result.User));
     }
 
     /// <summary>

NEW/src/JdeScoping.Api/Models/LoginRequest.cs

@@ -1,21 +0,0 @@
-using System.ComponentModel.DataAnnotations;
-
-namespace JdeScoping.Api.Models;
-
-/// <summary>
-/// Login request payload
-/// </summary>
-public class LoginRequest
-{
-    /// <summary>
-    /// Username for authentication
-    /// </summary>
-    [Required(ErrorMessage = "Username is required")]
-    public string Username { get; set; } = string.Empty;
-
-    /// <summary>
-    /// Password for authentication
-    /// </summary>
-    [Required(ErrorMessage = "Password is required")]
-    public string Password { get; set; } = string.Empty;
-}