nano-pro/auth.php
DJP 61aa1931bb Add MSAL/Azure AD authentication with toggle support
Implemented complete Microsoft Authentication Library (MSAL) / Azure AD
Single Sign-On (SSO) system following Ferrero app pattern.

KEY FEATURE: Toggle authentication on/off via environment variable
- SSO_ENABLED=false → Mock user, no login required (local dev)
- SSO_ENABLED=true → Full Azure AD authentication (production)

NEW FILES:
- composer.json - Firebase JWT dependency
- .env.example - Environment variable template
- env_loader.php - Parse .env file
- JWTValidator.php - Validate JWT tokens from Azure AD
- AuthMiddleware.php - Core auth orchestrator with login UI
- auth.php - Authentication API (login/logout/status)
- auth-test.php - Debug authentication status
- AUTH_README.md - Complete setup documentation

UPDATED FILES:
- config.php - Load env vars, add SSO constants
- index.php - Require auth, add logout button, MSAL script
- api.php - Add authentication check
- enhance_prompt.php - Add authentication check
- .gitignore - Exclude .env and vendor/

AUTHENTICATION FLOW:
1. User visits app → Auth check
2. If SSO disabled → Mock "Local Developer" user
3. If SSO enabled → Validate JWT from cookie
4. If no token → Show MSAL login page
5. User signs in → Token validated → Cookie set → App loads

SECURITY FEATURES:
 httpOnly cookies (XSS prevention)
 SameSite=Lax (CSRF prevention)
 JWT signature validation
 Claims validation (exp, nbf, aud, iss)
 JWKS from Azure AD
 24-hour token expiration
 Secure flag for HTTPS

DEPENDENCIES INSTALLED:
- firebase/php-jwt v6.11.1

TESTING:
- Local: SSO disabled by default in .env
- Server: Set SSO_ENABLED=true with Azure AD credentials
- Cannot test MSAL locally (redirect URI bound to server)

DEPLOYMENT:
1. Install composer dependencies
2. Configure .env with Azure AD credentials
3. Set SSO_ENABLED=true when ready
4. Visit auth-test.php to verify setup

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 (1M context) <noreply@anthropic.com>
2025-12-16 10:08:07 -05:00

118 lines
2.8 KiB
PHP

<?php
/**
* Authentication API Endpoint
* Handles login, logout, and status requests
*/
header('Content-Type: application/json');
require_once __DIR__ . '/AuthMiddleware.php';
$auth = new AuthMiddleware();
// Get POST data
$input = json_decode(file_get_contents('php://input'), true);
if (!$input || !isset($input['action'])) {
http_response_code(400);
echo json_encode(['error' => 'Invalid request - action required']);
exit;
}
$action = $input['action'];
// Handle different actions
switch ($action) {
case 'login':
handleLogin($auth, $input);
break;
case 'logout':
handleLogout($auth);
break;
case 'status':
handleStatus($auth);
break;
default:
http_response_code(400);
echo json_encode(['error' => 'Unknown action: ' . $action]);
break;
}
/**
* Handle login action
*/
function handleLogin($auth, $input) {
if (!$auth->isSSOEnabled()) {
http_response_code(400);
echo json_encode(['error' => 'SSO is disabled']);
return;
}
// Prefer ID token for validation, fallback to access token
$token = $input['idToken'] ?? $input['accessToken'] ?? null;
if (!$token) {
http_response_code(400);
echo json_encode(['error' => 'Authentication token is required']);
return;
}
// Validate and set token
$result = $auth->setAuthToken($token);
if ($result['success']) {
echo json_encode([
'success' => true,
'message' => 'Authentication successful',
'user' => [
'name' => $result['user']['name'] ?? 'Unknown',
'email' => $result['user']['preferred_username'] ?? $result['user']['upn'] ?? 'Unknown'
]
]);
} else {
http_response_code(401);
echo json_encode([
'success' => false,
'error' => $result['error']
]);
}
}
/**
* Handle logout action
*/
function handleLogout($auth) {
$auth->clearAuthToken();
echo json_encode([
'success' => true,
'message' => 'Logged out successfully'
]);
}
/**
* Handle status check action
*/
function handleStatus($auth) {
$authStatus = $auth->isAuthenticated();
if ($authStatus['authenticated']) {
echo json_encode([
'authenticated' => true,
'sso_enabled' => $auth->isSSOEnabled(),
'user' => [
'name' => $authStatus['user']['name'] ?? 'Unknown',
'email' => $authStatus['user']['preferred_username'] ?? $authStatus['user']['upn'] ?? 'Unknown'
]
]);
} else {
http_response_code(401);
echo json_encode([
'authenticated' => false,
'sso_enabled' => $auth->isSSOEnabled(),
'error' => $authStatus['error'] ?? 'Not authenticated'
]);
}
}