.htaccess
9 months ago
GoogleAuthenticator.php
9 months ago
index.html
9 months ago
web.config
9 months ago
GoogleAuthenticator.php
165 lines
| 1 | <?php |
| 2 | |
| 3 | namespace JetBackup\MFA; |
| 4 | |
| 5 | use Exception; |
| 6 | use JetBackup\Wordpress\Helper; |
| 7 | use JetBackup\Wordpress\Wordpress; |
| 8 | use SimpleThenticator\SimpleAuthenticator; |
| 9 | |
| 10 | if (!defined('__JETBACKUP__')) die('Direct access is not allowed'); |
| 11 | |
| 12 | class GoogleAuthenticator { |
| 13 | |
| 14 | const MFA_KEY = 'jetbackup_mfa_google_authenticator'; |
| 15 | const MFA_COOKIE_KEY = 'jetbackup_mfa_auth'; |
| 16 | const MFA_SETUP_COMPLETED = 'jetbackup_mfa_setup_completed'; |
| 17 | |
| 18 | const MFA_MAX_ATTEMPTS = 10; |
| 19 | const MFA_MAX_ATTEMPTS_KEY = 'jetbackup_mfa_max_attempts'; |
| 20 | |
| 21 | private static ?SimpleAuthenticator $authenticator = null; |
| 22 | |
| 23 | private static function getAuthenticator(): SimpleAuthenticator { |
| 24 | if (self::$authenticator === null) { |
| 25 | self::$authenticator = new SimpleAuthenticator(); |
| 26 | } |
| 27 | return self::$authenticator; |
| 28 | } |
| 29 | |
| 30 | /** |
| 31 | * Create a secret and store it for the given user ID. |
| 32 | * |
| 33 | * @throws Exception |
| 34 | */ |
| 35 | public static function createSecret(): string { |
| 36 | |
| 37 | $userId = Helper::getUserId(); |
| 38 | $secret = self::getAuthenticator()::createSecret(); |
| 39 | if (!Wordpress::updateUserMeta($userId, self::MFA_KEY, $secret, '')) { |
| 40 | throw new Exception('Failed to save MFA secret for user ID: ' . $userId); |
| 41 | } |
| 42 | |
| 43 | return $secret; |
| 44 | } |
| 45 | |
| 46 | public static function getCookieHash(): string { |
| 47 | return hash_hmac('sha512', Wordpress::getAuthSalt(), Wordpress::getAuthKey()); |
| 48 | } |
| 49 | |
| 50 | public static function setCookie(): void { |
| 51 | $expire = time() + 86400; |
| 52 | $path = defined('COOKIEPATH') ? COOKIEPATH : '/'; |
| 53 | $domain = defined('COOKIE_DOMAIN') ? COOKIE_DOMAIN : ''; |
| 54 | $secure = is_ssl(); |
| 55 | |
| 56 | setcookie( |
| 57 | self::MFA_COOKIE_KEY, |
| 58 | self::getCookieHash(), |
| 59 | [ |
| 60 | 'expires' => $expire, |
| 61 | 'path' => $path, |
| 62 | 'domain' => $domain, |
| 63 | 'secure' => $secure, |
| 64 | 'httponly' => true, |
| 65 | 'samesite' => 'None' |
| 66 | ] |
| 67 | ); |
| 68 | } |
| 69 | |
| 70 | /** |
| 71 | * Clear the MFA setup for a user. |
| 72 | */ |
| 73 | public static function clearCookie(): void { |
| 74 | $userId = Helper::getUserId(); |
| 75 | |
| 76 | $expire = time() - 3600; |
| 77 | $path = defined('COOKIEPATH') ? COOKIEPATH : '/'; |
| 78 | $domain = defined('COOKIE_DOMAIN') ? COOKIE_DOMAIN : ''; |
| 79 | $secure = is_ssl(); |
| 80 | |
| 81 | setcookie( |
| 82 | self::MFA_COOKIE_KEY, |
| 83 | '', |
| 84 | [ |
| 85 | 'expires' => $expire, |
| 86 | 'path' => $path, |
| 87 | 'domain' => $domain, |
| 88 | 'secure' => $secure, |
| 89 | 'httponly' => true, |
| 90 | 'samesite' => 'None' |
| 91 | ] |
| 92 | ); |
| 93 | |
| 94 | // Clear user metadata for MFA |
| 95 | Wordpress::deleteUserMeta($userId, self::MFA_KEY); |
| 96 | Wordpress::deleteUserMeta($userId, self::MFA_SETUP_COMPLETED); |
| 97 | } |
| 98 | |
| 99 | |
| 100 | public static function isSetupCompleted(): bool { |
| 101 | $userId = Helper::getUserId(); |
| 102 | return Wordpress::getUserMeta($userId, self::MFA_SETUP_COMPLETED, true) ?? false; |
| 103 | } |
| 104 | |
| 105 | /** |
| 106 | * Generate a QR Code URL for Google Authenticator. |
| 107 | * |
| 108 | * @return array |
| 109 | * @throws Exception |
| 110 | */ |
| 111 | public static function getQRcode(): array { |
| 112 | |
| 113 | $authenticator = self::getAuthenticator(); |
| 114 | $domain = Wordpress::getSiteDomain(); |
| 115 | $label = "JetBackup [$domain]"; |
| 116 | $userId = Helper::getUserId(); |
| 117 | $secret = Wordpress::getUserMeta($userId, self::MFA_KEY, true); |
| 118 | if (!$secret || $secret == '') $secret = self::createSecret(); |
| 119 | |
| 120 | return [ |
| 121 | 'code' => $authenticator->getQRCodeGoogleUrl($secret, $label), |
| 122 | 'isFirstTime' => !self::isSetupCompleted(), |
| 123 | ]; |
| 124 | |
| 125 | } |
| 126 | |
| 127 | /** |
| 128 | * Verify the provided MFA code. |
| 129 | * |
| 130 | * @param int $code |
| 131 | * |
| 132 | * @return bool |
| 133 | */ |
| 134 | public static function verifyCode(int $code): bool { |
| 135 | $userId = Helper::getUserId(); |
| 136 | $secret = Wordpress::getUserMeta($userId, self::MFA_KEY, true); |
| 137 | if (!$secret) return false; |
| 138 | |
| 139 | $attempts = (int) Wordpress::getUserMeta($userId, self::MFA_MAX_ATTEMPTS_KEY, true); |
| 140 | |
| 141 | if ($attempts > 0) usleep(min(pow($attempts, 2) * 100000, 3000000)); // up to 3s |
| 142 | $isValid = self::getAuthenticator()->verifyCode($secret, $code, 3, null); |
| 143 | |
| 144 | if ($isValid) { |
| 145 | Wordpress::updateUserMeta($userId, self::MFA_SETUP_COMPLETED, 'true', ''); |
| 146 | Wordpress::deleteUserMeta($userId, self::MFA_MAX_ATTEMPTS_KEY); |
| 147 | return true; |
| 148 | } |
| 149 | |
| 150 | // Failed attempt |
| 151 | $attempts++; |
| 152 | Wordpress::updateUserMeta($userId, self::MFA_MAX_ATTEMPTS_KEY, $attempts, ''); |
| 153 | |
| 154 | // If max attempts reached, logout |
| 155 | if ($attempts >= self::MFA_MAX_ATTEMPTS) { |
| 156 | Wordpress::wpLogout(); |
| 157 | Wordpress::wpRedirect(Wordpress::wpLoginURL('', true)); |
| 158 | exit; |
| 159 | } |
| 160 | |
| 161 | return false; |
| 162 | } |
| 163 | |
| 164 | |
| 165 | } |