BackupGuard
3 years ago
Request
3 years ago
SGCallback.php
3 years ago
SGCdrEntry.php
3 years ago
SGCharsetHandler.php
3 years ago
SGEncrypt.php
3 years ago
SGEntry.php
3 years ago
SGFileEntry.php
3 years ago
SGMysqldump.php
3 years ago
SGReviewManager.php
3 years ago
SGUploadHandler.php
3 years ago
SGEncrypt.php
59 lines
| 1 | <?php |
| 2 | |
| 3 | set_include_path(SG_LIB_PATH . 'phpseclib'); |
| 4 | if (!class_exists('Crypt_AES')) { |
| 5 | include_once('Crypt/AES.php'); |
| 6 | } |
| 7 | if (!function_exists('crypt_random_string')) { |
| 8 | include_once('Crypt/Random.php'); |
| 9 | } |
| 10 | |
| 11 | class SGEncrypt |
| 12 | { |
| 13 | public static function encrypt($data, $key) |
| 14 | { |
| 15 | $iv = self::generateIV(); |
| 16 | $cipher = self::getCipher($iv, $key); |
| 17 | $data = $cipher->encrypt($data); |
| 18 | |
| 19 | return $iv . $data; |
| 20 | } |
| 21 | |
| 22 | public static function decrypt($encrypted, $key) |
| 23 | { |
| 24 | list($iv, $data) = self::extractIV($encrypted); |
| 25 | |
| 26 | $cipher = self::getCipher($iv, $key); |
| 27 | return $cipher->decrypt($data); |
| 28 | } |
| 29 | |
| 30 | private static function getCipher($iv, $key) |
| 31 | { |
| 32 | $cipher = new Crypt_AES('cbc'); |
| 33 | $cipher->setKeyLength(256); |
| 34 | $cipher->setKey(hex2bin(hash('sha256', $key))); |
| 35 | $cipher->setIV($iv); |
| 36 | |
| 37 | return $cipher; |
| 38 | } |
| 39 | |
| 40 | private static function generateIV($length = 32) |
| 41 | { |
| 42 | return crypt_random_string($length); |
| 43 | } |
| 44 | |
| 45 | private static function extractIV($data, $length = 32) |
| 46 | { |
| 47 | if (strlen($data) <= $length) { |
| 48 | $ftpPassword = SGConfig::get('SG_FTP_PASSWORD'); |
| 49 | $data = self::encrypt($ftpPassword, NONCE_SALT); |
| 50 | SGConfig::set('SG_FTP_PASSWORD', base64_encode($data)); |
| 51 | } |
| 52 | |
| 53 | $iv = substr($data, 0, $length); |
| 54 | $data = substr($data, $length); |
| 55 | |
| 56 | return [$iv, $data]; |
| 57 | } |
| 58 | } |
| 59 |