| commit | author | age | ||
| 19351a | 1 | <?php |
| B | 2 | |
| 3 | /** | |
| 4 | * 加密解密类 | |
| 5 | */ | |
| 6 | ||
| 7 | if (!defined('IN_ECS')) | |
| 8 | { | |
| 9 | die('Hacking attempt'); | |
| 10 | } | |
| 11 | ||
| 12 | ||
| 13 | /** | |
| 14 | * 加密函数 | |
| 15 | * @param string $str 加密前的字符串 | |
| 16 | * @param string $key 密钥 | |
| 17 | * @return string 加密后的字符串 | |
| 18 | */ | |
| 19 | function encrypt($str, $key = AUTH_KEY) | |
| 20 | { | |
| 21 | $coded = ''; | |
| 22 | $keylength = strlen($key); | |
| 23 | ||
| 24 | for ($i = 0, $count = strlen($str); $i < $count; $i += $keylength) | |
| 25 | { | |
| 26 | $coded .= substr($str, $i, $keylength) ^ $key; | |
| 27 | } | |
| 28 | ||
| 29 | return str_replace('=', '', base64_encode($coded)); | |
| 30 | } | |
| 31 | ||
| 32 | /** | |
| 33 | * 解密函数 | |
| 34 | * @param string $str 加密后的字符串 | |
| 35 | * @param string $key 密钥 | |
| 36 | * @return string 加密前的字符串 | |
| 37 | */ | |
| 38 | function decrypt($str, $key = AUTH_KEY) | |
| 39 | { | |
| 40 | $coded = ''; | |
| 41 | $keylength = strlen($key); | |
| 42 | $str = base64_decode($str); | |
| 43 | ||
| 44 | for ($i = 0, $count = strlen($str); $i < $count; $i += $keylength) | |
| 45 | { | |
| 46 | $coded .= substr($str, $i, $keylength) ^ $key; | |
| 47 | } | |
| 48 | ||
| 49 | return $coded; | |
| 50 | } | |
| 51 | ||
| 52 | ?> | |
