參考discuz的passpor寫的php加密解密處理類

/*--------------------------------------- = 著作權協議： = GPL (The GNU GENERAL PUBLIC LICENSE Version 2, June 1991) =------------------------------------------------------------ = 檔案名稱：cls.sys_crypt.php = 摘 要：php加密解密處理類 = 版 本：1.0 = 參 考：Discuz論壇的passport相關函數 =------------------------------------------------------------ = Script Written By PHPWMS項目組 = 最後更新：xinge = 最後日期：2007-12-09 ---------------------------------------=*/ class SysCrypt { private $crypt_key; // 建構函式 public function __construct($crypt_key) { $this -> crypt_key = $crypt_key; } public function php_encrypt($txt) { srand((double)microtime() * 1000000); $encrypt_key = md5(rand(0,32000)); $ctr = 0; $tmp = ''; for($i = 0;$i $ctr = $ctr == strlen($encrypt_key) ? 0 : $ctr; $tmp .= $encrypt_key[$ctr].($txt[$i]^$encrypt_key[$ctr++]); } return base64_encode(self::__key($tmp,$this -> crypt_key)); } public function php_decrypt($txt) { $txt = self::__key(base64_decode($txt),$this -> crypt_key); $tmp = ''; for($i = 0;$i < strlen($txt); $i++) { $md5 = $txt[$i]; $tmp .= $txt[++$i] ^ $md5; } return $tmp; } private function __key($txt,$encrypt_key) { $encrypt_key = md5($encrypt_key); $ctr = 0; $tmp = ''; for($i = 0; $i < strlen($txt); $i++) { $ctr = $ctr == strlen($encrypt_key) ? 0 : $ctr; $tmp .= $txt[$i] ^ $encrypt_key[$ctr++]; } return $tmp; } public function __destruct() { $this -> crypt_key = null; } } #--調用樣本 $sc = new SysCrypt('phpwms'); $text = '110'; print($sc -> php_encrypt($text)); print(' '); print($sc -> php_decrypt($sc -> php_encrypt($text))); ?> 複製代碼

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