PHP 加密/解密函数 dencrypt(动态密文,带压缩功能,支持中文)_PHP
- WBOYOriginal
- 2016-06-01 12:23:341121browse
复制代码 代码如下:
// +----------------------------------------------------------------------+
// | Willko Framework |
// +----------------------------------------------------------------------+
// | Copyright (c) 2008-2009 Willko Cheng |
// +----------------------------------------------------------------------+
// | Authors: Willko Cheng |
// +----------------------------------------------------------------------+
// $string 明文 或 密文
// $isEncrypt 是否加密
// $key 密匙
// 采用SHA1生成密匙簿,超过300个字符使用ZLIB压缩
function dencrypt($string, $isEncrypt = true, $key = KEY_SPACE) {
if (!isset($string{0}) || !isset($key{0})) {
return false;
}
$dynKey = $isEncrypt ? hash('sha1', microtime(true)) : substr($string, 0, 40);
$fixedKey = hash('sha1', $key);
$dynKeyPart1 = substr($dynKey, 0, 20);
$dynKeyPart2 = substr($dynKey, 20);
$fixedKeyPart1 = substr($fixedKey, 0, 20);
$fixedKeyPart2 = substr($fixedKey, 20);
$key = hash('sha1', $dynKeyPart1 . $fixedKeyPart1 . $dynKeyPart2 . $fixedKeyPart2);
$string = $isEncrypt ? $fixedKeyPart1 . $string . $dynKeyPart2 : (isset($string{339}) ? gzuncompress(base64_decode(substr($string, 40))) : base64_decode(substr($string, 40)));
$n = 0;
$result = '';
$len = strlen($string);
for ($n = 0; $n $result .= chr(ord($string{$n}) ^ ord($key{$n % 40}));
}
return $isEncrypt ? $dynKey . str_replace('=', '', base64_encode($n > 299 ? gzcompress($result) : $result)) : substr($result, 20, -20);
}
Statement:The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn