100 lines
3.5 KiB
PHP
100 lines
3.5 KiB
PHP
<?php
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// +------------------------------------------------+
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// |http://www.cjango.com |
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// +------------------------------------------------+
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// | 修复BUG不是一朝一夕的事情，等我喝醉了再说吧！ |
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// +------------------------------------------------+
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// | Author: 小陈叔叔 <Jason.Chen> |
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// +------------------------------------------------+
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namespace tools;
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use think\Config as Conf;
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class Crypt
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{
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/**
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* 数据签名认证
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* @param array $data
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* @return string
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*/
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public static function dataAuthSign($data = [])
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{
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ksort($data);
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$code = http_build_query($data);
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return sha1($code . Conf::get('data_auth_key'));
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}
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/**
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* 用户MD5不可逆加密
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* @param string $string
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* @return string
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*/
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public static function uMd5($string)
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{
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$key = Conf::get('data_auth_key');
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return '' === $string ? '' : md5(sha1($string) . $key);
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}
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/**
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* 长串加密
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* @param string $string
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* @return string
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*/
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public static function uSha1($string)
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{
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$key = Conf::get('data_auth_key');
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return '' === $string ? '' : sha1(md5($string) . $key);
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}
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/**
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* Discuz 经典双向加密/解密
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* @param string $string 明文 或 密文
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* @param string $operation DECODE表示解密,其它表示加密
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* @param string $key 密匙
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* @param string $expiry 密文有效期
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*/
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public static function discuz($string, $operation = 'DECODE', $key = '', $expiry = 0)
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{
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$ckey_length = 4;
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$key = md5($key ? $key : Conf::get('data_auth_key'));
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$keya = md5(substr($key, 0, 16));
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$keyb = md5(substr($key, 16, 16));
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$keyc = $ckey_length ? ($operation == 'DECODE' ? substr($string, 0, $ckey_length) : substr(md5(microtime()), -$ckey_length)) : '';
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$cryptkey = $keya . md5($keya . $keyc);
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$key_length = strlen($cryptkey);
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$string = $operation == 'DECODE' ? base64_decode(substr($string, $ckey_length)) : sprintf('%010d', $expiry ? $expiry + time() : 0) . substr(md5($string . $keyb), 0, 16) . $string;
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$string_length = strlen($string);
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$result = '';
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$box = range(0, 255);
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$rndkey = [];
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for ($i = 0; $i <= 255; $i++) {
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$rndkey[$i] = ord($cryptkey[$i % $key_length]);
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}
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for ($j = $i = 0; $i < 256; $i++) {
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$j = ($j + $box[$i] + $rndkey[$i]) % 256;
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$tmp = $box[$i];
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$box[$i] = $box[$j];
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$box[$j] = $tmp;
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}
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for ($a = $j = $i = 0; $i < $string_length; $i++) {
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$a = ($a + 1) % 256;
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$j = ($j + $box[$a]) % 256;
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$tmp = $box[$a];
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$box[$a] = $box[$j];
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$box[$j] = $tmp;
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$result .= chr(ord($string[$i]) ^ ($box[($box[$a] + $box[$j]) % 256]));
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}
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if ($operation == 'DECODE') {
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if ((substr($result, 0, 10) == 0 || substr($result, 0, 10) - time() > 0) && substr($result, 10, 16) == substr(md5(substr($result, 26) . $keyb), 0, 16)) {
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return substr($result, 26);
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} else {
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return '';
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}
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} else {
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return $keyc . str_replace('=', '', base64_encode($result));
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}
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}
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}
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