不支持压缩 其他都支持 基于DZ的
- public static function authcode($string, $operation = 'DECODE', $key = '', $expiry = 0)
- {
- $ckey_length = 4;
- $key = md5($key ? $key : "website2018");
- $keya = md5(substr($key, 0, 16));
- $keyb = md5(substr($key, 16, 16));
- $keyc = $ckey_length ? ($operation == 'DECODE' ? substr($string, 0, $ckey_length) : substr(md5(microtime()), -$ckey_length)) : '';
- $cryptkey = $keya . md5($keya . $keyc);
- $key_length = strlen($cryptkey);
- $string = $operation == 'DECODE' ? self::base64url_decode(substr($string, $ckey_length)) : sprintf('%010d', $expiry ? $expiry + time() : 0) . substr(md5($string . $keyb), 0, 16) . $string;
- $string_length = strlen($string);
- $result = '';
- $box = range(0, 255);
- $rndkey = array();
- for ($i = 0; $i <= 255; $i++)
- {
- $rndkey[$i] = ord($cryptkey[$i % $key_length]);
- }
- for ($j = $i = 0; $i < 256; $i++)
- {
- $j = ($j + $box[$i] + $rndkey[$i]) % 256;
- $tmp = $box[$i];
- $box[$i] = $box[$j];
- $box[$j] = $tmp;
- }
- for ($a = $j = $i = 0; $i < $string_length; $i++)
- {
- $a = ($a + 1) % 256;
- $j = ($j + $box[$a]) % 256;
- $tmp = $box[$a];
- $box[$a] = $box[$j];
- $box[$j] = $tmp;
- $result .= chr(ord($string[$i]) ^ ($box[($box[$a] + $box[$j]) % 256]));
- }
- if ($operation == 'DECODE')
- {
- if ((substr($result, 0, 10) == 0 || substr($result, 0, 10) - time() > 0) && substr($result, 10, 16) == substr(md5(substr($result, 26) . $keyb), 0, 16))
- {
- return substr($result, 26);
- }
- else
- {
- return '';
- }
- }
- else
- {
- return $keyc . str_replace('=', '', self::base64url_encode($result));
- }
- }
- public static function base64url_encode($data) {
- return rtrim(strtr(base64_encode($data), '+/', '-_'), '=');
- }
- public static function base64url_decode($data) {
- return base64_decode(str_pad(strtr($data, '-_', '+/'), strlen($data) % 4, '=', STR_PAD_RIGHT));
- }
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