<?php
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/**
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* QuickSDK游戏同步加解密算法描述
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* @copyright quicksdk 2015
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* @author quicksdk
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* @version quicksdk v 0.0.1 2014/9/2
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*/
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class quickAsy
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{
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/**
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* 解密方法
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* $strEncode 密文
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* $keys 解密密钥 为游戏接入时分配的 callback_key
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*/
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public static function decode($strEncode, $keys)
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{
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if (empty($strEncode)) {
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return $strEncode;
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}
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preg_match_all('(\d+)', $strEncode, $list);
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$list = $list[0];
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if (count($list) > 0) {
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$keys = self::getBytes($keys);
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for ($i = 0; $i < count($list); $i++) {
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$keyVar = $keys[$i % count($keys)];
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$data[$i] = $list[$i] - (0xff & $keyVar);
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}
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return self::toStr($data);
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} else {
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return $strEncode;
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}
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}
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/**
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* 计算游戏同步签名
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*/
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public static function getSign($params, $callbackkey)
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{
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return md5($params['nt_data'] . $params['sign'] . $callbackkey);
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}
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/**
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* 本地计算MD5签名PHP示例代码
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* @param $callbackkey 后台分配的通信密钥
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* @return 本地计算的md5签名值
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*/
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public static function getMd5Sign($callbackkey)
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{
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$params = $_POST;
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unset($params['sign']);
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ksort($params);
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$signKey = '';
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foreach ($params as $key => $val) {
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$signKey .= $key . '=' . $val . '&';
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}
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$signKey .= $callbackkey;
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return md5($signKey);
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}
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public static function getMd5Sign2($callbackkey, $needLinkSign = true, $signKeyName = "sign")
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{
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$params = $_POST;
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unset($params[$signKeyName]);
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ksort($params);
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$signKey = '';
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foreach ($params as $key => $val) {
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if ($signKey != '') {
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$signKey .= "&";
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}
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$signKey .= $key . '=' . $val;
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}
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if ($needLinkSign) {
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$signKey .= '&';
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}
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$signKey .= $callbackkey;
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return md5($signKey);
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}
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/**
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* MD5签名替换
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*/
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static private function replaceMD5($md5)
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{
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strtolower($md5);
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$bytes = self::getBytes($md5);
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$len = count($bytes);
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if ($len >= 23) {
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$change = $bytes[1];
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$bytes[1] = $bytes[13];
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$bytes[13] = $change;
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$change2 = $bytes[5];
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$bytes[5] = $bytes[17];
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$bytes[17] = $change2;
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$change3 = $bytes[7];
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$bytes[7] = $bytes[23];
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$bytes[23] = $change3;
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} else {
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return $md5;
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}
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return self::toStr($bytes);
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}
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/**
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* 转成字符数据
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*/
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private static function getBytes($string)
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{
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$bytes = array();
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for ($i = 0; $i < strlen($string); $i++) {
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$bytes[] = ord($string[$i]);
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}
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return $bytes;
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}
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/**
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* 转化字符串
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*/
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private static function toStr($bytes)
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{
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$str = '';
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foreach ($bytes as $ch) {
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$str .= chr($ch);
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}
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return $str;
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}
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}
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