/**
* url_crypt加密算法的加密函数
*
* @param string $tpl 产品线的tpl标识
* @param string $key 加密所用的key
* @param string $str 需要加密的内容
* @return 加密后的16进制字符串或者false
*/
public static function url_encrypt($tpl, $key, $str)
{
// first fcrypt hmac
if (empty($str)) {
return false;
}
$fcrypt_hash = fcrypt_encode_hmac(self::_buildFcryptKey($tpl, $key), $str);
// then transform to low hex digits
// the not ported fcrypt_encode_hex_low function use high nibble first style
// why not use bin2hex? bin2hex is not clearly high nibble
$fcrypt_hstr_arr = unpack('H*hash', $fcrypt_hash);
if (isset($fcrypt_hstr_arr['hash'])) {
$fcrypt_hstr = strtolower($fcrypt_hstr_arr['hash']);
} else {
return false;
}
return $fcrypt_hstr . sprintf("%04x", self::_crc16($fcrypt_hstr));
}
private function _makeNshead($logid_int, $query_pack)
{
$nshead = new ZCacheNsHead();
$nshead_arr['provider'] = "zcacheadapter";
$nshead_arr['log_id'] = $logid_int;
$nshead_arr['reserved'] = $this->zcfObj->crypt_flag;
if ($this->zcfObj->crypt_flag) {
$crypt_data = fcrypt_encode_hmac('key', $query_pack);
//$this->_log("fcrypt_encode_hmac: " . strlen($query_pack) . " " . strlen($crypt_data) );
$nshead_arr['body_len'] = strlen($crypt_data);
$buffer = $nshead->build_nshead($nshead_arr) . $crypt_data;
} else {
$nshead_arr['body_len'] = strlen($query_pack);
$buffer = $nshead->build_nshead($nshead_arr) . $query_pack;
}
return $buffer;
}
/**
* 生成图片sign
* $sign_str 加密前的字符串
*/
private function _create_sign($sign_str)
{
$s = fcrypt_encode_hmac($this->crypt_key, $sign_str);
return bin2hex($s);
}
