/**
* @param string $body
* @return mixed
* @throws \ErrorException
*/
public function buildMessagePackage($body)
{
$xml = simplexml_load_string($body, 'SimpleXMLElement', LIBXML_NOCDATA);
if ($xml === false) {
throw new \BadFunctionCallException('Load xml error.');
}
$crypt = new PrpCrypt($this->_encodingAesKey);
$decrypt = $crypt->decrypt((string) $xml->Encrypt, $this->_corpId);
return new MessagePackage($decrypt);
}
/**
* 验证URL
*
* @param string $msgSignature : 签名串，对应URL参数的msg_signature
* @param string $timestamp : 时间戳，对应URL参数的timestamp
* @param string $nonce : 随机串，对应URL参数的nonce
* @param string $echoStr : 随机串，对应URL参数的echostr
* @return string 成功返回0，失败返回对应的错误码
*/
public function verifyURL($msgSignature, $timestamp, $nonce, $echoStr)
{
if (strlen($this->_encodingAesKey) !== self::ENCODING_AES_KEY_LENGTH) {
return false;
}
$pc = new PrpCrypt($this->_encodingAesKey);
try {
$signature = $this->getSignature($timestamp, $nonce, $echoStr);
} catch (\Exception $e) {
return false;
}
if ($signature != $msgSignature) {
return false;
}
return $pc->decrypt($echoStr, $this->_corpId);
}
/**
* @param string $body
* @return string
*/
protected function decrypt($body)
{
$xml = static::buildXmlElement($body);
$crypt = new PrpCrypt($this->_encodingAesKey);
return $crypt->decrypt((string) $xml->Encrypt, $this->_corpId);
}
/**
* @param string $xml
* @return string
*/
protected function buildEncryptedXml($xml)
{
$crypt = new PrpCrypt($this->_encodingAesKey);
return $crypt->encrypt($xml, $this->_corpId);
}
