Open ghost opened 6 years ago
网友提供,请参考
/**
* 对明文进行加密
* @param string $text 需要加密的明文
* @return string 加密后的密文
*/
public function encrypt($text, $appid){
try {
//获得16位随机字符串,填充到明文之前
$random = $this->getRandomStr();
$text = $random . pack("N", strlen($text)) . $text . $appid;
$iv = substr($this->key, 0, 16);
$pkc_encoder = new PKCS7Encoder;
$text = $pkc_encoder->encode($text);
$encrypted = openssl_encrypt($text,'AES-256-CBC',substr($this->key, 0, 32),OPENSSL_ZERO_PADDING,$iv);
return array(ErrorCode::$OK, $encrypted);
} catch (Exception $e) {
//print $e;
return array(ErrorCode::$EncryptAESError, null);
}
}
/**
* 对密文进行解密
* @param string $encrypted 需要解密的密文
* @return string 解密得到的明文
*/
public function decrypt($encrypted, $appid){
try {
$iv = substr($this->key, 0, 16);
$decrypted = openssl_decrypt($encrypted,'AES-256-CBC',substr($this->key, 0, 32),OPENSSL_ZERO_PADDING,$iv);
} catch (Exception $e) {
return array(ErrorCode::$DecryptAESError, null);
}
try {
//去除补位字符
$pkc_encoder = new PKCS7Encoder;
$result = $pkc_encoder->decode($decrypted);
//去除16位随机字符串,网络字节序和AppId
if (strlen($result) < 16)
return "";
$content = substr($result, 16, strlen($result));
$len_list = unpack("N", substr($content, 0, 4));
$xml_len = $len_list[1];
$xml_content = substr($content, 4, $xml_len);
$from_appid = substr($content, $xml_len + 4);
if (!$appid)
$appid = $from_appid;
//如果传入的appid是空的,则认为是订阅号,使用数据中提取出来的appid
} catch (Exception $e) {
//print $e;
return array(ErrorCode::$IllegalBuffer, null);
}
if ($from_appid != $appid)
return array(ErrorCode::$ValidateAppidError, null);
//不注释上边两行,避免传入appid是错误的情况
return array(0, $xml_content, $from_appid);
//增加appid,为了解决后面加密回复消息的时候没有appid的订阅号会无法回复
}
@szargv
测试可用,已上线,非常感谢
尝试修改这块代码,一直没成功