<?php
namespace WeMini;
use WeChat\Contracts\BasicWeChat;
use WeChat\Contracts\Tools;
use WeChat\Exceptions\InvalidDecryptException;
use WeChat\Exceptions\InvalidResponseException;
class Crypt extends BasicWeChat
{
public function decode($iv, $sessionKey, $encryptedData)
{
require_once __DIR__ . DIRECTORY_SEPARATOR . 'crypt' . DIRECTORY_SEPARATOR . 'wxBizDataCrypt.php';
$pc = new \WXBizDataCrypt($this->config->get('appid'), $sessionKey);
$errCode = $pc->decryptData($encryptedData, $iv, $data);
if ($errCode == 0) {
return json_decode($data, true);
}
return false;
}
public function session($code)
{
$appid = $this->config->get('appid');
$secret = $this->config->get('appsecret');
$url = "https://api.weixin.qq.com/sns/jscode2session?appid={$appid}&secret={$secret}&js_code={$code}&grant_type=authorization_code";
return json_decode(Tools::get($url), true);
}
public function userInfo($code, $iv, $encryptedData)
{
$result = $this->session($code);
if (empty($result['session_key'])) {
throw new InvalidResponseException('Code 换取 SessionKey 失败', 403);
}
$userinfo = $this->decode($iv, $result['session_key'], $encryptedData);
if (empty($userinfo)) {
throw new InvalidDecryptException('用户信息解析失败', 403);
}
return array_merge($result, $userinfo);
}
}