Teilen Sie den PHP-Entschlüsselungscode für die WeChat-Zahlung v3

//微信原生支付 class Wxpay { /* * 支付(小程序支付) * @param type $sn 订单编号 * @param type $money 金额 * @param type $openid 用户小程序openid * @return type */ public static function getPayParam($sn, $money, $openid) { $url = 'https://api.mch.weixin.qq.com/v3/pay/transactions/jsapi'; $notify_url = url('/api/weixin/notify'); $data = []; $data['appid'] = Action::config(CONFIG_WXXCX, 'app_id'); $data['mchid'] = Action::config(CONFIG_WXXCX, 'mchid'); //商户号 $data['description'] = 'xxx'; //描述？ $data['out_trade_no'] = $sn; //商户系统内部订单号 $data['time_expire'] = date('Y-m-d') . 'T' . date('H:i:s', (time() + 1800)) . '+08:00'; //订单失效时间2018-06-08T10:34:56+08:00 $data['notify_url'] = $notify_url; //异步通知接口地址 $data['amount'] = ['total' => $money * 100, 'currency' => 'CNY']; //金额 $data['payer'] = ['openid' => $openid]; //用户 $re = self::wxCurl($url, $data, 'POST'); if (!isset($re['prepay_id'])) { api_fail('参数获取失败'); } $result = []; $result['appId'] = Action::config(CONFIG_WXXCX, 'app_id'); $result['timeStamp'] = (string)time(); $result['nonceStr'] = uniqid(); $result['package'] = 'prepay_id=' . $re['prepay_id']; $result['signType'] = 'RSA'; $result['paySign'] = self::getPaySign($result); return $result; } /** * 查询订单 * @param type $sn */ public static function select($sn, $return = false) { $mchid = Action::config(CONFIG_WXXCX, 'mchid'); //商户号 $url = 'https://api.mch.weixin.qq.com/v3/pay/transactions/out-trade-no/' . $sn . '?mchid=' . $mchid; $re = self::wxCurl($url, [], 'GET'); if ($return) { return $re; } if (isset($re['trade_state']) && $re['trade_state'] == 'SUCCESS') { return true; } return false; } /** * 关闭订单 * @param type $sn */ public static function close($sn) { $mchid = Action::config(CONFIG_WXXCX, 'mchid'); //商户号 $url = 'https://api.mch.weixin.qq.com/v3/pay/transactions/out-trade-no/' . $sn . '/close'; $re = self::wxCurl($url, ['mchid'=>$mchid], 'POST'); return true; } /** * 退款 * @param type $sn */ public static function refund($order_sn,$refund_sn,$total,$refund,$msg='退款') { $url='https://api.mch.weixin.qq.com/v3/refund/domestic/refunds'; $data=[]; $data['notify_url']=url('ag/weixin/notify_refund'); $data['out_trade_no']=$order_sn;//订单号 $data['out_refund_no']=$refund_sn;//退款单号 $data['reason']=$msg; $data['amount']=['refund'=>$refund*100,'total'=>$total*100,'currency'=>'CNY']; $re = self::wxCurl($url, $data, 'POST'); return $re; } //请求 public static function wxCurl($url, $data = [], $method = 'GET') { $Authorization = self::getReSign($url, $data, $method); $header = [ 'Content-Type: application/json', 'Accept: application/json', 'User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.90 Safari/537.36 Edg/89.0.774.63', 'Authorization: ' . $Authorization ]; $redata = $data ? json_encode($data) : ''; $res = reCurl($url, $redata, $header); return $res ? json_decode($res, true) : []; } //后端请求签名 public static function getReSign($url, $data, $method = 'GET') { $url_parts = parse_url($url); $canonical_url = ($url_parts['path'] . (!empty($url_parts['query']) ? "?${url_parts['query']}" : "")); $http_method = $method; $timestamp = time(); $nonce = uniqid(); $body = $data ? json_encode($data) : ''; $mchid = Action::config(CONFIG_WXXCX, 'mchid'); //商户id $serial_no = Action::config(CONFIG_WXXCX, 'serial_no'); //证书编号 $private_key = self::getPrivateKey(BASE_PATH . 'cert/apiclient_key.pem'); //商户私钥 $message = $http_method . "\n" . $canonical_url . "\n" . $timestamp . "\n" . $nonce . "\n" . $body . "\n"; openssl_sign($message, $raw_sign, $private_key, 'sha256WithRSAEncryption'); $sign = base64_encode($raw_sign); $token = sprintf('mchid="%s",nonce_str="%s",timestamp="%d",serial_no="%s",signature="%s"', $mchid, $nonce, $timestamp, $serial_no, $sign); return 'WECHATPAY2-SHA256-RSA2048 ' . $token; } //前端小程序签名 public static function getPaySign($result) { $private_key = self::getPrivateKey(BASE_PATH . 'cert/apiclient_key.pem'); //商户私钥 $message = $result['appId'] . "\n" . $result['timeStamp'] . "\n" . $result['nonceStr'] . "\n" . $result['package'] . "\n"; openssl_sign($message, $raw_sign, $private_key, 'sha256WithRSAEncryption'); $sign = base64_encode($raw_sign); return $sign; } //验证签名 public static function checkSign() { $header = Context::get('header'); $serial_no = $header['wechatpay-serial'] ?? ''; //微信平台序列号 $timeStamp = $header['wechatpay-timestamp'] ?? ''; $nonce = $header['wechatpay-nonce'] ?? ''; $body = Context::get('raw'); $wx_sign = $header['wechatpay-signature'] ?? ''; $wx_serial_no = Action::config(CONFIG_WXXCX, 'wx_serial_no');//保存的序列号 if (!$serial_no || $wx_serial_no != $serial_no) { \sff\Log::write('签名过期'); return false; } $message = $timeStamp . "\n" . $nonce . "\n" . $body . "\n"; $wx_sign = base64_decode($wx_sign); $public_key = self::getPublicKey(BASE_PATH . 'cert/wx_public_cert.pem'); //平台公钥 $res = openssl_verify($message, $wx_sign, $public_key, OPENSSL_ALGO_SHA256); if ($res == 1) { return true; } \sff\Log::write('验签失败'); return false; } //获取私钥 public static function getPrivateKey($filepath) { return openssl_get_privatekey(file_get_contents($filepath)); } //获取公钥 public static function getPublicKey($filepath) { return openssl_pkey_get_public(file_get_contents($filepath)); } //加密数据 public static function getEncrypt($str) { //$str是待加密字符串 $public_key_path = BASE_PATH . 'cert/wx_public_cert.pem'; //'平台证书路径'; $public_key = file_get_contents($public_key_path); $encrypted = ''; if (openssl_public_encrypt($str, $encrypted, $public_key, OPENSSL_PKCS1_OAEP_PADDING)) { //base64编码 $sign = base64_encode($encrypted); } else { throw new Exception('encrypt failed'); } return $sign; } //解密数据 public static function decryptToString($ciphertext, $associatedData, $nonceStr) { $aesKey = Action::config(CONFIG_WXXCX, 'mch_keyv3'); //商户apiv3密钥解密 $str = base64_decode($ciphertext); if (strlen($str) <= 16) { return ''; } // ext-sodium (default installed on >= PHP 7.2) return \sodium_crypto_aead_aes256gcm_decrypt($str, $associatedData, $nonceStr, $aesKey); } //下载平台证书 public static function downCert() { $url = 'https://api.mch.weixin.qq.com/v3/certificates'; $re = self::wxCurl($url, [], 'GET'); if (!isset($re['data'])) { api_fail('获取证书失败'); } $ciphertext = $re['data'][0]['encrypt_certificate']['ciphertext']; $associatedData = $re['data'][0]['encrypt_certificate']['associated_data']; $nonceStr = $re['data'][0]['encrypt_certificate']['nonce']; $data = self::decryptToString($ciphertext, $associatedData, $nonceStr); if (!$data) { api_fail('获取证书解密失败'); } file_put_contents(BASE_PATH . '/cert/wx_public_cert.pem', $data); return $data; } }