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wushumin
276
app/common/service/WechatPayV3Client.php
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276
app/common/service/WechatPayV3Client.php
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<?php
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namespace app\common\service;
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use app\common\model\WechatMerchant;
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class WechatPayV3Client
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{
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private WechatMerchant $merchant;
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public function __construct(WechatMerchant $merchant)
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{
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$this->merchant = $merchant;
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}
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public function createNativeTransaction(string $outTradeNo, string $description, int $amountFen, string $notifyUrl): array
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{
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$body = $this->buildPayBody($outTradeNo, $description, $amountFen, $notifyUrl);
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$resp = $this->request('POST', '/v3/pay/transactions/native', $body);
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$data = json_decode($resp['body'], true) ?: [];
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if ($resp['status'] >= 200 && $resp['status'] < 300) {
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return $data;
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}
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$message = $data['message'] ?? ('微信支付下单失败 HTTP ' . $resp['status']);
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throw new \RuntimeException($message);
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}
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public function createJsapiTransaction(string $outTradeNo, string $description, int $amountFen, string $notifyUrl, string $openid): array
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{
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$body = $this->buildJsapiPayBody($outTradeNo, $description, $amountFen, $notifyUrl, $openid);
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$resp = $this->request('POST', '/v3/pay/transactions/jsapi', $body);
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$data = json_decode($resp['body'], true) ?: [];
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if ($resp['status'] >= 200 && $resp['status'] < 300) {
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return $data;
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}
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$message = $data['message'] ?? ('微信支付下单失败 HTTP ' . $resp['status']);
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throw new \RuntimeException($message);
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}
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public function buildJsapiPayParams(string $appId, string $prepayId): array
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{
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$mchId = (string)$this->merchant->mch_id;
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$serialNo = (string)($this->merchant->serial_no ?? '');
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$privateKeyPem = (string)($this->merchant->private_key_pem ?? '');
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if ($privateKeyPem === '') {
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$privateKeyPem = $this->loadKeyPemFromFile();
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}
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if ($mchId === '' || $serialNo === '' || $privateKeyPem === '') {
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throw new \RuntimeException('微信支付密钥未配置（mch_id/serial_no/private_key_pem）');
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}
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$timeStamp = (string)time();
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$nonceStr = bin2hex(random_bytes(16));
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$package = 'prepay_id=' . $prepayId;
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$signStr = $appId . "\n" . $timeStamp . "\n" . $nonceStr . "\n" . $package . "\n";
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$privateKey = openssl_pkey_get_private($privateKeyPem);
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if (!$privateKey) {
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throw new \RuntimeException('私钥格式错误');
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}
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openssl_sign($signStr, $signature, $privateKey, OPENSSL_ALGO_SHA256);
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return [
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'appId' => $appId,
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'timeStamp' => $timeStamp,
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'nonceStr' => $nonceStr,
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'package' => $package,
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'signType' => 'RSA',
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'paySign' => base64_encode($signature),
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];
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}
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public function verifyPlatformSignature(string $timestamp, string $nonce, string $body, string $signature): bool
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{
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$certPath = getenv('WECHATPAY_PLATFORM_CERT_PATH') ?: '';
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if ($certPath === '' || !file_exists($certPath)) {
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throw new \RuntimeException('平台证书未配置');
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}
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$cert = file_get_contents($certPath);
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$publicKey = openssl_pkey_get_public($cert);
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if (!$publicKey) {
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throw new \RuntimeException('平台证书读取失败');
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}
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$message = $timestamp . "\n" . $nonce . "\n" . $body . "\n";
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$ok = openssl_verify($message, base64_decode($signature), $publicKey, OPENSSL_ALGO_SHA256);
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return $ok === 1;
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}
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public function decryptNotifyResource(array $resource, string $apiV3Key): array
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{
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$ciphertext = (string)($resource['ciphertext'] ?? '');
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$nonce = (string)($resource['nonce'] ?? '');
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$aad = (string)($resource['associated_data'] ?? '');
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if ($ciphertext === '' || $nonce === '') {
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throw new \RuntimeException('回调报文不完整');
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}
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$cipherRaw = base64_decode($ciphertext);
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$tag = substr($cipherRaw, -16);
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$data = substr($cipherRaw, 0, -16);
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$plain = openssl_decrypt($data, 'aes-256-gcm', $apiV3Key, OPENSSL_RAW_DATA, $nonce, $tag, $aad);
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if ($plain === false) {
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throw new \RuntimeException('回调报文解密失败');
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}
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return json_decode($plain, true) ?: [];
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}
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private function buildPayBody(string $outTradeNo, string $description, int $amountFen, string $notifyUrl): array
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{
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$mode = (string)($this->merchant->mode ?? 'direct');
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$mchId = (string)$this->merchant->mch_id;
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$appId = (string)($this->merchant->app_id ?? '');
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$subMchId = (string)($this->merchant->sub_mch_id ?? '');
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$subAppId = (string)($this->merchant->sub_app_id ?? '');
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if ($mode === 'direct') {
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if ($appId === '') {
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throw new \RuntimeException('商户 AppID 未配置');
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}
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return [
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'appid' => $appId,
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'mchid' => $mchId,
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'description' => $description,
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'out_trade_no' => $outTradeNo,
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'notify_url' => $notifyUrl,
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'amount' => ['total' => $amountFen, 'currency' => 'CNY'],
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];
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}
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if ($mode === 'service_provider') {
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if ($appId === '' || $subMchId === '') {
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throw new \RuntimeException('服务商模式配置不完整');
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}
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$body = [
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'sp_appid' => $appId,
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'sp_mchid' => $mchId,
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'sub_mchid' => $subMchId,
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'description' => $description,
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'out_trade_no' => $outTradeNo,
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'notify_url' => $notifyUrl,
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'amount' => ['total' => $amountFen, 'currency' => 'CNY'],
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];
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if ($subAppId !== '') {
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$body['sub_appid'] = $subAppId;
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}
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return $body;
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}
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throw new \RuntimeException('第三方支付模式未配置下单方式');
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}
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private function buildJsapiPayBody(string $outTradeNo, string $description, int $amountFen, string $notifyUrl, string $openid): array
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{
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$openid = trim($openid);
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if ($openid === '') {
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throw new \RuntimeException('openid 不能为空');
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}
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$mode = (string)($this->merchant->mode ?? 'direct');
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$mchId = (string)$this->merchant->mch_id;
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$appId = (string)($this->merchant->app_id ?? '');
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$subMchId = (string)($this->merchant->sub_mch_id ?? '');
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$subAppId = (string)($this->merchant->sub_app_id ?? '');
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if ($mode === 'direct') {
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if ($appId === '') {
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throw new \RuntimeException('商户 AppID 未配置');
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}
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return [
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'appid' => $appId,
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'mchid' => $mchId,
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'description' => $description,
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'out_trade_no' => $outTradeNo,
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'notify_url' => $notifyUrl,
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'amount' => ['total' => $amountFen, 'currency' => 'CNY'],
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'payer' => ['openid' => $openid],
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];
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}
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if ($mode === 'service_provider') {
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if ($appId === '' || $subMchId === '') {
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throw new \RuntimeException('服务商模式配置不完整');
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}
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$body = [
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'sp_appid' => $appId,
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'sp_mchid' => $mchId,
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'sub_mchid' => $subMchId,
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'description' => $description,
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'out_trade_no' => $outTradeNo,
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'notify_url' => $notifyUrl,
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'amount' => ['total' => $amountFen, 'currency' => 'CNY'],
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'payer' => [],
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];
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if ($subAppId !== '') {
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$body['sub_appid'] = $subAppId;
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$body['payer']['sub_openid'] = $openid;
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} else {
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$body['payer']['sp_openid'] = $openid;
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}
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return $body;
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}
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throw new \RuntimeException('第三方支付模式未配置下单方式');
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}
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private function request(string $method, string $path, array $body): array
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{
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$mchId = (string)$this->merchant->mch_id;
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$serialNo = (string)($this->merchant->serial_no ?? '');
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$privateKeyPem = (string)($this->merchant->private_key_pem ?? '');
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if ($privateKeyPem === '') {
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$privateKeyPem = $this->loadKeyPemFromFile();
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}
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if ($mchId === '' || $serialNo === '' || $privateKeyPem === '') {
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throw new \RuntimeException('微信支付密钥未配置（mch_id/serial_no/private_key_pem）');
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}
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$bodyJson = json_encode($body, JSON_UNESCAPED_UNICODE);
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$timestamp = (string)time();
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$nonceStr = bin2hex(random_bytes(16));
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$signStr = $method . "\n" . $path . "\n" . $timestamp . "\n" . $nonceStr . "\n" . $bodyJson . "\n";
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$privateKey = openssl_pkey_get_private($privateKeyPem);
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if (!$privateKey) {
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throw new \RuntimeException('私钥格式错误');
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}
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openssl_sign($signStr, $signature, $privateKey, OPENSSL_ALGO_SHA256);
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$signature = base64_encode($signature);
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$authorization = sprintf(
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'WECHATPAY2-SHA256-RSA2048 mchid="%s",nonce_str="%s",timestamp="%s",serial_no="%s",signature="%s"',
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$mchId,
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$nonceStr,
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$timestamp,
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$serialNo,
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$signature
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);
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$ch = curl_init('https://api.mch.weixin.qq.com' . $path);
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curl_setopt($ch, CURLOPT_CUSTOMREQUEST, $method);
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
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curl_setopt($ch, CURLOPT_HTTPHEADER, [
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'Accept: application/json',
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'Content-Type: application/json',
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'Authorization: ' . $authorization,
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'User-Agent: anxinyan-webman',
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]);
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curl_setopt($ch, CURLOPT_POSTFIELDS, $bodyJson);
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$respBody = curl_exec($ch);
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$status = (int)curl_getinfo($ch, CURLINFO_HTTP_CODE);
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if ($respBody === false) {
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$err = curl_error($ch);
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curl_close($ch);
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throw new \RuntimeException('微信支付请求失败: ' . $err);
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}
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curl_close($ch);
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return [
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'status' => $status,
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'body' => $respBody,
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];
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}
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private function loadKeyPemFromFile(): string
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{
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$path = (string)($this->merchant->apiclient_key_path ?? '');
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if ($path === '') return '';
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$real = realpath($path);
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$base = realpath(runtime_path() . '/wechatpay/merchants');
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if (!$real || !$base) return '';
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if (strpos($real, $base) !== 0) return '';
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if (!is_file($real)) return '';
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$pem = file_get_contents($real);
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return is_string($pem) ? $pem : '';
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}
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}
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