支付宝签名修改

platformapi/alipayapi/utils.go

@@ -41,6 +41,17 @@ func (a *API) SystemAuthToken(grantType, code, refreshToken string) (tokenInfo *
 	if refreshToken != "" {
 		params["refresh_token"] = refreshToken
 	}
+
+	// 获取证书
+	appCertSN, aliPayRootCertSN, aliPayPublicCertSN, err := SetCertSnByPath(appCertPath, aliPayRootCertPath, AliPayPublicCertPath)
+	if err != nil {
+		return nil, err
+	}
+
+	params["app_cert_sn"] = appCertSN
+	params["alipay_public_cert_sn"] = aliPayPublicCertSN
+	params["alipay_root_cert_sn"] = aliPayRootCertSN
+
 	retVal, err := a.AccessAPI("alipay.system.oauth.token", params, nil, false)
 	if err == nil {
 		err = utils.Map2StructByJson(retVal, &tokenInfo, false)