iOS逆向之某多多App抓包

阅读此文档的过程中遇到任何问题，请关注公众号【移动端Android和iOS开发技术分享】或加QQ群【309580013】

1.目标

由于某多多App现使用longlink进行数据传输，使用charles工具抓包只能抓到https://th.pinduoduo.com/t.gif链接。本文的目则是使用charles等抓包工具能正常抓包

2.操作环境

• 越狱iPhone一台
• frida

3.流程

下载最新某多多App。关键词longlink则是我们的切入点，在终端执行frida-trace -U -f com.xunmeng.pinduoduo -m "*[* *ong*ink*]" -M "*[UI* *]" -M "*[_* *]"命令后获取到关键信息列表：

+[AMTitanHelper makesureLongLinkConnect:]: Loaded handler at "/Users/witchan/__handlers__/AMTitanHelper/makesureLongLinkConnect_.js"
-[AMTitanLongLinkInfoManager updateLongLinkStatusInfoWithHost:longLinkStatus:longLinkInfo:]: Loaded handler at "/Users/witchan/__handlers__/AMTitanLongLinkInfoManager/updateLongLinkStatusInfoWithHost_663278c1.js"
-[AMTitanLongLinkInfoManager longLinkStatusInfoDic]: Loaded handler at "/Users/witchan/__handlers__/AMTitanLongLinkInfoManager/longLinkStatusInfoDic.js"
-[AMTitanLongLinkInfoManager setLongLinkStatusInfoDic:]: Loaded handler at "/Users/witchan/__handlers__/AMTitanLongLinkInfoManager/setLongLinkStatusInfoDic_.js"
-[PDDProbeRaceManager longLinkRaceResult:traceId:reportBlock:callback:]: Loaded handler at "/Users/witchan/__handlers__/PDDProbeRaceManager/longLinkRaceResult_traceId_repor_9af8c15b.js"
-[AMTitanNetworkConfig setLonglinkHostConfig:]: Loaded handler at "/Users/witchan/__handlers__/AMTitanNetworkConfig/setLonglinkHostConfig_.js"
-[AMTitanNetworkConfig longlinkHostConfig]: Loaded handler at "/Users/witchan/__handlers__/AMTitanNetworkConfig/longlinkHostConfig.js"
+[PDDNetworkHybrid longLinkErrorCodeMap]: Loaded handler at "/Users/witchan/__handlers__/PDDNetworkHybrid/longLinkErrorCodeMap.js"
-[PddRtc titan:didChangeToConnectionStatus:longLinkInfo:]: Loaded handler at "/Users/witchan/__handlers__/PddRtc/titan_didChangeToConnectionStatu_745d0013.js"
-[PDDWebConfig htmlLongLinkWhiteListFromConfig]: Loaded handler at "/Users/witchan/__handlers__/PDDWebConfig/htmlLongLinkWhiteListFromConfig.js"
-[PDDWebConfig setHtmlLongLinkWhiteList:]: Loaded handler at "/Users/witchan/__handlers__/PDDWebConfig/setHtmlLongLinkWhiteList_.js"
-[PDDWebConfig htmlLongLinkWhiteList]: Loaded handler at "/Users/witchan/__handlers__/PDDWebConfig/htmlLongLinkWhiteList.js"
-[PDDWebViewManager pdd_setProtocolLongLinkEnable:]: Loaded handler at "/Users/witchan/__handlers__/PDDWebViewManager/pdd_setProtocolLongLinkEnable_.js"
-[PDDLiveRoomMicLinkManager registerLongLinkMsgCenter]: Loaded handler at "/Users/witchan/__handlers__/PDDLiveRoomMicLinkManager/registerLongLinkMsgCenter.js"
+[PDDTitanNetworkConfig mainLongLinkBackupIps]: Loaded handler at "/Users/witchan/__handlers__/PDDTitanNetworkConfig/mainLongLinkBackupIps.js"
+[PDDTitanNetworkConfig multicastLongLinkBackupIps]: Loaded handler at "/Users/witchan/__handlers__/PDDTitanNetworkConfig/multicastLongLinkBackupIps.js"
-[AMNetworkInfoManager longLinkInfo]: Loaded handler at "/Users/witchan/__handlers__/AMNetworkInfoManager/longLinkInfo.js"
-[AMNetworkInfoManager setLongLinkInfo:]: Loaded handler at "/Users/witchan/__handlers__/AMNetworkInfoManager/setLongLinkInfo_.js"
+[AMNetworkInfo longLinkInfo]: Loaded handler at "/Users/witchan/__handlers__/AMNetworkInfo/longLinkInfo.js"
+[AMNetworkInfo setLongLinkInfo:]: Loaded handler at "/Users/witchan/__handlers__/AMNetworkInfo/setLongLinkInfo_.js"
-[AMHTTPRequest longLinkDowngrade]: Loaded handler at "/Users/witchan/__handlers__/AMHTTPRequest/longLinkDowngrade.js"
-[AMHTTPRequest setLongLinkDowngrade:]: Loaded handler at "/Users/witchan/__handlers__/AMHTTPRequest/setLongLinkDowngrade_.js"
-[PDDAntManager titan:didChangeToConnectionStatus:longLinkInfo:]: Loaded handler at "/Users/witchan/__handlers__/PDDAntManager/titan_didChangeToConnectionStatu_745d0013.js"
-[PDDApiMetricsBaseInfo setIsLongLinkReceived:]: Loaded handler at "/Users/witchan/__handlers__/PDDApiMetricsBaseInfo/setIsLongLinkReceived_.js"
-[PDDApiMetricsBaseInfo setLongLinkVip:]: Loaded handler at "/Users/witchan/__handlers__/PDDApiMetricsBaseInfo/setLongLinkVip_.js"
-[PDDApiMetricsBaseInfo setLongLinkErrorCode:]: Loaded handler at "/Users/witchan/__handlers__/PDDApiMetricsBaseInfo/setLongLinkErrorCode_.js"
-[PDDApiMetricsBaseInfo setLongLinkType:]: Loaded handler at "/Users/witchan/__handlers__/PDDApiMetricsBaseInfo/setLongLinkType_.js"
-[PDDApiMetricsBaseInfo isLongLinkReceived]: Loaded handler at "/Users/witchan/__handlers__/PDDApiMetricsBaseInfo/isLongLinkReceived.js"
-[PDDApiMetricsBaseInfo longLinkVip]: Loaded handler at "/Users/witchan/__handlers__/PDDApiMetricsBaseInfo/longLinkVip.js"
-[PDDApiMetricsBaseInfo longLinkErrorCode]: Loaded handler at "/Users/witchan/__handlers__/PDDApiMetricsBaseInfo/longLinkErrorCode.js"
-[PDDApiMetricsBaseInfo longLinkType]: Loaded handler at "/Users/witchan/__handlers__/PDDApiMetricsBaseInfo/longLinkType.js"
-[PDDApiMetricsCostInfo setLongLinkSendCost:]: Loaded handler at "/Users/witchan/__handlers__/PDDApiMetricsCostInfo/setLongLinkSendCost_.js"
-[PDDApiMetricsCostInfo setLongLinkRecvCost:]: Loaded handler at "/Users/witchan/__handlers__/PDDApiMetricsCostInfo/setLongLinkRecvCost_.js"
-[PDDApiMetricsCostInfo setLongLinkServerCost:]: Loaded handler at "/Users/witchan/__handlers__/PDDApiMetricsCostInfo/setLongLinkServerCost_.js"
-[PDDApiMetricsCostInfo longLinkSendCost]: Loaded handler at "/Users/witchan/__handlers__/PDDApiMetricsCostInfo/longLinkSendCost.js"
-[PDDApiMetricsCostInfo longLinkRecvCost]: Loaded handler at "/Users/witchan/__handlers__/PDDApiMetricsCostInfo/longLinkRecvCost.js"
-[PDDApiMetricsCostInfo setLongLinkNetworkCost:]: Loaded handler at "/Users/witchan/__handlers__/PDDApiMetricsCostInfo/setLongLinkNetworkCost_.js"
-[PDDApiMetricsCostInfo longLinkServerCost]: Loaded handler at "/Users/witchan/__handlers__/PDDApiMetricsCostInfo/longLinkServerCost.js"
-[PDDApiMetricsCostInfo longLinkNetworkCost]: Loaded handler at "/Users/witchan/__handlers__/PDDApiMetricsCostInfo/longLinkNetworkCost.js"
-[PDDApiMetricsExtraInfo setLongLinkReportCode:]: Loaded handler at "/Users/witchan/__handlers__/PDDApiMetricsExtraInfo/setLongLinkReportCode_.js"
-[PDDApiMetricsExtraInfo setLongLinkStatusCode:]: Loaded handler at "/Users/witchan/__handlers__/PDDApiMetricsExtraInfo/setLongLinkStatusCode_.js"
-[PDDApiMetricsExtraInfo setLongLinkTaskId:]: Loaded handler at "/Users/witchan/__handlers__/PDDApiMetricsExtraInfo/setLongLinkTaskId_.js"
-[PDDApiMetricsExtraInfo setLongLinkSendSize:]: Loaded handler at "/Users/witchan/__handlers__/PDDApiMetricsExtraInfo/setLongLinkSendSize_.js"
-[PDDApiMetricsExtraInfo setLonglinkReceiveSize:]: Loaded handler at "/Users/witchan/__handlers__/PDDApiMetricsExtraInfo/setLonglinkReceiveSize_.js"
-[PDDApiMetricsExtraInfo setLongLinkForeground:]: Loaded handler at "/Users/witchan/__handlers__/PDDApiMetricsExtraInfo/setLongLinkForeground_.js"
-[PDDApiMetricsExtraInfo setLongLinkUrl:]: Loaded handler at "/Users/witchan/__handlers__/PDDApiMetricsExtraInfo/setLongLinkUrl_.js"
-[PDDApiMetricsExtraInfo longLinkReportCode]: Loaded handler at "/Users/witchan/__handlers__/PDDApiMetricsExtraInfo/longLinkReportCode.js"
-[PDDApiMetricsExtraInfo longLinkStatusCode]: Loaded handler at "/Users/witchan/__handlers__/PDDApiMetricsExtraInfo/longLinkStatusCode.js"
-[PDDApiMetricsExtraInfo isLongLinkForeground]: Loaded handler at "/Users/witchan/__handlers__/PDDApiMetricsExtraInfo/isLongLinkForeground.js"
-[PDDApiMetricsExtraInfo longLinkSendSize]: Loaded handler at "/Users/witchan/__handlers__/PDDApiMetricsExtraInfo/longLinkSendSize.js"
-[PDDApiMetricsExtraInfo longlinkReceiveSize]: Loaded handler at "/Users/witchan/__handlers__/PDDApiMetricsExtraInfo/longlinkReceiveSize.js"
-[PDDApiMetricsExtraInfo longLinkTaskId]: Loaded handler at "/Users/witchan/__handlers__/PDDApiMetricsExtraInfo/longLinkTaskId.js"
-[PDDApiMetricsExtraInfo longLinkUrl]: Loaded handler at "/Users/witchan/__handlers__/PDDApiMetricsExtraInfo/longLinkUrl.js"
-[PDDApiWaitLonglinkConfig isWaitLonglink:method:]: Loaded handler at "/Users/witchan/__handlers__/PDDApiWaitLonglinkConfig/isWaitLonglink_method_.js"
-[AMTitan updateLongLinkHostWhiteList:]: Loaded handler at "/Users/witchan/__handlers__/AMTitan/updateLongLinkHostWhiteList_.js"
-[AMTitan updateLongLinkUriBlackList:]: Loaded handler at "/Users/witchan/__handlers__/AMTitan/updateLongLinkUriBlackList_.js"
-[AMTitan isLongLinkConnected]: Loaded handler at "/Users/witchan/__handlers__/AMTitan/isLongLinkConnected.js"
-[AMTitan makesureLongLinkConnect:]: Loaded handler at "/Users/witchan/__handlers__/AMTitan/makesureLongLinkConnect_.js"
-[AMTitan reportStatusChange:longLinkInfo:]: Loaded handler at "/Users/witchan/__handlers__/AMTitan/reportStatusChange_longLinkInfo_.js"
-[AMTitan onConnectStatusChange:longLinkStatus:longLinkInfo:]: Loaded handler at "/Users/witchan/__handlers__/AMTitan/onConnectStatusChange_longLinkSt_c4a1163e.js"
-[AMTitanBaseRequest setWaitLonglink:]: Loaded handler at "/Users/witchan/__handlers__/AMTitanBaseRequest/setWaitLonglink_.js"
-[AMTitanBaseRequest waitLonglink]: Loaded handler at "/Users/witchan/__handlers__/AMTitanBaseRequest/waitLonglink.js"
-[AMTitanStnCallback reportConnectStatus:longLinkStatus:longLinkInfo:]: Loaded handler at "/Users/witchan/__handlers__/AMTitanStnCallback/reportConnectStatus_longLinkStat_1d404d83.js"
-[AMTitanTask setWaitLonglink:]: Loaded handler at "/Users/witchan/__handlers__/AMTitanTask/setWaitLonglink_.js"
-[AMTitanTask waitLonglink]: Loaded handler at "/Users/witchan/__handlers__/AMTitanTask/waitLonglink.js"
+[AMTitanTransferUtil transferToLongLinkInfo:]: Loaded handler at "/Users/witchan/__handlers__/AMTitanTransferUtil/transferToLongLinkInfo_.js"

经过一层层筛查打印以上方法的入参和返回值，当修改到[AMTitan updateLongLinkHostWhiteList:]方法时，输出的日志参数，引起了我们的注意，updateLongLinkHostWhiteList_.js代码如下：

{
  onEnter(log, args, state) {
    log(`-[AMTitan updateLongLinkHostWhiteList:${new ObjC.Object(args[2])}]`);
  },
  onLeave(log, retval, state) {
    log(`-[AMTitan updateLongLinkHostWhiteList:]=${new ObjC.Object(retval)}=`);
  }
}

日志输出如下：

-[AMTitan updateLongLinkHostWhiteList:(
    "apiv2.yangkeduo.com",
    "apiv3.yangkeduo.com",
    "apiv4.yangkeduo.com",
    "apiv2.hutaojie.com",
    "meta.yangkeduo.com",
    "api.pinduoduo.com",
    "api.yangkeduo.com",
    "apiv5.yangkeduo.com",
    "mobile.yangkeduo.com",
    "meta.pinduoduo.com",
    "m.pinduoduo.net",
    "api-cj.pinduoduo.com",
    "api-isp.pinduoduo.com",
    "risk-data-clean-api.risk.ft.srv.pdd.net"
)]
-[AMTitan updateLongLinkHostWhiteList:]=(
    "apiv2.yangkeduo.com",
    "apiv3.yangkeduo.com",
    "apiv4.yangkeduo.com",
    "apiv2.hutaojie.com",
    "meta.yangkeduo.com",
    "api.pinduoduo.com",
    "api.yangkeduo.com",
    "apiv5.yangkeduo.com",
    "mobile.yangkeduo.com",
    "meta.pinduoduo.com",
    "m.pinduoduo.net",
    "api-cj.pinduoduo.com",
    "api-isp.pinduoduo.com",
    "risk-data-clean-api.risk.ft.srv.pdd.net"
)=

发现关键信息api*.yangkeduo.com，根据方法updateLongLinkHostWhiteList，发现这极有可能是LongLink的接口列表。修改刚的js代码为：

{
  onEnter(log, args, state) {
    args[2] = ObjC.classes.NSMutableArray.array(); // 修改入参为空数组
    log(`-[AMTitan updateLongLinkHostWhiteList:${new ObjC.Object(args[2])}]`);
  },
  onLeave(log, retval, state) {
    log(`-[AMTitan updateLongLinkHostWhiteList:]=${new ObjC.Object(retval)}=`);
  }
}

这时，抓包正常工作，结果如下：

End

阅读此文档的过程中遇到任何问题，请关注公众号【移动端Android和iOS开发技术分享】或加QQ群【309580013】