Protobuf的正逆向学习和基于python的实现
(编辑：jimmy 日期: 2024/11/16 浏览：3 次 )
1、起因
- 期初开始对https://cat-match.easygame2021.com/sheep/v1/game/game_over_ex/ 抓到的包，很好奇，MatchPlayInfo到底是个啥加密方式。
- 通过分析JS源码,找到一个叫做 Protbuf 的东西，头一次 接触，学了一下，如何用Python实现这个玩意，所以有了这篇文章，算是对学习protobuf的记录。
- 欢迎大佬批评指正。
{ "MatchPlayInfo" : "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", "Version" : "0.0.1", "MapSeed2" : "1666910531", "skin" : 1, "rank_time" : 144, "rank_role" : 1, "rank_state" : 1, "rank_score" : 1}
2、protobuf 是什么
protobuf是google提供的一个 开源序列化框架 ，类似于XML，JSON这样的数据表示语言，其最大的特点是 基于二进制 ，因此比传统的XML 表示高效短小得多。虽然是二进制数据格式，但并没有因此变得复杂，开发人员通过按照一定的语法定义结构化的消息格式，然后送给命令行工具，工具将自动生成 相关的类，可以支持php、java、c++、python等语言环境。通过将这些类包含在项目中，可以很轻松的调用相关方法来完成业务消息的序列化与反 序列化工作。
protobuf在google中是一个比较核心的基础库，作为分布式运算涉及到大量的不同业务消息的传递，如何高效简洁的表示、操作这些业务消息在 google这样的大规模应用中是至关重要的。而protobuf这样的库正好是在效率、数据大小、易用性之间取得了很好的平衡。
简单看来 就是一个序列化和反序列化工具。
3、protobuf 怎么用
正向：
- 定义一个.proto文件的message结构体
- 通过proto库提供的工具 生成所需语言的代码
- 通过生成的代码 进行加解密
逆向：
- 通过blackboxprotobuf工具对密文解码
- 通过读源码分析对应的参数
- 构造message结构体
- 通过生成的代码加解密
4、逆向实操
step1
对密文的预处理
- 通过源码可以看到，MatchPlayInfo是序列化后通过base64编码的
var N ={ rank_score: 1, rank_state: t, rank_time: this.countdown, rank_role: o, skin: r, MatchPlayInfo: S.default.base64_encode(b) };
需要下述将MatchPlayInfo中的内容先base64解码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
base64解码：import base64mydate = "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"out_b = base64.b64decode(mydata)
得到的就是protobuf序列化后的结果
b'\x08\x03"\x05\x08\x8a\x01\x10\x08"\x05\x08\x8b\x01\x10\x08"\x05\x08\x90\x01\x10\x08"\x05\x08\xd1\x01\x10\x05"………………
step2
使用blackboxprotobuf 对密文反序列化
- 安装blackboxprotobuf ， protobuf
pip install blackboxprotobuf protobuf
解析为jsonimport blackboxprotobufdeserialize_data, message_type = blackboxprotobuf.protobuf_to_json(out_b)print(f"原始数据: {deserialize_data}")print(f"消息类型: {message_type}")
得到结果：
原始数据: {"1": "3","4": [ { "1": "138","2": "8"},{"1": "139","2": "8"},{"1": "144","2": "8"},…………]}
消息类型: {'1': {'type': 'int', 'name': ''}, '4': {'type': 'message', 'message_typedef': {'1': {'type': 'int', 'name': ''}, '2': {'type': 'int', 'name': ''}}, 'name': ''}}
step3
分析源码构造message的.proto文件
源码：
MatchPlayInfo部分
o.MatchPlayInfo = function () { function t(t) { if (this.stepInfoList = [], t) for (var e = Object.keys(t), o = 0; o < e.length; ++o) null != t[e[o]] && (this[e[o]] = t[e[o]]); } return t.prototype.gameType = 0, t.prototype.mapId = 0, t.prototype.mapSeed = 0, t.prototype.stepInfoList = r.emptyArray, t.create = function (e) { return new t(e); }, t.encode = function (t, e) { if (e || (e = a.create()), null != t.gameType && Object.hasOwnProperty.call(t, "gameType") && e.uint32(8).int32(t.gameType), null != t.mapId && Object.hasOwnProperty.call(t, "mapId") && e.uint32(16).int32(t.mapId), null != t.mapSeed && Object.hasOwnProperty.call(t, "mapSeed") && e.uint32(24).int32(t.mapSeed), null != t.stepInfoList && t.stepInfoList.length) for (var o = 0; o < t.stepInfoList.length; ++o) c.protocol.MatchStepInfo.encode(t.stepInfoList[o], e.uint32(34).fork()).ldelim(); return e; }, t.decode = function (t, e) { t instanceof i || (t = i.create(t)); for (var o = void 0 === e ? t.len : t.pos + e, n = new c.protocol.MatchPlayInfo(); t.pos < o;) { var a = t.uint32(); switch (a > 3) { case 1: n.gameType = t.int32(); break; case 2: n.mapId = t.int32(); break; case 3: n.mapSeed = t.int32(); break; case 4: n.stepInfoList && n.stepInfoList.length || (n.stepInfoList = []), n.stepInfoList.push(c.protocol.MatchStepInfo.decode(t, t.uint32())); break; default: t.skipType(7 & a); } } return n; }, t; }()
MatchStepInfo部分
o.MatchStepInfo = function () { function t(t) { if (t) for (var e = Object.keys(t), o = 0; o < e.length; ++o) null != t[e[o]] && (this[e[o]] = t[e[o]]); } return t.prototype.chessIndex = 0, t.prototype.timeTag = 0, t.create = function (e) { return new t(e); }, t.encode = function (t, e) { return e || (e = a.create()), null != t.chessIndex && Object.hasOwnProperty.call(t, "chessIndex") && e.uint32(8).int32(t.chessIndex), null != t.timeTag && Object.hasOwnProperty.call(t, "timeTag") && e.uint32(16).int32(t.timeTag), e; }, t.decode = function (t, e) { t instanceof i || (t = i.create(t)); for (var o = void 0 === e ? t.len : t.pos + e, n = new c.protocol.MatchStepInfo(); t.pos < o;) { var a = t.uint32(); switch (a > 3) { case 1: n.chessIndex = t.int32(); break; case 2: n.timeTag = t.int32(); break; default: t.skipType(7 & a); } } return n; }, t; }()
根据源码及解析结果构建.proto文件
syntax = 'proto3';message MatchPlayInfo{ int32 gameType = 1; int32 mapId = 2; int32 mapSeed = 3; repeated StepInfoList stepInfoList = 4;}message StepInfoList{ int32 chessIndex = 1; int32 timeTag = 2;}
存为 yang.proto文件
step4
通过.proto文件生成对应的python代码
- 安装grpcio-tools库
pip install grpcio-tools
- 终端运行 生成对应的 yang_pb2.py
python -m grpc_tools.protoc -I. --python_out=. --grpc_python_out=. yang.proto
step5
引用 yang_pb2.py 进行加解密
解密：
import yang_pb2mydata = "CAMiBQiKARAIIgUIiwEQCCIFCJABEAgiBQjRARAFIgUI0gEQBSIFCNMBEAUiBQi9ARAGIgUIvwEQBiIFCL4BEAYiBQijAhABIgUIpgIQASIFCKcCEAEiBQikAhABIgUIqAIQASIFCKUCEAEiBQibAhABIgUImAIQASIFCJoCEAEiBQiZAhABIgUIoQIQASIFCKICEAEiBQicAhABIgUInQIQASIFCJ8CEAEiBQieAhABIgUIoAIQASIFCJUCEAEiBQiJAhACIgUIigIQAiIFCIsCEAIiBQiMAhACIgUIjQIQAiIFCJQCEAIiBQiTAhACIgUIkgIQAiIFCJECEAIiBQiQAhACIgUIgAIQAiIFCIECEAIiBQiGAhACIgUIhQIQAiIFCIQCEAIiBQj5ARADIgUI+gEQAyIFCPsBEAMiBQj8ARADIgUI\/gEQAyIFCP8BEAMiBQjzARADIgUI9AEQAyIFCO0BEAMiBQjsARADIgUI6wEQAyIFCPIBEAMiBQjgARAEIgUI4QEQBCIFCOIBEAQiBQjmARAEIgUI3AEQBCIFCN0BEAQiBQjIARAFIgUIyQEQBSIFCNABEAUiBQjPARAFIgUI1AEQBSIFCMEBEAUiBQjAARAGIgUIswEQBiIFCLQBEAYiBAgwEA0iBAgxEA0iBAguEA0iBAgvEA0iBAglEA0iBAgmEA0iBAgiEA4iBAgjEA4iBAgkEA4iBAgXEA4iBAgYEA4iBAgZEA4iBQipARAHIgUIpwEQByIFCKgBEAciBAgGEA8iBAgFEA8iBAgJEA8iBAgIEA8iBAgHEA8iBAgLEA8iBQiWAhABIgUIhwIQAiIFCIgCEAIiBQiDAhACIgUI9QEQAyIFCPgBEAMiBQjxARADIgUI6gEQBCIFCNsBEAQiBQjfARAEIgUIlwIQASIFCI4CEAIiBQiPAhACIgUIggIQAiIFCPYBEAMiBQj9ARADIgUI9wEQAyIFCOcBEAQiBQjoARAEIgUI6QEQBCIFCNYBEAQiBQjeARAEIgUI5QEQBCIFCMIBEAUiBQjVARAFIgUIxwEQBSIFCLIBEAYiBQjuARADIgUI7wEQAyIFCPABEAMiBQjXARAEIgUI4wEQBCIFCOQBEAQiBQjYARAEIgUI2QEQBCIFCNoBEAQiBQjDARAFIgUIxAEQBSIFCMUBEAUiBQjGARAFIgUIygEQBSIFCM0BEAUiBQjLARAFIgUIzgEQBSIFCMwBEAUiBQi1ARAGIgUItgEQBiIFCLcBEAYiBQi4ARAGIgUIvAEQBiIFCLEBEAYiBQiwARAGIgUIuwEQBiIFCLoBEAYiBQivARAGIgUIrgEQBiIFCLkBEAYiBQiZARAHIgUImwEQByIFCKsBEAciBQiqARAHIgUInAEQByIFCJoBEAciBQieARAHIgUIoQEQByIFCJ8BEAciBQigARAHIgUIpAEQByIFCKYBEAciBQijARAHIgUIpQEQByIFCJgBEAciBQiMARAIIgUIjgEQCCIFCJUBEAgiBQiWARAIIgUIlAEQCCIFCJMBEAgiBQiFARAIIgUIgwEQCCIFCIcBEAgiBQiPARAIIgUIjQEQCCIFCIkBEAgiBQiCARAIIgUIrAEQBiIFCK0BEAYiBQidARAHIgUIlwEQByIFCKIBEAciBQiRARAIIgUIkgEQCCIECH8QCSIFCIEBEAkiBAh9EAkiBAgOEA8iBAgQEA8iBAgPEA8iBAh1EAkiBAh2EAkiBAh3EAkiBAh8EAkiBAhwEAkiBAhxEAkiBAh0EAkiBAh7EAkiBAhvEAkiBAhrEAoiBAhqEAoiBAhpEAoiBQiEARAIIgUIhgEQCCIFCIgBEAgiBAhiEAoiBAhhEAoiBAhnEAoiBQiAARAJIgQIfhAJIgQIeRAJIgQIeBAJIgQIehAJIgQIchAJIgQIcxAJIgQIbhAJIgQIbRAJIgQIZhAKIgQIYxAKIgQIbBAKIgQIZBAKIgQIZRAKIgQIXRAKIgQIVhALIgQIWhALIgQIWRALIgQITxALIgQISRALIgQIUhALIgQIWxAKIgQIXBAKIgQIXhAKIgQIQxAMIgQIRBAMIgQIPRAMIgQIVBALIgQIVRALIgQIUxALIgQIThALIgQITBALIgQITRALIgQIRxAMIgQIOxAMIgQIPBAMIgQINBANIgQIMxANIgQINRANIgQISBAMIgQIQhAMIgQIOhAMIgQIJxANIgQIMhANIgQIKRANIgQIKBANIgQIHRAOIgQIHBAOIgQIGxAOIgQIEhAPIgQIERAPIgQIDRAPIgQIXxAKIgQIaBAKIgQIYBAKIgQIWBALIgQIVxALIgQIURALIgQIUBALIgQISxALIgQIShALIgQIRhAMIgQIRRAMIgQIPxAMIgQIPhAMIgQINxAMIgQIQRAMIgQIQBAMIgQIORAMIgQIOBAMIgQINhANIgQILRANIgQILBANIgQIIBAOIgQIIRAOIgQIGhAOIgQIKhANIgQIKxANIgQIExAOIgQIHxAOIgQIFhAOIgQIHhAOIgQIBBAPIgQIFBAOIgQIFRAOIgQIAhAPIgQIAxAPIgQIARAPIgQIDBAPIgQIChAPIgQIABAB"out_b = base64.b64decode(mydata)matchPlayInfo_out = yang_pb2.MatchPlayInfo()matchPlayInfo_out.ParseFromString(out_b)print(matchPlayInfo_out)
打印结果：
gameType: 3stepInfoList { chessIndex: 138 timeTag: 8}stepInfoList { chessIndex: 139 timeTag: 8}stepInfoList { chessIndex: 144 timeTag: 8}stepInfoList { chessIndex: 209 timeTag: 5}………………
构造加密：
improt yang_pb2matchPlayInfo=yang_pb2.MatchPlayInfo()matchPlayInfo.gameType=3stepInfoList = yang_pb2.StepInfoList()for i in range(1,297): stepInfoList.chessIndex=i stepInfoList.timeTag=i matchPlayInfo.stepInfoList.append(stepInfoList)out_b = matchPlayInfo.SerializeToString()
out_b结果：
b'\x08\x03"\x04\x08\x01\x10\x01"\x04\x08\x02\x10\x02"\x04\x08\x03\x10\x03"\x04\x08\x04\x10\x04"\x04\x08\x05\x10\x05"\…………
对out_b进行base64编码即得到结果
b64out_b = base64.b64encode(out_b)print(b64out_b)
b'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'
用上述的解密方法对构造的加密解密：
matchPlayInfo_out = yang_pb2.MatchPlayInfo()matchPlayInfo_out.ParseFromString(out_b)print(matchPlayInfo_out)
matchPlayInfo_out结果：
gameType: 3stepInfoList { chessIndex: 1 timeTag: 1}stepInfoList { chessIndex: 2 timeTag: 2}stepInfoList { chessIndex: 3 timeTag: 3}stepInfoList { chessIndex: 4 timeTag: 4}…………stepInfoList { chessIndex: 295 timeTag: 295}stepInfoList { chessIndex: 296 timeTag: 296}
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