反向工程师HTTP请求

时间:2017-01-06 15:41:52

标签: reverse-engineering nsurlrequest

我截获了一封关于Charles的请求,该请求源自iPhone到Instagram,这里是标题

POST /logging_client_events HTTP/1.1
Host: graph.instagram.com
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
Connection: keep-alive
Accept: */*
User-Agent: Instagram 10.0.1 (iPhone8,1; iOS 10_1_1; en_IN; en-IN; en; scale=2.00; 750x1334) AppleWebKit/420+
Accept-Language: en-IN;q=1.0, hi-IN;q=0.9,
Content-Length: 1601
Accept-Encoding: gzip, deflate

在压缩的请求中也有Post数据。我的问题是如何解压Post数据?也许NSData中可以解压缩的任何方法?

编辑:这是完整的HTTP请求

POST /logging_client_events HTTP/1.1
Host: graph.instagram.com
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
Connection: keep-alive
Accept: */*
User-Agent: Instagram 10.3.0 (iPhone8,1; iOS 10_1_1; en_IN; en-IN; scale=2.00; gamut=normal; 750x1334) AppleWebKit/420+
Accept-Language: en-IN;q=1, hi-IN;q=0.9
Content-Length: 4585
Accept-Encoding: gzip, deflate

message=eNrtXG1v4kgS%2FiunfLqTAupXtzvSfiAxZInOZsmQEPt0sowxYGNj1jZDYLX326%2FaMBNICJMsZCajTUZRwO6XqvJT1c%2FTtuePE286dcP%2BydkJJgwRxgUjumCYnZyezMrjCD4VYRKcnGGmU0GIQKiKGEWUnZa9PweZ6o6qtIr%2B8U%2BmIYGEwP%2BCbv3gc%2BgH6%2BHPBdcb51rFuJCNCmsYuKJf6EZFq%2BlMN2pGDV0I6DLwkjBeuJs9Gb1gBqnXK3rDqFfAPKMi8UWtYvCaIKyGOZM16JkHeR6mk1Wf8xqqo4sGhuYNvcIouaicn2ukQhr8HLzQ5LlGlYFe4Z2c%2FeePkyTtz2JwUTkExyee8vdkHvTy1B8Hheunk0ngF65XFEEyLR6HRJOkyhETQp6eBPdFBoP%2BcTIdwxCE6IxSHWvs5M8%2FT5%2BbKBy6vwducD9N81kW7Bxdl4xvDD7M0tkUehZBXrhgZOjFysgCGrgQBD8Og4kys4zGhhGnT8xSg06DDCaEDqUpYZq7gyDou7NB6GZBP8jD4eRg8zmjz9h%2FgJm59zk40DJJBZI7LMvSOE5nhxq3CmSRpnERTh9ZujoFneJwEjzYnAVB7IIxCzdMptkK1bss1zHBSGxYXvYBT8NC9ThDu%2ByMQ7CpnMFPZ8pYaFX220of1vOQlJT3PU2ygAVSoCDQexj7cuB5PoGBklkB1j8ayXOfzjjycjdZlC3LNp%2FDYP605ySYPz4U5u6Xo%2BD3kUMnNKy%2Fy9BxRDgl6L0GjhCKtPcYOCw1LHWpi3cbOU0I%2Bh4jxwXXpIDL%2Bl4jR%2BHL%2B0xWiTSJEf3ekQsneeENMy9x02zoTULfzWe9b0WRYUQ2gpinswwYVjpwPX8VxyezJS5YiNXf8P6ZMH9JPqYLKAyA8cdE7KG1SwhCmoHrFUSpVmE65hXJiKzUmDwX9QuBGoZWzroekmANuCb0pPCLMMLu1jTghz8OJ0NYXMeBMj9YXC29bn9m311jP7kJW2Ez%2FPfF1dy%2Bi%2FMeaYyb0VQ0k3h5Rxozu3vP%2B5dx5GOJ%2FKQReeRWnUf%2B5DaGPkvn7orA76B%2FKTOny9RY95YxXFrLOrIMe2EZTTIw6siM6sSM%2FLnZsZG5rBPLqN2bRkM3oyazDHPZMuDYr3NiR7W5Y9jEurSxZViRc2mFrc7VuHXZntvLm3tzeTuyl6NRq9tcOJGN7ChO7ATmjBqh1akRK7LnLaMxhvMwvjW2E5s1w3nYv7udOhdNrRn53InaBNou7K4zbnXgcxfGTG4jJ2kvra6JreUNjNskZqe9AHsX1rIG47eXpe1GfW5%2BupLgu%2FIb4ihnzSjFg%2FYvvyhWrrjQ3AXUFbNcIaX8DsE%2FjHsBJoXcxQo79U%2BdQ8nr57AfpK4fxLHrzYp0GkPy92bDAWB52%2BiV1niwe831FYT9kTcZ7jZdSkz2sf3TjXGUlAgH4dYxlbLFYqomvOhce%2F0wrfk%2BZE4n8EeTNE6Hi18%2FGb%2FVngY4Dn2vWCX52uDYm038kTvLvV6801hJgVNsqoe1yxCw30bpJNBPMXRL85WMw1X1LZyEBaSWux48gZOYy6rATEisqbKn3H%2Fq9Zd%2BE8BL2QlxGFAirlP40TQQjT1IXHWlJ31XtT45G3hxHjx0VQUJqrfqrWFRFZqmC45AnGJNf2i1crdspUtcZYKXhjGuYfqCoE1n%2BQiMLOC6rE7BylAUCtK7AsigdG1Wz57XHwYwc5HNwHAvDrLi67dcefb1246aCZpZZdKuS1eO605mSU%2BJaii5sQf67snRzJt%2FNfdM7MnBfpgp2ToLXciSwU7XBCZiExuDMIMppx7gfu0CrCqzWKVXPishujMP1XpXLk299F7Ns4J2Fvw%2BUwq1nBaOpgXo1P4sW12MM03yPcZngRerjipVcj8Le8E%2B%2FS2FBgDbcORrd0j%2B0IfxZnmQVfo5qTwY%2Fj%2By05nHM09LgHgxHO8voKSFubrcJWz32F%2Fq8UnhxqnXD%2Fo7bdYZQZs2f%2BmyDt90lBbpTgs3x15F9wwyF2LAOWFSSp0gjT40g5WiGAFUONpj78N2Rz%2Fsu%2Bk02EEkaFVyjW9JgFfsczy9ojvCwqqUUV2KvcX1hRf3lUQ0CwYA9tEumxgVQtP32nQ0zjkHLrnOtcEs%2FpKGO5noptlfUDMJinmajU9eSkLl42HWcGJaWRtQ%2BaMh%2FojkHpPlQ3w5FpQ8z%2FLpj1OWXFAJRIXoj2k%2BfkWED6L5iRdOVqxmD0Kh%2FGl4u%2F7lJffw07ivVpysgDEKf7SzoKy4HRjcV1MDVd%2BXx%2BWmsbIujstKnu%2ByR6dsfw4PehvjQCUocf4XBdA%2BcPEqSDQh5VupH5iDalIyio6qfiB%2BkhMuIAmRjqi7Nc0u9bPF3JWK%2BaYamlixP3FiP5aoR4q4FyolUUctw6SgYEirY3Jr6egrxQDqxxhjM7qhoIIWpjGcm3S%2BMKMhKB%2BTKRUBimhhdYb3ZtSmLaOf2F2lgGrcItdjk0CbaBRb3Zt767IRgWpatDo3S%2BvyOjSN25G1HHOrcwuqyEdWtxFZl%2FW51QFldGkqu6eg1Ea9pJEHd9dTm1qD%2Fq9XIxtsVuoHPmPn04YaSurUvFRKChTU0kocpXK61siM%2Bgkoqhj%2BhjAfKn14zrfFlXyl%2BnkxWFdL4HS1Q78LrJJpfw2sL1PoquNq%2BjMCpIEzqm5eYCY1rn8I8J9ZgL9qw2i9dn2zdEqdvg6Nz1v7gNRduHwp8p6i%2FAOL3wuLB%2BgdXuVcl1sc5TC9owuNcK2U%2FRTUn%2FZKvfMCewWMLI9mL0NIMkkFCDRo9gJ5dhT6o1Up4tv3OF9Nf%2FYtLQQxSoSG9OOyH0AKXF%2FEKcKYcndzlh9BflirYzNraQMpMSHD60vr7jH5sbnTGUJmQmYvx3Oze4PtTj80gciYBLK0cx1bSXthL60I%2Fo1tYlKr40Sm0ZxDJcGQ%2FcRW5KdTh6rgjFQGty6b34P8PPXt06vJzwj0fKr2WhfJYP30gNrb29CBfpokwaSvzoBW%2FxZkCSF4r3pYPZ1CYIXgjAssHvagnjVl656RFw%2FTLCxGyVengix3H46%2BsXtQucgL%2FKOQBpQTTfBX%2BYd%2FuH8gsrWXXD8oA1AWQem8yj%2By7Z%2FarXQzbzJ%2B1r9XFX6tyiRQDXG0wg%2FsWpdclBtzmKoHpx5XfinfQEuIKpFcZ%2FhnEL5bmoRwXRMCwbKlCZ2QD1n8t5DFL9AjCtEaouJjK%2BcDs%2B8Cs%2FvByghUsoPASvaBdePxk%2BNhVehch%2FVYEPiCBIywMcsPgKrPAIZzuKRwTknsGgUJ%2FQiqFpDoxtjstplFmthOGqHT8e%2FtTmNkR6OxgoDVuQZJPeROtxG2jPHcAahanThRnxUdb3Vux3b3BjnGVWR2AeCdm%2B8A1R2%2BXfyYXUcB0lwAzfwJNOIGUcBVrHON6QgopA5Vln0oyJ9YQR6XJ3C12vKPPY8PxL4dYl8lKgGSsLSS4%2B0mIoAGI7S8QY8Zpk%2F3EzVMDng%2BT1fPkyB%2B%2FJc2wAd1KzyfppM8zSAFY68XxErkfw6y%2FKD3OfQqIUKQNzB6%2FThhmqkHqsrHC4P5NM3UNRkOD4SGXqVUbD1fduh2g0YkxuWDQAA89VbSqzbGvx1lxgEZ2ptAI1x7nrqjcDiK4bd4DhpHoT56lYNZVPsJWPoG9UFV9QCqDiuE2uAB1v7B4f8OHH4f59GrwBw0chDnYXs5j65qKxXiyKRHI5rOOdQqwojmbk3zHcHa%2F8p6LHXMuMGtzpibUXthTR6D9Ta0uzazI8VynLGdXIV2p4nUPgiwHdS6tACw1xGwHYBQY%2BR04XPHiR3DX9qJAqpJHWNIACwwd3PRMtrcSerfBKsDx31ykzcnt9jrtsHXq5G1PA%2FNxFZAXDqJuu%2FcgLma1Insewf%2B2pHPLaPGzNX9adZS96ujIbbAt1Zpsx0O7tCbsR5ZRYKgIy5t6gU5QAyQHqxID%2FtON1FlVTABMx%2BSXPzHJBfGnHDJOOLsfSTXPVTmBQAQaH8NP1kJLq9CVelNVdWXQ%2BokbSUxVHIxc9kGMI8XZqKSq87MLlT6y%2Fa93W1je3kFssOcW0lz6VzeLCDhIAmdEFYPkBW175ZcICXU5iMcv4EVq%2F3GyaVrkqMjSgoGDeQ6u7g4ZnI9T8HK%2F0%2BASibJz7BybXMwiBaVYLxAAutU%2F1jYfuaF7Rksqzdn1OszvsqDMqFyN1N3wrOnObnGsvjWywvr3usnnv97egIq8kvOrv7vBjf4vMqVPPgdoPbn%2FwGSB1Nz&compressed=1&access_token=124024574287414%7C84a456d620314b6e92a16d8ff1c792dc&format=json

2 个答案:

答案 0 :(得分:5)

TL; DR:使用以下命令行解码此类message

ipython -c "import zlib, base64, urllib; m='<message>';zlib.decompress(base64.decodestring(urllib.unquote(m)))"

用post参数替换<message>

完整详情:

此请求一个接一个地使用多个编码器,但所有使用的编码器都可以由经验丰富的研究人员和可能经验丰富的Web开发人员轻松识别。

通过消息POST参数中出现的字符,很容易识别格式base64 encoding。但是,百分比字符(%)脱颖而出,因为它们不属于base64字符集。进一步审核后,很容易看到百分号始终只有几个字符选择(%2B%2F)。这些是网址编码的字符(具体分别是&#39; +&#39;和&#39; /&#39;),这两个字符都是base64字符集的一部分。

因此,该字符串应该被urldecoded然后base64解码,结果我们最终得到一个更加神秘的字符串,但幸运的是没有错误:

x\xda\xed\\mo\xe2H\x12\xfe+\xa7|\xba\x93\x02\xeaW\xb7;\xd2~
<snip>

该字符串由可打印字符和不可打印字符组成,但前两个字符x\xda(或\x78\xda)具有重要意义,因为它们是{{3}的标记流。

例如,在您的邮件中运行该一行将完全如下:

nir$ ipython -c "import zlib, base64, urllib; m='eNrtXG1v4kgS%2FiunfLqTAupXtzvSfiAxZInOZsmQEPt0sowxYGNj1jZDYLX326%2FaMBNICJMsZCajTUZRwO6XqvJT1c%2FTtuePE286dcP%2BydkJJgwRxgUjumCYnZyezMrjCD4VYRKcnGGmU0GIQKiKGEWUnZa9PweZ6o6qtIr%2B8U%2BmIYGEwP%2BCbv3gc%2BgH6%2BHPBdcb51rFuJCNCmsYuKJf6EZFq%2BlMN2pGDV0I6DLwkjBeuJs9Gb1gBqnXK3rDqFfAPKMi8UWtYvCaIKyGOZM16JkHeR6mk1Wf8xqqo4sGhuYNvcIouaicn2ukQhr8HLzQ5LlGlYFe4Z2c%2FeePkyTtz2JwUTkExyee8vdkHvTy1B8Hheunk0ngF65XFEEyLR6HRJOkyhETQp6eBPdFBoP%2BcTIdwxCE6IxSHWvs5M8%2FT5%2BbKBy6vwducD9N81kW7Bxdl4xvDD7M0tkUehZBXrhgZOjFysgCGrgQBD8Og4kys4zGhhGnT8xSg06DDCaEDqUpYZq7gyDou7NB6GZBP8jD4eRg8zmjz9h%2FgJm59zk40DJJBZI7LMvSOE5nhxq3CmSRpnERTh9ZujoFneJwEjzYnAVB7IIxCzdMptkK1bss1zHBSGxYXvYBT8NC9ThDu%2ByMQ7CpnMFPZ8pYaFX220of1vOQlJT3PU2ygAVSoCDQexj7cuB5PoGBklkB1j8ayXOfzjjycjdZlC3LNp%2FDYP605ySYPz4U5u6Xo%2BD3kUMnNKy%2Fy9BxRDgl6L0GjhCKtPcYOCw1LHWpi3cbOU0I%2Bh4jxwXXpIDL%2Bl4jR%2BHL%2B0xWiTSJEf3ekQsneeENMy9x02zoTULfzWe9b0WRYUQ2gpinswwYVjpwPX8VxyezJS5YiNXf8P6ZMH9JPqYLKAyA8cdE7KG1SwhCmoHrFUSpVmE65hXJiKzUmDwX9QuBGoZWzroekmANuCb0pPCLMMLu1jTghz8OJ0NYXMeBMj9YXC29bn9m311jP7kJW2Ez%2FPfF1dy%2Bi%2FMeaYyb0VQ0k3h5Rxozu3vP%2B5dx5GOJ%2FKQReeRWnUf%2B5DaGPkvn7orA76B%2FKTOny9RY95YxXFrLOrIMe2EZTTIw6siM6sSM%2FLnZsZG5rBPLqN2bRkM3oyazDHPZMuDYr3NiR7W5Y9jEurSxZViRc2mFrc7VuHXZntvLm3tzeTuyl6NRq9tcOJGN7ChO7ATmjBqh1akRK7LnLaMxhvMwvjW2E5s1w3nYv7udOhdNrRn53InaBNou7K4zbnXgcxfGTG4jJ2kvra6JreUNjNskZqe9AHsX1rIG47eXpe1GfW5%2BupLgu%2FIb4ihnzSjFg%2FYvvyhWrrjQ3AXUFbNcIaX8DsE%2FjHsBJoXcxQo79U%2BdQ8nr57AfpK4fxLHrzYp0GkPy92bDAWB52%2BiV1niwe831FYT9kTcZ7jZdSkz2sf3TjXGUlAgH4dYxlbLFYqomvOhce%2F0wrfk%2BZE4n8EeTNE6Hi18%2FGb%2FVngY4Dn2vWCX52uDYm038kTvLvV6801hJgVNsqoe1yxCw30bpJNBPMXRL85WMw1X1LZyEBaSWux48gZOYy6rATEisqbKn3H%2Fq9Zd%2BE8BL2QlxGFAirlP40TQQjT1IXHWlJ31XtT45G3hxHjx0VQUJqrfqrWFRFZqmC45AnGJNf2i1crdspUtcZYKXhjGuYfqCoE1n%2BQiMLOC6rE7BylAUCtK7AsigdG1Wz57XHwYwc5HNwHAvDrLi67dcefb1246aCZpZZdKuS1eO605mSU%2BJaii5sQf67snRzJt%2FNfdM7MnBfpgp2ToLXciSwU7XBCZiExuDMIMppx7gfu0CrCqzWKVXPishujMP1XpXLk299F7Ns4J2Fvw%2BUwq1nBaOpgXo1P4sW12MM03yPcZngRerjipVcj8Le8E%2B%2FS2FBgDbcORrd0j%2B0IfxZnmQVfo5qTwY%2Fj%2By05nHM09LgHgxHO8voKSFubrcJWz32F%2Fq8UnhxqnXD%2Fo7bdYZQZs2f%2BmyDt90lBbpTgs3x15F9wwyF2LAOWFSSp0gjT40g5WiGAFUONpj78N2Rz%2Fsu%2Bk02EEkaFVyjW9JgFfsczy9ojvCwqqUUV2KvcX1hRf3lUQ0CwYA9tEumxgVQtP32nQ0zjkHLrnOtcEs%2FpKGO5noptlfUDMJinmajU9eSkLl42HWcGJaWRtQ%2BaMh%2FojkHpPlQ3w5FpQ8z%2FLpj1OWXFAJRIXoj2k%2BfkWED6L5iRdOVqxmD0Kh%2FGl4u%2F7lJffw07ivVpysgDEKf7SzoKy4HRjcV1MDVd%2BXx%2BWmsbIujstKnu%2ByR6dsfw4PehvjQCUocf4XBdA%2BcPEqSDQh5VupH5iDalIyio6qfiB%2BkhMuIAmRjqi7Nc0u9bPF3JWK%2BaYamlixP3FiP5aoR4q4FyolUUctw6SgYEirY3Jr6egrxQDqxxhjM7qhoIIWpjGcm3S%2BMKMhKB%2BTKRUBimhhdYb3ZtSmLaOf2F2lgGrcItdjk0CbaBRb3Zt767IRgWpatDo3S%2BvyOjSN25G1HHOrcwuqyEdWtxFZl%2FW51QFldGkqu6eg1Ea9pJEHd9dTm1qD%2Fq9XIxtsVuoHPmPn04YaSurUvFRKChTU0kocpXK61siM%2Bgkoqhj%2BhjAfKn14zrfFlXyl%2BnkxWFdL4HS1Q78LrJJpfw2sL1PoquNq%2BjMCpIEzqm5eYCY1rn8I8J9ZgL9qw2i9dn2zdEqdvg6Nz1v7gNRduHwp8p6i%2FAOL3wuLB%2BgdXuVcl1sc5TC9owuNcK2U%2FRTUn%2FZKvfMCewWMLI9mL0NIMkkFCDRo9gJ5dhT6o1Up4tv3OF9Nf%2FYtLQQxSoSG9OOyH0AKXF%2FEKcKYcndzlh9BflirYzNraQMpMSHD60vr7jH5sbnTGUJmQmYvx3Oze4PtTj80gciYBLK0cx1bSXthL60I%2Fo1tYlKr40Sm0ZxDJcGQ%2FcRW5KdTh6rgjFQGty6b34P8PPXt06vJzwj0fKr2WhfJYP30gNrb29CBfpokwaSvzoBW%2FxZkCSF4r3pYPZ1CYIXgjAssHvagnjVl656RFw%2FTLCxGyVengix3H46%2BsXtQucgL%2FKOQBpQTTfBX%2BYd%2FuH8gsrWXXD8oA1AWQem8yj%2By7Z%2FarXQzbzJ%2B1r9XFX6tyiRQDXG0wg%2FsWpdclBtzmKoHpx5XfinfQEuIKpFcZ%2FhnEL5bmoRwXRMCwbKlCZ2QD1n8t5DFL9AjCtEaouJjK%2BcDs%2B8Cs%2FvByghUsoPASvaBdePxk%2BNhVehch%2FVYEPiCBIywMcsPgKrPAIZzuKRwTknsGgUJ%2FQiqFpDoxtjstplFmthOGqHT8e%2FtTmNkR6OxgoDVuQZJPeROtxG2jPHcAahanThRnxUdb3Vux3b3BjnGVWR2AeCdm%2B8A1R2%2BXfyYXUcB0lwAzfwJNOIGUcBVrHON6QgopA5Vln0oyJ9YQR6XJ3C12vKPPY8PxL4dYl8lKgGSsLSS4%2B0mIoAGI7S8QY8Zpk%2F3EzVMDng%2BT1fPkyB%2B%2FJc2wAd1KzyfppM8zSAFY68XxErkfw6y%2FKD3OfQqIUKQNzB6%2FThhmqkHqsrHC4P5NM3UNRkOD4SGXqVUbD1fduh2g0YkxuWDQAA89VbSqzbGvx1lxgEZ2ptAI1x7nrqjcDiK4bd4DhpHoT56lYNZVPsJWPoG9UFV9QCqDiuE2uAB1v7B4f8OHH4f59GrwBw0chDnYXs5j65qKxXiyKRHI5rOOdQqwojmbk3zHcHa%2F8p6LHXMuMGtzpibUXthTR6D9Ta0uzazI8VynLGdXIV2p4nUPgiwHdS6tACw1xGwHYBQY%2BR04XPHiR3DX9qJAqpJHWNIACwwd3PRMtrcSerfBKsDx31ykzcnt9jrtsHXq5G1PA%2FNxFZAXDqJuu%2FcgLma1Insewf%2B2pHPLaPGzNX9adZS96ujIbbAt1Zpsx0O7tCbsR5ZRYKgIy5t6gU5QAyQHqxID%2FtON1FlVTABMx%2BSXPzHJBfGnHDJOOLsfSTXPVTmBQAQaH8NP1kJLq9CVelNVdWXQ%2BokbSUxVHIxc9kGMI8XZqKSq87MLlT6y%2Fa93W1je3kFssOcW0lz6VzeLCDhIAmdEFYPkBW175ZcICXU5iMcv4EVq%2F3GyaVrkqMjSgoGDeQ6u7g4ZnI9T8HK%2F0%2BASibJz7BybXMwiBaVYLxAAutU%2F1jYfuaF7Rksqzdn1OszvsqDMqFyN1N3wrOnObnGsvjWywvr3usnnv97egIq8kvOrv7vBjf4vMqVPPgdoPbn%2FwGSB1Nz'; zlib.decompress(base64.decodestring(urllib.unquote(m)))"

最终结果是:

{"app_id":"124024574287414","uid":"0","time":1483722700.043034,"app_ver":"10.3.0 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答案 1 :(得分:1)

您可以在php中使用gzuncompress

https://secure.php.net/manual/fr/function.gzuncompress.php

<?php
$compressed   = gzcompress('Compresse moi', 9); // or $compressed   = "YOUrcOmpreSSedStRINg";
$uncompressed = gzuncompress($compressed);
echo $uncompressed;
?>