猿人學web端爬蟲攻防大賽賽題第16題——js逆向 - window蜜罐

死不悔改奇男子發表於2024-11-02

Web爬蟲JS

題目網址：https://match.yuanrenxue.cn/match/16

解題步驟

看觸發資料包。
明顯m是經過特殊處理的，需要知道它的加密邏輯。看Initiator模組的window.request。
m和t的賦值就在上面，打斷點。先分析t。
r.t = p_s = Date[e(496)](new Date)[e(517)]()
將其中跟e相關的進行還原後，r.t = p_s = Date["parse"](new Date)["toString"]()，就是一個簡單的獲取時間戳。

分析m變數的生成。
r.m = n[e(528)](btoa, p_s)，還原後為r.m = n["WcFTW"](btoa, p_s)。
看下n["WcFTW"]是什麼，就是把第二個引數叫給第一個引數執行。

簡化一下就是r.m = btoa(p_s)，p_s就是時間戳，關鍵就是btoa函式，定位一下。

一長串，直接開始摳程式碼。

function btoa(e) {
	var t = u
		, r = {};
	r.TGmSp = t(244) + "ARACTER_ERR",
		r[t(238)] = t(224) + t(250) + "/",
		r[t(205)] = "^([^ ]+( +" + t(230) + t(259),
		r.aYkvo = function (e) {
			return e()
		}
		,
		r[t(254)] = function (e, t) {
			return e % t
		}
		,
		r.evetF = function (e, t) {
			return e >> t
		}
		,
		r.GfTek = t(196),
		r[t(260)] = function (e, t) {
			return e << t
		}
		,
		r[t(229)] = function (e, t) {
			return e | t
		}
		,
		r[t(242)] = function (e, t) {
			return e << t
		}
		,
		r[t(228)] = function (e, t) {
			return e & t
		}
		,
		r[t(207)] = function (e, t) {
			return e << t
		}
		,
		r[t(202)] = function (e, t) {
			return e & t
		}
		,
		r.jdwcO = function (e, t) {
			return e === t
		}
		,
		r.kPdGe = t(231),
		r[t(195)] = t(213),
		r[t(201)] = function (e, t) {
			return e & t
		}
		,
		r[t(206)] = function (e, t) {
			return e == t
		}
		,
		r[t(219)] = function (e, t) {
			return e + t
		}
		,
		r[t(220)] = function (e, t) {
			return e(t)
		}
	;
	var i = r;
	if (/([^\u0000-\u00ff])/.test(e))
		throw new Error(i.TGmSp);
	for (var o, a, s, l = 0, c = []; l < e[t(261)];) {
		switch (a = e[t(237)](l),
			s = i.kukBH(l, 6)) {
			case 0:
				delete window,
					delete document,
					c[t(246)](f[t(245)](i[t(212)](a, 2)));
				break;
			case 1:
				try {
					"WhHMm" === i[t(198)] || n.g && c[t(246)](f[t(245)](i.pHtmC(2 & o, 3) | i.evetF(a, 4)))
				} catch (e) {
					c[t(246)](f[t(245)](i[t(229)](i.cVCcp(3 & o, 4), a >> 4)))
				}
				break;
			case 2:
				c[t(246)](f[t(245)](i[t(229)](i[t(242)](15 & o, 2), i.evetF(a, 6)))),
					c[t(246)](f[t(245)](i[t(228)](a, 63)));
				break;
			case 3:
				c[t(246)](f[t(245)](i[t(212)](a, 3)));
				break;
			case 4:
				c.push(f[t(245)](i[t(229)](i[t(207)](i.OWUOc(o, 4), 6), i[t(212)](a, 6))));
				break;
			case 5:
				c[t(246)](f[t(245)](i[t(229)](i[t(207)](i[t(202)](o, 15), 4), a >> 8))),
					c.push(f.charAt(i[t(202)](a, 63)))
		}
		o = a,
			l++
	}
	return 0 == s ? i[t(226)](i[t(241)], i[t(195)]) || (c[t(246)](f[t(245)](i[t(201)](o, 3) << 4)),
		c.push("FM")) : i.eMnqD(s, 1) && (c[t(246)](f[t(245)]((15 & o) << 2)),
		c[t(246)]("K")),
		i[t(219)](i.aQCDK(d(15), window.md5(c[t(234)](""))), i[t(220)](d, 10))
}

let p_s = Date["parse"](new Date)["toString"]();
console.log(btoa(p_s));

執行報錯，提示u未定義。

找到u的定位處，補上程式碼。

再次執行，提示_0x34e7未定義。

再去找，補全程式碼。

再次執行，提示我們i.eMnqD不是一個方法。

在頁面輸出一下，是一個判斷變數是否相等的函式。

在我們自己的程式碼裡輸出一下，發現i.eMnqD未定義。

往上看到i等於r，看來是r變數出了問題。

輸出一下r。

發現頁面的r和我們得到的r的值不一樣，r的賦值跟t相關也就是u函式相關。

隨便輸出一個t(244)，我們自己得到的也跟頁面不一致。

看來是跟_0x34e7有關係了，再輸出一下_0x34e7。

發現順序完全不一致，看來根源就在_0x34e7這裡，將其重新賦值為頁面輸出的值，再執行，提示f未定義。

去找f的定義，直接在程式碼中加上f的值即可。

再執行，提示d未定義。

再去找，直接新增上關於d的程式碼。

再執行，提示window未定義。

這個問題，直接關注window.md5(c[t(234)](""))即可，儘量不要有window。c[t(234)的值為join函式。

關注window.md5的值，找其定義。

補全程式碼，再次執行，儘量將window.md5換一個名字，我這裡換成了md5。再執行，提示n未定義。

找定義，補全。

再執行，提示_0x4c28未定義。

直接在控制檯輸出，補全。

再次執行，終於得到結果了。

開始寫程式碼爬取頁面資料了。
test.js

var _0x34e7 = [
	"split",
	"ABHICESQWK",
	"FKByN",
	"U987654321",
	"lmHcG",
	"dICfr",
	"Szksx",
	"Bgrij",
	"iwnNJ",
	"jihgfdecba",
	"GfTek",
	"gfdecbaZXY",
	"constructo",
	"QIoXW",
	"jLRMs",
	"AqLWq",
	"0zyxwvutsr",
	"TKgNw",
	"eMnqD",
	"thjIz",
	"btoa",
	"MNPQRSTWXY",
	"oPsqh",
	"niIlq",
	"evetF",
	"LVZVH",
	"fYWEX",
	"kmnprstwxy",
	"aYkvo",
	"tsrqpomnlk",
	"HfLqY",
	"aQCDK",
	"lGBLj",
	"test",
	"3210zyxwvu",
	"QWK2Fi",
	"return /\" ",
	"hsJtK",
	"jdwcO",
	"SlFsj",
	"OWUOc",
	"LCaAn",
	"[^ ]+)+)+[",
	"FAVYf",
	"2Fi+987654",
	"floor",
	"join",
	"EuwBW",
	"OXYrZ",
	"charCodeAt",
	"SkkHG",
	"iYuJr",
	"GwoYF",
	"kPdGe",
	"cVCcp",
	"INQRH",
	"INVALID_CH",
	"charAt",
	"push",
	"apply",
	"lalCJ",
	"kTcRS",
	"+ this + \"",
	"ykpOn",
	"gLnjm",
	"gmBaq",
	"kukBH",
	"dvEWE",
	"SFKLi",
	"^([^ ]+( +",
	"qpomnlkjih",
	"^ ]}",
	"pHtmC",
	"length"
];

var u = function (e, t) {
	return _0x34e7[e -= 188]
};

function d(e) {
	var t = u
		, n = {};
	n[t(214)] = function (e, t) {
		return e || t
	}
		,
		n.bWcgB = function (e, t) {
			return e * t
		}
		,
		n[t(227)] = "ABCDEFGHJK" + t(209) + "Zabcdefhij" + t(215) + "z2345678";
	for (var r = n, o = "1|3|0|4|2|5"[t(188)]("|"), a = 0; ;) {
		switch (o[a++]) {
			case "0":
				var s = l[t(261)];
				continue;
			case "1":
				e = r[t(214)](e, 32);
				continue;
			case "2":
				for (i = 0; i < e; i++)
					c += l[t(245)](Math[t(233)](r.bWcgB(Math.random(), s)));
				continue;
			case "3":
				var l = r[t(227)];
				continue;
			case "4":
				var c = "";
				continue;
			case "5":
				return c
		}
		break
	}
}

var _0x4c28 = [
	"Rtsed",
	"SUrST",
	"nsaps",
	"vyNVU",
	"2|29|23|64",
	"0|43|57|4|",
	"NNXUu",
	"nCrbn",
	"wQPIq",
	"XBcOb",
	"39|40|47|6",
	"ljkOt",
	"yMPhx",
	"TXzzv",
	"0123456789",
	"fmdcS",
	"iXQwu",
	"grCxb",
	"3|6|1|4|7|",
	"wKeAM",
	"Iekey",
	"opqrstuvwx",
	"|7|17",
	"BQgZQ",
	"BtzmV",
	"jZUAt",
	"HYhpy",
	"Yvoqt",
	"VyzBI",
	"NNVLf",
	"dbmfK",
	"0|58|16|32",
	"UAFHv",
	"WNIsZ",
	"2|1|4|3|5|",
	"JFqRJ",
	"zObVA",
	"d24fb0d696",
	"XfWkD",
	"MFmWH",
	"lZISZ",
	"WzbFA",
	"kaQlD",
	"3f7d28e17f",
	"eSwEi",
	"YpeFX",
	"kZhzK",
	"KxKIe",
	"LAIPf",
	"LjyKQ",
	"YLwOK",
	"iqfMz",
	"51|8|0|65|",
	"JRihE",
	"nqEyg",
	"|37|22|27|",
	"ZXsFi",
	"goEwl",
	"|31|63|48|",
	"wvVCN",
	"wnDlW",
	"Myvqp",
	"UlhBp",
	"fwCDC",
	"charAt",
	"Lmhlz",
	"WQCAS",
	"UXeVn",
	"KIXRL",
	"HiEZt",
	"WNzfT",
	"lNWda",
	"tsNzQ",
	"18|38|15|2",
	"ucisR",
	"wWwRM",
	"LzcOo",
	"yWGcu",
	"PlAEw",
	"ihcci",
	"hBKtU",
	"rvloG",
	"xcQTI",
	"uhJgH",
	"vRqUp",
	"EQEzR",
	"abc",
	"QgSUn",
	"0|45|44|19",
	"WMqBp",
	"koePJ",
	"jGSEC",
	"IKbhW",
	"wEOgn",
	"|49|71|11|",
	"xgzfr",
	"ABCDEF",
	"DdHPB",
	"aFxRD",
	"sFtiw",
	"concat",
	"YhaCC",
	"YVBwM",
	"abYok",
	"2|28|6|36|",
	"NLOsy",
	"bRLIN",
	"xGAWc",
	"length",
	"zYRlD",
	"14|67|61|3",
	"bolvy",
	"pagBT",
	"mdsJQ",
	"4|69|41|26",
	"kaXPV",
	"IWxBE",
	"pviAr",
	"5|0|2",
	"lvwPz",
	"YcDFe",
	"yGmJD",
	"FcYqi",
	"AAZoR",
	"|46|5|3|50",
	"PnITs",
	"ABCDEFGHIJ",
	"charCodeAt",
	"KLMNOPQRST",
	"prrXX",
	"FDiNG",
	"split",
	"oBesn",
	"9|24|10|56",
	"VaXsK",
	"fromCharCo",
	"FDfcp",
	"rrdPR",
	"HHkBN",
	"89+/",
	"mfuQZ",
	"PbrnX",
	"FcXlo",
	"rNapo",
	"fEXNi",
	"qtIDJ",
	"60|53|21|5"
];

var n = function (e, t) {
	return _0x4c28[e -= 0]
};

md5 = function (e) {
	var t = n
		, r = {
		fEXNi: function (e, t) {
			return e(t)
		},
		LzcOo: function (e, t, n) {
			return e(t, n)
		}
	};
	r[t(3)] = function (e, t) {
		return e(t)
	}
		,
		r.wEOgn = function (e, t, n) {
			return e(t, n)
		}
		,
		r[t(120)] = function (e, t, n) {
			return e(t, n)
		}
		,
		r[t(69)] = function (e, t) {
			return e == t
		}
		,
		r[t(109)] = function (e, t) {
			return e(t)
		}
		,
		r[t(112)] = t(86),
		r.oBesn = "900150983c" + t(37) + t(43) + "72",
		r[t(70)] = t(18) + t(118),
		r[t(16)] = function (e, t) {
			return e < t
		}
		,
		r[t(2)] = t(110) + t(5) + t(133) + "|55|13|12|" + t(146) + t(114) + t(94) + "35|68|33|4" + t(104) + t(52) + t(73) + t(88) + t(55) + "25|34|1|2|" + t(10) + t(4) + t(124) + t(58) + "52|59|66|7" + t(31) + t(22),
		r[t(53)] = function (e, t, n, r, i, o, a, s) {
			return e(t, n, r, i, o, a, s)
		}
		,
		r[t(35)] = function (e, t) {
			return e + t
		}
		,
		r[t(141)] = function (e, t, n, r, i, o, a, s) {
			return e(t, n, r, i, o, a, s)
		}
		,
		r[t(91)] = function (e, t, n, r, i, o, a, s) {
			return e(t, n, r, i, o, a, s)
		}
		,
		r[t(65)] = function (e, t) {
			return e + t
		}
		,
		r[t(38)] = function (e, t, n, r, i, o, a, s) {
			return e(t, n, r, i, o, a, s)
		}
		,
		r[t(19)] = function (e, t) {
			return e + t
		}
		,
		r[t(117)] = function (e, t, n) {
			return e(t, n)
		}
		,
		r[t(92)] = function (e, t) {
			return e + t
		}
		,
		r[t(82)] = function (e, t) {
			return e + t
		}
		,
		r[t(111)] = function (e, t, n) {
			return e(t, n)
		}
		,
		r[t(78)] = function (e, t) {
			return e + t
		}
		,
		r.lZISZ = function (e, t, n, r, i, o, a, s) {
			return e(t, n, r, i, o, a, s)
		}
		,
		r.Iekey = function (e, t, n, r, i, o, a, s) {
			return e(t, n, r, i, o, a, s)
		}
		,
		r.AAZoR = function (e, t) {
			return e + t
		}
		,
		r[t(67)] = function (e, t, n, r, i, o, a, s) {
			return e(t, n, r, i, o, a, s)
		}
		,
		r.UlhBp = function (e, t) {
			return e + t
		}
		,
		r.yMPhx = function (e, t, n, r, i, o, a, s) {
			return e(t, n, r, i, o, a, s)
		}
		,
		r[t(138)] = function (e, t) {
			return e + t
		}
		,
		r[t(121)] = function (e, t) {
			return e + t
		}
		,
		r[t(98)] = function (e, t, n) {
			return e(t, n)
		}
		,
		r.kHuTw = function (e, t, n, r, i, o, a, s) {
			return e(t, n, r, i, o, a, s)
		}
		,
		r[t(50)] = function (e, t, n, r, i, o, a, s) {
			return e(t, n, r, i, o, a, s)
		}
		,
		r[t(142)] = function (e, t, n, r, i, o, a, s) {
			return e(t, n, r, i, o, a, s)
		}
		,
		r[t(87)] = function (e, t) {
			return e + t
		}
		,
		r[t(90)] = function (e, t) {
			return e + t
		}
		,
		r[t(59)] = function (e, t, n, r, i, o, a, s) {
			return e(t, n, r, i, o, a, s)
		}
		,
		r[t(28)] = function (e, t) {
			return e + t
		}
		,
		r[t(119)] = function (e, t) {
			return e + t
		}
		,
		r.YpeFX = function (e, t) {
			return e + t
		}
		,
		r[t(7)] = function (e, t, n, r, i, o, a, s) {
			return e(t, n, r, i, o, a, s)
		}
		,
		r.prrXX = function (e, t) {
			return e + t
		}
		,
		r.kaQlD = function (e, t) {
			return e + t
		}
		,
		r.qtIDJ = function (e, t, n, r, i, o, a, s) {
			return e(t, n, r, i, o, a, s)
		}
		,
		r.xGAWc = function (e, t) {
			return e + t
		}
		,
		r[t(134)] = function (e, t, n, r, i, o, a, s) {
			return e(t, n, r, i, o, a, s)
		}
		,
		r[t(89)] = function (e, t) {
			return e + t
		}
		,
		r[t(15)] = function (e, t, n, r, i, o, a, s) {
			return e(t, n, r, i, o, a, s)
		}
		,
		r[t(9)] = function (e, t) {
			return e + t
		}
		,
		r[t(56)] = function (e, t) {
			return e + t
		}
		,
		r[t(6)] = function (e, t, n, r, i, o, a, s) {
			return e(t, n, r, i, o, a, s)
		}
		,
		r[t(32)] = function (e, t) {
			return e + t
		}
		,
		r[t(99)] = function (e, t, n, r, i, o, a, s) {
			return e(t, n, r, i, o, a, s)
		}
		,
		r[t(39)] = function (e, t) {
			return e + t
		}
		,
		r[t(113)] = function (e, t, n, r, i, o, a, s) {
			return e(t, n, r, i, o, a, s)
		}
		,
		r[t(106)] = function (e, t, n, r, i, o, a, s) {
			return e(t, n, r, i, o, a, s)
		}
		,
		r[t(66)] = function (e, t, n, r, i, o, a, s) {
			return e(t, n, r, i, o, a, s)
		}
		,
		r.TXzzv = function (e, t) {
			return e + t
		}
		,
		r.NNVLf = function (e, t, n, r, i, o, a, s) {
			return e(t, n, r, i, o, a, s)
		}
		,
		r[t(79)] = function (e, t) {
			return e + t
		}
		,
		r[t(1)] = function (e, t, n, r, i, o, a, s) {
			return e(t, n, r, i, o, a, s)
		}
		,
		r[t(81)] = function (e, t) {
			return e + t
		}
		,
		r.MXnIN = function (e, t) {
			return e >> t
		}
		,
		r[t(23)] = function (e, t) {
			return e << t
		}
		,
		r.nqEyg = function (e, t) {
			return e % t
		}
		,
		r.kaXPV = function (e, t) {
			return e >>> t
		}
		,
		r[t(24)] = function (e, t, n) {
			return e(t, n)
		}
		,
		r[t(44)] = function (e, t, n) {
			return e(t, n)
		}
		,
		r[t(30)] = function (e, t, n) {
			return e(t, n)
		}
		,
		r[t(143)] = function (e, t) {
			return e | t
		}
		,
		r[t(101)] = function (e, t) {
			return e & t
		}
		,
		r[t(122)] = function (e, t, n, r, i, o, a) {
			return e(t, n, r, i, o, a)
		}
		,
		r.ZpUiH = function (e, t) {
			return e & t
		}
		,
		r[t(72)] = function (e, t) {
			return e ^ t
		}
		,
		r[t(130)] = function (e, t) {
			return e ^ t
		}
		,
		r[t(41)] = function (e, t) {
			return e | t
		}
		,
		r[t(116)] = function (e, t) {
			return e > t
		}
		,
		r[t(80)] = function (e, t) {
			return e(t)
		}
		,
		r[t(33)] = function (e, t, n) {
			return e(t, n)
		}
		,
		r[t(83)] = function (e, t) {
			return e(t)
		}
		,
		r[t(60)] = function (e, t) {
			return e + t
		}
		,
		r.FDfcp = function (e, t) {
			return e * t
		}
		,
		r[t(95)] = function (e, t) {
			return e + t
		}
		,
		r[t(51)] = function (e, t) {
			return e & t
		}
		,
		r.DdHPB = function (e, t) {
			return e >> t
		}
		,
		r.abYok = function (e, t) {
			return e | t
		}
		,
		r[t(84)] = function (e, t) {
			return e << t
		}
		,
		r[t(105)] = function (e, t) {
			return e & t
		}
		,
		r[t(8)] = function (e, t) {
			return e - t
		}
		,
		r[t(137)] = function (e) {
			return e()
		}
		,
		r.YVBwM = function (e, t) {
			return e << t
		}
		,
		r[t(27)] = function (e, t) {
			return e & t
		}
		,
		r[t(26)] = function (e, t) {
			return e / t
		}
		,
		r[t(74)] = function (e, t) {
			return e * t
		}
		,
		r[t(49)] = t(14) + "abcdef",
		r[t(36)] = function (e, t) {
			return e >> t
		}
		,
		r[t(46)] = function (e, t) {
			return e + t
		}
		,
		r[t(75)] = function (e, t) {
			return e >> t
		}
		,
		r[t(47)] = function (e, t) {
			return e * t
		}
		,
		r[t(11)] = t(126) + t(128) + "UVWXYZabcdefghijklmn" + t(21) + "yz01234567" + t(139),
		r[t(63)] = function (e, t) {
			return e * t
		}
	,
	r.KIXRL = function (e, t) {
		return e << t
	}
	,
	r[t(57)] = function (e, t) {
		return e % t
	}
	,
	r[t(77)] = function (e, t) {
		return e << t
	}
	,
	r[t(71)] = function (e, t) {
		return e >> t
	}
	,
	r.jZUAt = function (e, t) {
		return e >> t
	}
	,
	r[t(48)] = function (e, t) {
		return e + t
	}
	,
	r[t(17)] = function (e, t) {
		return e % t
	}
	,
	r[t(85)] = function (e, t) {
		return e * t
	}
	,
	r[t(61)] = function (e, t) {
		return e < t
	}
	,
	r.mfuQZ = function (e, t) {
		return e + t
	}
	,
	r[t(125)] = function (e, t) {
		return e * t
	}
	,
	r[t(0)] = function (e, t) {
		return e(t)
	}
	;
	var i = r;

	function o(e, n) {
		for (var r = t, o = i.WNzfT[r(131)]("|"), a = 0; ;) {
			switch (o[a++]) {
				case "0":
					for (var d = 0; i.iXQwu(d, e.length); d += 16)
						for (var p = i[r(2)][r(131)]("|"), h = 0; ;) {
							switch (p[h++]) {
								case "0":
									w = i[r(53)](l, w, b, x, T, e[d + 2], 9, -51403784);
									continue;
								case "1":
									x = u(x, T, w, b, e[d + 6], 23, 76029189);
									continue;
								case "2":
									b = i[r(53)](u, b, x, T, w, e[i.JFqRJ(d, 9)], 4, -640364487);
									continue;
								case "3":
									T = i[r(141)](c, T, w, b, x, e[d + 10], 15, -1051523);
									continue;
								case "4":
									T = s(T, w, b, x, e[i.JFqRJ(d, 2)], 17, 606105819);
									continue;
								case "5":
									w = i[r(91)](c, w, b, x, T, e[i[r(65)](d, 3)], 10, -1894446606);
									continue;
								case "6":
									w = i.XfWkD(l, w, b, x, T, e[i.wKeAM(d, 14)], 9, -1019803690);
									continue;
								case "7":
									T = i.pviAr(f, T, v);
									continue;
								case "8":
									b = i.XfWkD(l, b, x, T, w, e[i[r(92)](d, 13)], 5, -1444681467);
									continue;
								case "9":
									x = i[r(38)](s, x, T, w, b, e[i[r(82)](d, 3)], 22, -1044525330);
									continue;
								case "10":
									w = s(w, b, x, T, e[i[r(82)](d, 5)], 12, 1200080426);
									continue;
								case "11":
									x = i[r(38)](l, x, T, w, b, e[i[r(82)](d, 0)], 20, -373897302);
									continue;
								case "12":
									w = i[r(38)](s, w, b, x, T, e[i[r(82)](d, 9)], 12, -1958435417);
									continue;
								case "13":
									b = i.XfWkD(s, b, x, T, w, e[i.xcQTI(d, 8)], 7, 1770035416);
									continue;
								case "14":
									var m = b;
									continue;
								case "15":
									w = i[r(38)](u, w, b, x, T, e[i.xcQTI(d, 8)], 11, -2022574463);
									continue;
								case "16":
									b = f(b, m);
									continue;
								case "17":
									w = i[r(111)](f, w, g);
									continue;
								case "18":
									x = l(x, T, w, b, e[i[r(78)](d, 12)], 20, -1921207734);
									continue;
								case "19":
									w = i[r(40)](u, w, b, x, T, e[d + 4], 11, 1272893353);
									continue;
								case "20":
									T = i[r(20)](u, T, w, b, x, e[i.PlAEw(d, 11)], 16, 1839030562);
									continue;
								case "21":
									b = s(b, x, T, w, e[i[r(123)](d, 12)], 7, 1804550682);
									continue;
								case "22":
									x = u(x, T, w, b, e[i[r(123)](d, 10)], 23, -1094730640);
									continue;
								case "23":
									T = i[r(67)](c, T, w, b, x, e[d + 14], 15, -1416354905);
									continue;
								case "24":
									b = s(b, x, T, w, e[i[r(123)](d, 4)], 7, -176418897);
									continue;
								case "25":
									w = i.UXeVn(u, w, b, x, T, e[d + 0], 11, -358537222);
									continue;
								case "26":
									b = i.UXeVn(l, b, x, T, w, e[i[r(62)](d, 1)], 5, -165796510);
									continue;
								case "27":
									b = i.UXeVn(u, b, x, T, w, e[i[r(62)](d, 13)], 4, 681279174);
									continue;
								case "28":
									b = i[r(12)](l, b, x, T, w, e[i[r(138)](d, 9)], 5, 568446438);
									continue;
								case "29":
									w = i.yMPhx(c, w, b, x, T, e[d + 7], 10, 11261161415);
									continue;
								case "30":
									var g = w;
									continue;
								case "31":
									b = c(b, x, T, w, e[i.yGmJD(d, 8)], 6, 1873313359);
									continue;
								case "32":
									x = i.aFxRD(f, x, y);
									continue;
								case "33":
									T = i[r(12)](l, T, w, b, x, e[i[r(121)](d, 15)], 14, -660478335);
									continue;
								case "34":
									T = i.kHuTw(u, T, w, b, x, e[d + 3], 16, -722881979);
									continue;
								case "35":
									b = i[r(50)](l, b, x, T, w, e[i[r(121)](d, 5)], 5, -701520691);
									continue;
								case "36":
									T = l(T, w, b, x, e[i[r(121)](d, 3)], 14, -187363961);
									continue;
								case "37":
									T = i[r(142)](u, T, w, b, x, e[i.QgSUn(d, 7)], 16, -155497632);
									continue;
								case "38":
									b = i.FcXlo(u, b, x, T, w, e[i.koePJ(d, 5)], 4, -378558);
									continue;
								case "39":
									w = i[r(142)](u, w, b, x, T, e[i[r(90)](d, 12)], 11, -421815835);
									continue;
								case "40":
									T = i[r(59)](u, T, w, b, x, e[i[r(28)](d, 15)], 16, 530742520);
									continue;
								case "41":
									x = i.wvVCN(s, x, T, w, b, e[d + 15], 22, 1236531029);
									continue;
								case "42":
									x = i[r(59)](l, x, T, w, b, e[i[r(119)](d, 4)], 20, -405537848);
									continue;
								case "43":
									b = i[r(59)](s, b, x, T, w, e[i.lvwPz(d, 0)], 7, -680976936);
									continue;
								case "44":
									b = i[r(59)](u, b, x, T, w, e[i[r(45)](d, 1)], 4, -1530992060);
									continue;
								case "45":
									x = i.nCrbn(u, x, T, w, b, e[i[r(129)](d, 14)], 23, -35311556);
									continue;
								case "46":
									b = c(b, x, T, w, e[i[r(42)](d, 12)], 6, 1700485571);
									continue;
								case "47":
									x = i[r(7)](u, x, T, w, b, e[i.kaQlD(d, 2)], 23, -995338651);
									continue;
								case "48":
									T = c(T, w, b, x, e[d + 6], 15, -1560198380);
									continue;
								case "49":
									w = i[r(145)](l, w, b, x, T, e[i[r(107)](d, 6)], 9, -1069501632);
									continue;
								case "50":
									x = i[r(134)](c, x, T, w, b, e[i[r(89)](d, 1)], 21, -2054922799);
									continue;
								case "51":
									x = i.fmdcS(l, x, T, w, b, e[d + 8], 20, 1163531501);
									continue;
								case "52":
									x = i[r(15)](c, x, T, w, b, e[i[r(9)](d, 13)], 21, 1309151649);
									continue;
								case "53":
									x = i[r(15)](s, x, T, w, b, e[i[r(56)](d, 11)], 22, -1990404162);
									continue;
								case "54":
									w = i[r(6)](s, w, b, x, T, e[i[r(32)](d, 13)], 12, -40341101);
									continue;
								case "55":
									x = i.sFtiw(s, x, T, w, b, e[i.UAFHv(d, 7)], 22, -45705983);
									continue;
								case "56":
									T = i.sFtiw(s, T, w, b, x, e[i.MFmWH(d, 6)], 17, -1473231341);
									continue;
								case "57":
									w = i[r(99)](s, w, b, x, T, e[i.MFmWH(d, 1)], 12, -389564586);
									continue;
								case "58":
									x = c(x, T, w, b, e[i[r(39)](d, 9)], 21, -343485551);
									continue;
								case "59":
									b = i[r(113)](c, b, x, T, w, e[i[r(39)](d, 4)], 6, -145523070);
									continue;
								case "60":
									T = i.bRLIN(s, T, w, b, x, e[i[r(39)](d, 10)], 17, -42063);
									continue;
								case "61":
									var v = T;
									continue;
								case "62":
									b = i[r(66)](c, b, x, T, w, e[d + 0], 6, -198630844);
									continue;
								case "63":
									w = i[r(66)](c, w, b, x, T, e[i[r(13)](d, 15)], 10, -30611744);
									continue;
								case "64":
									x = c(x, T, w, b, e[d + 5], 21, -57434055);
									continue;
								case "65":
									T = i[r(29)](l, T, w, b, x, e[i[r(13)](d, 7)], 14, 1735328473);
									continue;
								case "66":
									w = i[r(29)](c, w, b, x, T, e[i[r(79)](d, 11)], 10, -1120210379);
									continue;
								case "67":
									var y = x;
									continue;
								case "68":
									w = i[r(1)](l, w, b, x, T, e[d + 10], 9, 38016083);
									continue;
								case "69":
									T = i[r(1)](s, T, w, b, x, e[i[r(79)](d, 14)], 17, -1502002290);
									continue;
								case "70":
									T = i.SUrST(c, T, w, b, x, e[i[r(79)](d, 2)], 15, 718787259);
									continue;
								case "71":
									T = l(T, w, b, x, e[i[r(81)](d, 11)], 14, 643717713);
									continue
							}
							break
						}
					continue;
				case "1":
					var b = 1732584193;
					continue;
				case "2":
					return Array(b, x, T, w);
				case "3":
					e[i.MXnIN(n, 5)] |= i[r(23)](128, i[r(54)](n, 32));
					continue;
				case "4":
					var x = -271733879;
					continue;
				case "5":
					var w = 271733878;
					continue;
				case "6":
					e[i.BQgZQ(i[r(115)](n + 64, 9), 4) + 14] = n;
					continue;
				case "7":
					var T = -1732584194;
					continue
			}
			break
		}
	}

	function a(e, n, r, o, a, s) {
		var l = t;
		return f(i.BtzmV(d, i[l(44)](f, i.dbmfK(f, n, e), i[l(30)](f, o, s)), a), r)
	}

	function s(e, n, r, o, s, l, u) {
		var c = t;
		return a(i[c(143)](i[c(101)](n, r), i[c(101)](~n, o)), e, n, s, l, u)
	}

	function l(e, n, r, o, s, l, u) {
		var c = t;
		return i[c(122)](a, i[c(143)](i.ZpUiH(n, o), i.ZpUiH(r, ~o)), e, n, s, l, u)
	}

	function u(e, n, r, o, s, l, u) {
		return i[t(122)](a, i.tsNzQ(n ^ r, o), e, n, s, l, u)
	}

	function c(e, n, r, o, s, l, u) {
		var c = t;
		return i[c(122)](a, i[c(130)](r, i[c(41)](n, ~o)), e, n, s, l, u)
	}

	function f(e, n) {
		var r = t
			, o = i[r(95)](65535 & e, i.iqfMz(n, 65535))
			, a = i[r(95)](e >> 16, i[r(97)](n, 16)) + i[r(97)](o, 16);
		return i[r(103)](i[r(84)](a, 16), i[r(105)](o, 65535))
	}

	function d(e, n) {
		var r = t;
		return i.abYok(e << n, e >>> i[r(8)](32, n))
	}

	function p(e) {
		for (var n = t, r = i[n(137)](Array), o = i[n(8)](i.vRqUp(1, 16), 1), a = 0; a < i.FDfcp(e[n(108)], 16); a += 16)
			r[i[n(97)](a, 5)] |= i[n(102)](i[n(27)](e[n(127)](i[n(26)](a, 16)), o), i[n(54)](a, 32));
		return r
	}

	function h(e) {
		for (var n = t, r = i[n(49)], o = "", a = 0; i.iXQwu(a, i[n(74)](e[n(108)], 4)); a++)
			o += i.xgzfr(r[n(64)](15 & i[n(36)](e[i[n(36)](a, 2)], i[n(46)](i[n(74)](a % 4, 8), 4))), r[n(64)](15 & i.wWwRM(e[a >> 2], i[n(47)](a % 4, 8))));
		return o
	}

	return i[t(0)]((function (e) {
			var n = t;
			return i[n(144)](h, i[n(76)](o, i.vyNVU(p, e), 16 * e[n(108)]))
		}
	), e)
}

function btoa_change(e) {
	var t = u
		, r = {};
	// console.log(t(244));
	r.TGmSp = t(244) + "ARACTER_ERR",
		r[t(238)] = t(224) + t(250) + "/",
		r[t(205)] = "^([^ ]+( +" + t(230) + t(259),
		r.aYkvo = function (e) {
			return e()
		}
		,
		r[t(254)] = function (e, t) {
			return e % t
		}
		,
		r.evetF = function (e, t) {
			return e >> t
		}
		,
		r.GfTek = t(196),
		r[t(260)] = function (e, t) {
			return e << t
		}
		,
		r[t(229)] = function (e, t) {
			return e | t
		}
		,
		r[t(242)] = function (e, t) {
			return e << t
		}
		,
		r[t(228)] = function (e, t) {
			return e & t
		}
		,
		r[t(207)] = function (e, t) {
			return e << t
		}
		,
		r[t(202)] = function (e, t) {
			return e & t
		}
		,
		r.jdwcO = function (e, t) {
			return e === t
		}
		,
		r.kPdGe = t(231),
		r[t(195)] = t(213),
		r[t(201)] = function (e, t) {
			return e & t
		}
		,
		r[t(206)] = function (e, t) {
			return e == t
		}
		,
		r[t(219)] = function (e, t) {
			return e + t
		}
		,
		r[t(220)] = function (e, t) {
			return e(t)
		}
	;
	var i = r;
	var f = "U9876543210zyxwvutsrqpomnlkjihgfdecbaZXYWVUTSRQPONABHICESQWK2Fi+9876543210zyxwvutsrqpomnlkjihgfdecbaZXYWVUTSRQPONABHICESQWK2Fi";
	// console.log(i);
	if (/([^\u0000-\u00ff])/.test(e))
		throw new Error(i.TGmSp);
	for (var o, a, s, l = 0, c = []; l < e[t(261)];) {
		switch (a = e[t(237)](l),
			s = i.kukBH(l, 6)) {
			case 0:
				// console.log(f[t(245)]);
				delete window,
					delete document,
					c[t(246)](f[t(245)](i[t(212)](a, 2)));
				break;
			case 1:
				try {
					console.log(n.g);
					"WhHMm" === i[t(198)] || n.g && c[t(246)](f[t(245)](i.pHtmC(2 & o, 3) | i.evetF(a, 4)))
				} catch (e) {
					c[t(246)](f[t(245)](i[t(229)](i.cVCcp(3 & o, 4), a >> 4)))
				}
				break;
			case 2:
				c[t(246)](f[t(245)](i[t(229)](i[t(242)](15 & o, 2), i.evetF(a, 6)))),
					c[t(246)](f[t(245)](i[t(228)](a, 63)));
				break;
			case 3:
				c[t(246)](f[t(245)](i[t(212)](a, 3)));
				break;
			case 4:
				c.push(f[t(245)](i[t(229)](i[t(207)](i.OWUOc(o, 4), 6), i[t(212)](a, 6))));
				break;
			case 5:
				c[t(246)](f[t(245)](i[t(229)](i[t(207)](i[t(202)](o, 15), 4), a >> 8))),
					c.push(f.charAt(i[t(202)](a, 63)))
		}
		o = a,
			l++
	}
	return 0 == s ? i[t(226)](i[t(241)], i[t(195)]) || (c[t(246)](f[t(245)](i[t(201)](o, 3) << 4)),
		c.push("FM")) : i.eMnqD(s, 1) && (c[t(246)](f[t(245)]((15 & o) << 2)),
		c[t(246)]("K")),
		i[t(219)](i.aQCDK(d(15), md5(c[t(234)](""))), i[t(220)](d, 10))
}

function btoa(){
	let p_s = Date["parse"](new Date)["toString"]();
	return [p_s, btoa_change(p_s)];
}

// btoa();
// let p_s = Date["parse"](new Date)["toString"]();
// // console.log(p_s);
// let m = btoa_change(1730510924000);
// console.log(m);

test.py

import requests
import execjs


file = open("test.js", 'r')
exec_js = file.read()
exec_code = execjs.compile(exec_js)
res = exec_code.call("btoa")

url = "https://match.yuanrenxue.cn/api/match/16?page=1&m={}&t={}".format(res[1], res[0])
headers = {
	'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36',
}
cookies = {
	"sessionid": "xxxxx",
}
resp = requests.get(url, headers=headers, cookies=cookies)
print(resp.text)

執行，卻提示我們不期待的token或者是驗證錯誤。

嘗試了多次，發現還是報這個問題。經過多次debug，終於發現了問題。
頁面中的n.g是有值的，不會進入catch語句。

而程式碼中n.g是未定義的，導致我們的程式碼會進入catch語句報錯

所以我們這裡直接將n.g改為true即可，再次執行就可獲得頁面上的數字了。

編寫完整程式碼獲取所有頁面數字之和。
test.py

import requests
import execjs
import re

pattern = '{"value": (.*?)}'
res_sum = 0

for i in range(1, 6):
	file = open("test.js", 'r')
	exec_js = file.read()
	exec_code = execjs.compile(exec_js)
	res = exec_code.call("btoa")

	url = "https://match.yuanrenxue.cn/api/match/16?page={}&m={}&t={}".format(i, res[1], res[0])
	headers = {
		'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36', }
	cookies = {"sessionid": "xxxxx", }
	resp = requests.get(url, headers=headers, cookies=cookies)
	string = resp.text
	findall = re.findall(pattern, string)
	for item in findall:
		res_sum += int(item)
print(res_sum)

執行得到結果。

提交結果，成功透過。

猿人學web端爬蟲攻防大賽賽題第6題——js 混淆 - 回溯
2024-11-16
Web爬蟲JS
猿人學web端爬蟲攻防大賽賽題第1題——js 混淆 - 原始碼亂碼
2024-10-31
Web爬蟲JS原始碼
猿人學web端爬蟲攻防大賽賽題第20題——2022新春快樂
2024-11-17
Web爬蟲
猿人學web端爬蟲攻防大賽賽題第17題——天殺的http2.0
2024-10-30
Web爬蟲HTTP
猿人學web端爬蟲攻防大賽賽題第19題——烏拉烏拉烏拉
2024-11-02
Web爬蟲
猿人學web端爬蟲攻防大賽賽題第15題——備周則意怠-常見則不疑
2024-11-01
Web爬蟲
猿人學爬蟲攻防賽總結
2018-10-26
爬蟲
Js逆向之猿人學比賽第一題
2020-12-03
JS
獎金三萬，猿人學爬蟲對抗大賽來啦
2018-10-13
爬蟲
XCTF攻防世界--（新手賽區）第3題快來圍觀學習！
2022-05-26
XCTF攻防世界--（新手賽區）第4題快來圍觀學習！
2022-05-26
XCTF攻防世界--（新手賽區）第2題快來圍觀學習！
2022-05-20
python爬蟲js逆向學習（二）
2020-07-03
Python爬蟲JS
python爬蟲js逆向
2019-09-22
Python爬蟲JS
python爬蟲之JS逆向
2022-06-11
Python爬蟲JS
python爬蟲之js逆向（三）
2020-01-06
Python爬蟲JS
python爬蟲之js逆向（二）
2019-11-05
Python爬蟲JS
2024廣東大學生攻防大賽WP
2024-05-13
2022廣東大學生攻防大賽WP
2024-05-13
CSDN周賽第35期：贏《阿里雲天池大賽賽題解析―深度學習篇》和定製周邊
2023-03-07
阿里深度學習
2024哈佛-麻省數學競賽（HMMT）2月錦標賽團體賽第9題
2024-03-08
HMM
Python爬蟲之JS逆向分析技巧
2020-04-17
Python爬蟲JS
[補題] 第 45 屆國際大學生程式設計競賽（ICPC）亞洲區域賽（上海）
2020-12-19
程式設計
第15屆浙江省大學生程式設計競賽D題
2020-10-01
程式設計
逆向爬蟲知識學習
2022-03-21
爬蟲
[leetcode 第 400 場周賽]題解
2024-06-02
LeetCode
猿人學內部練習平臺第54~60題
2024-06-07
【CSDN競賽第27期】贏圖書《阿里雲天池大賽賽題解析—機器學習篇》和定製周邊
2023-02-02
阿里機器學習
2020“數維杯”國際大學生數學建模競賽賽題分析
2020-12-01
python爬蟲簡單實現逆向JS解密
2019-08-29
Python爬蟲JS解密
Python爬蟲進階之JS逆向入門
2019-05-29
Python爬蟲JS
湖南大學2020屆ACM新生賽部分題解
2021-01-03
ACM
把猿人學爬蟲課的著作權登記成功了
2020-07-08
爬蟲
猿人學內部第三題
2024-06-27
python爬蟲之JS逆向某易雲音樂
2022-06-11
Python爬蟲JS
第 178 場力扣周賽第二題
2020-03-01
力扣
Leetcode 第136場周賽解題報告
2019-05-14
LeetCode
素養賽Python複賽題——錯排問題
2024-06-16
Python

猿人學web端爬蟲攻防大賽賽題第16題——js逆向 - window蜜罐

解題步驟

相關文章