BUGKU CTF (Crypto第一篇)

简介: BUGKU CTF 练习平台

把猪困在猪圈里Crypto

下载txt文件

/9j/4AAQSkZJRgABAQEAYABgAAD/4RDaRXhpZgAATU0AKgAAAAgABAE7AAIAAAAFAAAISodpAAQAAAABAAAIUJydAAEAAAAKAAAQyOocAAcAAAgMAAAAPgAAAAAc6gAAAAgAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAFIwMFQAAAAFkAMAAgAAABQAABCekAQAAgAAABQAABCykpEAAgAAAAM0MQAAkpIAAgAAAAM0MQAA6hwABwAACAwAAAiSAAAAABzqAAAACAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA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data:image/png;base64,加上上面内容在浏览器中输入得到猪圈密码

http://www.metools.info/code/c90.html

你喜欢下棋吗

Crypto

描  述: 密码全为小写,格式bugku{}

棋盘解密

https://www.qqxiuzi.cn/bianma/qipanmima.php

解压后的到flag.txt

博多码解码网址https://www.boxentriq.com/code-breaking/baudot-code

BAUD0TC0DE复制到kali看一下是0还是o

bugku{baud0tc0de}

小山丘的秘密

Crypto

描  述: hill能有什么秘密呢

希尔密码是运用基本矩阵论原理的替换密码,由Lester S. Hill在1929年发明。

每个字母当作26进制数字:A=0, B=1, C=2… 一串字母当成n维向量,跟一个n×n的矩阵相乘,再将得出的结果模26。

故现在的字母表为Z=0 , A=1 , B=2 …

zabcdefghijklmnopqrstuvwxy

希尔密码还需要密钥,密钥肯定就在图片中,图片看上去4和9的位置看上去像是缺了棋子,那么将它看作0,那么此处位置为 z ,其他位置如图所示,得到密钥

得到abczadef

bugku{PLGTGBQHM}为小写

bugku{plgtgbqhm}

bugku{whatahill}

EN-气泡Crypto

描  述: bugku{}

http://www.hiencode.com/bubble.html 不能有空格 重复三次

你以为是md5吗

Crypto

提  示: md5的构成

描  述: flag{}

MD5算法对输入任意长度的消息进行运行,产生一个128位的消息摘要(32位的数字字母混合码)

所以 无论是二进制 还是十六进制 都不应该出现 i o u 删了后刚好 32位

bc177a7a9c7df69c248647b4dfc6fd84

flag{666666666666}

Math&English

Crypto

描  述: bugku{}

3×7=
11×3=
sin(Π/6)+sin(Π/6)=                  
2×11=
3×cos(2Π)=
22×2=
6×9=
2.5×2=
tan(Π) + 1 = 
5×7=
7×9-9=
ln(e) + 2 =
(6×6)-1=
4×10 + cos(0) =
26×2 =
ln(e) × 10 +3 =

将算出数字参照下图

easy_crypto

Crypto

描  述: 01

0010 0100 01 110 1111011 11 11111 010 000 0 001101 1010 111 100 0 001101 01111 000 001101 00 10 1 0 010 0 000 1 01111 10 11110 101011 1111101

http://www.hiencode.com/morse.html

flag%u7bm0rse_code_1s_interest1n9!%u7d

flag{m0rse_code_1s_interest1n9!}

黄道十二官

Crypto

描  述: flag{}

下载的图片利用网站识别字符

https://web.baimiaoapp.com/

RSSSSSA

题目作者: 树木有点绿

描  述: 这是一个非常简单的RSA

e= 29
n= [30327806559308143170251580709344293187241377730282921872781575442079759214585250363018838833645033147048274099882927502135822532658361986843089038971809699440265951177983452623836631182131316783838858410002798162604085127069663694047960859197275399255233610031615817404372364349637055800705223698180870067436988096453852212302215116141417320041306889953482862584091194471138823690888819261753453934793173621702326066309884946089600954181869152898879815596750534117681142535676578782280108274188679221706983417414010745084946761574988283779791817969892384961589321416872995532377690950727835973399647956491090102555409, 21201945432185822273274384690776217497058902883149769388717005633136179247488270702594230376181288768858812012728332675867062647184506694171059959523739358150427193785288862325490483145892589156285417654675409522395461778047750713685913892924628709666682898716590870448590373784915689173142592010032611604863227130433544024508077340982534157235155525782725897976772958969688875400789351919632303930452916408599309209320071861151825269791353531470198408880292345886431587538581009065968803858039954194364023302947597373427552936469472639511930960050054058074397349282354505376836608524919420271358644040625272611834141, 22066722902445052583751020956045490471001229482392491124491605354676847417172264621341464938604744547196288089839857467414993454346487337649230414610787992018112868327537703873968574017809192037003789320466268844177192403612544118218277599434212247848173311593650429895564484864389688450385022488374534161927558878171030816097844863947341831453646609936063871558801826304657779664413322335636640541461530342335752307248094073705764721946570652851209785138013258495645549732438232440380725327458972312411697319199017195198686877941387699409525165884596929130086232751883272627080260637468553554114550895128931332556731, 22201854184449819277142185267444382273897841368693102934683821764656962395743826157719287435432760269046740745554089225345079284556882054478011586504345324432037743900501514661174050074095054738909658615769021337525829263909874107830437595890817773992121956416657353703784722839247395770361048793369307710079965231303120658766595423843609770605074056488132086912631857454296414163240447182566834479775710868231123976843543989150070863055009604342636257860806777650229259057896505901924417615469387152636729167180379751548900559610148369495057752373605259839922528981148145028120068953655171238962097381144518051147647, 23083840233620992224264526611828536460163558999895002497626591923027006640369297896797243966752151170505775381864181314027021495993588967339108820520528972816379841269197877268187639445751437743759925034716110259215833511647315164717603384871571434294945499053929574035111488209616165563966647430661297795173473421242368063748311843339991310650516321423828411278303633083702771322000349673510635860126984256969661571754688788776209025080804889751723316765593984981235995307564443348633486717797511234178142487310778666548407208267425343907584339092352000989025888560813696453621147789642611872568202165905056714548393, 23218822553600624275851570918327600443202628196986792799225558073420180848161120578874626283971398879263850567245985782927539083923897342980706479709569579629418591343916765139087666874177802508777776627037319228004136490718510415593236575453393195566284309655647871922536044561206875353630359295663312099218766232095780724182736486077598036512073334536846225792741359530446751954255489310204542643379502811042809497521182466190499994814904710462792494798490083908932248164953870969612782940162469775904944210724177461134898671189252356405455733124848794067548040801451291259009951270923040763880342053172756399581161, 15537621716770448782502134748692657546482394987891814167799488723003580500457315182184780510271452262025473252065075152671351786862081823121704341999623090322622893909472600153140827895279392030437881151726836273881483138361166633444702898613389403354997826623821941237846412179222285546753657710048063757827302566538233983504273873252358216792306525072453406699162260561047287090285490165275142295462447156551127598082848917540871566229207376989948730655600666112133543582179171414297735210520886697976984424647098383547804465263579778326244367614695099540268893495474464880528394459062149362976029449912614166126761]
c= [60460941252276898700338705069178122763054360537964364
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