Crypto CTFs Tricks

Reading time: 7 minutes

在线哈希数据库

• 谷歌一下
• http://hashtoolkit.com/reverse-hash?hash=4d186321c1a7f0f354b297e8914ab240
• https://www.onlinehashcrack.com/
• https://crackstation.net/
• https://md5decrypt.net/
• https://www.onlinehashcrack.com
• https://gpuhash.me/
• https://hashes.org/search.php
• https://www.cmd5.org/
• https://hashkiller.co.uk/Cracker/MD5
• https://www.md5online.org/md5-decrypt.html

魔法自动解码器

• https://github.com/Ciphey/Ciphey
• https://gchq.github.io/CyberChef/ (魔法模块)
• https://github.com/dhondta/python-codext
• https://www.boxentriq.com/code-breaking

编码器

大多数编码数据可以通过这两个资源解码：

• https://www.dcode.fr/tools-list
• https://gchq.github.io/CyberChef/

替换自动解码器

• https://www.boxentriq.com/code-breaking/cryptogram
• https://quipqiup.com/ - 非常好！

凯撒 - ROTx 自动解码器

• https://www.nayuki.io/page/automatic-caesar-cipher-breaker-javascript

Atbash 密码

• http://rumkin.com/tools/cipher/atbash.php

基础编码自动解码器

使用以下链接检查所有这些基础：https://github.com/dhondta/python-codext

• Ascii85
• BQ%]q@psCd@rH0l
• Base26 [A-Z]
• BQEKGAHRJKHQMVZGKUXNT
• Base32 [A-Z2-7=]
• NBXWYYLDMFZGCY3PNRQQ====
• Zbase32 [ybndrfg8ejkmcpqxot1uwisza345h769]
• pbzsaamdcf3gna5xptoo====
• Base32 Geohash [0-9b-hjkmnp-z]
• e1rqssc3d5t62svgejhh====
• Base32 Crockford [0-9A-HJKMNP-TV-Z]
• D1QPRRB3C5S62RVFDHGG====
• Base32 Extended Hexadecimal [0-9A-V]
• D1NMOOB3C5P62ORFDHGG====
• Base45 [0-9A-Z $%*+-./:]
• 59DPVDGPCVKEUPCPVD
• Base58 (bitcoin) [1-9A-HJ-NP-Za-km-z]
• 2yJiRg5BF9gmsU6AC
• Base58 (flickr) [1-9a-km-zA-HJ-NP-Z]
• 2YiHqF5bf9FLSt6ac
• Base58 (ripple) [rpshnaf39wBUDNEGHJKLM4PQ-T7V-Z2b-eCg65jkm8oFqi1tuvAxyz]
• pyJ5RgnBE9gm17awU
• Base62 [0-9A-Za-z]
• g2AextRZpBKRBzQ9
• Base64 [A-Za-z0-9+/=]
• aG9sYWNhcmFjb2xh
• Base67 [A-Za-z0-9-.!~_]
• NI9JKX0cSUdqhr!p
• Base85 (Ascii85) [!"#$%&'()*+,-./0-9:;<=>?@A-Z[\]^_`a-u]
• BQ%]q@psCd@rH0l
• Base85 (Adobe) [!"#$%&'()*+,-./0-9:;<=>?@A-Z[\]^_`a-u]
• <~BQ%]q@psCd@rH0l~>
• Base85 (IPv6 or RFC1924) [0-9A-Za-z!#$%&()*+-;<=>?@^`{|}~_]
• Xm4yV_|Y(V{dF>`
• Base85 (xbtoa) [!"#$%&'()*+,-./0-9:;<=>?@A-Z[\]^_`a-u]
• xbtoa Begin\nBQ%]q@psCd@rH0l\nxbtoa End N 12 c E 1a S 4e6 R 6991d
• Base85 (XML) [_0-9A-Za-y!#$()*+,-./:;=?@^`{|}~z__]
• Xm4y|V{~Y+V}dF?
• Base91 [A-Za-z0-9!#$%&()*+,./:;<=>?@[]^_`{|}~"]
• frDg[*jNN!7&BQM
• Base100 []
• 👟👦👣👘👚👘👩👘👚👦👣👘
• Base122 []
• 4F ˂r0Xmvc
• ATOM-128 [/128GhIoPQROSTeUbADfgHijKLM+n0pFWXY456xyzB7=39VaqrstJklmNuZvwcdEC]
• MIc3KiXa+Ihz+lrXMIc3KbCC
• HAZZ15 [HNO4klm6ij9n+J2hyf0gzA8uvwDEq3X1Q7ZKeFrWcVTts/MRGYbdxSo=ILaUpPBC5]
• DmPsv8J7qrlKEoY7
• MEGAN35 [3G-Ub=c-pW-Z/12+406-9Vaq-zA-F5]
• kLD8iwKsigSalLJ5
• ZONG22 [ZKj9n+yf0wDVX1s/5YbdxSo=ILaUpPBCHg8uvNO4klm6iJGhQ7eFrWczAMEq3RTt2]
• ayRiIo1gpO+uUc7g
• ESAB46 []
• 3sHcL2NR8WrT7mhR
• MEGAN45 []
• kLD8igSXm2KZlwrX
• TIGO3FX []
• 7AP9mIzdmltYmIP9mWXX
• TRIPO5 []
• UE9vSbnBW6psVzxB
• FERON74 []
• PbGkNudxCzaKBm0x
• GILA7 []
• D+nkv8C1qIKMErY1
• Citrix CTX1 []
• MNGIKCAHMOGLKPAKMMGJKNAINPHKLOBLNNHILCBHNOHLLPBK

http://k4.cba.pl/dw/crypo/tools/eng_atom128c.html - 404 死链接: https://web.archive.org/web/20190228181208/http://k4.cba.pl/dw/crypo/tools/eng_hackerize.html

HackerizeXS [╫Λ↻├☰┏]

╫☐↑Λ↻Λ┏Λ↻☐↑Λ

• http://k4.cba.pl/dw/crypo/tools/eng_hackerize.html - 404 死链接: https://web.archive.org/web/20190228181208/http://k4.cba.pl/dw/crypo/tools/eng_hackerize.html

摩尔斯

.... --- .-.. -.-. .- .-. .- -.-. --- .-.. .-

• http://k4.cba.pl/dw/crypo/tools/eng_morse-encode.html - 404 死链接: https://gchq.github.io/CyberChef/

UUencoder

begin 644 webutils_pl
M2$],04A/3$%(3TQ!2$],04A/3$%(3TQ!2$],04A/3$%(3TQ!2$],04A/3$%(
M3TQ!2$],04A/3$%(3TQ!2$],04A/3$%(3TQ!2$],04A/3$%(3TQ!2$],04A/
F3$%(3TQ!2$],04A/3$%(3TQ!2$],04A/3$%(3TQ!2$],04A/3$$`
`
end

• http://www.webutils.pl/index.php?idx=uu

XXEncoder

begin 644 webutils_pl
hG2xAEIVDH236Hol-G2xAEIVDH236Hol-G2xAEIVDH236Hol-G2xAEIVDH236
5Hol-G2xAEE++
end

• www.webutils.pl/index.php?idx=xx

YEncoder

=ybegin line=128 size=28 name=webutils_pl
ryvkryvkryvkryvkryvkryvkryvk
=yend size=28 crc32=35834c86

• http://www.webutils.pl/index.php?idx=yenc

BinHex

(This file must be converted with BinHex 4.0)
:#hGPBR9dD@acAh"X!$mr2cmr2cmr!!!!!!!8!!!!!-ka5%p-38K26%&)6da"5%p
-38K26%'d9J!!:

• http://www.webutils.pl/index.php?idx=binhex

ASCII85

<~85DoF85DoF85DoF85DoF85DoF85DoF~>

• http://www.webutils.pl/index.php?idx=ascii85

Dvorak 键盘

drnajapajrna

• https://www.geocachingtoolbox.com/index.php?lang=en&page=dvorakKeyboard

A1Z26

字母对应其数字值

8 15 12 1 3 1 18 1 3 15 12 1

仿射密码编码

字母到数字 (ax+b)%26 (a 和 b 是密钥，x 是字母) 并将结果转换回字母

krodfdudfrod

SMS 代码

Multitap 通过重复的数字 替换一个字母，这些数字由手机 键盘 上对应的键码定义（此模式在编写 SMS 时使用）。
例如：2=A, 22=B, 222=C, 3=D...
你可以通过看到** 多个数字重复** 来识别这个代码。

你可以在这里解码这个代码: https://www.dcode.fr/multitap-abc-cipher

培根代码

用 4 个 A 或 B（或 1 和 0）替代每个字母

00111 01101 01010 00000 00010 00000 10000 00000 00010 01101 01010 00000
AABBB ABBAB ABABA AAAAA AAABA AAAAA BAAAA AAAAA AAABA ABBAB ABABA AAAAA

符文

压缩

Raw Deflate 和 Raw Inflate（你可以在 Cyberchef 中找到这两者）可以在没有头部的情况下压缩和解压数据。

简易加密

XOR - 自动解密器

• https://wiremask.eu/tools/xor-cracker/

Bifid

需要一个关键字

fgaargaamnlunesuneoa

Vigenere

需要一个关键词

wodsyoidrods

• https://www.guballa.de/vigenere-solver
• https://www.dcode.fr/vigenere-cipher
• https://www.mygeocachingprofile.com/codebreaker.vigenerecipher.aspx

强加密

Fernet

2 个 base64 字符串（令牌和密钥）

Token:
gAAAAABWC9P7-9RsxTz_dwxh9-O2VUB7Ih8UCQL1_Zk4suxnkCvb26Ie4i8HSUJ4caHZuiNtjLl3qfmCv_fS3_VpjL7HxCz7_Q==

Key:
-s6eI5hyNh8liH7Gq0urPC-vzPgNnxauKvRO4g03oYI=

• https://asecuritysite.com/encryption/ferdecode

Samir 秘密共享

一个秘密被分成 X 部分，要恢复它需要 Y 部分 (Y <=X).

8019f8fa5879aa3e07858d08308dc1a8b45
80223035713295bddf0b0bd1b10a5340b89
803bc8cf294b3f83d88e86d9818792e80cd

http://christian.gen.co/secrets/

OpenSSL 暴力破解

• https://github.com/glv2/bruteforce-salted-openssl
• https://github.com/carlospolop/easy_BFopensslCTF

工具

• https://github.com/Ganapati/RsaCtfTool
• https://github.com/lockedbyte/cryptovenom
• https://github.com/nccgroup/featherduster