Mr.X47's BiLoop Cipher

Author:
Mr.X47

Language:
C/C++

Upload:
2026-07-04 10:44

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Platform:
Unix/linux etc.

Difficulty:
1.8

Quality:
4.0

Arch:
x86-64

Downloads:
397

Size:
14.20 KB

Writeups:
3

Comments:
5

Description

Write a keygen to generate the correct password for any username.

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Comments (5)
Writeups (3)

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Sanemy on 2026-07-06 20:11: biloop_cipher ) ./BiLoop_Cipher Username: admin123 Password: xdtgj1#3 Access Status: Success biloop_cipher ) good,thank you so much!

lister on 2026-07-08 00:18: thanks for the crackme , it was fun to solve and i learned many things .

magnus0708 on 2026-07-08 16:53: data=bytearray.fromhex("16 1d 19 1d 04 18 00 07 1c 18 08 1b 03 1c 07 19 1c 14 01 20 06 11 1a 0c 10 11 0a 11 0e 14 18 0f") username = bytearray.fromhex("30 30 30 30 30 30 30 30") for i in range(0, len(username) ,2): username[i % 8]^=data[i] for j in range(0, len(username) , 3): username[j % 8]^=data[31-j] for k in range(len(username)): if(username[k] < 33 or username[k]==127): username[k]=42 print(username.decode()) enter username as 00000000 password = )0)>40!0 just recreated the internal logic

dgjvbgfyrdgfydjgv on 2026-07-11 06:50: [Click to reveal]

SirWardrake on 2026-07-12 23:27: Just some XOR-magic. Good for beginners

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Solution by yonliud on 2026-07-06 13:26:
entry file is at doc/writeup.md. keygen at src/keygen.c

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Solution by xnine on 2026-07-09 12:25:
WriteUp X_9

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Solution by bmarius05 on 2026-07-10 09:27:
Writing a keygen program in C

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crackmes.one

crackmes.one

Mr.X47's BiLoop Cipher