erfan's XBS

Author:
erfan

Language:
C/C++

Upload:
2020-05-16 15:06

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Platform:
Unix/linux etc.

Difficulty:
3.0

Quality:
4.0

Arch:
x86-64

Downloads:
212

Size:
16.58 KB

Writeups:
1

Comments:
2

Description

you should find the passkey, 5 positive integers less than 2**31 given space separated as input

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Writeups (1)

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erfan on 2020-06-09 04:58: Wow no one has solved it yet! As a hint, this code calculates xor basis, So write a similar code, compile it and compare it to this one to find out what else this one does https://codeforces.com/blog/entry/68953

jeffli6789 on 2020-06-12 11:31: An interesting algorithm! Its complex if only analyzed statically. But debugging helps me out. Thx!

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Solution by cronop.io on 2020-06-09 02:44:
Solved using radare2 and Z3: https://cronop-io.github.io/posts/binary%20analysis/2020-06-08-crackme-xbs/

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crackmes.one

crackmes.one

erfan's XBS