egg's keygenme - complex validation

Author:
egg

Language:
C/C++

Upload:
2020-01-25 14:49

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Platform:
Unix/linux etc.

Difficulty:
3.0

Quality:
4.3

Arch:
x86-64

Downloads:
15

Size:
16.30 KB

Writeups:
3

Comments:
9

Description

Keygen me with no obfuscation or anything like that, but a fairly complex validation system.

Comments (9)
Writeups (3)

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SYS_V on 2020-01-26 22:29: ./keygenme: /lib/x86_64-linux-gnu/libm.so.6: version `GLIBC_2.29' not found (required by ./keygenme)

Carbon on 2020-02-04 18:39: Yes, same thing on my side. It expects a dynamic library: GLIBC 2.29. I'm installing GNU Libc6 to see how it fixes this issue.

Carbon on 2020-02-04 19:20: Ok I got it recompiled without the dependencies (that were not even needed). This command expects 2 parameters: Usage: ./keygenme has to be at least 4 characters long and needs to be 25 characters

Carbon on 2020-02-04 19:22: Wow... the \ were eaten by the site.

Carbon on 2020-02-04 19:30: Note for the site admins: it could be a good idea to sanitize user's inputs inputs.

ragnar_crackbeard87 on 2020-03-05 12:42: [Click to reveal]

BinaryNewbie on 2020-03-26 22:14: Nice crackme @egg. The choice of the serial charset impacts a lot in the keygen performance, btw, thank you.

Zopazz on 2020-06-24 07:56: Very fun crackme! Took me a while to get. I uploaded my solution

unc4nny on 2021-01-11 11:56: @ragnar_crackbeard, would you mind sharing your solution? Mine goes like this (I plan on sharing it on solutions tab): ./keygenme $(python -c "print('E' * 464)") $(python -c "print('\x60'+'E' * 24)")

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Solution by GhostLike on 2020-02-01 07:36:
Solution for keygenme challenge by LongChampion

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Solution by unc4nny on 2021-01-11 17:22:
The txt file contains the link to a step-by-step solution using second degree equation, on github.

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Solution by eveninglatte on 2024-03-10 23:24:
A cool crackmes with a bit of math sprinked in! Password to the .zip is "crackmes.one"

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