$ cat writeup.md…
$ cat writeup.md…
spbctf
Task: not-stripped x86-64 C crackme that reads a string and prints Correct! when 31 characters match a per-index check(i). Solution: recover a 5-entry function-pointer table and four movabs data constants from the disassembly, reimplement the byte transforms and the bit-driven check() in Python, and emit check(0..30) as the flag.
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