reverseeasy

crackme4

spbctf

Task: Python crackme with source code, generate serial for name SPb_CTF_2017. Solution: Analyze check function that splits name into 3 blocks of 4 bytes and swaps first and third blocks via XOR swap, then implement keygen.

$ ls tags/ techniques/
pythonkeygensource_codexor_swapint_from_bytes
keygen_implementationxor_swap_analysis
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