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picoCTF 2024 writeup endianness

Last updated at Posted at 2024-10-30

endianness (General Skills)

Know of little and big endian? Source nc titan.picoctf.net 56896

添付ファイル
・flag.c

とりあえず、nc titan.picoctf.net 56896を実行する。

$ nc titan.picoctf.net 56896
Welcome to the Endian CTF!
You need to find both the little endian and big endian representations of a word.
If you get both correct, you will receive the flag.
Word: sbppe
Enter the Little Endian representation: 6570706273
Correct Little Endian representation!
Enter the Big Endian representation: 7362707065
Correct Big Endian representation!
Congratulations! You found both endian representations correctly!
Your Flag is: picoCTF{3ndi4n_sw4p_su33ess_02999450}

wordsbppeをcberchefでTo Hexする。これを、little endianとbig endianに合わせて、並べ替える。
人間にとって、little endianは逆順となり、big endianは正順となる。
フラグが得られた。

picoCTF{3ndi4n_sw4p_su33ess_02999450}

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