100

FIESTA

n00b17CTF crypto

Shishir just bought a new Ford Fiesta but naughty n00b just locked his door and challenged him to unlock it.
n00b gave shishir the following 2 files:

ciphertext: http://hack.bckdr.in/FIESTA/ciphertext
fiesta.py: http://hack.bckdr.in/FIESTA/fiesta.py

Hint: Fiestel Cipher

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