XORient Yourself

encodehexencrypted

1020222c733a203a6c393d3769362d2520353121356907160c1b0a796f06213a306f263f782e722a3b222323293628376937263c262b362a3669272c6f28292c6f2b262663203d253d21262c3763382638306f3a26246317001e78383d3b3830614546102a202c74306f36232d3d722f3f2228756c0c1a111d153817001e077e761605701d16130a6b610f060f101b7c070c001003177f32

encrypt.py

#!/usr/bin/env python2

def xor(msg, key):
    o = ''
    for i in range(len(msg)):
        o += chr(ord(msg[i]) ^ ord(key[i % len(key)]))
    return o

with open('message', 'r') as f:
    msg = ''.join(f.readlines()).rstrip('\n')

with open('key', 'r') as k:
    key = ''.join(k.readlines()).rstrip('\n')

assert key.isalnum() and (len(key) == 9)
assert 'TUCTF' in msg

#NOTE: I am sharing the hex digest not the raw as indicated here

with open('encrypted', 'w') as fo:
    fo.write(xor(msg, key))