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BCTF 2016 steganography 150: midifan Writeup
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| from scryptos import * | |
| d = open("out.csv").read().split("\n") | |
| bits = "" | |
| for x in d: | |
| r = x.split(", ") | |
| if len(r) > 4: | |
| if int(r[3]) == 0: | |
| if r[2] == "Note_on_c": | |
| bits += str(int(r[1]) % 2) | |
| print hex(int(bits[::-1], 2), 2)[2:].decode("hex")[::-1] |
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