PlaidCTF 2012: 200 - Torrent

torrent.py

packets = []
f = open('packets', 'rb')
data = f.readlines()
f.close()

for line in data:
	line = line.strip()
	packets.append({'index': line.split('\t')[0], 'data': line.split('\t')[1]})
packets = sorted(packets, key=lambda packet: packet['index'])

f = open('torrent_out.bz2', 'wb')
for packet in packets:
	sz = ''.join(packet['data'].split(":"))
	f.write(sz.decode('hex'))
f.close()