from sys import argv

magic = 28 # Defined here in case it needs to be changed.

with open(argv[1], 'rb') as dwf:
	data = bytearray(dwf.read())

count = 0

for byte in data:
	if count < 100:
		data[count] = (data[count] ^ count * magic) % 255
		count += 1
	else:
		break

output = argv[1][:-3] + 'swf'
with open(output, 'wb') as swf:
	swf.write(data)