29 lines
625 B
Python
29 lines
625 B
Python
import sys
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data = file(sys.argv[1], 'rb').readlines()
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uid = sys.argv[1].replace('.txt','')
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def parity(x):
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return ("{0:08b}".format(x).count('1') & 1)
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uid=raw_input("uid> ")
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fp = file(uid+'_generated.bin','wb')
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fp.write(uid.decode('hex')+"\x00"*2)
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bits = 0
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pbits = 0
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for l in data:
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if bits == 8:
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fp.write(chr(pbits))
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bits = 0
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pbits = 0
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hexbytes = filter(None, l.strip().split(' '))
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bits += 4
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for x in hexbytes:
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b = int(x.replace('!', ''), 16)
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p = parity(b)
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if '!' not in x:
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p^=1
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pbits <<= 1
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pbits |= p
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fp.write(chr(b))
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