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34 lines
668 B
Python
Executable file
34 lines
668 B
Python
Executable file
#! /usr/bin/python
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import os
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import sys
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import md5
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import cStringIO as StringIO
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plaintext = sys.stdin
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inf = os.fdopen(3)
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outf = sys.stdout
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for i in range(3):
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outf.write(inf.readline())
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# Set the low-order bits in output file
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i = 0
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while True:
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c = plaintext.read(1)
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if c:
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c = ord(c)
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else:
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c = 0
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img_bytes = inf.read(8)
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if not img_bytes:
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break
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if len(img_bytes) < 8:
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outf.write(img_bytes)
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break
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for j in range(8):
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bit = 7 - j
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img_byte = ord(img_bytes[j]) & 0xFE
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noise_bit = (c & (1<<bit)) >> bit
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out_byte = img_byte | noise_bit
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outf.write(chr(out_byte))
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