geoffrey/steginack
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Code Issues Releases Wiki Activity

Fixed image hiding and added inverse

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Geoffrey Frogeye 2015-04-23 10:39:08 +02:00
parent 63a4af6e0f
commit 3f34e955c8
1 changed files with 19 additions and 6 deletions
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25
steginack.py
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@ -18,14 +18,14 @@ def hideInFile(infile, hidefile, bits, outfile):
for x in range(inim.size[0]): for x in range(inim.size[0]):
for y in range(inim.size[1]): for y in range(inim.size[1]):
incol = inim.getpixel((x, y)) incol = inim.getpixel((x, y))
hidecol = inim.getpixel((x, y)) hidecol = hideim.getpixel((x, y))
outcol = [] outcol = []
for cp in range(len(incol)): for cp in range(len(incol)):
inbyt = get_bin(incol[cp], 8) inbyt = get_bin(incol[cp], 8)
hidebyt = get_bin(hidecol[cp], 8) hidebyt = get_bin(hidecol[cp], 8)
outbyt = list(inbyt) outbyt = list(inbyt)
for bit in range(bits): for bit in range(bits):
outbyt[-bit - 1] = inbyt[1] outbyt[-bit - 1] = hidebyt[bit]
outcol.append(int(''.join(outbyt), 2)) outcol.append(int(''.join(outbyt), 2))
outim.putpixel((x, y), tuple(outcol)) outim.putpixel((x, y), tuple(outcol))
eta.print_status(x * inim.size[1] + y) eta.print_status(x * inim.size[1] + y)
@ -35,10 +35,23 @@ def hideInFile(infile, hidefile, bits, outfile):
outim.save(outfile, 'PNG') outim.save(outfile, 'PNG')
def inverseFile(infile, bits, outfile): def inverseFile(infile, outfile):
inim = Image.open(infile) inim = Image.open(infile)
outim = Image.new('RGB', inim.size) outim = Image.new('RGB', inim.size)
assert 0 <= bits <= 8 eta = ETA(inim.size[0] * inim.size[1])
for x in range(inim.size[0]):
for y in range(inim.size[1]):
incol = inim.getpixel((x, y))
outcol = []
for cp in range(len(incol)):
inbyt = get_bin(incol[cp], 8)
outbyt = list(inbyt)
for bit in range(8):
outbyt[-bit - 1] = inbyt[bit]
outcol.append(int(''.join(outbyt), 2))
outim.putpixel((x, y), tuple(outcol))
eta.print_status(x * inim.size[1] + y)
eta.done()
inim.close() inim.close()
outim.save(outfile, 'PNG') outim.save(outfile, 'PNG')
@ -46,11 +59,11 @@ def inverseFile(infile, bits, outfile):
if __name__ == '__main__': if __name__ == '__main__':
parser = argparse.ArgumentParser(description="Hide an image inside another and decode images") parser = argparse.ArgumentParser(description="Hide an image inside another and decode images")
parser.add_argument('infile', metavar='INFILE', type=str, help="Input file") parser.add_argument('infile', metavar='INFILE', type=str, help="Input file")
parser.add_argument('bits', metavar='BITS', type=int, help="Number of bits to use")
parser.add_argument('outfile', metavar='OUTFILE', type=str, help="Output file") parser.add_argument('outfile', metavar='OUTFILE', type=str, help="Output file")
parser.add_argument('-b', '--bits', type=int, help="Number of bits to use for hiding")
parser.add_argument('-s', '--hide', type=str, help="File to hide") parser.add_argument('-s', '--hide', type=str, help="File to hide")
args = parser.parse_args() args = parser.parse_args()
if args.hide: if args.hide:
hideInFile(args.infile, args.hide, args.bits, args.outfile) hideInFile(args.infile, args.hide, args.bits, args.outfile)
else: else:
inverseFile(args.infile, args.bits, args.outfile) inverseFile(args.infile, args.outfile)