geoffrey/steginack
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Geoffrey Frogeye 2015-04-23 12:48:33 +02:00
parent be39a7d840
commit 3921dddaad
1 changed files with 17 additions and 26 deletions
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steginack.py
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@ -2,58 +2,49 @@
from PIL import Image from PIL import Image
import argparse import argparse
from eta import ETA
get_bin = lambda x, n: x >= 0 and str(bin(x))[2:].zfill(n) or "-" + str(bin(x))[3:].zfill(n)
# From http://stackoverflow.com/a/21732313/2766106
def hideInFile(args): def hideInFile(args):
inim = Image.open(args.infile) inim = Image.open(args.infile)
hideim = Image.open(args.hidefile) hideim = Image.open(args.hidefile)
assert inim.size == hideim.size, "Both image must be of the same size" assert inim.size == hideim.size, "Both image must be of the same size"
assert 0 <= args.bits <= 8 bits = args.bits
assert 0 <= bits <= 8
outim = Image.new('RGB', inim.size) outim = Image.new('RGB', inim.size)
eta = ETA(inim.size[0] * inim.size[1])
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 = hideim.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 = '{0:08b}'.format(incol[cp])
hidebyt = get_bin(hidecol[cp], 8) hidebyt = '{0:08b}'.format(hidecol[cp])
outbyt = list(inbyt) outbyt = inbyt[:8 - bits] + hidebyt[bits - 1::-1]
for bit in range(args.bits): outcol.append(int(outbyt, 2))
outbyt[-bit - 1] = hidebyt[bit]
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.done()
inim.close() inim.close()
hideim.close() hideim.close()
outim.save(args.outfile, 'PNG') outim.save(args.outfile, 'PNG')
outim.close()
def inverseFile(args): def inverseFile(args):
inim = Image.open(args.infile) inim = Image.open(args.infile)
outim = Image.new('RGB', inim.size) outim = Image.new('RGB', inim.size)
eta = ETA(inim.size[0] * inim.size[1]) xS, yS = inim.size[0], inim.size[1]
for x in range(inim.size[0]): for x in range(xS):
for y in range(inim.size[1]): for y in range(yS):
incol = inim.getpixel((x, y)) pos = (x, y)
incol = inim.getpixel(pos)
outcol = [] outcol = []
for cp in range(len(incol)): for cp in range(len(incol)):
inbyt = get_bin(incol[cp], 8) inbyt = '{0:08b}'.format(incol[cp])
outbyt = list(inbyt) outbyt = inbyt[::-1]
for bit in range(8): outcol.append(int(outbyt, 2))
outbyt[-bit - 1] = inbyt[bit] outim.putpixel(pos, tuple(outcol))
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(args.outfile, 'PNG') outim.save(args.outfile, 'PNG')
outim.close()
if __name__ == '__main__': if __name__ == '__main__':