Steganography Code

For uses in encryption, type:

 python cripto.py -e image.png

Where image.png is the name of the image where the code is going to encrypt.

 For use in decryption, type: 

 python cripto.py -d image.png

Where image.png is the name of the image where the code is going to be extracted.

The images with code embedded are: 2, 3, 5.

The code used to encrypt-decipher the messages from the images is the following: 

	import Image
	import sys
	def serie(x):
	return (x + 21)
	def convert_bin(msg):
	bin_str = ""
	for letter in msg:
	bin_str += bin(abec.index(letter))[2:].zfill(len(bin(len(abec))[2:]))
	return bin_str
	def decodify(bin_str):
	letter = ""
	msg = ""
	for i in range(len(bin_str)):
	letter += bin_str[i]
	if len(letter) == len(bin(len(abec))[2:]):
	if abec[int(letter, 2)] == '\0':
	return msg
	msg += abec[int(letter, 2)]
	letter = ""
	return msg
	mode = sys.argv[1]
	name = sys.argv[2]
	abec = ['c', 'P', 'U', 'x', ':', 'f', 'R', 'E', 'a', '"', 'q', '7', 'g', 'T', '+', 'Q', 'o', '#', ',', '2', 'b', 'h', 'k', '\n', 'Z', '\0', 'l', ']', '%', 'W', 'G', 'z', 'd', 's', '0', 'u', '-', 'O', ' ', '=', 'J', 'I', '\t', 'C', '.', 'N', '1', 'K', 'D', 'B', '5', 'F', '>', 'I', 'y', 'H', 'w', 'L', "'", 't', 'A', '\\', 'j', 'X', 'i', 'v', 'P', 'r', '_', '3', ')', 'n', 'm', 'M', '!', 'V', 'Y', '*', '[', '9', 'e', '(', 'p']
	im = Image.open(name)
	pix = im.load()
	width, height = im.size
	f = open(sys.argv[0], 'r')
	msg = f.read() + '\0'
	cont = 0
	if mode == "-e":
	print "Encrypting %s ..."%name
	msg = convert_bin(msg)
	bit = 0
	for i in range(width):
	for j in range(height):
	new = [0, 0, 0]
	old = pix[i, j]
	if cont == serie(bit):
	for k in range(len(pix[i, j])):
	curr = bin(pix[i, j][k])[2:].zfill(len(bin(len(abec))[2:]))
	for m in range(1, 3):
	curr = list(curr)
	curr[len(curr)-m] = msg[bit]
	curr = "".join(curr)
	new[k] = int(curr, 2)
	bit += 1
	if bit >= len(msg):
	pix[i, j] = (new[0], new[1], new[2])
	im.save("output_%s"%name.replace(".jpg", ""))
	print "Done!"
	sys.exit()
	pix[i, j] = (new[0], new[1], new[2])
	else:
	cont += 1
	elif mode == "-d":
	bit = 0
	binary_str = ""
	cont = 0
	print "Deciphering %s ..."%name
	try:
	for i in range(width):
	for j in range(height):
	if cont == serie(bit):
	for k in range(len(pix[i, j])):
	curr = bin(pix[i, j][k])[2:].zfill(len(bin(len(abec))[2:]))
	for m in range(1, 3):
	curr = list(curr)
	binary_str += curr[len(curr) - m]
	bit += 1
	else:
	cont += 1
	print decodify(binary_str)
	sys.exit()
	except IndexError:
	print "Ups. Not here"

view raw cripto.py hosted with ❤ by GitHub

Note: The Images have to be clicked and downloaded from the URL(from the Gallery), or else they will be downloaded in a different size and the data will be lost.