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109 lines
4 KiB
Python
109 lines
4 KiB
Python
#!/usr/bin/env python
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#-*- coding: utf-8 -*-
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# Stéganô - Stéganô is a basic Python Steganography module.
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# Copyright (C) 2010-2016 Cédric Bonhomme - https://www.cedricbonhomme.org
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#
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# For more information : https://github.com/cedricbonhomme/Stegano
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>
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__author__ = "Cedric Bonhomme"
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__version__ = "$Revision: 0.2 $"
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__date__ = "$Date: 2016/05/17 $"
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__license__ = "GPLv3"
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from PIL import Image
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import piexif
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def hide(input_image_file, img_enc, secret_message = None, secret_file = None):
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"""
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Hide a message (string) in an image.
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"""
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from zlib import compress
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from base64 import b64encode
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if secret_file != None:
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with open(secret_file, "r") as f:
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secret_file_content = f.read()
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text = compress(b64encode(bytes(secret_file_content, "utf-8")))
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else:
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text = compress(b64encode(bytes(secret_message, "utf-8")))
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img = Image.open(input_image_file)
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if "exif" in img.info:
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exif_dict = piexif.load(img.info["exif"])
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else:
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exif_dict = {}
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exif_dict["0th"] = {}
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exif_dict["0th"][piexif.ImageIFD.ImageDescription] = text
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exif_bytes = piexif.dump(exif_dict)
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img.save(img_enc, exif=exif_bytes)
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img.close()
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return img
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def reveal(input_image_file):
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"""
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Find a message in an image.
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"""
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from base64 import b64decode
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from zlib import decompress
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exif_dict = piexif.load(input_image_file)
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encoded_message = exif_dict["0th"][piexif.ImageIFD.ImageDescription]
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return b64decode(decompress(encoded_message))
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if __name__ == "__main__":
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# Point of entry in execution mode.
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from optparse import OptionParser
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parser = OptionParser(version=__version__)
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parser.add_option('--hide', action='store_true', default=False,
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help="Hides a message in an image.")
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parser.add_option('--reveal', action='store_true', default=False,
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help="Reveals the message hided in an image.")
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# Original image
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parser.add_option("-i", "--input", dest="input_image_file",
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help="Input image file.")
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# Image containing the secret
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parser.add_option("-o", "--output", dest="output_image_file",
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help="Output image containing the secret.")
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# Secret raw message to hide
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parser.add_option("-m", "--secret-message", dest="secret_message",
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help="Your raw secret message to hide.")
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# Secret text file to hide.
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parser.add_option("-f", "--secret-file", dest="secret_file",
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help="Your secret text file to hide.")
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parser.set_defaults(input_image_file = './pictures/Elisha-Cuthbert.jpg',
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output_image_file = './pictures/Elisha-Cuthbert_enc.jpg',
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secret_message = '', secret_file = '')
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(options, args) = parser.parse_args()
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if options.hide:
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if options.secret_message != "" and options.secret_file == "":
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hide(input_image_file=options.input_image_file, \
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img_enc=options.output_image_file, \
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secret_message=options.secret_message)
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elif options.secret_message == "" and options.secret_file != "":
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hide(input_image_file=options.input_image_file, \
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img_enc=options.output_image_file, \
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secret_file=options.secret_file)
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elif options.reveal:
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reveal(input_image_file=options.input_image_file)
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