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https://github.com/cedricbonhomme/Stegano.git
synced 2025-05-12 09:08:31 +02:00
added a shift parameter for the lsbset module.
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Cédric Bonhomme
parent
a86361dd27
commit
ea2de8142c
6 changed files with 47 additions and 15 deletions
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@ -1,6 +1,11 @@
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Release History
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===============
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0.9.0 (2018-12-18)
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------------------
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* added the possibility to shift the encoded bits when using the lsbset module.
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0.8.6 (2018-11-05)
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------------------
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@ -55,6 +55,8 @@ parser_hide.add_argument("-g", "--generator", dest="generator_function",
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choices=[generator[0] for generator in \
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inspect.getmembers(generators, inspect.isfunction)],
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required=True, help="Generator")
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parser_hide.add_argument("-s", "--shift", dest="shift",
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default=0, help="Shift for the generator")
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group_secret = parser_hide.add_mutually_exclusive_group(required=True)
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# Non binary secret message to hide
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@ -81,6 +83,8 @@ parser_reveal.add_argument("-g", "--generator", dest="generator_function",
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choices=[generator[0] for generator in \
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inspect.getmembers(generators, inspect.isfunction)],
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required=True, help="Generator")
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parser_reveal.add_argument("-s", "--shift", dest="shift",
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default=0, help="Shift for the generator")
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parser_reveal.add_argument("-o", dest="secret_binary",
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help="Output for the binary secret (Text or any binary file).")
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@ -111,7 +115,8 @@ if arguments.command == 'hide':
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elif arguments.secret_file != "":
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secret = tools.binary2base64(arguments.secret_file)
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img_encoded = lsbset.hide(arguments.input_image_file, secret, generator)
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img_encoded = lsbset.hide(arguments.input_image_file, secret, generator,
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int(arguments.shift))
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try:
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img_encoded.save(arguments.output_image_file)
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except Exception as e:
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@ -120,7 +125,8 @@ if arguments.command == 'hide':
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elif arguments.command == 'reveal':
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try:
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secret = lsbset.reveal(arguments.input_image_file, generator)
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secret = lsbset.reveal(arguments.input_image_file, generator,
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int(arguments.shift))
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except IndexError:
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print("Impossible to detect message.")
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exit(0)
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2
setup.py
2
setup.py
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@ -33,7 +33,7 @@ with codecs.open(os.path.join(here, 'CHANGELOG.rst'), encoding='utf-8') as f:
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setup(
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name='Stegano',
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version='0.8.6',
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version='0.9.0',
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author='Cédric Bonhomme',
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author_email='cedric@cedricbonhomme.org',
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packages=packages,
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@ -2,7 +2,7 @@
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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) 2010-2017 Cédric Bonhomme - https://www.cedricbonhomme.org
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# Copyright (C) 2010-2018 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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@ -20,9 +20,9 @@
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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: 0.5 $"
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__version__ = "$Revision: 0.6 $"
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__date__ = "$Date: 2016/03/13 $"
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__revision__ = "$Date: 2017/05/04 $"
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__revision__ = "$Date: 2018/12/18 $"
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__license__ = "GPLv3"
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import sys
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@ -36,6 +36,7 @@ from . import generators
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def hide(input_image: Union[str, IO[bytes]],
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message: str,
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generator: Iterator[int],
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shift: int = 0,
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encoding: str = 'UTF-8',
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auto_convert_rgb: bool = False):
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"""Hide a message (string) in an image with the
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@ -68,6 +69,9 @@ def hide(input_image: Union[str, IO[bytes]],
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if len_message_bits > npixels * 3:
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raise Exception("The message you want to hide is too long: {}". \
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format(message_length))
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while shift != 0:
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next(generator)
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shift -= 1
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while index + 3 <= len_message_bits :
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generated_number = next(generator)
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@ -97,6 +101,7 @@ def hide(input_image: Union[str, IO[bytes]],
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def reveal(input_image: Union[str, IO[bytes]],
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generator: Iterator[int],
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shift: int = 0,
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encoding: str = 'UTF-8'):
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"""Find a message in an image (with the LSB technique).
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"""
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@ -107,6 +112,10 @@ def reveal(input_image: Union[str, IO[bytes]],
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bitab = []
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limit = None
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while shift != 0:
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next(generator)
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shift -= 1
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while True:
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generated_number = next(generator)
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# color = [r, g, b]
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@ -54,20 +54,20 @@ class TestLSB(unittest.TestCase):
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def test_hide_and_reveal_UTF32LE(self):
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messages_to_hide = 'I love 🍕 and 🍫!'
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secret = lsb.hide("./tests/sample-files/Lenna.png",
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messages_to_hide, 'UTF-32LE')
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messages_to_hide, encoding='UTF-32LE')
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secret.save("./image.png")
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clear_message = lsb.reveal("./image.png", 'UTF-32LE')
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clear_message = lsb.reveal("./image.png", encoding='UTF-32LE')
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self.assertEqual(messages_to_hide, clear_message)
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def test_with_transparent_png(self):
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messages_to_hide = ['🍕', 'a', 'foo', 'Hello World!', ':Python:']
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for message in messages_to_hide:
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secret = lsb.hide("./tests/sample-files/transparent.png",
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message, 'UTF-32LE')
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message, encoding='UTF-32LE')
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secret.save("./image.png")
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clear_message = lsb.reveal("./image.png", 'UTF-32LE')
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clear_message = lsb.reveal("./image.png", encoding='UTF-32LE')
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self.assertEqual(message, clear_message)
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@ -75,19 +75,19 @@ class TestLSB(unittest.TestCase):
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def test_manual_convert_rgb(self, input):
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message_to_hide = 'I love 🍕 and 🍫!'
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secret = lsb.hide("./tests/sample-files/Lenna-grayscale.png",
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message_to_hide, 'UTF-32LE')
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message_to_hide, encoding='UTF-32LE')
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@patch('builtins.input', return_value='n')
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def test_refuse_convert_rgb(self, input):
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message_to_hide = 'I love 🍕 and 🍫!'
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with self.assertRaises(Exception):
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secret = lsb.hide("./tests/sample-files/Lenna-grayscale.png",
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message_to_hide, 'UTF-32LE')
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message_to_hide, encoding='UTF-32LE')
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def test_auto_convert_rgb(self):
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message_to_hide = 'I love 🍕 and 🍫!'
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secret = lsb.hide("./tests/sample-files/Lenna-grayscale.png",
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message_to_hide, 'UTF-32LE', True)
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message_to_hide, encoding='UTF-32LE', auto_convert_rgb=True)
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def test_with_text_file(self):
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text_file_to_hide = './tests/sample-files/lorem_ipsum.txt'
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@ -53,17 +53,29 @@ class TestLSBSet(unittest.TestCase):
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generators.eratosthenes())
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self.assertEqual(message, clear_message)
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def test_hide_and_reveal_with_shift(self):
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messages_to_hide = ["a", "foo", "Hello World!", ":Python:"]
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for message in messages_to_hide:
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secret = lsbset.hide("./tests/sample-files/Lenna.png", message,
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generators.eratosthenes(), 4)
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secret.save("./image.png")
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clear_message = lsbset.reveal("./image.png",
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generators.eratosthenes(), 4)
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self.assertEqual(message, clear_message)
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def test_hide_and_reveal_UTF32LE(self):
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messages_to_hide = 'I love 🍕 and 🍫!'
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secret = lsbset.hide("./tests/sample-files/Lenna.png",
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messages_to_hide,
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generators.eratosthenes(),
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'UTF-32LE')
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encoding='UTF-32LE')
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secret.save("./image.png")
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clear_message = lsbset.reveal("./image.png", generators.eratosthenes(),
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'UTF-32LE')
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encoding='UTF-32LE')
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self.assertEqual(messages_to_hide, clear_message)
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def test_with_transparent_png(self):
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