mirror of
https://github.com/cedricbonhomme/Stegano.git
synced 2025-05-12 17:18:30 +02:00
248 lines
8.4 KiB
Python
248 lines
8.4 KiB
Python
#!/usr/bin/env python
|
|
# Stegano - Stegano is a pure Python steganography module.
|
|
# Copyright (C) 2010-2024 Cédric Bonhomme - https://www.cedricbonhomme.org
|
|
#
|
|
# For more information : https://git.sr.ht/~cedric/stegano
|
|
#
|
|
# This program is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program. If not, see <http://www.gnu.org/licenses/>
|
|
|
|
__author__ = "Cedric Bonhomme"
|
|
__version__ = "$Revision: 0.6 $"
|
|
__date__ = "$Date: 2016/04/13 $"
|
|
__revision__ = "$Date: 2022/01/04 $"
|
|
__license__ = "GPLv3"
|
|
|
|
import io
|
|
import os
|
|
import unittest
|
|
from unittest.mock import patch
|
|
|
|
from stegano import lsb
|
|
from stegano.lsb import generators
|
|
|
|
|
|
class TestLSB(unittest.TestCase):
|
|
def test_hide_empty_message(self):
|
|
"""
|
|
Test hiding the empty string.
|
|
"""
|
|
with self.assertRaises(AssertionError):
|
|
lsb.hide("./tests/sample-files/Lenna.png", "", generators.eratosthenes())
|
|
|
|
def test_hide_and_reveal_without_generator(self):
|
|
messages_to_hide = ["a", "foo", "Hello World!", ":Python:"]
|
|
for message in messages_to_hide:
|
|
secret = lsb.hide("./tests/sample-files/Lenna.png", message)
|
|
secret.save("./image.png")
|
|
|
|
clear_message = lsb.reveal("./image.png")
|
|
|
|
self.assertEqual(message, clear_message)
|
|
|
|
def test_hide_and_reveal_with_eratosthenes(self):
|
|
messages_to_hide = ["a", "foo", "Hello World!", ":Python:"]
|
|
for message in messages_to_hide:
|
|
secret = lsb.hide(
|
|
"./tests/sample-files/Lenna.png", message, generators.eratosthenes()
|
|
)
|
|
secret.save("./image.png")
|
|
|
|
clear_message = lsb.reveal("./image.png", generators.eratosthenes())
|
|
|
|
self.assertEqual(message, clear_message)
|
|
|
|
def test_hide_and_reveal_with_ackermann(self):
|
|
messages_to_hide = ["foo"]
|
|
for message in messages_to_hide:
|
|
secret = lsb.hide(
|
|
"./tests/sample-files/Lenna.png", message, generators.ackermann(m=3)
|
|
)
|
|
secret.save("./image.png")
|
|
|
|
clear_message = lsb.reveal("./image.png", generators.ackermann(m=3))
|
|
|
|
self.assertEqual(message, clear_message)
|
|
|
|
def test_hide_and_reveal_with_ackermann_naive(self):
|
|
messages_to_hide = ["foo"]
|
|
for message in messages_to_hide:
|
|
secret = lsb.hide(
|
|
"./tests/sample-files/Lenna.png",
|
|
message,
|
|
generators.ackermann_naive(m=2),
|
|
)
|
|
secret.save("./image.png")
|
|
|
|
clear_message = lsb.reveal("./image.png", generators.ackermann_naive(m=2))
|
|
|
|
self.assertEqual(message, clear_message)
|
|
|
|
def test_hide_and_reveal_with_mersenne(self):
|
|
messages_to_hide = ["f"]
|
|
for message in messages_to_hide:
|
|
secret = lsb.hide(
|
|
"./tests/sample-files/Montenach.png",
|
|
message,
|
|
generators.mersenne(),
|
|
)
|
|
secret.save("./image.png")
|
|
|
|
clear_message = lsb.reveal("./image.png", generators.mersenne())
|
|
|
|
self.assertEqual(message, clear_message)
|
|
|
|
def test_hide_and_reveal_with_shi_tomashi(self):
|
|
messages_to_hide = ["foo bar"]
|
|
for message in messages_to_hide:
|
|
secret = lsb.hide(
|
|
"./tests/sample-files/Lenna.png",
|
|
message,
|
|
generators.shi_tomashi("./tests/sample-files/Lenna.png"),
|
|
)
|
|
secret.save("./image.png")
|
|
|
|
clear_message = lsb.reveal(
|
|
"./image.png", generators.shi_tomashi("./tests/sample-files/Lenna.png")
|
|
)
|
|
|
|
self.assertEqual(message, clear_message)
|
|
|
|
def test_hide_and_reveal_with_shift(self):
|
|
messages_to_hide = ["a", "foo", "Hello World!", ":Python:"]
|
|
for message in messages_to_hide:
|
|
secret = lsb.hide(
|
|
"./tests/sample-files/Lenna.png", message, generators.eratosthenes(), 4
|
|
)
|
|
secret.save("./image.png")
|
|
|
|
clear_message = lsb.reveal("./image.png", generators.eratosthenes(), 4)
|
|
|
|
self.assertEqual(message, clear_message)
|
|
|
|
def test_hide_and_reveal_UTF32LE(self):
|
|
messages_to_hide = "I love 🍕 and 🍫!"
|
|
secret = lsb.hide(
|
|
"./tests/sample-files/Lenna.png",
|
|
messages_to_hide,
|
|
generators.eratosthenes(),
|
|
encoding="UTF-32LE",
|
|
)
|
|
secret.save("./image.png")
|
|
|
|
clear_message = lsb.reveal(
|
|
"./image.png", generators.eratosthenes(), encoding="UTF-32LE"
|
|
)
|
|
self.assertEqual(messages_to_hide, clear_message)
|
|
|
|
def test_with_transparent_png(self):
|
|
messages_to_hide = ["a", "foo", "Hello World!", ":Python:"]
|
|
for message in messages_to_hide:
|
|
secret = lsb.hide(
|
|
"./tests/sample-files/transparent.png",
|
|
message,
|
|
generators.eratosthenes(),
|
|
)
|
|
secret.save("./image.png")
|
|
|
|
clear_message = lsb.reveal("./image.png", generators.eratosthenes())
|
|
|
|
self.assertEqual(message, clear_message)
|
|
|
|
@patch("builtins.input", return_value="y")
|
|
def test_manual_convert_rgb(self, input):
|
|
message_to_hide = "Hello World!"
|
|
lsb.hide(
|
|
"./tests/sample-files/Lenna-grayscale.png",
|
|
message_to_hide,
|
|
generators.eratosthenes(),
|
|
)
|
|
|
|
@patch("builtins.input", return_value="n")
|
|
def test_refuse_convert_rgb(self, input):
|
|
message_to_hide = "Hello World!"
|
|
# lsb.hide(
|
|
# "./tests/sample-files/Lenna-grayscale.png",
|
|
# message_to_hide,
|
|
# generators.eratosthenes(),
|
|
# )
|
|
with self.assertRaisesRegex(Exception, "Not a RGB image."):
|
|
lsb.hide(
|
|
"./tests/sample-files/Lenna-grayscale.png",
|
|
message_to_hide,
|
|
generators.eratosthenes(),
|
|
)
|
|
|
|
def test_with_location_of_image_as_argument(self):
|
|
messages_to_hide = ["Hello World!"]
|
|
|
|
for message in messages_to_hide:
|
|
outputBytes = io.BytesIO()
|
|
bytes_image = lsb.hide(
|
|
"./tests/sample-files/20160505T130442.jpg",
|
|
message,
|
|
generators.identity(),
|
|
)
|
|
bytes_image.save(outputBytes, "PNG")
|
|
outputBytes.seek(0)
|
|
|
|
clear_message = lsb.reveal(outputBytes, generators.identity())
|
|
|
|
self.assertEqual(message, clear_message)
|
|
|
|
def test_auto_convert_rgb(self):
|
|
message_to_hide = "Hello World!"
|
|
lsb.hide(
|
|
"./tests/sample-files/Lenna-grayscale.png",
|
|
message_to_hide,
|
|
generators.eratosthenes(),
|
|
auto_convert_rgb=True,
|
|
)
|
|
|
|
def test_with_too_long_message(self):
|
|
with open("./tests/sample-files/lorem_ipsum.txt") as f:
|
|
message = f.read()
|
|
message += message * 2
|
|
with self.assertRaisesRegex(
|
|
Exception, "The message you want to hide is too long:"
|
|
):
|
|
lsb.hide("./tests/sample-files/Lenna.png", message, generators.identity())
|
|
|
|
def test_hide_and_reveal_with_bad_generator(self):
|
|
message_to_hide = "Hello World!"
|
|
secret = lsb.hide(
|
|
"./tests/sample-files/Lenna.png", message_to_hide, generators.eratosthenes()
|
|
)
|
|
secret.save("./image.png")
|
|
|
|
with self.assertRaises(IndexError):
|
|
lsb.reveal("./image.png", generators.identity())
|
|
|
|
def test_with_unknown_generator(self):
|
|
message_to_hide = "Hello World!"
|
|
with self.assertRaises(AttributeError):
|
|
lsb.hide(
|
|
"./tests/sample-files/Lenna.png",
|
|
message_to_hide,
|
|
generators.unknown_generator(), # type: ignore
|
|
)
|
|
|
|
def tearDown(self):
|
|
try:
|
|
os.unlink("./image.png")
|
|
except Exception:
|
|
pass
|
|
|
|
|
|
if __name__ == "__main__":
|
|
unittest.main()
|