mirror of
https://github.com/cedricbonhomme/Stegano.git
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144 lines
5 KiB
Python
144 lines
5 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) 2010-2017 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: 2016/04/12 $"
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__revision__ = "$Date: 2017/02/22 $"
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__license__ = "GPLv3"
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import io
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import os
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import base64
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import unittest
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from unittest.mock import patch
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from stegano import lsb
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class TestLSB(unittest.TestCase):
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def test_hide_empty_message(self):
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"""
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Test hiding the empty string.
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"""
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with self.assertRaises(AssertionError):
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secret = lsb.hide("./tests/sample-files/Lenna.png", "")
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def test_hide_and_reveal(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/Lenna.png", message)
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secret.save("./image.png")
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clear_message = lsb.reveal("./image.png")
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self.assertEqual(message, 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", message)
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secret.save("./image.png")
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clear_message = lsb.reveal("./image.png")
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self.assertEqual(message, clear_message)
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@patch('builtins.input', return_value='y')
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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)
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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)
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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, 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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with open(text_file_to_hide) as f:
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message = f.read()
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secret = lsb.hide("./tests/sample-files/Lenna.png", message)
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secret.save("./image.png")
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clear_message = lsb.reveal("./image.png")
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self.assertEqual(message, clear_message)
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def test_with_binary_file(self):
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binary_file_to_hide = "./tests/sample-files/free-software-song.ogg"
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with open(binary_file_to_hide, "rb") as bin_file:
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encoded_string = base64.b64encode(bin_file.read())
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message = encoded_string.decode()
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secret = lsb.hide("./tests/sample-files/Montenach.png", message)
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secret.save("./image.png")
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clear_message = lsb.reveal("./image.png")
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clear_message += '==='
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clear_message = base64.b64decode(clear_message)
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with open('file1', 'wb') as f:
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f.write(clear_message)
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with open('file1', 'rb') as bin_file:
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encoded_string = base64.b64encode(bin_file.read())
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message1 = encoded_string.decode()
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self.assertEqual(message, message1)
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try:
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os.unlink('./file1')
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except:
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pass
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def test_with_too_long_message(self):
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with open("./tests/sample-files/lorem_ipsum.txt") as f:
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message = f.read()
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message += message*2
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with self.assertRaises(Exception):
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lsb.hide("./tests/sample-files/Lenna.png", message)
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def test_with_bytes(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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message = "Hello World"
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outputBytes = io.BytesIO()
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bytes_image = lsb.hide(open("./tests/sample-files/20160505T130442.jpg", 'rb'), message)
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bytes_image.save(outputBytes, "PNG")
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outputBytes.seek(0)
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clear_message = lsb.reveal(outputBytes)
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self.assertEqual(message, clear_message)
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def tearDown(self):
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try:
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os.unlink("./image.png")
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except:
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pass
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if __name__ == '__main__':
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unittest.main()
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