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Merge lsb and lsbset tests
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Flavien
parent
3103a3ae9b
commit
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2 changed files with 117 additions and 287 deletions
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@ -2,7 +2,7 @@
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# -*- coding: utf-8 -*-
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# Stegano - Stegano is a pure Python steganography module.
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# Copyright (C) 2010-2022 Cédric Bonhomme - https://www.cedricbonhomme.org
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# Copyright (C) 2010-2022 Cédric Bonhomme - https://www.cedricbonhomme.org
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#
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# For more information : https://git.sr.ht/~cedric/stegano
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#
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@ -20,18 +20,18 @@
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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: 0.3 $"
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__date__ = "$Date: 2016/04/12 $"
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__revision__ = "$Date: 2017/05/04 $"
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__version__ = "$Revision: 0.6 $"
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__date__ = "$Date: 2016/04/13 $"
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__revision__ = "$Date: 2022/01/04 $"
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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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from stegano.lsb import generators
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class TestLSB(unittest.TestCase):
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@ -40,133 +40,170 @@ class TestLSB(unittest.TestCase):
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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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lsb.hide("./tests/sample-files/Lenna.png", "")
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lsb.hide("./tests/sample-files/Lenna.png", "", generators.eratosthenes())
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def test_hide_and_reveal(self):
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def test_hide_and_reveal_without_generator(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_hide_and_reveal_with_eratosthenes(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(
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"./tests/sample-files/Lenna.png", message, generators.eratosthenes()
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)
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secret.save("./image.png")
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clear_message = lsb.reveal("./image.png", generators.eratosthenes())
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self.assertEqual(message, clear_message)
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def test_hide_and_reveal_with_ackermann(self):
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messages_to_hide = ["foo"]
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for message in messages_to_hide:
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secret = lsb.hide(
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"./tests/sample-files/Lenna.png", message, generators.ackermann(m=3)
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)
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secret.save("./image.png")
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clear_message = lsb.reveal("./image.png", generators.ackermann(m=3))
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self.assertEqual(message, clear_message)
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def test_hide_and_reveal_with_shi_tomashi(self):
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messages_to_hide = ["foo bar"]
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for message in messages_to_hide:
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secret = lsb.hide(
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"./tests/sample-files/Lenna.png",
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message,
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generators.shi_tomashi("./tests/sample-files/Lenna.png"),
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)
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secret.save("./image.png")
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clear_message = lsb.reveal(
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"./image.png", generators.shi_tomashi("./tests/sample-files/Lenna.png")
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)
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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 = lsb.hide(
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"./tests/sample-files/Lenna.png", message, generators.eratosthenes(), 4
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)
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secret.save("./image.png")
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clear_message = lsb.reveal("./image.png", 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 = lsb.hide(
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"./tests/sample-files/Lenna.png", messages_to_hide, encoding="UTF-32LE"
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"./tests/sample-files/Lenna.png",
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messages_to_hide,
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generators.eratosthenes(),
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encoding="UTF-32LE",
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)
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secret.save("./image.png")
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clear_message = lsb.reveal("./image.png", encoding="UTF-32LE")
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clear_message = lsb.reveal(
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"./image.png", generators.eratosthenes(), encoding="UTF-32LE"
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)
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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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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(
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"./tests/sample-files/transparent.png", message, encoding="UTF-32LE"
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"./tests/sample-files/transparent.png",
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message,
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generators.eratosthenes(),
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)
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secret.save("./image.png")
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clear_message = lsb.reveal("./image.png", encoding="UTF-32LE")
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clear_message = lsb.reveal("./image.png", generators.eratosthenes())
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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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message_to_hide = "Hello World!"
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lsb.hide(
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"./tests/sample-files/Lenna-grayscale.png",
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message_to_hide,
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encoding="UTF-32LE",
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generators.eratosthenes(),
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)
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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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message_to_hide = "Hello World!"
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with self.assertRaises(Exception):
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lsb.hide(
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"./tests/sample-files/Lenna-grayscale.png",
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message_to_hide,
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encoding="UTF-32LE",
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generators.eratosthenes(),
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)
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def test_auto_convert_rgb(self):
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message_to_hide = "I love 🍕 and 🍫!"
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lsb.hide(
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"./tests/sample-files/Lenna-grayscale.png",
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message_to_hide,
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encoding="UTF-32LE",
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auto_convert_rgb=True,
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)
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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 Exception:
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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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outputBytes = io.BytesIO()
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with open("./tests/sample-files/20160505T130442.jpg", "rb") as f:
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bytes_image = lsb.hide(f, 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 test_with_location_of_image_as_argument(self):
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messages_to_hide = ["Hello World!"]
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for message in messages_to_hide:
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outputBytes = io.BytesIO()
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bytes_image = lsb.hide("./tests/sample-files/20160505T130442.jpg", message)
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bytes_image = lsb.hide(
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"./tests/sample-files/20160505T130442.jpg",
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message,
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generators.identity(),
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)
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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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clear_message = lsb.reveal(outputBytes, generators.identity())
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self.assertEqual(message, clear_message)
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def test_auto_convert_rgb(self):
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message_to_hide = "Hello World!"
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lsb.hide(
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"./tests/sample-files/Lenna-grayscale.png",
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message_to_hide,
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generators.eratosthenes(),
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auto_convert_rgb=True,
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)
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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, generators.identity())
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def test_hide_and_reveal_with_bad_generator(self):
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message_to_hide = "Hello World!"
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secret = lsb.hide(
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"./tests/sample-files/Lenna.png", message_to_hide, generators.eratosthenes()
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)
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secret.save("./image.png")
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with self.assertRaises(IndexError):
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lsb.reveal("./image.png", generators.identity())
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def test_with_unknown_generator(self):
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message_to_hide = "Hello World!"
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with self.assertRaises(AttributeError):
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lsb.hide(
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"./tests/sample-files/Lenna.png",
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message_to_hide,
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generators.unknown_generator(),
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)
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def tearDown(self):
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try:
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os.unlink("./image.png")
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