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114 lines
3.5 KiB
Python
114 lines
3.5 KiB
Python
#!/usr/bin/env python
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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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#
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# For more information : https://git.sr.ht/~cedric/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 $"
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__revision__ = "$Date: 2017/01/18 $"
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__license__ = "GPLv3"
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import os
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import unittest
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import io
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from stegano import exifHeader
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class TestEXIFHeader(unittest.TestCase):
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def test_hide_empty_message(self):
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"""Test hiding the empty string."""
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secret = exifHeader.hide(
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"./tests/sample-files/20160505T130442.jpg", "./image.jpg", secret_message=""
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)
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# secret.save(""./image.png"")
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clear_message = exifHeader.reveal("./image.jpg")
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self.assertEqual(b"", clear_message)
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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 = exifHeader.hide(
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"./tests/sample-files/20160505T130442.jpg",
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"./image.jpg",
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secret_message=message,
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)
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clear_message = exifHeader.reveal("./image.jpg")
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self.assertEqual(message, message)
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def test_with_image_without_exif_data(self):
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secret = exifHeader.hide(
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"./tests/sample-files/Lenna.jpg", "./image.jpg", secret_message=""
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)
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# secret.save(""./image.png"")
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clear_message = exifHeader.reveal("./image.jpg")
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self.assertEqual(b"", clear_message)
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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, "rb") as f:
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message = f.read()
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secret = exifHeader.hide(
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"./tests/sample-files/20160505T130442.jpg",
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img_enc="./image.jpg",
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secret_file=text_file_to_hide,
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)
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clear_message = exifHeader.reveal("./image.jpg")
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self.assertEqual(message, clear_message)
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def test_with_png_image(self):
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secret = exifHeader.hide(
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"./tests/sample-files/Lenna.png", "./image.png", secret_message="Secret"
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)
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# secret.save(""./image.png"")
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with self.assertRaises(ValueError):
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clear_message = exifHeader.reveal("./image.png")
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def test_with_bytes(self):
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outputBytes = io.BytesIO()
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message = b"Secret"
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with open("./tests/sample-files/20160505T130442.jpg", "rb") as f:
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exifHeader.hide(f, outputBytes, secret_message=message)
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clear_message = exifHeader.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.jpg")
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except:
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pass
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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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