104 lines
3.3 KiB
Python
104 lines
3.3 KiB
Python
# -*- coding: utf-8 -*-
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#
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# SelfTest/Cipher/CAST.py: Self-test for the CAST-128 (CAST5) cipher
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#
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# Written in 2008 by Dwayne C. Litzenberger <dlitz@dlitz.net>
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#
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# ===================================================================
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# The contents of this file are dedicated to the public domain. To
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# the extent that dedication to the public domain is not available,
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# everyone is granted a worldwide, perpetual, royalty-free,
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# non-exclusive license to exercise all rights associated with the
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# contents of this file for any purpose whatsoever.
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# No rights are reserved.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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# ===================================================================
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"""Self-test suite for Crypto.Cipher.CAST"""
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import unittest
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from Crypto.Util.py3compat import bchr
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from Crypto.Cipher import CAST
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# This is a list of (plaintext, ciphertext, key) tuples.
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test_data = [
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# Test vectors from RFC 2144, B.1
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('0123456789abcdef', '238b4fe5847e44b2',
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'0123456712345678234567893456789a',
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'128-bit key'),
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('0123456789abcdef', 'eb6a711a2c02271b',
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'01234567123456782345',
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'80-bit key'),
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('0123456789abcdef', '7ac816d16e9b302e',
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'0123456712',
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'40-bit key'),
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]
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class KeyLength(unittest.TestCase):
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def runTest(self):
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self.assertRaises(ValueError, CAST.new, bchr(0) * 4, CAST.MODE_ECB)
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self.assertRaises(ValueError, CAST.new, bchr(0) * 17, CAST.MODE_ECB)
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class TestOutput(unittest.TestCase):
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def runTest(self):
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# Encrypt/Decrypt data and test output parameter
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cipher = CAST.new(b'4'*16, CAST.MODE_ECB)
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pt = b'5' * 16
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ct = cipher.encrypt(pt)
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output = bytearray(16)
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res = cipher.encrypt(pt, output=output)
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self.assertEqual(ct, output)
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self.assertEqual(res, None)
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res = cipher.decrypt(ct, output=output)
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self.assertEqual(pt, output)
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self.assertEqual(res, None)
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import sys
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if sys.version[:3] != '2.6':
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output = memoryview(bytearray(16))
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cipher.encrypt(pt, output=output)
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self.assertEqual(ct, output)
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cipher.decrypt(ct, output=output)
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self.assertEqual(pt, output)
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self.assertRaises(TypeError, cipher.encrypt, pt, output=b'0'*16)
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self.assertRaises(TypeError, cipher.decrypt, ct, output=b'0'*16)
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shorter_output = bytearray(7)
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self.assertRaises(ValueError, cipher.encrypt, pt, output=shorter_output)
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self.assertRaises(ValueError, cipher.decrypt, ct, output=shorter_output)
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def get_tests(config={}):
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from .common import make_block_tests
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tests = make_block_tests(CAST, "CAST", test_data)
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tests.append(KeyLength())
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tests.append(TestOutput())
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return tests
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if __name__ == '__main__':
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suite = lambda: unittest.TestSuite(get_tests())
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unittest.main(defaultTest='suite')
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