103 lines
4.2 KiB
Python
103 lines
4.2 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import six
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import testtools
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from keystoneclient.middleware import memcache_crypt
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from keystoneclient.tests.unit import client_fixtures
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class MemcacheCryptPositiveTests(testtools.TestCase):
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def setUp(self):
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super(MemcacheCryptPositiveTests, self).setUp()
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self.useFixture(client_fixtures.Deprecations())
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def _setup_keys(self, strategy):
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return memcache_crypt.derive_keys(b'token', b'secret', strategy)
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def test_constant_time_compare(self):
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# make sure it works as a compare, the "constant time" aspect
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# isn't appropriate to test in unittests
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ctc = memcache_crypt.constant_time_compare
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self.assertTrue(ctc('abcd', 'abcd'))
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self.assertTrue(ctc('', ''))
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self.assertFalse(ctc('abcd', 'efgh'))
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self.assertFalse(ctc('abc', 'abcd'))
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self.assertFalse(ctc('abc', 'abc\x00'))
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self.assertFalse(ctc('', 'abc'))
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# For Python 3, we want to test these functions with both str and bytes
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# as input.
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if six.PY3:
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self.assertTrue(ctc(b'abcd', b'abcd'))
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self.assertTrue(ctc(b'', b''))
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self.assertFalse(ctc(b'abcd', b'efgh'))
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self.assertFalse(ctc(b'abc', b'abcd'))
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self.assertFalse(ctc(b'abc', b'abc\x00'))
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self.assertFalse(ctc(b'', b'abc'))
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def test_derive_keys(self):
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keys = self._setup_keys(b'strategy')
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self.assertEqual(len(keys['ENCRYPTION']),
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len(keys['CACHE_KEY']))
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self.assertEqual(len(keys['CACHE_KEY']),
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len(keys['MAC']))
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self.assertNotEqual(keys['ENCRYPTION'],
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keys['MAC'])
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self.assertIn('strategy', keys)
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def test_key_strategy_diff(self):
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k1 = self._setup_keys(b'MAC')
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k2 = self._setup_keys(b'ENCRYPT')
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self.assertNotEqual(k1, k2)
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def test_sign_data(self):
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keys = self._setup_keys(b'MAC')
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sig = memcache_crypt.sign_data(keys['MAC'], b'data')
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self.assertEqual(len(sig), memcache_crypt.DIGEST_LENGTH_B64)
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def test_encryption(self):
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keys = self._setup_keys(b'ENCRYPT')
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# what you put in is what you get out
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for data in [b'data', b'1234567890123456', b'\x00\xFF' * 13
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] + [six.int2byte(x % 256) * x for x in range(768)]:
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crypt = memcache_crypt.encrypt_data(keys['ENCRYPTION'], data)
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decrypt = memcache_crypt.decrypt_data(keys['ENCRYPTION'], crypt)
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self.assertEqual(data, decrypt)
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self.assertRaises(memcache_crypt.DecryptError,
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memcache_crypt.decrypt_data,
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keys['ENCRYPTION'], crypt[:-1])
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def test_protect_wrappers(self):
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data = b'My Pretty Little Data'
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for strategy in [b'MAC', b'ENCRYPT']:
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keys = self._setup_keys(strategy)
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protected = memcache_crypt.protect_data(keys, data)
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self.assertNotEqual(protected, data)
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if strategy == b'ENCRYPT':
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self.assertNotIn(data, protected)
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unprotected = memcache_crypt.unprotect_data(keys, protected)
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self.assertEqual(data, unprotected)
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self.assertRaises(memcache_crypt.InvalidMacError,
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memcache_crypt.unprotect_data,
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keys, protected[:-1])
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self.assertIsNone(memcache_crypt.unprotect_data(keys, None))
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def test_no_pycrypt(self):
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aes = memcache_crypt.AES
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memcache_crypt.AES = None
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self.assertRaises(memcache_crypt.CryptoUnavailableError,
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memcache_crypt.encrypt_data, 'token', 'secret',
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'data')
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memcache_crypt.AES = aes
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