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# Copyright (c) 2016 The Johns Hopkins University/Applied Physics Laboratory
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import testtools
from kmip.core import enums
from kmip.core import exceptions
from kmip.services.server import crypto
class TestCryptographyEngine(testtools.TestCase):
"""
Test suite for the CryptographyEngine.
"""
def setUp(self):
super(TestCryptographyEngine, self).setUp()
def tearDown(self):
super(TestCryptographyEngine, self).tearDown()
def test_init(self):
"""
Test that a CryptographyEngine can be constructed.
"""
crypto.CryptographyEngine()
def test_create_symmetric_key(self):
"""
Test that a symmetric key can be created with valid arguments.
"""
engine = crypto.CryptographyEngine()
key = engine.create_symmetric_key(
enums.CryptographicAlgorithm.AES,
256
)
self.assertIn('value', key)
self.assertIn('format', key)
self.assertEqual(enums.KeyFormatType.RAW, key.get('format'))
def test_create_symmetric_key_with_invalid_algorithm(self):
"""
Test that an InvalidField error is raised when creating a symmetric
key with an invalid algorithm.
"""
engine = crypto.CryptographyEngine()
args = ['invalid', 256]
self.assertRaises(
exceptions.InvalidField,
engine.create_symmetric_key,
*args
)
def test_create_symmetric_key_with_invalid_length(self):
"""
Test that an InvalidField error is raised when creating a symmetric
key with an invalid length.
"""
engine = crypto.CryptographyEngine()
args = [enums.CryptographicAlgorithm.AES, 'invalid']
self.assertRaises(
exceptions.InvalidField,
engine.create_symmetric_key,
*args
)
def test_create_symmetric_key_with_cryptographic_failure(self):
"""
Test that a CryptographicFailure error is raised when the symmetric
key generation process fails.
"""
# Create a dummy algorithm that always fails on instantiation.
class DummyAlgorithm(object):
key_sizes = [0]
def __init__(self, key_bytes):
raise Exception()
engine = crypto.CryptographyEngine()
engine._symmetric_key_algorithms.update([(
enums.CryptographicAlgorithm.AES,
DummyAlgorithm
)])
args = [enums.CryptographicAlgorithm.AES, 0]
self.assertRaises(
exceptions.CryptographicFailure,
engine.create_symmetric_key,
*args
)
def test_create_asymmetric_key(self):
"""
Test that an asymmetric key pair can be created with valid arguments.
"""
engine = crypto.CryptographyEngine()
public_key, private_key = engine.create_asymmetric_key_pair(
enums.CryptographicAlgorithm.RSA,
2048
)
self.assertIn('value', public_key)
self.assertIn('format', public_key)
self.assertIn('value', private_key)
self.assertIn('format', private_key)
def test_create_asymmetric_key_with_invalid_algorithm(self):
"""
Test that an InvalidField error is raised when creating an asymmetric
key pair with an invalid algorithm.
"""
engine = crypto.CryptographyEngine()
args = ['invalid', 2048]
self.assertRaises(
exceptions.InvalidField,
engine.create_asymmetric_key_pair,
*args
)
def test_create_asymmetric_key_with_invalid_length(self):
"""
Test that an CryptographicFailure error is raised when creating an
asymmetric key pair with an invalid length.
"""
engine = crypto.CryptographyEngine()
args = [enums.CryptographicAlgorithm.RSA, 0]
self.assertRaises(
exceptions.CryptographicFailure,
engine.create_asymmetric_key_pair,
*args
)
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