tests/hazmat/primitives/test_cast5.py


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# 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.

from __future__ import absolute_import, division, print_function

import binascii
import os

import pytest

from cryptography.hazmat.primitives.ciphers import algorithms, modes

from .utils import generate_encrypt_test
from ...utils import load_nist_vectors


@pytest.mark.supported(
    only_if=lambda backend: backend.cipher_supported(
        algorithms.CAST5("\x00" * 16), modes.ECB()
    ),
    skip_message="Does not support CAST5 ECB",
)
@pytest.mark.cipher
class TestCAST5ModeECB(object):
    test_ECB = generate_encrypt_test(
        load_nist_vectors,
        os.path.join("ciphers", "CAST5"),
        ["cast5-ecb.txt"],
        lambda key, **kwargs: algorithms.CAST5(binascii.unhexlify((key))),
        lambda **kwargs: modes.ECB(),
    )


@pytest.mark.supported(
    only_if=lambda backend: backend.cipher_supported(
        algorithms.CAST5("\x00" * 16), modes.CBC("\x00" * 8)
    ),
    skip_message="Does not support CAST5 CBC",
)
@pytest.mark.cipher
class TestCAST5ModeCBC(object):
    test_CBC = generate_encrypt_test(
        load_nist_vectors,
        os.path.join("ciphers", "CAST5"),
        ["cast5-cbc.txt"],
        lambda key, **kwargs: algorithms.CAST5(binascii.unhexlify((key))),
        lambda iv, **kwargs: modes.CBC(binascii.unhexlify(iv))
    )


@pytest.mark.supported(
    only_if=lambda backend: backend.cipher_supported(
        algorithms.CAST5("\x00" * 16), modes.OFB("\x00" * 8)
    ),
    skip_message="Does not support CAST5 OFB",
)
@pytest.mark.cipher
class TestCAST5ModeOFB(object):
    test_OFB = generate_encrypt_test(
        load_nist_vectors,
        os.path.join("ciphers", "CAST5"),
        ["cast5-ofb.txt"],
        lambda key, **kwargs: algorithms.CAST5(binascii.unhexlify((key))),
        lambda iv, **kwargs: modes.OFB(binascii.unhexlify(iv))
    )


@pytest.mark.supported(
    only_if=lambda backend: backend.cipher_supported(
        algorithms.CAST5("\x00" * 16), modes.CFB("\x00" * 8)
    ),
    skip_message="Does not support CAST5 CFB",
)
@pytest.mark.cipher
class TestCAST5ModeCFB(object):
    test_CFB = generate_encrypt_test(
        load_nist_vectors,
        os.path.join("ciphers", "CAST5"),
        ["cast5-cfb.txt"],
        lambda key, **kwargs: algorithms.CAST5(binascii.unhexlify((key))),
        lambda iv, **kwargs: modes.CFB(binascii.unhexlify(iv))
    )


@pytest.mark.supported(
    only_if=lambda backend: backend.cipher_supported(
        algorithms.CAST5("\x00" * 16), modes.CTR("\x00" * 8)
    ),
    skip_message="Does not support CAST5 CTR",
)
@pytest.mark.cipher
class TestCAST5ModeCTR(object):
    test_CTR = generate_encrypt_test(
        load_nist_vectors,
        os.path.join("ciphers", "CAST5"),
        ["cast5-ctr.txt"],
        lambda key, **kwargs: algorithms.CAST5(binascii.unhexlify((key))),
        lambda iv, **kwargs: modes.CTR(binascii.unhexlify(iv))
    )