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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 os
import pytest
from cryptography.hazmat.backends.interfaces import HMACBackend
from cryptography.hazmat.primitives import hashes
from .utils import generate_hkdf_test
from ...utils import load_nist_vectors
@pytest.mark.supported(
only_if=lambda backend: backend.hmac_supported(hashes.SHA1()),
skip_message="Does not support SHA1."
)
@pytest.mark.requires_backend_interface(interface=HMACBackend)
class TestHKDFSHA1(object):
test_HKDFSHA1 = generate_hkdf_test(
load_nist_vectors,
os.path.join("KDF"),
["rfc-5869-HKDF-SHA1.txt"],
hashes.SHA1()
)
@pytest.mark.supported(
only_if=lambda backend: backend.hmac_supported(hashes.SHA256()),
skip_message="Does not support SHA256."
)
@pytest.mark.requires_backend_interface(interface=HMACBackend)
class TestHKDFSHA256(object):
test_HKDFSHA1 = generate_hkdf_test(
load_nist_vectors,
os.path.join("KDF"),
["rfc-5869-HKDF-SHA256.txt"],
hashes.SHA256()
)
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