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# This file is dual licensed under the terms of the Apache License, Version
# 2.0, and the BSD License. See the LICENSE file in the root of this repository
# for complete details.

from __future__ import absolute_import, division, print_function

import os

import pytest

from cryptography.hazmat.backends.interfaces import HMACBackend

from .utils import generate_kbkdf_counter_mode_test
from ...utils import load_nist_kbkdf_vectors


@pytest.mark.requires_backend_interface(interface=HMACBackend)
class TestCounterKDFCounterMode(object):
    test_kbkdfctr = generate_kbkdf_counter_mode_test(
        load_nist_kbkdf_vectors,
        os.path.join("KDF"),
        ["nist-800-108-KBKDF-CTR.txt"]
    )