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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.
import pytest
from cryptography.hazmat.oath.hotp import HOTP
from tests.utils import load_vectors_from_file, load_nist_vectors
vectors = load_vectors_from_file(
"oath/rfc-4226.txt", load_nist_vectors)
@pytest.mark.oath
class TestHOTP(object):
@pytest.mark.parametrize("params", vectors)
def test_truncate(self, backend, params):
secret = params["secret"]
counter = int(params["counter"])
truncated = params["truncated"]
hotp = HOTP(secret, 6, backend)
assert hex(hotp._dynamic_truncate(counter))[2:] == truncated.decode()
@pytest.mark.parametrize("params", vectors)
def test_generate(self, backend, params):
secret = params["secret"]
counter = int(params["counter"])
hotp_value = params["hotp"]
hotp = HOTP(secret, 6, backend)
assert hotp.generate(counter) == hotp_value
@pytest.mark.parametrize("params", vectors)
def test_verify(self, backend, params):
secret = params["secret"]
counter = int(params["counter"])
hotp_value = params["hotp"]
hotp = HOTP(secret, 6, backend)
assert hotp.verify(hotp_value, counter) is True
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