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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 pretend
import pytest
import six
from cryptography.hazmat.bindings import _default_backend
from cryptography.hazmat.primitives import hashes
from .utils import generate_base_hash_test
class TestHashContext(object):
def test_hash_reject_unicode(self, backend):
m = hashes.Hash(hashes.SHA1(), backend=backend)
with pytest.raises(TypeError):
m.update(six.u("\u00FC"))
def test_copy_backend_object(self):
pretend_hashes = pretend.stub(copy_ctx=lambda a: "copiedctx")
pretend_backend = pretend.stub(hashes=pretend_hashes)
pretend_ctx = pretend.stub()
h = hashes.Hash(hashes.SHA1(), backend=pretend_backend,
ctx=pretend_ctx)
assert h._backend is pretend_backend
assert h.copy()._backend is h._backend
def test_default_backend_creation(self):
"""
This test assumes the presence of SHA1 in the default backend.
"""
h = hashes.Hash(hashes.SHA1())
assert h._backend is _default_backend
def test_hash_algorithm_instance(self):
with pytest.raises(TypeError):
hashes.Hash(hashes.SHA1)
class TestSHA1(object):
test_SHA1 = generate_base_hash_test(
hashes.SHA1(),
digest_size=20,
block_size=64,
only_if=lambda backend: backend.hashes.supported(hashes.SHA1),
skip_message="Does not support SHA1",
)
class TestSHA224(object):
test_SHA224 = generate_base_hash_test(
hashes.SHA224(),
digest_size=28,
block_size=64,
only_if=lambda backend: backend.hashes.supported(hashes.SHA224),
skip_message="Does not support SHA224",
)
class TestSHA256(object):
test_SHA256 = generate_base_hash_test(
hashes.SHA256(),
digest_size=32,
block_size=64,
only_if=lambda backend: backend.hashes.supported(hashes.SHA256),
skip_message="Does not support SHA256",
)
class TestSHA384(object):
test_SHA384 = generate_base_hash_test(
hashes.SHA384(),
digest_size=48,
block_size=128,
only_if=lambda backend: backend.hashes.supported(hashes.SHA384),
skip_message="Does not support SHA384",
)
class TestSHA512(object):
test_SHA512 = generate_base_hash_test(
hashes.SHA512(),
digest_size=64,
block_size=128,
only_if=lambda backend: backend.hashes.supported(hashes.SHA512),
skip_message="Does not support SHA512",
)
class TestRIPEMD160(object):
test_RIPEMD160 = generate_base_hash_test(
hashes.RIPEMD160(),
digest_size=20,
block_size=64,
only_if=lambda backend: backend.hashes.supported(hashes.RIPEMD160),
skip_message="Does not support RIPEMD160",
)
class TestWhirlpool(object):
test_Whirlpool = generate_base_hash_test(
hashes.Whirlpool(),
digest_size=64,
block_size=64,
only_if=lambda backend: backend.hashes.supported(hashes.Whirlpool),
skip_message="Does not support Whirlpool",
)
class TestMD5(object):
test_MD5 = generate_base_hash_test(
hashes.MD5(),
digest_size=16,
block_size=64,
only_if=lambda backend: backend.hashes.supported(hashes.MD5),
skip_message="Does not support MD5",
)
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