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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 pytest
from cryptography.hazmat.bindings.openssl.binding import Binding
class TestOpenSSL(object):
def test_binding_loads(self):
binding = Binding()
assert binding
assert binding.lib
assert binding.ffi
def test_is_available(self):
assert Binding.is_available() is True
def test_crypto_lock_init(self):
b = Binding()
b.init_static_locks()
lock_cb = b.lib.CRYPTO_get_locking_callback()
assert lock_cb != b.ffi.NULL
def _skip_if_not_fallback_lock(self, b):
# only run this test if we are using our locking cb
original_cb = b.lib.CRYPTO_get_locking_callback()
if original_cb != b._lock_cb_handle:
pytest.skip(
"Not using the fallback Python locking callback "
"implementation. Probably because import _ssl set one"
)
def test_fallback_crypto_lock_via_openssl_api(self):
b = Binding()
b.init_static_locks()
self._skip_if_not_fallback_lock(b)
# check that the lock state changes appropriately
lock = b._locks[b.lib.CRYPTO_LOCK_SSL]
# starts out unlocked
assert lock.acquire(False)
lock.release()
b.lib.CRYPTO_lock(
b.lib.CRYPTO_LOCK | b.lib.CRYPTO_READ,
b.lib.CRYPTO_LOCK_SSL, b.ffi.NULL, 0
)
# becomes locked
assert not lock.acquire(False)
b.lib.CRYPTO_lock(
b.lib.CRYPTO_UNLOCK | b.lib.CRYPTO_READ,
b.lib.CRYPTO_LOCK_SSL, b.ffi.NULL, 0
)
# then unlocked
assert lock.acquire(False)
lock.release()
def test_fallback_crypto_lock_via_binding_api(self):
b = Binding()
b.init_static_locks()
self._skip_if_not_fallback_lock(b)
lock = b._locks[b.lib.CRYPTO_LOCK_SSL]
with pytest.raises(RuntimeError):
b._lock_cb(0, b.lib.CRYPTO_LOCK_SSL, "<test>", 1)
# errors shouldnt cause locking
assert lock.acquire(False)
lock.release()
b._lock_cb(b.lib.CRYPTO_LOCK | b.lib.CRYPTO_READ,
b.lib.CRYPTO_LOCK_SSL, "<test>", 1)
# locked
assert not lock.acquire(False)
b._lock_cb(b.lib.CRYPTO_UNLOCK | b.lib.CRYPTO_READ,
b.lib.CRYPTO_LOCK_SSL, "<test>", 1)
# unlocked
assert lock.acquire(False)
lock.release()
def test_add_engine_more_than_once(self):
b = Binding()
res = b.lib.Cryptography_add_osrandom_engine()
assert res == 2
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