| # 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 binascii |
| |
| import pytest |
| |
| from cryptography.exceptions import UnsupportedAlgorithm |
| from cryptography.hazmat.bindings.openssl.backend import backend, Backend |
| from cryptography.hazmat.primitives.block import BlockCipher |
| from cryptography.hazmat.primitives.block.ciphers import AES, TripleDES |
| from cryptography.hazmat.primitives.block.modes import CBC, ECB |
| |
| |
| class TestOpenSSL(object): |
| def test_backend_exists(self): |
| assert backend |
| |
| def test_openssl_version_text(self): |
| """ |
| This test checks the value of OPENSSL_VERSION_TEXT. |
| |
| Unfortunately, this define does not appear to have a |
| formal content definition, so for now we'll test to see |
| if it starts with OpenSSL as that appears to be true |
| for every OpenSSL. |
| """ |
| assert backend.openssl_version_text().startswith("OpenSSL") |
| |
| def test_supports_cipher(self): |
| assert backend.ciphers.supported(None, None) is False |
| |
| def test_register_duplicate_cipher_adapter(self): |
| with pytest.raises(ValueError): |
| backend.ciphers.register_cipher_adapter(AES, CBC, None) |
| |
| def test_nonexistent_cipher(self): |
| b = Backend() |
| # TODO: this test assumes that 3DES-ECB doesn't exist |
| b.ciphers.register_cipher_adapter( |
| TripleDES, ECB, lambda backend, cipher, mode: backend.ffi.NULL |
| ) |
| cipher = BlockCipher( |
| TripleDES(binascii.unhexlify(b"0" * 16)), ECB(), backend=b |
| ) |
| with pytest.raises(UnsupportedAlgorithm): |
| cipher.encryptor() |