| # 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. |
| """Cross-language tests for the StreamingAead primitive.""" |
| |
| import io |
| |
| from absl.testing import absltest |
| from absl.testing import parameterized |
| |
| import tink |
| from tink import streaming_aead |
| |
| from util import supported_key_types |
| from util import testing_servers |
| |
| SUPPORTED_LANGUAGES = (testing_servers |
| .SUPPORTED_LANGUAGES_BY_PRIMITIVE['streaming_aead']) |
| |
| |
| def setUpModule(): |
| streaming_aead.register() |
| testing_servers.start() |
| |
| |
| def tearDownModule(): |
| testing_servers.stop() |
| |
| |
| class StreamingAeadPythonTest(parameterized.TestCase): |
| |
| @parameterized.parameters( |
| supported_key_types.test_cases( |
| supported_key_types.STREAMING_AEAD_KEY_TYPES)) |
| def test_encrypt_decrypt(self, key_template_name, supported_langs): |
| self.assertNotEmpty(supported_langs) |
| key_template = supported_key_types.KEY_TEMPLATE[key_template_name] |
| # Take the first supported language to generate the keyset. |
| keyset = testing_servers.new_keyset(supported_langs[0], key_template) |
| supported_streaming_aeads = [ |
| testing_servers.streaming_aead(lang, keyset) for lang in supported_langs |
| ] |
| unsupported_streaming_aeads = [ |
| testing_servers.streaming_aead(lang, keyset) |
| for lang in SUPPORTED_LANGUAGES |
| if lang not in supported_langs |
| ] |
| for p in supported_streaming_aeads: |
| plaintext = ( |
| b'This is some plaintext message to be encrypted using key_template ' |
| b'%s using %s for encryption.' |
| % (key_template_name.encode('utf8'), p.lang.encode('utf8'))) |
| associated_data = ( |
| b'Some associated data for %s using %s for encryption.' % |
| (key_template_name.encode('utf8'), p.lang.encode('utf8'))) |
| plaintext_stream = io.BytesIO(plaintext) |
| ciphertext_result_stream = p.new_encrypting_stream( |
| plaintext_stream, associated_data) |
| ciphertext = ciphertext_result_stream.read() |
| for p2 in supported_streaming_aeads: |
| ciphertext_stream = io.BytesIO(ciphertext) |
| decrypted_stream = p2.new_decrypting_stream( |
| ciphertext_stream, associated_data) |
| self.assertEqual(decrypted_stream.read(), plaintext) |
| for p2 in unsupported_streaming_aeads: |
| with self.assertRaises(tink.TinkError): |
| ciphertext_stream = io.BytesIO(ciphertext) |
| decrypted_stream = p2.new_decrypting_stream( |
| ciphertext_stream, associated_data) |
| for p in unsupported_streaming_aeads: |
| with self.assertRaises(tink.TinkError): |
| plaintext_stream = io.BytesIO(b'plaintext') |
| ciphertext_result_stream = p.new_encrypting_stream( |
| plaintext_stream, b'associated_data') |
| |
| if __name__ == '__main__': |
| absltest.main() |