| # Copyright 2019 Google LLC. |
| # |
| # 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. |
| |
| """Python wrapper of the CLIF-wrapped C++ Deterministic AEAD key manager.""" |
| |
| from __future__ import absolute_import |
| from __future__ import division |
| # Placeholder for import for type annotations |
| from __future__ import print_function |
| |
| from tink import core |
| from tink.cc.pybind import tink_bindings |
| from tink.daead import _deterministic_aead |
| from tink.daead import _deterministic_aead_wrapper |
| |
| |
| class _DeterministicAeadCcToPyWrapper(_deterministic_aead.DeterministicAead): |
| """Transforms cliffed C++ DeterministicAead into a Python primitive.""" |
| |
| def __init__(self, cc_deterministic_aead): |
| self._deterministic_aead = cc_deterministic_aead |
| |
| @core.use_tink_errors |
| def encrypt_deterministically(self, plaintext: bytes, |
| associated_data: bytes) -> bytes: |
| return self._deterministic_aead.encrypt_deterministically( |
| plaintext, associated_data) |
| |
| @core.use_tink_errors |
| def decrypt_deterministically(self, ciphertext: bytes, |
| associated_data: bytes) -> bytes: |
| return self._deterministic_aead.decrypt_deterministically( |
| ciphertext, associated_data) |
| |
| |
| def register(): |
| """Registers all Hybrid key managers and wrapper in the Python Registry.""" |
| tink_bindings.register() |
| |
| type_url = 'type.googleapis.com/google.crypto.tink.AesSivKey' |
| key_manager = core.KeyManagerCcToPyWrapper( |
| tink_bindings.DeterministicAeadKeyManager.from_cc_registry(type_url), |
| _deterministic_aead.DeterministicAead, _DeterministicAeadCcToPyWrapper) |
| core.Registry.register_key_manager(key_manager, new_key_allowed=True) |
| core.Registry.register_primitive_wrapper( |
| _deterministic_aead_wrapper.DeterministicAeadWrapper()) |
| |
| |