| // Copyright 2019 Google Inc. |
| // |
| // 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. |
| // |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| #include "tink/deterministic_aead.h" |
| |
| #include "pybind11/pybind11.h" |
| #include "tink/util/statusor.h" |
| #include "tink/cc/pybind/status_casters.h" |
| |
| namespace crypto { |
| namespace tink { |
| |
| void PybindRegisterDeterministicAead(pybind11::module* module) { |
| namespace py = pybind11; |
| py::module& m = *module; |
| |
| // TODO(b/146492561): Reduce the number of complicated lambdas. |
| py::class_<DeterministicAead>( |
| m, "DeterministicAead", |
| "Interface for Deterministic Authenticated Encryption with Associated " |
| "Data (Deterministic AEAD)\n", |
| "For why this interface is desirable and some of its use cases, see for ", |
| "example https://tools.ietf.org/html/rfc5297#section-1.3.\n", "Warning! ", |
| "Unlike Aead, implementations of this interface are not semantically ", |
| "secure, because encrypting the same plaintex always yields the same ", |
| "ciphertext.\n", "Security guarantees\n", |
| "Implementations of this interface provide 128-bit security level " |
| "against ", |
| "multi-user attacks with up to 2^32 keys. That means if an adversary ", |
| "obtains 2^32 ciphertexts of the same message encrypted under 2^32 " |
| "keys, ", |
| "they need to do 2^128 computations to obtain a single key.\n", |
| "Encryption with associated data ensures authenticity (who the sender " |
| "is) ", |
| "and integrity (the data has not been tampered with) of that data, but " |
| "not ", |
| "its secrecy. (see https://tools.ietf.org/html/rfc5116)") |
| |
| .def( |
| "encrypt_deterministically", |
| [](const DeterministicAead& self, const py::bytes& plaintext, |
| const py::bytes& associated_data) -> util::StatusOr<py::bytes> { |
| // TODO(b/145925674) |
| return self.EncryptDeterministically(std::string(plaintext), |
| std::string(associated_data)); |
| }, |
| py::arg("plaintext"), py::arg("associated_data")) |
| .def( |
| "decrypt_deterministically", |
| [](const DeterministicAead& self, const py::bytes& ciphertext, |
| const py::bytes& associated_data) -> util::StatusOr<py::bytes> { |
| // TODO(b/145925674) |
| return self.DecryptDeterministically(std::string(ciphertext), |
| std::string(associated_data)); |
| }, |
| py::arg("ciphertext"), py::arg("associated_data")); |
| } |
| |
| } // namespace tink |
| } // namespace crypto |