| // Copyright 2021 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. |
| // |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| #ifndef TINK_EXPERIMENTAL_PQCRYPTO_KEM_CECPQ2_AEAD_HKDF_DEM_HELPER_H_ |
| #define TINK_EXPERIMENTAL_PQCRYPTO_KEM_CECPQ2_AEAD_HKDF_DEM_HELPER_H_ |
| |
| #include <memory> |
| |
| #include "tink/aead.h" |
| #include "tink/daead/subtle/aead_or_daead.h" |
| #include "tink/util/protobuf_helper.h" |
| #include "tink/util/secret_data.h" |
| #include "tink/util/statusor.h" |
| #include "proto/tink.pb.h" |
| |
| namespace crypto { |
| namespace tink { |
| |
| // A helper for DEM (data encapsulation mechanism) of CECPQ2-AEAD-HKDF. |
| class Cecpq2AeadHkdfDemHelper { |
| public: |
| // Constructs a new helper for the specified DEM key template. |
| static crypto::tink::util::StatusOr< |
| std::unique_ptr<const Cecpq2AeadHkdfDemHelper>> |
| New(const google::crypto::tink::KeyTemplate& dem_key_template); |
| |
| virtual ~Cecpq2AeadHkdfDemHelper() {} |
| |
| // Creates and returns a new AeadOrDaead object that uses |
| // a 32-bytes or greater high-entropy seed to generate a key. |
| virtual crypto::tink::util::StatusOr< |
| std::unique_ptr<crypto::tink::subtle::AeadOrDaead>> |
| GetAeadOrDaead(const util::SecretData& seed) const = 0; |
| |
| // Return the key material size. |
| virtual crypto::tink::util::StatusOr<uint32_t> GetKeyMaterialSize() const = 0; |
| }; |
| |
| } // namespace tink |
| } // namespace crypto |
| |
| #endif // TINK_EXPERIMENTAL_PQCRYPTO_KEM_CECPQ2_AEAD_HKDF_DEM_HELPER_H_ |