| // 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_SIGNATURE_SUBTLE_DILITHIUM_KEY_H_ |
| #define TINK_EXPERIMENTAL_PQCRYPTO_SIGNATURE_SUBTLE_DILITHIUM_KEY_H_ |
| |
| #include <memory> |
| #include <string> |
| #include <string_view> |
| #include <utility> |
| |
| #include "tink/util/secret_data.h" |
| #include "tink/util/statusor.h" |
| |
| namespace crypto { |
| namespace tink { |
| namespace subtle { |
| |
| enum class DilithiumSeedExpansion { |
| SEED_EXPANSION_UNKNOWN = 0, |
| SEED_EXPANSION_SHAKE = 1, |
| SEED_EXPANSION_AES = 2, |
| }; |
| |
| // Dilithium public key representation. |
| class DilithiumPublicKeyPqclean { |
| public: |
| // Creates a new DilithiumPublicKeyPqclean from key_data. Should only be |
| // called with the result of a previous call to GetKeyData(). |
| static util::StatusOr<DilithiumPublicKeyPqclean> NewPublicKey( |
| absl::string_view key_data, DilithiumSeedExpansion seed_expansion); |
| |
| DilithiumPublicKeyPqclean(const DilithiumPublicKeyPqclean& other) = default; |
| DilithiumPublicKeyPqclean& operator=(const DilithiumPublicKeyPqclean& other) = |
| default; |
| |
| const std::string& GetKeyData() const; |
| const DilithiumSeedExpansion& GetSeedExpansion() const; |
| |
| private: |
| DilithiumPublicKeyPqclean(absl::string_view key_data, |
| DilithiumSeedExpansion seed_expansion) |
| : key_data_(key_data), seed_expansion_(seed_expansion) {} |
| |
| const std::string key_data_; |
| const DilithiumSeedExpansion seed_expansion_; |
| }; |
| |
| // Dilithium private key representation. |
| class DilithiumPrivateKeyPqclean { |
| public: |
| // Creates a new DilithiumPrivateKeyPqclean from key_data. Should only be |
| // called with the result of a previous call to GetKeyData(). |
| static util::StatusOr<DilithiumPrivateKeyPqclean> NewPrivateKey( |
| util::SecretData key_data, DilithiumSeedExpansion seed_expansion); |
| |
| DilithiumPrivateKeyPqclean(const DilithiumPrivateKeyPqclean& other) = default; |
| DilithiumPrivateKeyPqclean& operator=( |
| const DilithiumPrivateKeyPqclean& other) = default; |
| |
| // Generates a new dilithium key pair (different key sizes based on version). |
| // Possible values for the private key size are: |
| // 2528 - Dilithium2 |
| // 4000 - Dilithium3 |
| // 4864 - Dilithium5 |
| static util::StatusOr< |
| std::pair<DilithiumPrivateKeyPqclean, DilithiumPublicKeyPqclean>> |
| GenerateKeyPair(int32_t key_size, DilithiumSeedExpansion seed_expansion); |
| |
| const util::SecretData& GetKeyData() const; |
| const DilithiumSeedExpansion& GetSeedExpansion() const; |
| |
| private: |
| DilithiumPrivateKeyPqclean(util::SecretData key_data, |
| DilithiumSeedExpansion seed_expansion) |
| : key_data_(std::move(key_data)), seed_expansion_(seed_expansion) {} |
| |
| const util::SecretData key_data_; |
| const DilithiumSeedExpansion seed_expansion_; |
| }; |
| |
| } // namespace subtle |
| } // namespace tink |
| } // namespace crypto |
| |
| #endif // TINK_EXPERIMENTAL_PQCRYPTO_SIGNATURE_SUBTLE_DILITHIUM_KEY_H_ |