| // 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_SUBTLE_CECPQ2_AEAD_HKDF_HYBRID_DECRYPT_H_ |
| #define TINK_EXPERIMENTAL_PQCRYPTO_KEM_SUBTLE_CECPQ2_AEAD_HKDF_HYBRID_DECRYPT_H_ |
| |
| #include <memory> |
| #include <string> |
| #include <utility> |
| |
| #include "tink/experimental/pqcrypto/kem/cecpq2_aead_hkdf_dem_helper.h" |
| #include "tink/experimental/pqcrypto/kem/subtle/cecpq2_hkdf_recipient_kem_boringssl.h" |
| #include "tink/experimental/pqcrypto/kem/subtle/cecpq2_subtle_boringssl_util.h" |
| #include "tink/hybrid_decrypt.h" |
| #include "tink/util/statusor.h" |
| #include "proto/experimental/pqcrypto/cecpq2_aead_hkdf.pb.h" |
| |
| namespace crypto { |
| namespace tink { |
| |
| // CECPQ2 decryption with HKDF-KEM (key encapsulation mechanism) and |
| // AEAD-DEM (data encapsulation mechanism) |
| class Cecpq2AeadHkdfHybridDecrypt : public HybridDecrypt { |
| public: |
| // Returns an HybridDecrypt-primitive that uses the key material |
| // given in 'recipient_key' |
| static crypto::tink::util::StatusOr<std::unique_ptr<HybridDecrypt>> New( |
| const google::crypto::tink::Cecpq2AeadHkdfPrivateKey& private_key); |
| |
| crypto::tink::util::StatusOr<std::string> Decrypt( |
| absl::string_view ciphertext, |
| absl::string_view context_info) const override; |
| |
| private: |
| Cecpq2AeadHkdfHybridDecrypt( |
| const google::crypto::tink::Cecpq2AeadHkdfParams& recipient_key_params, |
| std::unique_ptr<const subtle::Cecpq2HkdfRecipientKemBoringSsl> kem, |
| std::unique_ptr<const Cecpq2AeadHkdfDemHelper> dem_helper) |
| : recipient_key_params_(recipient_key_params), |
| recipient_kem_(std::move(kem)), |
| dem_helper_(std::move(dem_helper)) {} |
| |
| google::crypto::tink::Cecpq2AeadHkdfParams recipient_key_params_; |
| std::unique_ptr<const subtle::Cecpq2HkdfRecipientKemBoringSsl> recipient_kem_; |
| std::unique_ptr<const Cecpq2AeadHkdfDemHelper> dem_helper_; |
| }; |
| |
| } // namespace tink |
| } // namespace crypto |
| |
| #endif // TINK_EXPERIMENTAL_PQCRYPTO_KEM_SUBTLE_CECPQ2_AEAD_HKDF_HYBRID_DECRYPT_H_ |