| /* |
| * Copyright 2015 The Android Open Source Project |
| * |
| * 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 SYSTEM_KEYMASTER_ECIES_KEM_H_ |
| #define SYSTEM_KEYMASTER_ECIES_KEM_H_ |
| |
| #include "kem.h" |
| |
| #include <UniquePtr.h> |
| #include <openssl/ec.h> |
| |
| #include <keymaster/authorization_set.h> |
| |
| #include "hkdf.h" |
| #include "key_exchange.h" |
| |
| namespace keymaster { |
| |
| /** |
| * EciesKem is an implementation of the key encapsulation mechanism ECIES-KEM described in |
| * ISO 18033-2 (http://www.shoup.net/iso/std6.pdf, http://www.shoup.net/papers/iso-2_1.pdf). |
| */ |
| class EciesKem : public Kem { |
| public: |
| virtual ~EciesKem() override {} |
| EciesKem(const AuthorizationSet& kem_description, keymaster_error_t* error); |
| |
| /* Kem interface. */ |
| bool Encrypt(const Buffer& peer_public_value, Buffer* output_clear_key, |
| Buffer* output_encrypted_key) override; |
| bool Encrypt(const uint8_t* peer_public_value, size_t peer_public_value_len, |
| Buffer* output_clear_key, Buffer* output_encrypted_key) override; |
| |
| bool Decrypt(EC_KEY* private_key, const Buffer& encrypted_key, Buffer* output_key) override; |
| bool Decrypt(EC_KEY* private_key, const uint8_t* encrypted_key, size_t encrypted_key_len, |
| Buffer* output_key) override; |
| |
| private: |
| UniquePtr<KeyExchange> key_exchange_; |
| UniquePtr<Rfc5869Sha256Kdf> kdf_; |
| bool single_hash_mode_; |
| uint32_t key_bytes_to_generate_; |
| keymaster_ec_curve_t curve_; |
| }; |
| |
| } // namespace keymaster |
| |
| #endif // SYSTEM_KEYMASTER_ECIES_KEM_H_ |