| /* |
| * 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_KEY_EXCHANGE_H_ |
| #define SYSTEM_KEYMASTER_KEY_EXCHANGE_H_ |
| |
| #include <openssl/ec.h> |
| |
| #include <keymaster/serializable.h> |
| |
| namespace keymaster { |
| |
| /** |
| * KeyExchange is an abstract class that provides an interface to a |
| * key-exchange primitive. |
| */ |
| class KeyExchange { |
| public: |
| virtual ~KeyExchange() {} |
| |
| /** |
| * CalculateSharedKey computes the shared key between the local private key |
| * (which is implicitly known by a KeyExchange object) and a public value |
| * from the peer. |
| */ |
| virtual bool CalculateSharedKey(const Buffer& peer_public_value, Buffer* shared_key) const = 0; |
| virtual bool CalculateSharedKey(const uint8_t* peer_public_value, size_t peer_public_value_len, |
| Buffer* shared_key) const = 0; |
| |
| /** |
| * public_value writes to |public_value| the local public key which can be |
| * sent to a peer in order to complete a key exchange. |
| */ |
| virtual bool public_value(Buffer* public_value) const = 0; |
| }; |
| |
| } // namespace keymaster |
| |
| #endif // SYSTEM_KEYMASTER_KEY_EXCHANGE_H_ |