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52 lines
1.7 KiB
52 lines
1.7 KiB
/* |
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* Copyright 2015 The Android Open Source Project |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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#ifndef SYSTEM_KEYMASTER_KEY_EXCHANGE_H_ |
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#define SYSTEM_KEYMASTER_KEY_EXCHANGE_H_ |
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#include <openssl/ec.h> |
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#include <keymaster/serializable.h> |
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namespace keymaster { |
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/** |
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* KeyExchange is an abstract class that provides an interface to a |
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* key-exchange primitive. |
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*/ |
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class KeyExchange { |
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public: |
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virtual ~KeyExchange() {} |
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/** |
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* CalculateSharedKey computes the shared key between the local private key |
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* (which is implicitly known by a KeyExchange object) and a public value |
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* from the peer. |
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*/ |
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virtual bool CalculateSharedKey(const Buffer& peer_public_value, Buffer* shared_key) const = 0; |
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virtual bool CalculateSharedKey(const uint8_t* peer_public_value, size_t peer_public_value_len, |
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Buffer* shared_key) const = 0; |
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/** |
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* public_value writes to |public_value| the local public key which can be |
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* sent to a peer in order to complete a key exchange. |
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*/ |
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virtual bool public_value(Buffer* public_value) const = 0; |
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}; |
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} // namespace keymaster |
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#endif // SYSTEM_KEYMASTER_KEY_EXCHANGE_H_
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