52 lines
1.7 KiB
C++
52 lines
1.7 KiB
C++
/*
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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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