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46 lines
1.3 KiB
46 lines
1.3 KiB
/*
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This file is part of cpp-ethereum.
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cpp-ethereum is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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cpp-ethereum is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file ECDHE.cpp
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* @author Alex Leverington <nessence@gmail.com>
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* @date 2014
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*/
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#include "ECDHE.h"
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#include <libdevcore/SHA3.h>
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#include "CryptoPP.h"
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using namespace std;
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using namespace dev;
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using namespace dev::crypto;
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static Secp256k1PP s_secp256k1;
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void dev::crypto::ecdh::agree(Secret const& _s, Public const& _r, Secret& o_s)
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{
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s_secp256k1.agree(_s, _r, o_s);
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}
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void ECDHE::agree(Public const& _remote, Secret& o_sharedSecret) const
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{
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if (m_remoteEphemeral)
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// agreement can only occur once
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BOOST_THROW_EXCEPTION(InvalidState());
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m_remoteEphemeral = _remote;
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s_secp256k1.agree(m_ephemeral.sec(), m_remoteEphemeral, o_sharedSecret);
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}
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