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/*
This file is part of cpp-ethereum.
cpp-ethereum is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
cpp-ethereum is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file UDP.cpp
* @author Alex Leverington <nessence@gmail.com>
* @date 2014
*/
#include "UDP.h"
using namespace dev;
using namespace dev::p2p;
h256 RLPXDatagramFace::sign(Secret const& _k)
{
RLPStream rlpstream;
streamRLP(rlpstream);
bytes rlpBytes(rlpstream.out());
bytesConstRef rlp(&rlpBytes);
h256 hash(dev::sha3(rlp));
Signature sig = dev::sign(_k, hash);
data.resize(h256::size + Signature::size + rlp.size());
bytesConstRef packetHash(&data[0], h256::size);
bytesConstRef signedPayload(&data[h256::size], Signature::size + rlp.size());
bytesConstRef payloadSig(&data[h256::size], Signature::size);
bytesConstRef payload(&data[h256::size + Signature::size], rlp.size());
sig.ref().copyTo(payloadSig);
rlp.copyTo(payload);
dev::sha3(signedPayload).ref().copyTo(packetHash);
return std::move(hash);
};
Public RLPXDatagramFace::authenticate(bytesConstRef _sig, bytesConstRef _rlp)
{
Signature const& sig = *(Signature const*)_sig.data();
return std::move(dev::recover(sig, sha3(_rlp)));
};