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59 lines
1.9 KiB
59 lines
1.9 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 UDP.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 "UDP.h"
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using namespace dev;
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using namespace dev::p2p;
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h256 RLPXDatagramFace::sign(Secret const& _k)
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{
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assert(packetType());
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RLPStream rlpxstream;
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// rlpxstream.appendRaw(toPublic(_k).asBytes()); // for mdc-based signature
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rlpxstream.appendRaw(bytes(1, packetType())); // prefix by 1 byte for type
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streamRLP(rlpxstream);
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bytes rlpxBytes(rlpxstream.out());
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bytesConstRef rlpx(&rlpxBytes);
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h256 sighash(dev::sha3(rlpx)); // H(type||data)
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Signature sig = dev::sign(_k, sighash); // S(H(type||data))
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data.resize(h256::size + Signature::size + rlpx.size());
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bytesRef rlpxHash(&data[0], h256::size);
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bytesRef rlpxSig(&data[h256::size], Signature::size);
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bytesRef rlpxPayload(&data[h256::size + Signature::size], rlpx.size());
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sig.ref().copyTo(rlpxSig);
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rlpx.copyTo(rlpxPayload);
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bytesConstRef signedRLPx(&data[h256::size], data.size() - h256::size);
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dev::sha3(signedRLPx).ref().copyTo(rlpxHash);
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return std::move(sighash);
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};
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Public RLPXDatagramFace::authenticate(bytesConstRef _sig, bytesConstRef _rlp)
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{
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Signature const& sig = *(Signature const*)_sig.data();
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return std::move(dev::recover(sig, sha3(_rlp)));
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};
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