SHA3.cpp

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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/>.
*/

#include "SHA3.h"
#include "RLP.h"

#include <ethash/keccak.hpp>

namespace dev
{
h256 const EmptySHA3 = sha3(bytesConstRef());
h256 const EmptyListSHA3 = sha3(rlpList());

bool sha3(bytesConstRef _input, bytesRef o_output) noexcept
{
    if (o_output.size() != 32)
        return false;
    ethash::hash256 h = ethash::keccak256(_input.data(), _input.size());
    bytesConstRef{h.bytes, 32}.copyTo(o_output);
    return true;
}
}  // namespace dev