/*
 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 CryptoPP.cpp
 * @author Alex Leverington <nessence@gmail.com>
 * @date 2014
 */

#include "CryptoPP.h"

using namespace dev;
using namespace dev::crypto;
using namespace CryptoPP;


/// Integer and Point Conversion:

void pp::exportPublicKey(CryptoPP::DL_PublicKey_EC<CryptoPP::ECP> const& _k, Public& _p)
{
	bytes prefixedKey(_k.GetGroupParameters().GetEncodedElementSize(true));
	secp256k1Params.GetCurve().EncodePoint(prefixedKey.data(), _k.GetPublicElement(), false);

	assert(Public::size + 1 == _k.GetGroupParameters().GetEncodedElementSize(true));
	memcpy(_p.data(), &prefixedKey[1], Public::size);
}

void pp::exponentToPublic(Integer const& _e, Public& _p)
{
	CryptoPP::DL_PublicKey_EC<CryptoPP::ECP> pk;
	pk.Initialize(secp256k1Params, secp256k1Params.ExponentiateBase(_e));
	pp::exportPublicKey(pk, _p);
}