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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.
Foobar 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 Foobar. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file Common.cpp
* @author Gav Wood <i@gavwood.com>
* @date 2014
*/
#if WIN32
#pragma warning(push)
#pragma warning(disable:4244)
#else
#pragma GCC diagnostic ignored "-Wunused-function"
#endif
#include <secp256k1.h>
#include <sha3.h>
#if WIN32
#pragma warning(pop)
#else
#endif
#include <random>
#include "Common.h"
#include "Exceptions.h"
using namespace std;
using namespace eth;
std::string eth::escaped(std::string const& _s, bool _all)
{
std::string ret;
ret.reserve(_s.size());
ret.push_back('"');
for (auto i: _s)
if (i == '"' && !_all)
ret += "\\\"";
else if (i == '\\' && !_all)
ret += "\\\\";
else if (i < ' ' || i > 127 || _all)
{
ret += "\\x";
ret.push_back("0123456789abcdef"[(uint8_t)i / 16]);
ret.push_back("0123456789abcdef"[(uint8_t)i % 16]);
}
else
ret.push_back(i);
ret.push_back('"');
return ret;
}
std::string eth::randomWord()
{
static std::mt19937_64 s_eng(0);
std::string ret(std::uniform_int_distribution<int>(4, 10)(s_eng), ' ');
char const n[] = "qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM1234567890";
std::uniform_int_distribution<int> d(0, sizeof(n) - 2);
for (char& c: ret)
c = n[d(s_eng)];
return ret;
}
int eth::fromHex(char _i)
{
if (_i >= '0' && _i <= '9')
return _i - '0';
if (_i >= 'a' && _i <= 'f')
return _i - 'a' + 10;
if (_i >= 'A' && _i <= 'F')
return _i - 'A' + 10;
throw BadHexCharacter();
}
bytes eth::fromUserHex(std::string const& _s)
{
assert(_s.size() % 2 == 0);
if (_s.size() < 2)
return bytes();
uint s = (_s[0] == '0' && _s[1] == 'x') ? 2 : 0;
std::vector<uint8_t> ret;
ret.reserve((_s.size() - s) / 2);
for (uint i = s; i < _s.size(); i += 2)
ret.push_back((byte)(fromHex(_s[i]) * 16 + fromHex(_s[i + 1])));
return ret;
}
bytes eth::toHex(std::string const& _s)
{
std::vector<uint8_t> ret;
ret.reserve(_s.size() * 2);
for (auto i: _s)
{
ret.push_back(i / 16);
ret.push_back(i % 16);
}
return ret;
}
std::string eth::sha3(std::string const& _input, bool _hex)
{
if (!_hex)
{
string ret(32, '\0');
sha3(bytesConstRef((byte const*)_input.data(), _input.size()), bytesRef((byte*)ret.data(), 32));
return ret;
}
uint8_t buf[32];
sha3(bytesConstRef((byte const*)_input.data(), _input.size()), bytesRef((byte*)&(buf[0]), 32));
std::string ret(64, '\0');
for (unsigned int i = 0; i < 32; i++)
sprintf((char*)(ret.data())+i*2, "%02x", buf[i]);
return ret;
}
void eth::sha3(bytesConstRef _input, bytesRef _output)
{
CryptoPP::SHA3_256 ctx;
ctx.Update((byte*)_input.data(), _input.size());
assert(_output.size() >= 32);
ctx.Final(_output.data());
}
bytes eth::sha3Bytes(bytesConstRef _input)
{
bytes ret(32);
sha3(_input, &ret);
return ret;
}
h256 eth::sha3(bytesConstRef _input)
{
h256 ret;
sha3(_input, bytesRef(&ret[0], 32));
return ret;
}
Address eth::toAddress(Secret _private)
{
secp256k1_start();
byte pubkey[65];
int pubkeylen = 65;
int ok = secp256k1_ecdsa_seckey_verify(_private.data());
if (!ok)
return Address();
ok = secp256k1_ecdsa_pubkey_create(pubkey, &pubkeylen, _private.data(), 0);
assert(pubkeylen == 65);
if (!ok)
return Address();
ok = secp256k1_ecdsa_pubkey_verify(pubkey, 65);
if (!ok)
return Address();
auto ret = right160(eth::sha3(bytesConstRef(&(pubkey[1]), 64)));
#if ETH_ADDRESS_DEBUG
cout << "---- ADDRESS -------------------------------" << endl;
cout << "SEC: " << _private << endl;
cout << "PUB: " << asHex(bytesConstRef(&(pubkey[1]), 64)) << endl;
cout << "ADR: " << ret << endl;
#endif
return ret;
}