mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
106 lines
2.7 KiB
C++
106 lines
2.7 KiB
C++
/*
|
|
This file is part of solidity.
|
|
|
|
solidity 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.
|
|
|
|
solidity 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 solidity. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
/** @file CommonData.cpp
|
|
* @author Gav Wood <i@gavwood.com>
|
|
* @date 2014
|
|
*/
|
|
|
|
#include <libdevcore/CommonData.h>
|
|
#include <libdevcore/Exceptions.h>
|
|
#include <libdevcore/SHA3.h>
|
|
|
|
#include <boost/algorithm/string.hpp>
|
|
|
|
using namespace std;
|
|
using namespace dev;
|
|
|
|
int dev::fromHex(char _i, WhenError _throw)
|
|
{
|
|
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;
|
|
if (_throw == WhenError::Throw)
|
|
BOOST_THROW_EXCEPTION(BadHexCharacter() << errinfo_invalidSymbol(_i));
|
|
else
|
|
return -1;
|
|
}
|
|
|
|
bytes dev::fromHex(std::string const& _s, WhenError _throw)
|
|
{
|
|
unsigned s = (_s.size() >= 2 && _s[0] == '0' && _s[1] == 'x') ? 2 : 0;
|
|
std::vector<uint8_t> ret;
|
|
ret.reserve((_s.size() - s + 1) / 2);
|
|
|
|
if (_s.size() % 2)
|
|
{
|
|
int h = fromHex(_s[s++], WhenError::DontThrow);
|
|
if (h != -1)
|
|
ret.push_back(h);
|
|
else if (_throw == WhenError::Throw)
|
|
BOOST_THROW_EXCEPTION(BadHexCharacter());
|
|
else
|
|
return bytes();
|
|
}
|
|
for (unsigned i = s; i < _s.size(); i += 2)
|
|
{
|
|
int h = fromHex(_s[i], WhenError::DontThrow);
|
|
int l = fromHex(_s[i + 1], WhenError::DontThrow);
|
|
if (h != -1 && l != -1)
|
|
ret.push_back((byte)(h * 16 + l));
|
|
else if (_throw == WhenError::Throw)
|
|
BOOST_THROW_EXCEPTION(BadHexCharacter());
|
|
else
|
|
return bytes();
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
bool dev::passesAddressChecksum(string const& _str, bool _strict)
|
|
{
|
|
string s = _str.substr(0, 2) == "0x" ? _str.substr(2) : _str;
|
|
|
|
if (s.length() != 40)
|
|
return false;
|
|
|
|
if (!_strict && (
|
|
_str.find_first_of("abcdef") == string::npos ||
|
|
_str.find_first_of("ABCDEF") == string::npos
|
|
))
|
|
return true;
|
|
|
|
h256 hash = keccak256(boost::algorithm::to_lower_copy(s, std::locale::classic()));
|
|
for (size_t i = 0; i < 40; ++i)
|
|
{
|
|
char addressCharacter = s[i];
|
|
bool lowerCase;
|
|
if ('a' <= addressCharacter && addressCharacter <= 'f')
|
|
lowerCase = true;
|
|
else if ('A' <= addressCharacter && addressCharacter <= 'F')
|
|
lowerCase = false;
|
|
else
|
|
continue;
|
|
unsigned nibble = (unsigned(hash[i / 2]) >> (4 * (1 - (i % 2)))) & 0xf;
|
|
if ((nibble >= 8) == lowerCase)
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|