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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/>.
*/
/** @file SecretStore.h
* @author Gav Wood <i@gavwood.com>
* @date 2014
*/
#pragma once
#include <functional>
#include <mutex>
#include <libdevcore/FixedHash.h>
#include <libdevcore/FileSystem.h>
#include "Common.h"
namespace dev
{
enum class KDF {
PBKDF2_SHA256,
Scrypt,
};
class SecretStore
{
public:
SecretStore(std::string const& _path = defaultPath());
~SecretStore();
bytes secret(h128 const& _uuid, std::function<std::string()> const& _pass, bool _useCache = true) const;
h128 importKey(std::string const& _file) { auto ret = readKey(_file, false); if (ret) save(); return ret; }
h128 importKeyContent(std::string const& _content) { auto ret = readKeyContent(_content, std::string()); if (ret) save(); return ret; }
h128 importSecret(bytes const& _s, std::string const& _pass);
bool recode(h128 const& _uuid, std::string const& _newPass, std::function<std::string()> const& _pass, KDF _kdf = KDF::Scrypt);
void kill(h128 const& _uuid);
std::vector<h128> keys() const { return keysOf(m_keys); }
// Clear any cached keys.
void clearCache() const;
// Doesn't save().
h128 readKey(std::string const& _file, bool _deleteFile);
h128 readKeyContent(std::string const& _content, std::string const& _file = std::string());
void save(std::string const& _keysPath);
void save() { save(m_path); }
static std::string defaultPath() { return getDataDir("web3") + "/keys"; }
private:
void load(std::string const& _keysPath);
void load() { load(m_path); }
static std::string encrypt(bytes const& _v, std::string const& _pass, KDF _kdf = KDF::Scrypt);
static bytes decrypt(std::string const& _v, std::string const& _pass);
mutable std::unordered_map<h128, bytes> m_cached;
std::unordered_map<h128, std::pair<std::string, std::string>> m_keys;
std::string m_path;
};
}