SecretMgr.h

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/*
 * This file is part of the TrinityCore Project. See AUTHORS file for Copyright information
 *
 * This program 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 2 of the License, or (at your
 * option) any later version.
 *
 * This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef __TRINITY_SECRETMGR_H__
#define __TRINITY_SECRETMGR_H__
 
#include "BigNumber.h"
#include "Common.h"
#include "LogCommon.h"
#include "Optional.h"
#include <array>
#include <mutex>
#include <string>
 
enum Secrets : uint32
{
 SECRET_TOTP_MASTER_KEY = 0,
 
 // only add new indices right above this line
 NUM_SECRETS
};
 
enum SecretOwner
{
 SECRET_OWNER_BNETSERVER,
 SECRET_OWNER_WORLDSERVER,
 
 NUM_SECRET_OWNERS
};
 
class TC_SHARED_API SecretMgr
{
 private:
 SecretMgr() {}
 ~SecretMgr() {}
 
 public:
 static SecretOwner OWNER;
 
 SecretMgr(SecretMgr const&) = delete;
 static SecretMgr* instance();
 
 struct Secret
 {
 public:
 explicit operator bool() const { return (state == PRESENT); }
 BigNumber const& operator*() const { return value; }
 BigNumber const* operator->() const { return &value; }
 bool IsAvailable() const { return (state != NOT_LOADED_YET) && (state != LOAD_FAILED); }
 
 private:
 std::mutex lock;
 enum { NOT_LOADED_YET, LOAD_FAILED, NOT_PRESENT, PRESENT } state = NOT_LOADED_YET;
 BigNumber value;
 
 friend class SecretMgr;
 };
 
 void Initialize(SecretOwner owner);
 Secret const& GetSecret(Secrets i);
 
 private:
 void AttemptLoad(Secrets i, LogLevel errorLevel, std::unique_lock<std::mutex> const&);
 Optional<std::string> AttemptTransition(Secrets i, Optional<BigNumber> const& newSecret, Optional<BigNumber> const& oldSecret, bool hadOldSecret) const;
 
 std::array<Secret, NUM_SECRETS> _secrets;
};
 
#define sSecretMgr SecretMgr::instance()
 
#endif