/* random.hpp * * Copyright (C) 2003 Sawtooth Consulting Ltd. * * This file is part of yaSSL. * * yaSSL 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. * * yaSSL 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, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA */ /* random.hpp provides a crypto secure Random Number Generator using an OS specific seed */ #ifndef TAO_CRYPT_RANDOM_HPP #define TAO_CRYPT_RANDOM_HPP #include "arc4.hpp" #include "error.hpp" namespace TaoCrypt { // OS specific seeder class OS_Seed { public: OS_Seed(); ~OS_Seed(); void GenerateSeed(byte*, word32 sz); Error GetError() const { return error_; } private: #if defined(WIN32) #if defined(_WIN64) typedef unsigned __int64 ProviderHandle; // type HCRYPTPROV, avoid #include <windows.h> #else typedef unsigned long ProviderHandle; #endif ProviderHandle handle_; #else int fd_; #endif Error error_; OS_Seed(const OS_Seed&); // hide copy OS_Seed& operator=(const OS_Seed&); // hide assign }; // secure Random Nnumber Generator class RandomNumberGenerator { public: RandomNumberGenerator(); ~RandomNumberGenerator() {} void GenerateBlock(byte*, word32 sz); byte GenerateByte(); ErrorNumber GetError() const { return seed_.GetError().What(); } private: OS_Seed seed_; ARC4 cipher_; RandomNumberGenerator(const RandomNumberGenerator&); // hide copy RandomNumberGenerator operator=(const RandomNumberGenerator&); // && assign }; } // namespace #endif // TAO_CRYPT_RANDOM_HPP