/* * Global PRNG * (C) 2008-2010 Jack Lloyd * * Distributed under the terms of the Botan license */ #include #if defined(BOTAN_HAS_ENTROPY_SRC_HIGH_RESOLUTION_TIMER) #include #endif #if defined(BOTAN_HAS_ENTROPY_SRC_RDRAND) #include #endif #if defined(BOTAN_HAS_ENTROPY_SRC_DEV_RANDOM) #include #endif #if defined(BOTAN_HAS_ENTROPY_SRC_EGD) #include #endif #if defined(BOTAN_HAS_ENTROPY_SRC_UNIX_PROCESS_RUNNER) #include #endif #if defined(BOTAN_HAS_ENTROPY_SRC_BEOS) #include #endif #if defined(BOTAN_HAS_ENTROPY_SRC_CAPI) #include #endif #if defined(BOTAN_HAS_ENTROPY_SRC_WIN32) #include #endif #if defined(BOTAN_HAS_ENTROPY_SRC_PROC_WALKER) #include #endif namespace Botan { std::vector> Library_State::entropy_sources() { std::vector> sources; #if defined(BOTAN_HAS_ENTROPY_SRC_HIGH_RESOLUTION_TIMER) sources.push_back(std::unique_ptr(new High_Resolution_Timestamp)); #endif #if defined(BOTAN_HAS_ENTROPY_SRC_RDRAND) sources.push_back(std::unique_ptr(new Intel_Rdrand)); #endif #if defined(BOTAN_HAS_ENTROPY_SRC_UNIX_PROCESS_RUNNER) sources.push_back(std::unique_ptr(new UnixProcessInfo_EntropySource)); #endif #if defined(BOTAN_HAS_ENTROPY_SRC_DEV_RANDOM) sources.push_back(std::unique_ptr(new Device_EntropySource( { "/dev/random", "/dev/srandom", "/dev/urandom" } ))); #endif #if defined(BOTAN_HAS_ENTROPY_SRC_CAPI) sources.push_back(std::unique_ptr(new Win32_CAPI_EntropySource)); #endif #if defined(BOTAN_HAS_ENTROPY_SRC_PROC_WALKER) sources.push_back(std::unique_ptr( new ProcWalking_EntropySource("/proc"))); #endif #if defined(BOTAN_HAS_ENTROPY_SRC_WIN32) sources.push_back(std::unique_ptr(new Win32_EntropySource)); #endif #if defined(BOTAN_HAS_ENTROPY_SRC_BEOS) sources.push_back(std::unique_ptr(new BeOS_EntropySource)); #endif #if defined(BOTAN_HAS_ENTROPY_SRC_UNIX_PROCESS_RUNNER) sources.push_back(std::unique_ptr( new Unix_EntropySource( { "/bin", "/sbin", "/usr/bin", "/usr/sbin" } ))); #endif #if defined(BOTAN_HAS_ENTROPY_SRC_EGD) sources.push_back(std::unique_ptr( new EGD_EntropySource({ "/var/run/egd-pool", "/dev/egd-pool" }) )); #endif return sources; } void Library_State::poll_available_sources(class Entropy_Accumulator& accum) { std::lock_guard lock(m_entropy_src_mutex); const size_t poll_bits = accum.desired_remaining_bits(); if(!m_sources.empty()) { size_t poll_attempt = 0; while(!accum.polling_goal_achieved() && poll_attempt < poll_bits) { const size_t src_idx = poll_attempt % m_sources.size(); m_sources[src_idx]->poll(accum); ++poll_attempt; } } } }