diff options
Diffstat (limited to 'src/libs/3rdparty/botan/src/lib/entropy/dev_random/dev_random.cpp')
-rw-r--r-- | src/libs/3rdparty/botan/src/lib/entropy/dev_random/dev_random.cpp | 123 |
1 files changed, 0 insertions, 123 deletions
diff --git a/src/libs/3rdparty/botan/src/lib/entropy/dev_random/dev_random.cpp b/src/libs/3rdparty/botan/src/lib/entropy/dev_random/dev_random.cpp deleted file mode 100644 index 56552228a3..0000000000 --- a/src/libs/3rdparty/botan/src/lib/entropy/dev_random/dev_random.cpp +++ /dev/null @@ -1,123 +0,0 @@ -/* -* Reader of /dev/random and company -* (C) 1999-2009,2013 Jack Lloyd -* -* Botan is released under the Simplified BSD License (see license.txt) -*/ - -#include <botan/internal/dev_random.h> -#include <botan/exceptn.h> - -#include <sys/types.h> -#include <sys/select.h> -#include <sys/stat.h> -#include <unistd.h> -#include <errno.h> -#include <fcntl.h> - -namespace Botan { - -/** -Device_EntropySource constructor -Open a file descriptor to each (available) device in fsnames -*/ -Device_EntropySource::Device_EntropySource(const std::vector<std::string>& fsnames) - { -#ifndef O_NONBLOCK - #define O_NONBLOCK 0 -#endif - -#ifndef O_NOCTTY - #define O_NOCTTY 0 -#endif - - const int flags = O_RDONLY | O_NONBLOCK | O_NOCTTY; - - m_max_fd = 0; - - for(auto fsname : fsnames) - { - int fd = ::open(fsname.c_str(), flags); - - if(fd < 0) - { - /* - ENOENT or EACCES is normal as some of the named devices may not exist - on this system. But any other errno value probably indicates - either a bug in the application or file descriptor exhaustion. - */ - if(errno != ENOENT && errno != EACCES) - throw Exception("Opening OS RNG device failed with errno " + - std::to_string(errno)); - } - else - { - if(fd > FD_SETSIZE) - { - ::close(fd); - throw Exception("Open of OS RNG succeeded but fd is too large for fd_set"); - } - - m_dev_fds.push_back(fd); - m_max_fd = std::max(m_max_fd, fd); - } - } - } - -/** -Device_EntropySource destructor: close all open devices -*/ -Device_EntropySource::~Device_EntropySource() - { - for(int fd : m_dev_fds) - { - // ignoring return value here, can't throw in destructor anyway - ::close(fd); - } - } - -/** -* Gather entropy from a RNG device -*/ -size_t Device_EntropySource::poll(RandomNumberGenerator& rng) - { - size_t bits = 0; - - if(m_dev_fds.size() > 0) - { - fd_set read_set; - FD_ZERO(&read_set); - - for(int dev_fd : m_dev_fds) - { - FD_SET(dev_fd, &read_set); - } - - secure_vector<uint8_t> io_buf(BOTAN_SYSTEM_RNG_POLL_REQUEST); - - struct ::timeval timeout; - timeout.tv_sec = (BOTAN_SYSTEM_RNG_POLL_TIMEOUT_MS / 1000); - timeout.tv_usec = (BOTAN_SYSTEM_RNG_POLL_TIMEOUT_MS % 1000) * 1000; - - if(::select(m_max_fd + 1, &read_set, nullptr, nullptr, &timeout) > 0) - { - for(int dev_fd : m_dev_fds) - { - if(FD_ISSET(dev_fd, &read_set)) - { - const ssize_t got = ::read(dev_fd, io_buf.data(), io_buf.size()); - - if(got > 0) - { - rng.add_entropy(io_buf.data(), static_cast<size_t>(got)); - bits += got * 8; - } - } - } - } - } - - return bits; - } - -} |