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-rw-r--r--src/entropy/dev_random/dev_random.cpp97
1 files changed, 0 insertions, 97 deletions
diff --git a/src/entropy/dev_random/dev_random.cpp b/src/entropy/dev_random/dev_random.cpp
deleted file mode 100644
index 3f8df8749..000000000
--- a/src/entropy/dev_random/dev_random.cpp
+++ /dev/null
@@ -1,97 +0,0 @@
-/*
-* Reader of /dev/random and company
-* (C) 1999-2009,2013 Jack Lloyd
-*
-* Distributed under the terms of the Botan license
-*/
-
-#include <botan/internal/dev_random.h>
-#include <botan/internal/rounding.h>
-
-#include <sys/types.h>
-#include <sys/select.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <string.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;
-
- for(auto fsname : fsnames)
- {
- fd_type fd = ::open(fsname.c_str(), flags);
-
- if(fd >= 0 && fd < FD_SETSIZE)
- m_devices.push_back(fd);
- else if(fd >= 0)
- ::close(fd);
- }
- }
-
-/**
-Device_EntropySource destructor: close all open devices
-*/
-Device_EntropySource::~Device_EntropySource()
- {
- for(size_t i = 0; i != m_devices.size(); ++i)
- ::close(m_devices[i]);
- }
-
-/**
-* Gather entropy from a RNG device
-*/
-void Device_EntropySource::poll(Entropy_Accumulator& accum)
- {
- if(m_devices.empty())
- return;
-
- const size_t ENTROPY_BITS_PER_BYTE = 8;
- const size_t MS_WAIT_TIME = 32;
- const size_t READ_ATTEMPT = std::max<size_t>(accum.desired_remaining_bits() / 8, 16);
-
- int max_fd = m_devices[0];
- fd_set read_set;
- FD_ZERO(&read_set);
- for(size_t i = 0; i != m_devices.size(); ++i)
- {
- FD_SET(m_devices[i], &read_set);
- max_fd = std::max(m_devices[i], max_fd);
- }
-
- struct ::timeval timeout;
-
- timeout.tv_sec = (MS_WAIT_TIME / 1000);
- timeout.tv_usec = (MS_WAIT_TIME % 1000) * 1000;
-
- if(::select(max_fd + 1, &read_set, nullptr, nullptr, &timeout) < 0)
- return;
-
- secure_vector<byte>& io_buffer = accum.get_io_buffer(READ_ATTEMPT);
-
- for(size_t i = 0; i != m_devices.size(); ++i)
- {
- if(FD_ISSET(m_devices[i], &read_set))
- {
- const ssize_t got = ::read(m_devices[i], &io_buffer[0], io_buffer.size());
- accum.add(&io_buffer[0], got, ENTROPY_BITS_PER_BYTE);
- }
- }
- }
-
-}