A simple rngd to collect entropy from Intel's Bull Mountain hwrng using the
rdrand instruction and feed it to the kernel's /dev/random pool.
It also throws a bit of extra entropy into /dev/urandom, because rdrand is so cheap so why not?
$ make
Run as root. It takes no arguments and doesn't fork, so it's easy to run under upstart.
- Find out what capabilities are required and drop to non-root
- Runtime configuration?
- Performance: If there's lots of room in the entropy pool, make one bigger buffer with more entropy rather than repeatedly adding. That syscall is the slowest part of the program.