On Fri Mar 28 13:21:35 EDT 2014, ba...@bitblocks.com wrote: > I have put an initial version of raspberryPi hardware RNG > driver on sources. Supposedly bcm2835 uses a reverse bias > transistor as a noise source (though I couldn't find anything > a definitive source for this). FWIW, I ran the output through > rngtest (does FIPS 140-2 tests) and the failure rate is about > the same as FreeBSD's (about 1 out of 1000). rngtest tests at > a minimum 2*10^6 bits and plan9's stock /dev/random seems far > too slow so I didn't bother testing it. > > Just copy /n/sources/contrib/bakul/random.c to sys/src/9/bcm > and rebuild 9pi. > > Arguably this should be a new device, /dev/hrng or something, > but plan9's /dev/random code is very simple compared to the > elaborate versions on *BSD's. I have kept this one simple too. > If you are concerned about the quality of RNG or paranoid > about bcm2835's unpublic algorithm, feel free to complexify!
i have not had luck with this. i get data aborts when booting from flash, and hangs when rebooting via /dev/reboot. - erik
