On Thu, Jan 03, 2019 at 02:38:11PM +0100, Michael Niewöhner wrote: > On Thu, 2019-01-03 at 15:27 +0200, Jarkko Sakkinen wrote: > > On Sun, Dec 23, 2018 at 12:55:12PM +0100, Michael Niewöhner wrote: > > > There is another issue but I don't know if both are related. Maybe that's > > > just a > > > timing issue... > > > > > > root@debian:~# dd if=/dev/hwrng bs=1 count=1 > > > dd: error reading '/dev/hwrng': Operation not permitted > > > 0+0 records in > > > 0+0 records out > > > 0 bytes copied, 0.755958 s, 0.0 kB/s > > > root@debian:~# dd if=/dev/hwrng bs=1 count=1 | xxd; dd if=/dev/hwrng bs=1 > > > count=1 | xxd > > > dd: error reading '/dev/hwrng': Operation not permitted > > > 0+0 records in > > > 0+0 records out > > > 0 bytes copied, 0.755697 s, 0.0 kB/s > > > 1+0 records in > > > 1+0 records out > > > 00000000: 52 R > > > 1 byte copied, 0.0106268 s, 0.1 kB/s > > > > > > > > > Michael > > > > What does /sys/devices/virtual/misc/hw_random/rng_current show? > > > > Did run commands as a sanity check on my laptop and seem to work. > > > > /Jarkko > > rng_current says "tpm-rng-0", which should be correct Is /dev/tpm0 accessible and usable? /Jarkko
