On 2016-06-11 08:37, Etienne CHAMPETIER wrote: > This commit: > 1) seed /dev/urandom with a saved seed as early as possible > (using /lib/preinit/81_urandom_seed) > 2) save a new seed using getrandom() so we are sure /dev/urandom > pool is initialized (using /etc/init.d/urandom_seed) > > seed size is 512 bytes (ie /proc/sys/kernel/random/poolsize / 8) > it's the same size as in ubuntu 14.04 and all systemd systems > > seed file is /etc/urandom.seed (need a writable path) > > seeding /dev/urandom doesn't change entropy estimation, so we still have > "random: ubus urandom read with 4 bits of entropy available" > messages in the logs, but we can now ignore them > > We could also add an urandom.seed at build time to improve first boot I'm not sure writing to flash on every single boot on every device is a good default behavior.
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