Hi all. I was pointed to this mailing list, so I hope my query is
reasonably on topic.
I've developed simple firmware on a microcontroller which uses the values
of multiple floating analog inputs to generate random numbers. I'd like to
use this as an external source to add entropy into a FreeBSD system.
I think the best way to do it would be to call random_harvest_queue(...),
but what do I use as the source enum (see /usr/include/sys/random.h)?
ENTROPYSOURCE, I guess?
I believe it's also possible to open /dev/random for write to inject
entropy, and I'm sure I saw mention of this being available around 12.0R,
but I cannot find any mention of that scenario in the man pages.
I guess the other question to ask is whether ~45 kilobytes per second of
additional entropy is even useful in a typical situation? There's no
strict security requirement or anything like that, it's really just a fun
project that I'm hoping to actually use. :) All entropy is good entropy,
right?
Thanks in advance.
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