From: Keith Packard <keithp@keithp.com>
To: Henrique de Moraes Holschuh <hmh@hmh.eng.br>,
Jason Cooper <jason@lakedaemon.net>
Cc: Herbert Xu <herbert@gondor.apana.org.au>,
linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] hwrng: core - Allow for multiple simultaneous active hwrng devices
Date: Tue, 09 Aug 2016 16:26:30 -0700 [thread overview]
Message-ID: <86bn11r0bd.fsf@hiro.keithp.com> (raw)
In-Reply-To: <20160809201846.GA4684@khazad-dum.debian.net>
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Henrique de Moraes Holschuh <hmh@hmh.eng.br> writes:
> IMHO, this is mightly annoying to use from inside a rngd-like utility in
> a race-free, safe way. It looks to me that ioctl() would be a much
> better interface for everything but the "enabled" functionality (which
> should be reported to the rngd-like utility as open() on the real device
> failing with, e.g., ENXIO, when that source is disabled).
What information does an rngd-like program actually want? All I can
think that it would need is the stream of random data. I guess some
estimate of the entropy available would be nice, but surely it would
want to verify that in any case.
--
-keith
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prev parent reply other threads:[~2016-08-09 23:26 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-25 20:07 [PATCH] hwrng: core - Allow for multiple simultaneous active hwrng devices Keith Packard
2016-08-09 9:50 ` Herbert Xu
2016-08-09 16:57 ` Jason Cooper
2016-08-09 17:58 ` Keith Packard
2016-08-09 18:26 ` Jason Cooper
2016-08-09 19:01 ` Keith Packard
2016-08-09 20:18 ` Henrique de Moraes Holschuh
2016-08-09 23:26 ` Keith Packard [this message]
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