Subject: Re: /dev/random without random sources blocking forever?
To: Bill Studenmund <email@example.com>
From: Daniel Carosone <firstname.lastname@example.org>
Date: 08/22/2006 14:22:19
Content-Type: text/plain; charset=us-ascii
On Mon, Aug 21, 2006 at 08:28:06PM -0700, Bill Studenmund wrote:
> To be honest, does it make sense for you to be able to open /dev/random=
> without any real entropy sources available?=20
possibly not, ENXIO or something might be more sensible, but..
> Userland can't add entropy sources
Yes, it can.
* rndctl can enable sources that are disabled by default, such as
network interfaces. This could unblock random some time later.=20
* root can also feed data into the pool, though this won't affect the
estimator and unblock random, it will reseed urandom.
* the user to plug in a device (eg, usb mouse or disk) as a source.
* it might also be possible for userland to load an LKM that
added a source
Perhaps we should enable network sources by default if no others are
available, or just by default always.
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