Messages in this thread |  | | Date | Tue, 21 Aug 2001 05:12:19 +0200 | From | Andi Kleen <> | Subject | Re: [PATCH] let Net Devices feed Entropy, updated (1/2) |
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On Tue, Aug 21, 2001 at 04:02:47AM +0100, Paul Jakma wrote: > On 21 Aug 2001, Andi Kleen wrote: > > > It is not that they are hard to fix; e.g. a $10 sound card > > with a noise generating circuit on input and a small daemon to feed > > /dev/audio to /dev/random can do it; but few people seem to know about > > does this update the entropy count though? from previous > discussions, i believe not, which iiuc means /dev/random will block > just as frequently/infrequently irrespective of whether you feed > stuff into /dev/random.
Just writing into /dev/random feeds it, but only credits a very small amount of entropy into the store, so you need to feed a lot of data. To feed it with full accounting you need to use a special ioctl on /dev/random; e.g. using the rndfeed tool (see ftp.firstfloor.org:/pub/ak/smallsrc/rndfeed.c)
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