55 messages in org.freebsd.freebsd-currentRe: entropy reseeding is totally broken | From | Sent On | Attachments |
|---|---|---|
| Андрей Чернов | Oct 19, 2000 9:48 pm | |
| Udo Schweigert | Oct 19, 2000 10:57 pm | |
| Андрей Чернов | Oct 19, 2000 11:39 pm | |
| Андрей Чернов | Oct 19, 2000 11:51 pm | |
| Doug Barton | Oct 20, 2000 1:18 am | |
| Андрей Чернов | Oct 20, 2000 9:27 am | |
| Андрей Чернов | Oct 20, 2000 9:43 am | |
| Mark Murray | Oct 20, 2000 10:06 am | |
| Андрей Чернов | Oct 20, 2000 1:13 pm | |
| Warner Losh | Oct 24, 2000 11:15 am | |
| Terry Lambert | Oct 25, 2000 3:35 am | |
| Андрей Чернов | Oct 25, 2000 3:50 am | |
| Mark Murray | Oct 25, 2000 10:37 am | |
| Андрей Чернов | Oct 25, 2000 11:12 am | |
| Wesley Morgan | Oct 25, 2000 2:15 pm | |
| Mark Murray | Oct 25, 2000 3:12 pm | |
| John W. De Boskey | Oct 25, 2000 4:20 pm | |
| Wesley Morgan | Oct 25, 2000 4:50 pm | |
| Mark Murray | Oct 25, 2000 5:01 pm | |
| Doug Barton | Oct 25, 2000 9:28 pm | |
| Ed Hall | Oct 26, 2000 12:30 am | |
| David O'Brien | Oct 26, 2000 12:50 am | |
| Андрей Чернов | Oct 26, 2000 1:47 am | |
| Kris Kennaway | Oct 26, 2000 2:17 am | |
| Kris Kennaway | Oct 26, 2000 2:21 am | |
| Андрей Чернов | Oct 26, 2000 2:54 am | |
| Андрей Чернов | Oct 26, 2000 3:01 am | |
| Rod Taylor | Oct 26, 2000 3:30 am | |
| Андрей Чернов | Oct 26, 2000 3:34 am | |
| Jordan Hubbard | Oct 26, 2000 5:20 am | |
| John W. De Boskey | Oct 26, 2000 6:24 am | |
| Matt Dillon | Oct 26, 2000 9:55 am | |
| Mark Murray | Oct 26, 2000 10:06 am | |
| Mark Murray | Oct 26, 2000 10:17 am | |
| John Baldwin | Oct 26, 2000 11:06 am | |
| Андрей Чернов | Oct 26, 2000 11:36 am | |
| Terry Lambert | Oct 26, 2000 12:04 pm | |
| Mark Murray | Oct 26, 2000 12:39 pm | |
| Doug Barton | Oct 26, 2000 12:49 pm | |
| David O'Brien | Oct 26, 2000 1:26 pm | |
| Mark Murray | Oct 26, 2000 1:29 pm | |
| Matt Dillon | Oct 26, 2000 1:47 pm | |
| Mark Murray | Oct 26, 2000 2:02 pm | |
| Ed Hall | Oct 26, 2000 2:03 pm | |
| Matt Dillon | Oct 26, 2000 2:25 pm | |
| Doug Barton | Oct 26, 2000 2:44 pm | |
| Poul-Henning Kamp | Oct 26, 2000 2:51 pm | |
| Wesley Morgan | Oct 26, 2000 3:07 pm | |
| David O'Brien | Oct 26, 2000 3:15 pm | |
| Poul-Henning Kamp | Oct 26, 2000 3:18 pm | |
| Jim Bryant | Oct 26, 2000 3:29 pm | |
| Mark Murray | Oct 26, 2000 3:56 pm | |
| Doug Barton | Oct 26, 2000 9:00 pm | |
| Terry Lambert | Oct 27, 2000 5:19 pm | |
| Doug Barton | Oct 27, 2000 7:18 pm |
| Subject: | Re: entropy reseeding is totally broken | |
|---|---|---|
| From: | Poul-Henning Kamp (ph...@critter.freebsd.dk) | |
| Date: | Oct 26, 2000 2:51:41 pm | |
| List: | org.freebsd.freebsd-current | |
In message <Pine...@dt051n37.san.rr.com>, Doug Barton writes:
On Thu, 26 Oct 2000, Ed Hall wrote:
How about skipping the "long, annoying failover process" altogether and simply logging to the console that the entropy reseeding process was incomplete? Forcing an indeterminate delay to gather entropy is more than a little paternalistic.
The problem is, it's going to block somewhere. If we don't "block" while creating the entropy, the first thing that needs random bits is going to block for real because /dev/random isn't going to have anything to feed it.
We must come up with an entropy reseeding mechanism that has a reasonably high degree of success for a reasonably high number of cases.
I think the strategy here is to feed it as much as we can from the kernel during device-probe/attach as possible.
I don't really care that much how good my random bits are right after boot, but I do care about my machine coming up quickly.
Add a /etc/rc.conf knob which says
wait_until_entropy_collected=YES
which people who care a lot about randomness can set.
-- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 ph...@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.
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