diff options
| author | Theo de Raadt <deraadt@cvs.openbsd.org> | 2011-01-06 15:53:52 +0000 |
|---|---|---|
| committer | Theo de Raadt <deraadt@cvs.openbsd.org> | 2011-01-06 15:53:52 +0000 |
| commit | e4fe6acf268c1ecab3c5581987b33c35243a2f63 (patch) | |
| tree | 47840b2d82663390a61fea37a02b810bcf82d5ff /share | |
| parent | d58c7fccef6920a65661b6757848da8280b76383 (diff) | |
document that all *random nodes supply data now
Diffstat (limited to 'share')
| -rw-r--r-- | share/man/man4/random.4 | 35 |
1 files changed, 12 insertions, 23 deletions
diff --git a/share/man/man4/random.4 b/share/man/man4/random.4 index 0912ff2a3c4..2df81c1c70f 100644 --- a/share/man/man4/random.4 +++ b/share/man/man4/random.4 @@ -1,4 +1,4 @@ -.\" $OpenBSD: random.4,v 1.24 2010/12/29 17:51:47 deraadt Exp $ +.\" $OpenBSD: random.4,v 1.25 2011/01/06 15:53:51 deraadt Exp $ .\" .\" Copyright (c) 1996, 1997 Michael Shalayeff .\" @@ -23,7 +23,7 @@ .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" -.Dd $Mdocdate: December 29 2010 $ +.Dd $Mdocdate: January 6 2011 $ .Dt RANDOM 4 .Os .Sh NAME @@ -37,21 +37,20 @@ The various .Nm devices produce random output data with different random qualities. -Entropy data is collected from system activity (like disk and -network device interrupts and such), and then run through various +Entropy data is collected from system activity (like disk, network, +and clock device interrupts and such), and then run through various hash or message digest functions to generate the output. -.Bl -hang -width /dev/arandomX -.It Pa /dev/random -This device is reserved for future support of hardware -random generators. -.It Pa /dev/arandom -As required, entropy pool data re-seeds an ARC4 generator, -which then generates high-quality pseudo-random output data. +All the random devices are expected to provide high high-quality +pseudo-random output data. .Pp The .Xr arc4random 3 -function in userland libraries seeds itself from this device, -providing a second level of ARC4 hashed data. +function in userland libraries seeds itself from this device (or with +the +.Xr sysctl 3 +interface) +providing a second level of ARC4 hashed data without the need to access +these devices every time. .El .Sh FILES .Bl -tag -width /dev/arandom -compact @@ -73,16 +72,6 @@ A device first appeared in the Linux operating system. This is a cloned interface. .Pp -Previous versions of -.Ox -included the -.Nm srandom -and -.Nm urandom -devices. -These interfaces have been deprecated and replaced with -.Nm arandom . -.Pp ARC4 routines added by David Mazieres. .Sh BUGS No randomness testing suite provided. |