52 lines
1.9 KiB
Plaintext
52 lines
1.9 KiB
Plaintext
SSH-RAND-HELPER(8) OpenBSD System Manager's Manual SSH-RAND-HELPER(8)
|
|
|
|
NAME
|
|
ssh-rand-helper - random number gatherer for OpenSSH
|
|
|
|
SYNOPSIS
|
|
ssh-rand-hlper [-vxXh] [-b bytes]
|
|
|
|
DESCRIPTION
|
|
ssh-rand-helper is a small helper program used by ssh(1), ssh-add(1),
|
|
ssh-agent(1), ssh-keygen(1), ssh-keyscan(1) and sshd(8) to gather random
|
|
numbers of cryptographic quality if the openssl(4) library has not been
|
|
configured to provide them itself.
|
|
|
|
Normally ssh-rand-helper will generate a strong random seed and provide
|
|
it to the calling program via standard output. If standard output is a
|
|
tty, ssh-rand-helper will instead print the seed in hexidecimal format
|
|
unless told otherwise.
|
|
|
|
ssh-rand-helper will by default gather random numbers from the system
|
|
commands listed in /etc/ssh/ssh_prng_cmds. The output of each of the
|
|
commands listed will be hashed and used to generate a random seed for the
|
|
calling program. ssh-rand-helper will also store seed files in
|
|
~/.ssh/prng_seed between executions.
|
|
|
|
Alternately, ssh-rand-helper may be configured at build time to collect
|
|
random numbers from a EGD/PRNGd server via a unix domain or localhost tcp
|
|
socket.
|
|
|
|
This program is not intended to be run by the end-user, so the few
|
|
commandline options are for debugging purposes only.
|
|
|
|
-b bytes
|
|
Specify the number of random bytes to include in the output.
|
|
|
|
-x Output a hexidecimal instead of a binary seed.
|
|
|
|
-X Force output of a binary seed, even if standard output is a tty
|
|
|
|
-v Turn on debugging message. Multiple -v options will increase the
|
|
debugging level.
|
|
|
|
-h Display a summary of options.
|
|
|
|
AUTHORS
|
|
Damien Miller <djm@mindrot.org>
|
|
|
|
SEE ALSO
|
|
ssh(1), ssh-add(1), ssh-keygen(1), sshd(8)
|
|
|
|
OpenBSD 4.9 April 14, 2002 OpenBSD 4.9
|