SSH-KEYSIGN(8)							SSH-KEYSIGN(8)

NAME
       ssh-keysign - ssh helper program for host-based authentication

SYNOPSIS
       ssh-keysign

DESCRIPTION
       ssh-keysign  is used by ssh(1) to access the local host keys and gener‐
       ate the digital signature  required  during  host-based	authentication
       with SSH protocol version 2.

       ssh-keysign  is	disabled  by  default  and  can only be enabled in the
       global client configuration  file  /boot/common/settings/ssh/ssh_config
       by setting EnableSSHKeysign to ``yes''.

       ssh-keysign is not intended to be invoked by the user, but from ssh(1).
       See ssh(1) and sshd(8) for more information about host-based  authenti‐
       cation.

FILES
       /boot/common/settings/ssh/ssh_config
	      Controls whether ssh-keysign is enabled.

       /boot/common/settings/ssh/ssh_host_dsa_key

       /boot/common/settings/ssh/ssh_host_ecdsa_key

       /boot/common/settings/ssh/ssh_host_rsa_key
	      These  files  contain the private parts of the host keys used to
	      generate the digital signature.  They should be owned  by	 root,
	      readable only by root, and not accessible to others.  Since they
	      are readable only by root, ssh-keysign must be set-uid  root  if
	      host-based authentication is used.

       /boot/common/settings/ssh/ssh_host_dsa_key-cert.pub

       /boot/common/settings/ssh/ssh_host_ecdsa_key-cert.pub

       /boot/common/settings/ssh/ssh_host_rsa_key-cert.pub
	      If these files exist they are assumed to contain public certifi‐
	      cate information corresponding with the private keys above.

SEE ALSO
       ssh(1), ssh-keygen(1), ssh_config(5), sshd(8)

HISTORY
       ssh-keysign first appeared in OpenBSD 3.2 .

AUTHORS
       Markus Friedl <markus@openbsd.org>

				August 31 2010			SSH-KEYSIGN(8)

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