SSH-KEYSIGN(8)                                     BSD System Manager's Manual                                    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 generate 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 /etc/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 authentication.

FILES
     /etc/ssh/ssh_config
             Controls whether ssh-keysign is enabled.

     /etc/ssh/ssh_host_dsa_key, /etc/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.

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

HISTORY
     ssh-keysign first appeared in OpenBSD 3.2.

AUTHORS
     Markus Friedl <markusATopenbsd.org>

BSD                                                      April 12, 2014                                                      BSD