SSH-KEYSIGN(8)              System Manager's Manual             SSH-KEYSIGN(8)

NAME
     ssh-keysign – ssh helper program for hostbased 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 hostbased authentication with SSH
     protocol version 2.

     ssh-keysign is disabled by default and can only be enabled in the the
     global client configuration file /etc/ssh/ssh_config by setting
     HostbasedAuthentication 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 hostbased
     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
             hostbased authentication is used.

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

AUTHORS
     Markus Friedl <markus@openbsd.org>

HISTORY
     ssh-keysign first appeared in OpenBSD 3.2.

BSD                              May 24, 2002                              BSD