SH-KEYSIGN(8)            BSD System Manager's Manual           SH-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 SH
     protocol version 2.

     ssh-keysign is disabled by default and can only be enabled in the global
     client configuration file /etc/sshconfig by setting EnableSHKeysign 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 authentica-
     tion.

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

     /etc/sshhostdsakey, /etc/sshhostrsakey
             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), sshconfig(5), sshd(8)

HISTORY
     ssh-keysign first appeared in OpenBSD 3.2.

AUTHORS
     Markus Friedl 

BSD                              March 6, 2010                             BSD