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.

       ssh-keysign is disabled by default and  can  only  be  enabled  in  the
       global  client  configuration file /etc/ssh/ssh_config by setting Enab-
       leSSHKeysign 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

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

       /etc/ssh/ssh_host_dsa_key

       /etc/ssh/ssh_host_ecdsa_key

       /etc/ssh/ssh_host_ed25519_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.

       /etc/ssh/ssh_host_dsa_key-cert.pub

       /etc/ssh/ssh_host_ecdsa_key-cert.pub

       /etc/ssh/ssh_host_ed25519_key-cert.pub

       /etc/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 <Mt markus@openbsd.org>

                               February 17 2016                 SSH-KEYSIGN(8)