NAME
ssh-keysign —
ssh helper program for
host-based authentication
SYNOPSIS
DESCRIPTION
ssh-keysign is used by
ssh(1) to access the local host
keys and generate 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
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_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
certificate 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>