ssh-keysign —
ssh helper program for hostbased authentication
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 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 hostbased
authentication.
- /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.
ssh-keysign first appeared in OpenBSD
3.2.
Markus Friedl ⟨markus@openbsd.org⟩