NAME
ssh-keysign
—
OpenSSH helper 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.
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
HISTORY
ssh-keysign
first appeared in
OpenBSD 3.2.
AUTHORS
Markus Friedl <markus@openbsd.org>