1 SSH-KEYSIGN(8) OpenBSD System Manager's Manual SSH-KEYSIGN(8)
4 ssh-keysign - ssh helper program for host-based authentication
10 ssh-keysign is used by ssh(1) to access the local host keys and generate
11 the digital signature required during host-based authentication with SSH
14 ssh-keysign is disabled by default and can only be enabled in the global
15 client configuration file /etc/ssh/ssh_config by setting EnableSSHKeysign
18 ssh-keysign is not intended to be invoked by the user, but from ssh(1).
19 See ssh(1) and sshd(8) for more information about host-based
24 Controls whether ssh-keysign is enabled.
26 /etc/ssh/ssh_host_dsa_key
27 /etc/ssh/ssh_host_ecdsa_key
28 /etc/ssh/ssh_host_ed25519_key
29 /etc/ssh/ssh_host_rsa_key
30 These files contain the private parts of the host keys used to
31 generate the digital signature. They should be owned by root,
32 readable only by root, and not accessible to others. Since they
33 are readable only by root, ssh-keysign must be set-uid root if
34 host-based authentication is used.
36 /etc/ssh/ssh_host_dsa_key-cert.pub
37 /etc/ssh/ssh_host_ecdsa_key-cert.pub
38 /etc/ssh/ssh_host_ed25519_key-cert.pub
39 /etc/ssh/ssh_host_rsa_key-cert.pub
40 If these files exist they are assumed to contain public
41 certificate information corresponding with the private keys
45 ssh(1), ssh-keygen(1), ssh_config(5), sshd(8)
48 ssh-keysign first appeared in OpenBSD 3.2.
51 Markus Friedl <markus@openbsd.org>
53 OpenBSD 5.5 December 7, 2013 OpenBSD 5.5