1SSH-KEYSIGN(8)            BSD System Manager's Manual           SSH-KEYSIGN(8)
2

NAME

4     ssh-keysign — ssh helper program for host-based authentication
5

SYNOPSIS

7     ssh-keysign
8

DESCRIPTION

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
12     protocol version 2.
13
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
16     to “yes”.
17
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 authentica‐
20     tion.
21

FILES

23     /etc/ssh/ssh_config
24             Controls whether ssh-keysign is enabled.
25
26     /etc/ssh/ssh_host_dsa_key, /etc/ssh/ssh_host_rsa_key
27             These files contain the private parts of the host keys used to
28             generate the digital signature.  They should be owned by root,
29             readable only by root, and not accessible to others.  Since they
30             are readable only by root, ssh-keysign must be set-uid root if
31             host-based authentication is used.
32

SEE ALSO

34     ssh(1), ssh-keygen(1), ssh_config(5), sshd(8)
35

HISTORY

37     ssh-keysign first appeared in OpenBSD 3.2.
38

AUTHORS

40     Markus Friedl <markus@openbsd.org>
41
42BSD                              June 22, 2019                             BSD