1SSH-KEYSIGN(8)              System Manager's Manual             SSH-KEYSIGN(8)
2
3NAME
4     ssh-keysign M-bM-^@M-^S ssh helper program for host-based authentication
5
6SYNOPSIS
7     ssh-keysign
8
9DESCRIPTION
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 M-bM-^@M-^\yesM-bM-^@M-^].
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
20     authentication.
21
22FILES
23     /etc/ssh/ssh_config
24             Controls whether ssh-keysign is enabled.
25
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.
35
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
42             above.
43
44SEE ALSO
45     ssh(1), ssh-keygen(1), ssh_config(5), sshd(8)
46
47HISTORY
48     ssh-keysign first appeared in OpenBSD 3.2.
49
50AUTHORS
51     Markus Friedl <markus@openbsd.org>
52
53OpenBSD 5.7                    December 7, 2013                    OpenBSD 5.7
54