1 SSH-KEYSIGN(8) System Manager's Manual SSH-KEYSIGN(8) 2 3 NAME 4 ssh-keysign M-bM-^@M-^S ssh helper program for host-based authentication 5 6 SYNOPSIS 7 ssh-keysign 8 9 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 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 22 FILES 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 44 SEE ALSO 45 ssh(1), ssh-keygen(1), ssh_config(5), sshd(8) 46 47 HISTORY 48 ssh-keysign first appeared in OpenBSD 3.2. 49 50 AUTHORS 51 Markus Friedl <markus (a] openbsd.org> 52 53 OpenBSD 5.8 December 7, 2013 OpenBSD 5.8 54
