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. 12 13 ssh-keysign is disabled by default and can only be enabled in the global 14 client configuration file /etc/ssh/ssh_config by setting EnableSSHKeysign 15 to M-bM-^@M-^\yesM-bM-^@M-^]. 16 17 ssh-keysign is not intended to be invoked by the user, but from ssh(1). 18 See ssh(1) and sshd(8) for more information about host-based 19 authentication. 20 21 FILES 22 /etc/ssh/ssh_config 23 Controls whether ssh-keysign is enabled. 24 25 /etc/ssh/ssh_host_dsa_key 26 /etc/ssh/ssh_host_ecdsa_key 27 /etc/ssh/ssh_host_ed25519_key 28 /etc/ssh/ssh_host_rsa_key 29 These files contain the private parts of the host keys used to 30 generate the digital signature. They should be owned by root, 31 readable only by root, and not accessible to others. Since they 32 are readable only by root, ssh-keysign must be set-uid root if 33 host-based authentication is used. 34 35 /etc/ssh/ssh_host_dsa_key-cert.pub 36 /etc/ssh/ssh_host_ecdsa_key-cert.pub 37 /etc/ssh/ssh_host_ed25519_key-cert.pub 38 /etc/ssh/ssh_host_rsa_key-cert.pub 39 If these files exist they are assumed to contain public 40 certificate information corresponding with the private keys 41 above. 42 43 SEE ALSO 44 ssh(1), ssh-keygen(1), ssh_config(5), sshd(8) 45 46 HISTORY 47 ssh-keysign first appeared in OpenBSD 3.2. 48 49 AUTHORS 50 Markus Friedl <markus (a] openbsd.org> 51 52 OpenBSD 6.0 February 17, 2016 OpenBSD 6.0 53
