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Diffstat (limited to 'ssh-keysign.8')
| -rw-r--r-- | ssh-keysign.8 | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/ssh-keysign.8 b/ssh-keysign.8 new file mode 100644 index 0000000..6b4b9b2 --- /dev/null +++ b/ssh-keysign.8 @@ -0,0 +1,93 @@ +.\" $OpenBSD: ssh-keysign.8,v 1.17 2022/03/31 17:27:27 naddy Exp $ +.\" +.\" Copyright (c) 2002 Markus Friedl. All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR +.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES +.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. +.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, +.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT +.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF +.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +.\" +.Dd $Mdocdate: March 31 2022 $ +.Dt SSH-KEYSIGN 8 +.Os +.Sh NAME +.Nm ssh-keysign +.Nd OpenSSH helper for host-based authentication +.Sh SYNOPSIS +.Nm +.Sh DESCRIPTION +.Nm +is used by +.Xr ssh 1 +to access the local host keys and generate the digital signature +required during host-based authentication. +.Pp +.Nm +is disabled by default and can only be enabled in the +global client configuration file +.Pa /etc/ssh/ssh_config +by setting +.Cm EnableSSHKeysign +to +.Dq yes . +.Pp +.Nm +is not intended to be invoked by the user, but from +.Xr ssh 1 . +See +.Xr ssh 1 +and +.Xr sshd 8 +for more information about host-based authentication. +.Sh FILES +.Bl -tag -width Ds -compact +.It Pa /etc/ssh/ssh_config +Controls whether +.Nm +is enabled. +.Pp +.It Pa /etc/ssh/ssh_host_dsa_key +.It Pa /etc/ssh/ssh_host_ecdsa_key +.It Pa /etc/ssh/ssh_host_ed25519_key +.It Pa /etc/ssh/ssh_host_rsa_key +These files contain the private parts of the host keys used to +generate the digital signature. +They should be owned by root, readable only by root, and not +accessible to others. +Since they are readable only by root, +.Nm +must be set-uid root if host-based authentication is used. +.Pp +.It Pa /etc/ssh/ssh_host_dsa_key-cert.pub +.It Pa /etc/ssh/ssh_host_ecdsa_key-cert.pub +.It Pa /etc/ssh/ssh_host_ed25519_key-cert.pub +.It Pa /etc/ssh/ssh_host_rsa_key-cert.pub +If these files exist, they are assumed to contain public certificate +information corresponding with the private keys above. +.El +.Sh SEE ALSO +.Xr ssh 1 , +.Xr ssh-keygen 1 , +.Xr ssh_config 5 , +.Xr sshd 8 +.Sh HISTORY +.Nm +first appeared in +.Ox 3.2 . +.Sh AUTHORS +.An Markus Friedl Aq Mt markus@openbsd.org |