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eb8b60e320
[PROTOCOL PROTOCOL.agent PROTOCOL.certkeys auth2-jpake.c authfd.c]
[authfile.c buffer.h dns.c kex.c kex.h key.c key.h monitor.c]
[monitor_wrap.c myproposal.h packet.c packet.h pathnames.h readconf.c]
[ssh-add.1 ssh-add.c ssh-agent.1 ssh-agent.c ssh-keygen.1 ssh-keygen.c]
[ssh-keyscan.1 ssh-keyscan.c ssh-keysign.8 ssh.1 ssh.c ssh2.h]
[ssh_config.5 sshconnect.c sshconnect2.c sshd.8 sshd.c sshd_config.5]
[uuencode.c uuencode.h bufec.c kexecdh.c kexecdhc.c kexecdhs.c ssh-ecdsa.c]
Implement Elliptic Curve Cryptography modes for key exchange (ECDH) and
host/user keys (ECDSA) as specified by RFC5656. ECDH and ECDSA offer
better performance than plain DH and DSA at the same equivalent symmetric
key length, as well as much shorter keys.
Only the mandatory sections of RFC5656 are implemented, specifically the
three REQUIRED curves nistp256, nistp384 and nistp521 and only ECDH and
ECDSA. Point compression (optional in RFC5656 is NOT implemented).
Certificate host and user keys using the new ECDSA key types are supported.
Note that this code has not been tested for interoperability and may be
subject to change.
feedback and ok markus@
92 lines
2.9 KiB
Groff
92 lines
2.9 KiB
Groff
.\" $OpenBSD: ssh-keysign.8,v 1.12 2010/08/31 11:54:45 djm Exp $
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.\"
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.\" Copyright (c) 2002 Markus Friedl. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd $Mdocdate: August 31 2010 $
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.Dt SSH-KEYSIGN 8
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.Os
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.Sh NAME
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.Nm ssh-keysign
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.Nd ssh helper program for host-based authentication
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.Sh SYNOPSIS
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.Nm
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.Sh DESCRIPTION
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.Nm
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is used by
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.Xr ssh 1
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to access the local host keys and generate the digital signature
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required during host-based authentication with SSH protocol version 2.
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.Pp
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.Nm
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is disabled by default and can only be enabled in the
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global client configuration file
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.Pa /etc/ssh/ssh_config
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by setting
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.Cm EnableSSHKeysign
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to
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.Dq yes .
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.Pp
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.Nm
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is not intended to be invoked by the user, but from
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.Xr ssh 1 .
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See
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.Xr ssh 1
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and
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.Xr sshd 8
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for more information about host-based authentication.
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.Sh FILES
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.Bl -tag -width Ds -compact
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.It Pa /etc/ssh/ssh_config
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Controls whether
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.Nm
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is enabled.
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.Pp
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.It Pa /etc/ssh/ssh_host_dsa_key
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.It Pa /etc/ssh/ssh_host_ecdsa_key
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.It Pa /etc/ssh/ssh_host_rsa_key
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These files contain the private parts of the host keys used to
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generate the digital signature.
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They should be owned by root, readable only by root, and not
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accessible to others.
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Since they are readable only by root,
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.Nm
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must be set-uid root if host-based authentication is used.
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.Pp
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.It Pa /etc/ssh/ssh_host_dsa_key-cert.pub
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.It Pa /etc/ssh/ssh_host_ecdsa_key-cert.pub
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.It Pa /etc/ssh/ssh_host_rsa_key-cert.pub
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If these files exist they are assumed to contain public certificate
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information corresponding with the private keys above.
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.El
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.Sh SEE ALSO
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.Xr ssh 1 ,
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.Xr ssh-keygen 1 ,
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.Xr ssh_config 5 ,
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.Xr sshd 8
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.Sh HISTORY
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.Nm
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first appeared in
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.Ox 3.2 .
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.Sh AUTHORS
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.An Markus Friedl Aq markus@openbsd.org
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