| 1 | .\" $OpenBSD: ssh-keysign.8,v 1.3 2002/07/03 14:21:05 markus Exp $ |
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| 2 | .\" |
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| 3 | .\" Copyright (c) 2002 Markus Friedl. All rights reserved. |
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| 4 | .\" |
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| 5 | .\" Redistribution and use in source and binary forms, with or without |
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| 6 | .\" modification, are permitted provided that the following conditions |
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| 7 | .\" are met: |
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| 8 | .\" 1. Redistributions of source code must retain the above copyright |
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| 9 | .\" notice, this list of conditions and the following disclaimer. |
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| 10 | .\" 2. Redistributions in binary form must reproduce the above copyright |
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| 11 | .\" notice, this list of conditions and the following disclaimer in the |
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| 12 | .\" documentation and/or other materials provided with the distribution. |
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| 13 | .\" |
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| 14 | .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 15 | .\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 16 | .\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 17 | .\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 18 | .\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 19 | .\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 20 | .\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 21 | .\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 22 | .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 23 | .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 24 | .\" |
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| 25 | .Dd May 24, 2002 |
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| 26 | .Dt SSH-KEYSIGN 8 |
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| 27 | .Os |
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| 28 | .Sh NAME |
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| 29 | .Nm ssh-keysign |
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| 30 | .Nd ssh helper program for hostbased authentication |
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| 31 | .Sh SYNOPSIS |
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| 32 | .Nm |
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| 33 | .Sh DESCRIPTION |
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| 34 | .Nm |
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| 35 | is used by |
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| 36 | .Xr ssh 1 |
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| 37 | to access the local host keys and generate the digital signature |
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| 38 | required during hostbased authentication with SSH protocol version 2. |
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| 39 | .Pp |
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| 40 | .Nm |
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| 41 | is disabled by default and can only be enabled in the |
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| 42 | the global client configuration file |
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| 43 | .Pa /etc/ssh/ssh_config |
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| 44 | by setting |
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| 45 | .Cm HostbasedAuthentication |
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| 46 | to |
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| 47 | .Dq yes . |
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| 48 | .Pp |
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| 49 | .Nm |
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| 50 | is not intended to be invoked by the user, but from |
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| 51 | .Xr ssh 1 . |
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| 52 | See |
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| 53 | .Xr ssh 1 |
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| 54 | and |
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| 55 | .Xr sshd 8 |
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| 56 | for more information about hostbased authentication. |
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| 57 | .Sh FILES |
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| 58 | .Bl -tag -width Ds |
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| 59 | .It Pa /etc/ssh/ssh_config |
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| 60 | Controls whether |
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| 61 | .Nm |
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| 62 | is enabled. |
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| 63 | .It Pa /etc/ssh/ssh_host_dsa_key, /etc/ssh/ssh_host_rsa_key |
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| 64 | These files contain the private parts of the host keys used to |
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| 65 | generate the digital signature. They |
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| 66 | should be owned by root, readable only by root, and not |
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| 67 | accessible to others. |
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| 68 | Since they are readable only by root, |
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| 69 | .Nm |
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| 70 | must be set-uid root if hostbased authentication is used. |
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| 71 | .El |
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| 72 | .Sh SEE ALSO |
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| 73 | .Xr ssh 1 , |
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| 74 | .Xr ssh-keygen 1 , |
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| 75 | .Xr ssh_config 5 , |
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| 76 | .Xr sshd 8 |
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| 77 | .Sh AUTHORS |
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| 78 | Markus Friedl <markus@openbsd.org> |
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| 79 | .Sh HISTORY |
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| 80 | .Nm |
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| 81 | first appeared in |
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| 82 | .Ox 3.2 . |
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