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.\" Copyright (c) 2011-2012 Yubico AB
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions are
.\" met:
.\"
.\" * Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\"
.\" * 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 COPYRIGHT HOLDERS AND CONTRIBUTORS
.\" "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 COPYRIGHT
.\" OWNER OR CONTRIBUTORS 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.
.\"
.\" The following commands are required for all man pages.
.de URL
\\$2 \(laURL: \\$1 \(ra\\$3
..
.if \n[.g] .mso www.tmac
.TH ykpamcfg "1" "March 2011" "yubikey-personalization"
.SH NAME
ykpamcfg - Manage user settings for the Yubico PAM module.
.SH SYNOPSIS
.B ykpamcfg
[\fI-1\fR | \fI-2\fR] [\fI-A\fR] [\fI-v\fR] [\fI-h\fR]
.\".SH DESCRIPTION
.\" Add any additional description here
.SH OPTIONS
.PP
.TP
\fB\-1\fR
use slot 1. This is the default.
.TP
\fB\-2\fR
use slot 2.
.TP
\fB\-A \fIaction\fR
choose action to perform. See ACTIONS below.
.TP
\fB\-v\fR
enable verbose mode.
.SH ACTIONS
.TP
\fBadd_hmac_chalresp\fR
The PAM module can utilize the HMAC-SHA1 Challenge-Response mode found in YubiKeys
starting with version 2.2 for \fBoffline authentication\fR. This action creates the initial state
information with the C/R to be issued at the next logon.
The utility currently outputs the state information to a file in the current user's
home directory (\fI~/.yubico/challenge-123456\fR for a YubiKey with serial number API readout
enabled, and \fI~/.yubico/challenge\fR for one without).
The PAM module supports a system wide directory for these state files (in case the user's
home directories are encrypted), but in a system wide directory, the 'challenge' part should
be replaced with the username. Example : \fI/var/yubico/challenges/alice-123456\fR.
To use the system-wide mode, you currently have to move the generated state files manually and
configure the PAM module accordingly.
.SH EXAMPLE
First, program a YubiKey for challenge response on Slot 2 :
.HP
.nf
$ \fBykpersonalize \-2 \-ochal-resp \-ochal-hmac \-ohmac-lt64 \-oserial-api-visible\fR
...
Commit? (y/n) [n]: y
$
.fi
.HP
Now, set the current user to require this YubiKey for logon :
.HP
.nf
$ \fBykpamcfg \-2 \-v\fR
...
Stored initial challenge and expected response in '/home/alice/.yubico/challenge-123456'.
$
.fi
.HP
Then, configure authentication with PAM for example like this (\fImake a backup first\fR) :
.HP
\fI/etc/pam.d/common-auth\fR (from Ubuntu 10.10) :
.nf
auth required pam_unix.so nullok_secure try_first_pass
auth [success=1 new_authtok_reqd=ok ignore=ignore default=die] pam_yubico.so mode=challenge-response
auth requisite pam_deny.so
auth required pam_permit.so
auth optional pam_ecryptfs.so unwrap
.fi
.SH BUGS
Report ykpamcfg bugs in
.URL "http://code.google.com/p/yubico-pam/issues/list" "the issue tracker"
.SH "SEE ALSO"
The
.URL "http://code.google.com/p/yubico-pam/" "yubico-pam home page"
.PP
YubiKeys can be obtained from
.URL "http://www.yubico.com/" "Yubico" "."
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