.\" opiegen.1: Manual page for the opiegen(1) program.
.\"
.\" %%% portions-copyright-cmetz-96
.\" Portions of this software are Copyright 1996-1999 by Craig Metz, All Rights
.\" Reserved. The Inner Net License Version 2 applies to these portions of
.\" the software.
.\" You should have received a copy of the license with this software. If
.\" you didn't get a copy, you may request one from <license@inner.net>.
.\"
.\" Portions of this software are Copyright 1995 by Randall Atkinson and Dan
.\" McDonald, All Rights Reserved. All Rights under this copyright are assigned
.\" to the U.S. Naval Research Laboratory (NRL). The NRL Copyright Notice and
.\" License Agreement applies to this software.
.\"
.\"	History:
.\"
.\"	Modified by cmetz for OPIE 2.4. Fixed *roff bug.
.\"     Created by cmetz for OPIE 2.2 from opiekey.1.
.\"
.ll 6i
.pl 10.5i
.lt 6.0i
.TH OPIEKEY 1 "February 20, 1996"
.AT 3
.SH NAME
opiegen \- Example OPIE-based OTP generator

.SH SYNOPSIS
.B opiegen
.sp 0
[
.I challenge
]
.sp 0

.SH DESCRIPTION
.I opiegen
takes a properly formed OTP challenge either from the command line or from
standard input, prompts the user for a secret pass phrase, and generates an
OTP response to that challenge. It is intended as an example for programmers
of how a simple OTP generator can be built. Users should probably use the
.I opiekey
program instead.

.SH EXAMPLE
.sp 0
wintermute$ opiegen otp-md5 495 wi01309
.sp 0
Secret Pass Phrase:
.sp 0
GILL HUED GOES CHUM LIEU VAIN
.sp 0
wintermute$
.LP

.SH BUGS
.BR opiegen(1)
can lull a user into revealing his/her password when remotely logged in, thus
defeating the purpose of OPIE. This is especially a problem with xterm. 
.BR opiegen(1)
implements simple checks to reduce the risk of a user making
this mistake. Better checks are needed.
.LP

.SH SEE ALSO
.BR opiekey (1),
.BR opieserv (1),
.BR opie (4),
.BR opiepasswd (1),
.BR opieinfo (1),
.BR opiesu (1),
.BR opielogin (1),
.BR opieftpd (8),
.BR opiekeys (5),
.BR opieaccess (5)

.SH AUTHOR
The opiegen(1) program was created by Craig Metz for OPIE 2.2.

Bellcore's S/Key was written by Phil Karn, Neil M. Haller, and John S. Walden
of Bellcore. OPIE was created at NRL by Randall Atkinson, Dan McDonald, and
Craig Metz.

S/Key is a trademark of Bell Communications Research (Bellcore).

.SH CONTACT
OPIE is discussed on the Bellcore "S/Key Users" mailing list. To join,
send an email request to:
.sp
skey-users-request@thumper.bellcore.com