175 lines
4.9 KiB
Groff
175 lines
4.9 KiB
Groff
.\" opiekey.1: Manual page for the opiekey(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 2.3. Added -t documentation. Removed
|
|
.\" opie-bugs pointer. Removed opie-md5 and opie-md4 names. Fixed
|
|
.\" a bolding bug. Added -f flag. Added escapes on flags. Minor
|
|
.\" editorial changes. Updated example.
|
|
.\" Modified by cmetz for OPIE 2.2. Removed MJR DES documentation.
|
|
.\" Re-worded retype documentation. Added opiegen reference.
|
|
.\" Added -x documentation.
|
|
.\" Modified at NRL for OPIE 2.0.
|
|
.\" Written at Bellcore for the S/Key Version 1 software distribution
|
|
.\" (key.1).
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.ll 6i
|
|
.pl 10.5i
|
|
.lt 6.0i
|
|
.TH OPIEKEY 1 "February 20, 1996"
|
|
.AT 3
|
|
.SH NAME
|
|
opiekey, otp-md4, otp-md5 \- Programs for computing responses to OTP challenges.
|
|
|
|
.SH SYNOPSIS
|
|
.B opiekey
|
|
|
|
|
.B otp-md4
|
|
|
|
|
.B otp-md5
|
|
[\-v] [\-h] [\-f] [\-x]
|
|
.sp 0
|
|
[\-t
|
|
.I
|
|
type
|
|
] [\-4|\-5]
|
|
[\-a] [\-n
|
|
.I count
|
|
]
|
|
.I sequence_number seed
|
|
.sp 0
|
|
|
|
.SH DESCRIPTION
|
|
.I opiekey
|
|
takes the optional count of the number of responses to
|
|
print along with a (maximum) sequence number and seed as command line
|
|
args. It prompts for the user's secret pass phrase and produces an OPIE
|
|
response as six words. If compiled to do so, it can prompt for the user's
|
|
secret pass phrase twice to help reduce errors due to mistypes. The second
|
|
password entry can be circumvented by entering only an end of line.
|
|
.I opiekey
|
|
is downward compatible with the
|
|
.IR key (1)
|
|
program from the Bellcore S/Key Version 1 distribution and several of its
|
|
variants.
|
|
|
|
.SH OPTIONS
|
|
.TP
|
|
.B \-v
|
|
Display the version number and compile-time options, then exit.
|
|
.TP
|
|
.B \-h
|
|
Display a brief help message and exit.
|
|
.TP
|
|
.B \-4, \-5
|
|
Selects MD4 or MD5, respectively, as the response generation algorithm. The
|
|
default for otp-md4 is MD4 and the default for opie-md5 is MD5. The default
|
|
for opiekey depends on compile-time configuration, but should be MD5. MD4 is
|
|
compatible with the Bellcore S/Key Version 1 distribution.
|
|
.TP
|
|
.B \-f
|
|
Force
|
|
.I opiekey
|
|
to continue, even where it normally shouldn't. This is currently used to
|
|
force opiekey to operate in even from terminals it believes to be insecure.
|
|
It can also allow users to disclose their secret pass phrases to attackers.
|
|
Use of the -f flag may be disabled by compile-time option in your particular
|
|
build of OPIE.
|
|
.TP
|
|
.B \-a
|
|
Allows you to input an arbitrary secret pass phrase, instead of running checks
|
|
against it. Arbitrary currently does not include '\\0' or '\\n' characters. This
|
|
can be used for backwards compatibility with key generators that do not check
|
|
passwords.
|
|
.TP
|
|
.B \-n <count>
|
|
the number of one time access passwords to print.
|
|
The default is one.
|
|
.TP
|
|
.B \-x
|
|
Output the OTPs as hexadecimal numbers instead of six words.
|
|
.TP
|
|
.B \-t <type>
|
|
Generate an extended response of the specified type. Supported types are:
|
|
.sp 1
|
|
word six-word
|
|
.sp 0
|
|
hex hexadecimal
|
|
.sp 0
|
|
init hexadecimal re-initialization
|
|
.sp 0
|
|
init-word six-word re-initialization
|
|
.sp 1
|
|
The re-initialization responses
|
|
.I always
|
|
generate the simple active attack protection.
|
|
.TP
|
|
.SH EXAMPLE
|
|
.sp 0
|
|
wintermute$ opiekey \-5 \-n 5 495 wi01309
|
|
.sp 0
|
|
Using MD5 algorithm to compute response.
|
|
.sp 0
|
|
Reminder: Don't use opiekey from telnet or dial-in sessions.
|
|
.sp 0
|
|
Enter secret pass phrase:
|
|
.sp 0
|
|
491: HOST VET FOWL SEEK IOWA YAP
|
|
.sp 0
|
|
492: JOB ARTS WERE FEAT TILE IBIS
|
|
.sp 0
|
|
493: TRUE BRED JOEL USER HALT EBEN
|
|
.sp 0
|
|
494: HOOD WED MOLT PAN FED RUBY
|
|
.sp 0
|
|
495: SUB YAW BILE GLEE OWE NOR
|
|
.sp 0
|
|
wintermute$
|
|
.LP
|
|
|
|
.SH BUGS
|
|
.BR opiekey(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 opiekey(1)
|
|
implements simple checks to reduce the risk of a user making
|
|
this mistake. Better checks are needed.
|
|
.LP
|
|
|
|
.SH SEE ALSO
|
|
.BR ftpd (8),
|
|
.BR login (1),
|
|
.BR opie (4),
|
|
.BR opiepasswd (1),
|
|
.BR opieinfo (1),
|
|
.BR opiekeys (5),
|
|
.BR opieaccess (5),
|
|
.BR opiegen (1)
|
|
.BR su (1),
|
|
|
|
.SH AUTHOR
|
|
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
|