NAME¶

opiegen - Example OPIE-based OTP generator

SYNOPSIS¶

opiegen

[ challenge ]

DESCRIPTION¶

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 opiekey program instead.

EXAMPLE¶

wintermute$ opiegen otp-md5 495 wi01309

Secret Pass Phrase:

GILL HUED GOES CHUM LIEU VAIN

wintermute$

BUGS¶

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. opiegen(1) implements simple checks to reduce the risk of a user making this mistake. Better checks are needed.

SEE ALSO¶

opiekey(1), opieserv(1), opie(4), opiepasswd(1), opieinfo(1), opiesu(1), opielogin(1), opieftpd(8), opiekeys(5), opieaccess(5)

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).

CONTACT¶

OPIE is discussed on the Bellcore "S/Key Users" mailing list. To join, send an email request to:

skey-users-request@thumper.bellcore.com