opiegen(1)

opiegen1

Example opie-based otp generator

Usage

opiegen

Overview

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.

Examples

wintermute$ opiegen otp-md5 495 wi01309

Secret Pass Phrase:

GILL HUED GOES CHUM LIEU VAIN

wintermute$

Contact

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

[email protected]

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)implementssimplecheckstoreducetheriskofausermaking this mistake. Better checks are needed.

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).

From opie 2.31-3 in Debian 2.0 (Hamm). Parsed by carta from the page's man source.