opiepasswd - Change or set a user's password for the OPIE authentication system.
opiepasswd [-v] [-h] [-c|-d] [-f]
[-n initial_sequence_number ] [-s seed ] [
opiepasswd will initialize the system information to allow one to use
OPIE to login. opiepasswd is downward compatible with the keyinit(1)
program from the Bellcore S/Key Version 1 distribution.
Using opiepasswd from the console:
- Display the version number and compile-time options, then exit.
- Display a brief help message and exit.
- Set console mode where the user is expected to have secure access to the
system. In console mode, you will be asked to input your password directly
instead of having to use an OPIE calculator. If you do not have secure
access to the system (i.e., you are not on the system's console), you are
volunteering your password to attackers by using this mode.
- Disable OTP logins to the specified account.
- Force opiepasswd to continue, even where it normally shouldn't.
This is currently used to force opiepasswd to operate in
"console" mode 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.
- Manually specify the initial sequence number. The default is 499.
- Specify a non-random seed. The default is to generate a "random"
seed using the first two characters of the host name and five
wintermute$ opiepasswd -c
Reminder - Only use this method from the console; NEVER from
remote. If you
are using telnet, xterm, or a dial-in, type ^C now or exit with no
Then run opiepasswd without the -c parameter.
Using MD5 to compute responses.
Enter old secret pass phrase:
Enter new secret pass phrase:
Again new secret pass phrase:
ID kebe OPIE key is 499 be93564
CITE JAN GORY BELA GET ABED
Using opiepasswd from remote:
Reminder: You need the response from your OPIE calculator.
Old secret password:
otp-md5 482 wi93563
Response: FIRM BERN THEE DUCK MANN AWAY
New secret password:
otp-md5 499 wi93564
Response: SKY FAN BUG HUFF GUS BEAT
ID kebe OPIE key is 499 wi93564
SKY FAN BUG HUFF GUS BEAT
ftpd(8), login(1), passwd(1), opie(4),
opiekey(1), opieinfo(1), su(1), opiekeys(5),
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
- /etc/opiekeys -- database of key information for the OPIE system.
S/Key is a trademark of Bell Communications Research
OPIE is discussed on the Bellcore "S/Key Users" mailing list. To join,
send an email request to: