man donkey (Commandes) - alternative for S/KEY's "key" command.
NAME
donkey - alternative for S/KEY's "key" command.
SYNOPSIS
donkey
[options] sequence seed
donkey
-i
key
[option] sequence seed
key
-i
DESCRIPTION
This manual page documents briefly the donkey, and key commands. This manual page was written for the Debian GNU/Linux distribution because the original program does not have a manual page. Instead, it has documentation in /usr/share/doc/donkey
donkey is an alternative for S/KEY's "key" command. The new feature that the original key doesn't have is print an entry for skeykeys as follows;
kazu 0099 al02004 115d83956f1089b6 Apr 26,1995 22:13:27
This means that donkey is also an alternative for "keyinit". Since the entry is printed to stdout (not to /etc/skeykeys), you can easily sent it to remote operator by e-mail (with PGP signature or something). So, it possible to initiate S/KEY without login from the console of the host.
OPTIONS
A summary of options are included below.
- -n
- num specify number of keys to be calculated.
- -f
- func choose hash function from MD2 , MD4 , and MD5
EXAMPLES
(1) Calculate an One-Time-Password.
Execute Donkey with sequence and seed, then input your passphrase.
% donkey 80 is12345 Enter passphrase : xxxxxxxxxxxxxxxxxxxxxxx SOFT O SAW SWAB CON RODE
You can choose hash function from MD2, MD4, and MD5.
% donkey 80 is12345 Enter passphrase : xxxxxxxxxxxxxxxxxxxxxxx SOFT O SAW SWAB CON RODE
%donkey -f md5 80 is12345 Enter passphrase : xxxxxxxxxxxxxxxxxxxxxxx LACK WIN ROSE ANNA STUN REEK
The default hash function is MD4 due to the historical reason.
(2) Calculate some One-Time-Passwords at once.
Use -n option.
% donkey -n 10 80 is12345 Enter passphrase : xxxxxxxxxxxxxxxxxxxxxxx 71: WORE HELL CUB FAR DORA MALE 72: SAIL DAN DONE BEER DAYS MOS 73: PAN TONE THAT TOUT BURY EST 74: KEN ROAM HEAT NAN MEAN HEN 75: MINI MARS HASH BOTH SITU SING 76: TOW SHIN FLUE ARID AHOY NE 77: SLID LEEK NO TREE STOW BEY 78: RUDY WINE GIFT FUSS AGEE SUE 79: GELD THIN MAID THIN BUD TURF 80: SOFT O SAW SWAB CON RODE
Note that though "Enter passphrase" is printed out to stderr, One-Time-Passwords is to stdout. So, you can redirect the output safely.
(3) Print skeykeys entry.
Use -i option without argments. Then, enter login name, sequence and seed. If you like default value, just type RET. Input your passphrase twice to get the entry.
% donkey -i Enter login name [default kazu]: Enter sequence 1 to 999 [default 99]: Enter new seed [default ur18122]: Please choose passphrase between 8 and 256 characters. Enter passphrase : xxxxxxxxxxxxxxxxxxxxxxxxxxx Re-enter passphrase : xxxxxxxxxxxxxxxxxxxxxxxxxxx kazu 0099 ur18122 fc5b023e684968ff Oct 02,1995 16:15:30 WINK SEAM GRAB ROAD HELL FEST
BUGS
Things to do:
- Support other one time passwords such as OTP.
- Support other secure hash functions.
AUTHOR
This program is developed by Kazuhiko Yamamoto <kazu@is.aist-nara.ac.jp>. This manual page was written by Fumitoshi UKAI <ukai@debian.or.jp>, based on documents of this program, for the Debian GNU/Linux system (but may be used by others).