PW> Apparently I need to "purchase an inexpensive OATH TOTP compatible
PW> token device."
Here's another "thumbs-up" for the pkg "oath-toolkit".
I drive its oathtool(1) with a simple, rwx------ shell wrapper which
collects my personal seed secrets and tells me both the current and
upcoming TOTP, syncing on the HH:MM:{00,30} switch-overs.
(With an intentional off-by-one, cannot remember why I preferred
it that way, though. The sample seeds below are not the real thing
-- no worries.)
Oh: exit the loop with Ctrl-C.
Martin Neitzel
#!/bin/sh
case "$1" in
-h*|-hzi) secret=LDCKNdVBUJUWMCDBCDOKQSDLC ;;
-g*|-github) secret=KMSXBBSPVOFBWCKX ;;
-m*|-microsoft) secret=sxok3dck8skxn9sx ;;
-o*|-oci) secret="SLODCNCDJNCDJBDCJBDCJBSXNI" ;;
-*) echo "$1: no such option" 1>&2 ; exit 1 ;;
?*) secret=$1 ;;
"") echo "usage: $0 [ -h | -m | -g | -o | <SECRET> ]"
exit 1
;;
esac
trap "exit 0" INT
while true; do
t=`date +%S`
date +"%T, current & next token (changes on seconds :00 and :30):"
oathtool --totp -w1 -b $secret
# gotcha! $t may come as 08 or 09 which would be illegal octal
# numbers -- so we need to nuke a leading "0":
sleep $(( 1 + 30 - (${t#0} % 30) ))
done
