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passphrase generator using cmdline tools because wtf not
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#!/bin/bash | |
# | |
# simplistic program that creates passphrases using bash. the passphrases | |
# are a Number of '-' separated words, ea. of max Chars, with limited post | |
# processing (upper case, lower case, 1337.) | |
# | |
# (c) 2019, thaddeus t. grugq <the.grugq@gmail.com> | |
# | |
CRACKLIB=/usr/share/dict/cracklib-small | |
DICT=/usr/share/dict/words | |
lower() { | |
echo $1 | tr A-Z a-z | |
} | |
upper() { | |
echo $1 | tr a-z A-Z | |
} | |
l33t() { | |
echo "$1" | tr 'iletas' '1137@$' | |
} | |
qstrip() { | |
echo "$1" | sed -e "s/'//g" -e 's/"//g' | |
} | |
random_word() { | |
local n="$1" | |
local munge="${2:-l}" # l u e | |
local fname="$DICT" | |
local total=$( sed -E -n "/^.{1,$n}$/p" $fname | wc -l | awk '{ print $1 }') | |
while true | |
do | |
ndx=$RANDOM | |
if [[ "$total" -lt "$ndx" ]]; then | |
ndx=$(( $ndx % $total )) | |
fi | |
word=$(sed -E -n "/^.{1,$n}$/p" $fname | sed -n "${ndx}p") | |
case $munge in | |
"l"|"L") | |
word=$(lower "$word") | |
;; | |
"u"|"U") | |
word=$(upper "$word") | |
;; | |
"e"|"3") | |
word=$(l33t "$word") | |
word=$(lower "$word") | |
;; | |
*) | |
word=$(lower "$word") | |
;; | |
esac | |
break | |
done | |
echo "$(qstrip $word)" | |
} | |
gen_passphrase() { | |
local num="${1:-3}" | |
local len=${2:-5} | |
local sep="${3:--}" | |
local munge="${4:-l}" | |
words="" | |
for i in $(seq $num) | |
do | |
word=$(random_word $len $munge) | |
if [[ $i -eq 1 ]]; then | |
words="$word" | |
else | |
words="${words}${sep}$word" | |
fi | |
done | |
echo $words | |
} | |
usage() { | |
echo "ppw [-c|--chars N] [-n|--number N] [-l|--lower,-u|--upper,-e|--elite]" | |
echo " [-s|--sep C] [-k|--krack]" | |
echo "" | |
echo " -c,--chars max chars per word, default: 6" | |
echo " -n,--number number of words, default: 4" | |
echo " -l,--lower convert to lowercase {default}" | |
echo " -u,--upper convert to uppercase" | |
echo " -e,--elite convert to 1337" | |
echo " -s,--sep separator char, default: -" | |
echo " -k,--krack use cracklib, default /usr/share/dict/words" | |
echo "" | |
echo "example: " | |
echo " ppw -c 8 -n 4 -u -s @" | |
echo " JUNE@PIKE@PEABODY@FIORDS" | |
echo "" | |
echo " ppw -c 9 -n 8 " | |
echo " susanna-duncan-henrys-goethe-izaaks-abrams-degeneres-murdochs" | |
echo "" | |
echo " ppw -c 9 -n 5 -k " | |
echo " serviette-salver-notches-catchy-sheppard" | |
} | |
TEMP=$(getopt -o 'c:n:lues:kh' --long 'chars:,number:,lower,upper,elite,sep:,krack,help' -n 'ppw' -- "$@") | |
if [ $? -ne 0 ]; then | |
echo 'Terminating...' >&2 | |
exit 1 | |
fi | |
# | |
eval set -- "$TEMP" | |
unset TEMP | |
while true | |
do | |
case "$1" in | |
'-c'|'--chars') | |
chars=$2 | |
shift 2 | |
continue | |
;; | |
'-n'|'--number') | |
number=$2 | |
shift 2 | |
continue | |
;; | |
'-l'|'--lower') | |
munge="l" | |
shift | |
continue | |
;; | |
'-u'|'--upper') | |
munge="u" | |
shift | |
continue | |
;; | |
'-e'|'--elite') | |
munge="e" | |
shift | |
continue | |
;; | |
'-s'|'--sep') | |
sep=$2 | |
shift 2 | |
continue | |
;; | |
'-k'|'--krack') | |
DICT=$CRACKLIB | |
shift | |
continue | |
;; | |
'-h'|'--help') | |
usage | |
exit 1 | |
continue | |
;; | |
'--') | |
shift | |
break | |
;; | |
*) | |
echo 'Internal error!' >&2 | |
exit 1 | |
;; | |
esac | |
done | |
chars=${chars:-6} | |
number=${number:-4} | |
munge=${munge:-l} | |
sep=${sep:--} | |
gen_passphrase "$number" "$chars" "$sep" "$munge" |
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