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January 5, 2025 00:46
Command line random password generator
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#!/usr/bin/env bash | |
set -eo pipefail | |
# Ref: https://theworld.com/~reinhold/diceware.html | |
# Ref: https://www.eff.org/deeplinks/2016/07/new-wordlists-random-passphrases | |
if [[ ! -x "$(command -v curl)" ]]; then | |
echo "Please install curl" | |
exit 1 | |
fi | |
if [[ ! -x "$(command -v shuf)" ]]; then | |
echo "Please install coreutils" | |
exit 1 | |
fi | |
if [[ ! -x "$(command -v gum)" ]]; then | |
echo "Please install https://github.com/charmbracelet/gum" | |
exit 1 | |
fi | |
opt_five='five dice, long wordlist' | |
url_five='https://www.eff.org/files/2016/07/18/eff_large_wordlist.txt' | |
dst_five='eff_large_wordlist.txt' | |
opt_four_short='four dice, short wordlist' | |
url_four_short='https://www.eff.org/files/2016/09/08/eff_short_wordlist_1.txt' | |
dst_four_short='eff_short_wordlist_1.txt' | |
opt_four_long='four dice, long wordlist' | |
url_four_long='https://www.eff.org/files/2016/09/08/eff_short_wordlist_2_0.txt' | |
dst_four_long='eff_short_wordlist_2_0.txt' | |
echo 'Which wordlist to use?' | |
WORDLIST=$(gum choose "$opt_five" "$opt_four_short" "$opt_four_long") | |
echo ">> $WORDLIST" | |
echo 'How many words to pick?' | |
COUNT=$(gum input --value='4') | |
echo ">> $COUNT" | |
echo 'Which word separator to use?' | |
SEPARATOR=$(gum choose 'dash' 'space' 'underscore') | |
echo ">> $SEPARATOR" | |
CACHE_DIR="${HOME}/.diceware" | |
if [[ ! -d "$CACHE_DIR" ]]; then | |
mkdir "$CACHE_DIR" | |
fi | |
word_src="$url_five" | |
word_file="${dst_five}" | |
if [[ "$WORDLIST" == "$opt_four_short" ]]; then | |
word_src="$url_four_short" | |
word_file="$dst_four_short" | |
fi | |
if [[ "$WORDLIST" == "$opt_four_long" ]]; then | |
word_src="$url_four_long" | |
word_file="$dst_four_long" | |
fi | |
word_file="${CACHE_DIR}/${word_file}" | |
if [[ ! -f "$word_file" ]]; then | |
curl -sSf "$word_src" -o "$word_file" | |
fi | |
dice='4' | |
if [[ "$WORDLIST" == "$opt_five" ]]; then | |
dice='5' | |
fi | |
separator=' ' | |
if [[ "$SEPARATOR" == "dash" ]]; then | |
separator='-' | |
elif [[ "$SEPARATOR" == "underscore" ]]; then | |
separator='_' | |
fi | |
phrase='' | |
for i in $(seq "$COUNT"); do | |
group='' | |
for j in $(seq "$dice"); do | |
roll=$(shuf -i 1-6 -n 1 --random-source=/dev/random) | |
if [[ -z "$group" ]]; then | |
group="$roll" | |
else | |
group="${group}${roll}" | |
fi | |
done | |
word=$(grep "$group" "$word_file" | awk '{print $2}') | |
if [[ -z "$phrase" ]]; then | |
phrase="$word" | |
else | |
phrase="${phrase}${separator}${word}" | |
fi | |
done | |
gum style \ | |
--border double --align center \ | |
--margin '1 2' --padding '2 4' \ | |
"$phrase" |
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