Securely check passwords against https://haveibeenpwned.com/ DB.

pwnd

#!/bin/bash

while read -sp Password: password; do
	echo

	sha1=$(printf "$password" | sha1sum -)
	range=$(echo $sha1 | cut -b1-5)
	rest=$(echo $sha1 | cut -b6-40 | tr 'a-f' 'A-F')
	part2=$(echo $rest | cut -b1-8)

	result=$(curl -s "https://api.pwnedpasswords.com/range/$range" | grep ^$part2)
	echo $rest
	echo $result
done