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March 14, 2018 23:07
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Check password against pwnedpasswords repo.
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#!/bin/bash | |
# Original: | |
# https://blog.cloudflare.com/validating-leaked-passwords-with-k-anonymity | |
echo -n Password: | |
read -s password | |
echo | |
hash="$(echo -n $password | openssl dgst -sha1 -binary | xxd -p)" | |
upperCase="$(echo $hash | tr '[a-z]' '[A-Z]')" | |
prefix="${upperCase:0:5}" | |
response=$(curl -s https://api.pwnedpasswords.com/range/$prefix) | |
while read -r line; do | |
lineOriginal="$prefix$line" | |
if [ "${lineOriginal:0:40}" == "$upperCase" ]; then | |
howmany=$(echo $lineOriginal | cut -d":" -f2 | tr -d "\n\r") | |
echo "Password breached $howmany times!" | |
exit 1 | |
fi | |
done <<< "$response" | |
echo "Password not found in breached database." | |
exit 0 |
Changed the openssl oneliner to support modern versions.
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See https://www.troyhunt.com/ive-just-launched-pwned-passwords-version-2/