Bash version

pwned.sh

@@ -0,0 +1,41 @@
+#!/bin/bash
+# FAIR License, Copyright (c) 2019 72Zn
+# Usage of the works is permitted provided that this instrument is retained
+# with the works, so that any entity that uses the works is notified of this
+# instrument.  
+# DISCLAIMER: THE WORKS ARE WITHOUT WARRANTY.
+
+# usage examples:
+#	./pwned.sh [pw1] [pw2] ...
+#	./pwned.sh < <file_with_passwords>
+#	echo pw | ./pwned.sh
+
+PWNAPI="https://api.pwnedpasswords.com/range"
+
+lookup_pwned_api() {
+	local pass="$1"
+	local pwhash=$(printf "%s" "$pass" | sha1sum | cut -d" " -f1)
+	local curlrv="$(curl -s "$PWNAPI"/"${pwhash:0:5}")"
+	[ -z "$curlrv" ] && echo "$pass could not be checked" && return
+	local result="$(echo "$curlrv" | grep -i "${pwhash:5:35}")"
+
+	if [ -n "$result" ]; then
+		local occ="$(printf "%s" "${result}" | cut -d: -f2 | sed 's/[^0-9]*//g')"
+		printf "%s was found with %s occurances (hash: %s)\n" "$pass" "$occ" "$pwhash"
+	else
+		printf "%s was not found\n" "$pass"
+	fi
+}
+
+if [ "$#" -lt 1 ]; then
+	# read from file or stdin
+	while read -r pw; do
+		lookup_pwned_api $pw
+	done
+else
+	# read arguments
+	for pw in "$@"; do
+		lookup_pwned_api $pw
+	done
+fi
+