hashapass

#!/bin/bash
# hashapass.com based method for generating passwords
#
# Based on script by Simon Elmir
#

if ! args=$(getopt -o s -l silent -- "$@")
then
  exit 1
fi

while [ $# -gt 0  ]
do
  case $1 in
    -s|--silent) silent="yes" ;;
    -c|--copy) copy="yes" ;;
    -l|--length) lengtharg="$2" ; shift ;;
    (*) break;;
  esac
  shift
done

# Preserve whitespace
export IFS=""

# Length
length=${lengtharg:-"8"}

# Status
echo "Generating HMAC-SHA-1 with $length characters"
if [ $silent ]; then
  echo "- Not echo hash to terminal"
fi
if [ $copy ]; then
  echo "- Copy hash to system clipboard"
fi

read -rp "Parameter: " parameter
read -rsp "Master: " password
echo
hash=`echo -n "$parameter" \
| openssl dgst -sha1 -binary -hmac "$password" \
| openssl enc -base64 \
| cut -c 1-"$length"`
if ! [ $silent ]; then
  echo $hash
fi

if [ $copy ]; then
  echo -n $hash | pbcopy
fi