nomad_pw

#!/usr/bin/env bash

# Set Script Name variable
SCRIPT=`basename ${BASH_SOURCE[0]}`

usage () {
  local ec=0
  local l_MSG=$1
  if [ "${l_MSG}" != "" ]; then
    echo "Usage Error: $l_MSG"
    ec=1
  fi
  echo "Usage: ${SCRIPT} <string>"
  echo '  where <string> specifies the human-readable password'
  echo ''
  echo 'Recognized optional environment variables'
  echo '  NOMAD_PW_SALT - Additional text to prepend to all input values. Useful'
  echo '                  to create novel outputs for the same input string.'
  echo '                  Defaults to "".'
  exit $ec
}

findMD5App () {
  cmd=$(which md5)
  if [ $? -eq 0 ]; then
    printf '%s' "${cmd}"
    exit 0
  fi
  cmd=$(which md5sum)
  if [ $? -eq 0 ]; then
    printf '%s' "${cmd}"
    exit 0
  fi
  echo 'ERROR: This command requires `md5` or `md5sum` on the path.'
  exit 1
}

MD5="$(findMD5App)"
uuid=$(printf "${NOMAD_PW_SALT}${1}" | ${MD5} | tr -d "\n\r")
printf "%s-%s-%s-%s-%s" ${uuid:0:8} ${uuid:8:4} ${uuid:12:4} ${uuid:16:4} ${uuid:20:12}