#!/bin/bash

USERNAME=""
REALM=""
PASSWORD=""
METHOD="REGISTER"
DIGEST_URI=""
NONCE=""
EXPECTED=""

A1="${USERNAME}:${REALM}:${PASSWORD}"
HA1=$(printf "${A1}" | md5sum | awk '{print $1}')
A2="${METHOD}:${DIGEST_URI}"
HA2=$(printf "${A2}" | md5sum | awk '{print $1}')
RESULT=$(printf "${HA1}:${NONCE}:${HA2}" | md5sum | awk '{printf $1}')

echo "A1: ${A1}"
echo "HA1: ${HA1}"
echo "A2: ${A2}"
echo "HA2: ${HA2}"
echo ""
echo "${RESULT} (result)"
echo "${EXPECTED} (expected)"