LATCH reg file

#!/bin/bash
####Check procps package, requirement to execute this script
if  opkg list | grep procps > /dev/null
then
    echo 'Found procps'
else
    echo 'Updating package list...'
    opkg update > /dev/null
    echo 'Installing procps package...'
    opkg install procps > /dev/null
fi
####Check coreutils package, requirement to execute this script
if  opkg list | grep coreutils-base64 > /dev/null
then
    echo 'Found coreutils-base64'
else
    echo 'Updating package list...'
    opkg update > /dev/null
    echo 'Installing coreutils-base64 package...'
    opkg install coreutils-base64 > /dev/null
fi
####Check wget package, requirement to execute this script
if  opkg list | grep wget > /dev/null
then
    echo 'Found wget'
else
    echo 'Updating package list...'
    opkg update > /dev/null
    echo 'Installing wget...'
    opkg install wget > /dev/null
fi
####Check openssl-util package, requirement to execute this script
if  opkg list | grep openssl-util > /dev/null
then
    echo 'Found openssl-util'
else
    echo 'Updating package list...'
    opkg update > /dev/null
    echo 'Installing openssl-util package...'
    opkg install openssl-util > /dev/null

fi
####Check bash package, requirement to execute this script (please, check the version is not Shellshocked ;) )
if  opkg list | grep bash > /dev/null
then
    echo 'Found bash'
else
    echo 'Updating package list...'
    opkg update > /dev/null
    echo 'Installing bash package...'
    opkg install bash > /dev/null
fi
####End packages check...
if [ "$2" == "debug" ]; then set -x; fi
applicationId="INSERT app ID HERE"
secretkey="INSERT secret key HERE"
URL="/api/0.6/pair/$1"
LATCH="/root/home/latch.accounts"
if [ -z "$1" ]; then
 echo -e "\nUsage: SITE LATCH-REG <pair-key>\n"
 exit 0
fi
if [ `grep "^$USER:" $LATCH | wc -l` -ne 0 ]; then
 echo -e "\nAlready registered\n"
 exit 0
fi
requestSignature+="GET\n"
date=`date -u '+%Y-%m-%d %H:%M:%S'`
requestSignature+="$date\n\n$URL"
signed=`echo -en "$requestSignature" | openssl dgst -sha1 -hmac "$secretkey" -binary|sed -e 's|.*= \(.*\)|\1|g'`
b64signed=`echo -n "$signed"|base64`
auth_header="Authorization:11PATHS $applicationId $b64signed"
date_header="X-11Paths-Date: $date"
JSON=`wget -q --no-check-certificate -O - --header "$auth_header" --header "$date_header" "https://latch.elevenpaths.com$URL"`
accountid=`echo "$JSON" | sed -e 's|.*accountId":"\(.*\)"}.*|\1|'| sed -e 's|\(.*\)".*|\1|g'`

if [ -z $accountid ]; then
 echo "Error."
else
 echo "$USER:$accountid" >> $LATCH
 echo -e "\nDone.\n"
fi