srun-auth.sh

# !/bin/bash
# annote: For authentication to Srun.
# author: Palm Civet
# github: git@github.com:Palmcivet/srun-auth.git

################################### customized variable #############################################
UA='user-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:76.0) Gecko/20100101 Firefox/76.0'
AP='10.1.254.72:803'
#####################################################################################################

encode_base() {
	TXT=$(echo "$1" | base64)
	RES=${TXT:0:$((${#TXT} - 4))}
	printf $RES
}

encode_url() {
	export LANG=C
	res=''
	arg="$1"
	i='0'
	while [ "$i" -lt ${#arg} ]; do
		c=${arg:$i:1}
		if echo "$c" | grep -q '[a-zA-Z0-9/:_\.\-]'; then
			printf $c
		elif [ "$c" = ' ' ]; then
			printf '+'
		else
			printf "%%%X" "'$c'"
		fi
		i=$((i+1))
	done
}

check_ip() {
    if [[ $1 =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then
        FIELD1=$(echo $1 | cut -d. -f 1)
        FIELD2=$(echo $1 | cut -d. -f 2)
        FIELD3=$(echo $1 | cut -d. -f 3)
        FIELD4=$(echo $1 | cut -d. -f 4)
        if [ $FIELD1 -le 255 -a $FIELD2 -le 255 -a $FIELD3 -le 255 -a $FIELD4 -le 255 ]; then
            return 0
        else
            return 1
        fi
    else
        return 1
    fi
}

login() {
	printf 'Logining...... '
	RES=$(curl -s --location \
	--request POST "http://${AP}/include/auth_action.php" \
	--header 'accept: */*' \
	--header 'accept-encoding: gzip, deflate' \
	--header 'accept-language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2' \
	--header 'content-length: 122' \
	--header 'content-type: application/x-www-form-urlencoded; charset=UTF-8' \
	--header 'connection: keep-alive' \
	--header 'cookie: language=en; optimizelyEndUserId=oeu1589792986493r0.4834943958572333; optimizelySegments=%7B%22173031668%22%3A%22direct%22%2C%22173358367%22%3A%22false%22%2C%22173387060%22%3A%22ff%22%7D; optimizelyBuckets=%7B%7D; AMCV_8D6C67C25245AF020A490D4C%40AdobeOrg=283337926%7CMCIDTS%7C18401%7CMCMID%7C28758766152708140933518197837924390054%7CMCAID%7CNONE; mbox=session#1589792986565-496581#1589796073|em-disabled#true#1589794792|check#true#1589794273; s_sess=%20v0%3DExternal%2520Websites%257C10.1.254.72%3B%20s_cc%3Dtrue%3B%20s_sq%3Dsalesforcedeskstage%253D%252526pid%25253DDESK%2525253A10%2525253Aus%2525253Asrun_portal_pcyd.php%252526pidt%25253D1%252526oid%25253D%252525E7%25252599%252525BB%252525E9%25252599%25252586%252526oidt%25253D3%252526ot%25253DSUBMIT%3B; optimizelyPendingLogEvents=%5B%22n%3Dengagement%26u%3Doeu1589792986493r0.4834943958572333%26wxhr%3Dtrue%26time%3D1589794215.751%26f%3D3417450523%2C3478260568%2C3481252022%2C3735817878%26g%3D109615771%22%2C%22n%3Dhttp%253A%252F%252F10.1.254.72%253A803%252Fsrun_portal_pcyd.php%253Fac_id%253D2%2526wlanuserip%253D"${IP}"%2526wlanacname%253D%2526wlanuserfirsturl%253D%26u%3Doeu1589792986493r0.4834943958572333%26wxhr%3Dtrue%26time%3D1589794212.864%26f%3D3417450523%2C3478260568%2C3481252022%2C3735817878%26g%3D%22%5D' \
	--header 'x-requested-with: XMLHttpRequest' \
	--header 'dnt: 1' \
	--header "${UA}" \
	--header "host: ${AP}" \
	--header "origin: http://${AP}" \
	--header "referer: http://${AP}/srun_portal_pcyd.php?ac_id=2&wlanuserip=${3}&wlanacname=&wlanuserfirsturl=" \
	--data-raw "action=login&username=${1}&password={B}${2}&ac_id=2&user_ip=${3}&nas_ip=&user_mac=&save_me=1&ajax=1")

	if [ "${RES:0:8}" = 'login_ok' ]; then
		echo 'Login success'
	else
		echo 'Login failed'
		echo "${RES}"
	fi
}

# detect curl && base64
hash curl 2>/dev/null || { echo >&2 "Can't find curl"; exit 1; }
hash base64 2>/dev/null || { echo >&2 "Can't find base64"; exit 1; }

# detect ifconfig || ip
if hash ifconfig; then
	SHOW="ifconfig"
elif  hash ip; then
	SHOW="ip a"
else
	echo "Can't find ifconfig or ip"
	exit 1
fi

# parse options
while getopts 'u:p:h' opt
do
    case $opt in
        u)
            USER=$OPTARG
            ;;
        p)
            PASS=`encode_url "\`encode_base "$OPTARG"\`"`
            ;;
        h)
			echo 'Srun-auth - A CLI for authentication to srun.

Options:
  -u username
  -p password
  -h help

Usage:
  ./srun-auth.sh -u yourName -p yourPass [IP]'
            exit 1
            ;;
		?)
            exit 1
            ;;
    esac
done

# check arguments
if test -z "$USER" || test -z "$PASS"; then
    echo "Usage: ./srun-auth.sh -u yourName -p yourPass [IP]"
    echo "try -h for more help"
    exit 1
else
    shift $(($OPTIND - 1))
    IP=$1
    # IP isn't empty
    if test -n "$IP"; then
        check_ip $IP
        if [[ $? != 0 ]]; then
            echo "Invalid IP: ${IP}"
            exit 1
        fi
    # IP is empty
    else
		OPTION=`"$SHOW" | grep 'inet' | grep -v '127.0.0.1' | cut -d : -f 2 | awk '{print $2}' | sed -e '/^$/d'`
		echo "$OPTION" | nl
		EDGE=`echo "$OPTION" | awk 'END{print NR}'`

		read -p "Select IP(1-${EDGE}):" INDEX
		if [[ $INDEX -le $EDGE ]]; then
			IP=`echo "$OPTION" | sed -n "$INDEX"p`
		else
			echo "Invalid number"
			exit 1
		fi
    fi
	login $USER $PASS $IP
fi