wifi-captive.command

#!/bin/zsh

SSID_FILE="ssids.txt"
MAC_ADDRESS_FILE="mac-address.txt"

declare -a ssid_array
declare -a mac_address_array
ssid=""
target_mac=""

# Argument $1: SSID
function disconnect_and_forget_network() 
{
    # Another option is to use "networksetup -setairportpower en0 on/off"
    sudo networksetup -setnetworkserviceenabled Wi-Fi off
    sudo networksetup -removepreferredwirelessnetwork en0 $1
    sudo networksetup -setnetworkserviceenabled Wi-Fi on
}

echo "Captive Portal MAC spoofing script 📶."
# Displaying current MAC address
current_mac=`ifconfig en0| grep ether | awk '{print $2}'`
echo "Current MAC address: $current_mac"
# Prompting user for disconnecting target device
echo "Please turn off or disconnect your target device and press enter to continue."
read

# Looking for file with SSIDs or creating it
if find "$SSID_FILE" -type f > /dev/null
then
    # Displaying previous stored SSIDs options
    echo "Previous stored SSIDs:"
    count=0
    while IFS= read -r line || [[ -n "$line" ]]; do
        # Add each line to an array
        value=$(echo $line)
        ssid_array+=("$value")
        # Print option
        count=$((count+1))
        echo "$count. $value"
    done < "$SSID_FILE"
    # Option for adding new SSID
    echo "0. Enter new SSID"
    # Prompting user for select SSID from stored
    echo "Select an option:"
    read ssid_option
    # Option validation
    while [[ $ssid_option -gt $count ]] || [[ $ssid_option -lt 0 ]] || [[ $ssid_option == "" ]]
    do
        echo "Invalid option. Please select a valid option."
        echo "Select an option:"
        read ssid_option
    done

    # If option is 0, prompt for new SSID
    if [[ $ssid_option -eq 0 ]]; then
        echo "Enter captive WiFi SSID:"
        read ssid
        if [[ $ssid == "" ]]; then
            echo "No SSID entered. Exiting."
            return ""
        fi
        echo "$ssid" >> "$SSID_FILE"
    # If option is not 0, return selected SSID
    else
        ssid=${ssid_array[$ssid_option]}
    fi
else
    echo "No previous stored SSIDs."
    # Prompting user for captive SSID
    echo "Enter captive WiFi SSID:"
    read ssid
    if [[ $ssid == "" ]]; then
        echo "No SSID entered. Exiting."
        return ""
    fi
    # Create file with SSID
    echo "$ssid" > "$SSID_FILE"
fi

# Disconnecting from WiFi
disconnect_and_forget_network "$ssid"
echo

if find "$MAC_ADDRESS_FILE" -type f > /dev/null
then
    # Displaying previous stored MAC Adresses options
    echo "Previous stored MAC Adresses:"
    count=0
    while IFS= read -r line || [[ -n "$line" ]]; do
        # Add each value to an array
        key=$(echo $line | cut -d "|" -f1)
        value=$(echo $line | cut -d "|" -f2)
        mac_address_array+=("$value")
        # Print option
        count=$((count+1))
        echo "$count. $key - $value"
    done < "$MAC_ADDRESS_FILE"
    # Option for adding new MAC Address
    echo "0. Enter new MAC Address"
    # Prompting user for select MAC Address from stored
    echo "Select an option:"
    read mac_addr_option
    # Option validation
    while [[ $mac_addr_option -gt $count ]] || [[ $mac_addr_option -lt 0 ]] || [[ $mac_addr_option == "" ]]
    do
        echo "Invalid option. Please select a valid option."
        echo "Select an option:"
        read mac_addr_option
    done

    # If option is 0, prompt for new MAC Address
    if [[ $mac_addr_option -eq 0 ]]; then
        echo "Enter device name:"
        read device_name
        if [[ $device_name == "" ]]; then
            echo "No device name entered. Exiting."
            return ""
        fi
        echo "Enter MAC Address:"
        read target_mac
        if [[ $target_mac == "" ]]; then
            echo "No device MAC address entered. Exiting."
            return ""
        fi
        echo "$device_name|$target_mac" >> "$MAC_ADDRESS_FILE"
    # If option is not 0, return selected MAC Adress
    else
        target_mac=${mac_address_array[$mac_addr_option]}
    fi
else
    echo "No previous stored MAC Addresses."
    # Prompting user for MAC Address
    echo "Enter device name:"
    read device_name
    if [[ $device_name == "" ]]; then
        echo "No device name entered. Exiting."
        return ""
    fi
    echo "Enter MAC Address:"
    read target_mac
    if [[ $target_mac == "" ]]; then
        echo "No device MAC address entered. Exiting."
        return ""
    fi
    echo "$device_name|$target_mac" >> "$MAC_ADDRESS_FILE"
fi

# Spoofing MAC address
sudo ifconfig en0 ether $target_mac
echo "New MAC address `ifconfig en0| grep ether | awk '{print $2}'`"
# Connecting to WiFi with new MAC address
echo "Connecting target device to $ssid..."
sudo networksetup -setairportnetwork en0 $ssid
echo "Fill information in captive site and press enter to continue."
open -a /Applications/Firefox.app
read
# Disconnecting from WiFi
disconnect_and_forget_network "$ssid"
# Restoring original MAC address
sudo ifconfig en0 ether $current_mac
echo "Original MAC address restored: `ifconfig en0| grep ether | awk '{print $2}'`"
echo "Press enter to continue."
read
# Restoring original WiFi connection
echo "Connecting current device to $ssid..."
sudo networksetup -setairportnetwork en0 $ssid
echo "Fill information in captive site and press enter to continue."
open -a /Applications/Firefox.app
read

echo "Done."