mac_chang.py

# #!/usr/bin/env python

import subprocess  # Subprocess library
import optparse
import re


def get_arguments():
    parser = optparse.OptionParser()  # OptionParser class
    parser.add_option("-i", "--interface", dest="interface", help="Interface to change its MAC address")
    parser.add_option("-m", "--mac", dest="new_mac", help="New MAC address")
    (options, arguments) =  parser.parse_args()
    if not options.interface:
        parser.error("[-] Please specify an interface, use --help for more info")
    elif not options.new_mac:
        parser.error("[-] Please specify an new mac, use --help for more info")
    return options


def change_mac(interface, new_mac):
    print("[+] Changing MAC address for " + interface + " to " + new_mac)
    subprocess.call(["ifconfig", interface, "down"])  # SECOND WAY OF CALLING SUBPROCESS, MORE SECURE
    subprocess.call(["ifconfig", interface, "hw", "ether", new_mac])
    subprocess.call(["ifconfig", interface, "up"])


def get_current_mac(interface):
    ifconfig_result = subprocess.check_output(["ifconfig", interface]).decode()

    mac_address_search_result = re.search(r"([0-9a-fA-F]{2}:){5}[0-9a-fA-F]{2}", ifconfig_result)

    if mac_address_search_result:
        return mac_address_search_result.group(0)
    else:
        print("[-] Could not read mac address")

options = get_arguments()
# (options, arguments) = get_arguments()


current_mac = get_current_mac(options.interface)
print('Current_mac = ', str(current_mac))
change_mac(options.interface, options.new_mac)

current_mac = get_current_mac(options.interface)
if(current_mac) == options.new_mac:
    print('[+] MAC address was successfully changed to ', current_mac)
else:
    print('[-] MAC address did not get changed')














# interface = "eth0" # Variables help make code shorter and easy to edit
# interface = raw_input("Interface > ") # function is used in python 2.7

# interface = options.interface
# new_mac = options.new_mac # Changing variable once changes its value everywhere

# subprocess.call("ifconfig "+ interface +" down", shell=True) # Security issue, check doc for more info
# subprocess.call("ifconfig "+ interface +" hw ether " + new_mac, shell=True)
# subprocess.call("ifconfig "+ interface +" up", shell=True)

# Algorithm to check if program/script worked from ifconfig
# Execute and read ifconfig
# Read the mac address from output - using re module
# Check if MAC in ifconfig is changed
# Print Affirmation