# -*- coding: utf-8 -*-
# Author: kelvinBen
# Github: https://github.com/kelvinBen/AppInfoScanner


import os
import re
import shutil
import zipfile
import binascii
import platform
from pathlib import Path
import libs.core as cores
from queue import Queue
from libs.core.parses import ParsesThreads


class iOSTask(object):
    elf_file_name = ""
    def __init__(self,path,no_resource):
        self.path = path
        self.no_resource = no_resource

        self.file_queue = Queue()
        self.shell_flag=False

    def start(self):
        file_path = self.path
        if file_path.split(".")[-1] == 'ipa':
            self.__decode_ipa__(cores.output_path)
            self.__scanner_file_by_ipa__(cores.output_path)
        elif self.__get_file_header__(file_path): 
            self.file_queue.put(file_path)
        else:
            raise Exception("Retrieval of this file type is not supported. Select IPA file or Mach-o file.")
        return {"shell_flag":self.shell_flag,"file_queue":self.file_queue,"comp_list":[],"packagename":None}

    def __get_file_header__(self,file_path):
        hex_hand = 0x0
        with open(file_path,"rb") as macho_file:
            macho_file.seek(hex_hand,0)
            magic = binascii.hexlify(macho_file.read(4)).decode().upper()
            macho_magics =  ["CFFAEDFE","CEFAEDFE","BEBAFECA","CAFEBABE"]
            if magic in macho_magics:
                self.__shell_test__(macho_file,hex_hand)
                macho_file.close()
                return True
            macho_file.close()
            return False
                
    
    def __shell_test__(self,macho_file,hex_hand):
        while True:
            magic = binascii.hexlify(macho_file.read(4)).decode().upper()
            if magic == "2C000000":
                macho_file.seek(hex_hand,0)
                encryption_info_command = binascii.hexlify(macho_file.read(24)).decode()
                cryptid = encryption_info_command[-8:len(encryption_info_command)]
                print(cryptid)
                if cryptid == "01000000":
                    self.shell_flag = True
                break
            hex_hand = hex_hand + 4            

    def __scanner_file_by_ipa__(self,output):   
        scanner_file_suffix = ["plist","js","xml","html"]
        scanner_dir =  os.path.join(output,"Payload")
        self.__get_scanner_file__(scanner_dir,scanner_file_suffix)

    def __get_scanner_file__(self,scanner_dir,file_suffix):
        dir_or_files = os.listdir(scanner_dir)
        for dir_file in dir_or_files:
            dir_file_path = os.path.join(scanner_dir,dir_file)
            if os.path.isdir(dir_file_path):
                if dir_file.endswith(".app"):
                    self.elf_file_name = dir_file.replace(".app","")
                self.__get_scanner_file__(dir_file_path,file_suffix)
            else:
                if self.elf_file_name == dir_file:
                    self.__get_file_header__(dir_file_path)
                    print(self.shell_flag)
                    self.file_queue.put(dir_file_path)
                    continue
                if self.no_resource:    
                    dir_file_suffix =  dir_file.split(".")
                    if len(dir_file_suffix) > 1:
                        if dir_file_suffix[-1] in file_suffix:
                            self.__get_file_header__(dir_file_path)
                            self.file_queue.put(dir_file_path)

    def __decode_ipa__(self,output_path):
        with zipfile.ZipFile(self.path,"r") as zip_files:
            zip_file_names = zip_files.namelist()
            zip_files.extract(zip_file_names[0],output_path)
            
            try:
                new_zip_file =  zip_file_names[0].encode('cp437').decode('utf-8')
            except UnicodeEncodeError:
                new_zip_file =  zip_file_names[0].encode('utf-8').decode('utf-8')
            
            old_zip_dir = self.__get_parse_dir__(output_path,zip_file_names[0])
            new_zip_dir = self.__get_parse_dir__(output_path,new_zip_file)
            os.rename(old_zip_dir,new_zip_dir)
            for zip_file in zip_file_names:
               
                old_ext_path = zip_files.extract(zip_file,output_path)
                start = str(old_ext_path).index("Payload")
                dir_path = old_ext_path[start:len(old_ext_path)]
                old_ext_path = os.path.join(output_path,dir_path)
                try:
                    new_zip_file = zip_file.encode('cp437').decode('utf-8')
                except UnicodeEncodeError:
                   new_zip_file = zip_file.encode('utf-8').decode('utf-8')
                
                new_ext_path = os.path.join(output_path,new_zip_file)

                if platform.system() == "Windows":
                    new_ext_path = new_ext_path.replace("/","\\")

                if not os.path.exists(new_ext_path):
                    dir_path = os.path.dirname(new_ext_path)
                    if not os.path.exists(dir_path):
                        os.makedirs(dir_path)
                shutil.move(old_ext_path, new_ext_path)


    def __get_parse_dir__(self,output_path,file_path):
        start = file_path.index("Payload/")
        end = file_path.index(".app")
        root_dir = file_path[start:end]
        if platform.system() == "Windows":
            root_dir = root_dir.replace("/","\\")
        old_root_dir = os.path.join(output_path,root_dir+".app")
        return old_root_dir