#!/usr/bin/env python

# This file is part of Androguard.
#
# Copyright (C) 2012, Anthony Desnos <desnos at t0t0.fr>
# All rights reserved.
#
# Androguard is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Androguard is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with Androguard.  If not, see <http://www.gnu.org/licenses/>.

import sys
import os

from optparse import OptionParser

from androguard.core import androconf
from androguard.core.bytecodes import apk
from androguard.util import read

sys.path.append("./elsim/")
from elsim.elsign import dalvik_elsign


option_0 = {'name': ('-i', '--input'),
            'help': 'file : use this filename', 'nargs': 1}
option_1 = {'name': ('-d', '--directory'),
            'help': 'directory : use this directory', 'nargs': 1}
option_2 = {'name': ('-b', '--database'),
            'help': 'database : use this database', 'nargs': 1}
option_3 = {'name': ('-c', '--config'),
            'help': 'use this configuration', 'nargs': 1}
option_4 = {'name': ('-v', '--verbose'),
            'help': 'display debug information', 'action': 'count'}

options = [option_0, option_1, option_2, option_3, option_4]


def display(ret, debug):
    print("---->", ret[0])
    sys.stdout.flush()


def main(options, arguments):
    if options.database == None or options.config == None:
        return

    s = dalvik_elsign.MSignature(options.database, options.config,
                                 options.verbose != None, ps=dalvik_elsign.PublicSignature)

    if options.input != None:
        ret_type = androconf.is_android(options.input)

        print(os.path.basename(options.input), ":", end=' ')
        sys.stdout.flush()
        if ret_type == "APK":
            try:
                a = apk.APK(options.input)
                if a.is_valid_APK():
                    display(s.check_apk(a), options.verbose)
                else:
                    print("INVALID")
            except Exception as e:
                print("ERROR", e)

        elif ret_type == "DEX":
            display(s.check_dex(read(options.input)), options.verbose)
    elif options.directory != None:
        for root, dirs, files in os.walk(options.directory, followlinks=True):
            if files != []:
                for f in files:
                    real_filename = root
                    if real_filename[-1] != "/":
                        real_filename += "/"
                    real_filename += f

                    ret_type = androconf.is_android(real_filename)
                    if ret_type == "APK":
                        print(os.path.basename(real_filename), ":", end=' ')
                        sys.stdout.flush()
                        try:
                            a = apk.APK(real_filename)
                            if a.is_valid_APK():
                                display(s.check_apk(a), options.verbose)
                            else:
                                print("INVALID APK")
                        except Exception as e:
                            print("ERROR", e)
                    elif ret_type == "DEX":
                        try:
                            print(os.path.basename(real_filename), ":", end=' ')
                            sys.stdout.flush()
                            display(s.check_dex(read(real_filename)),
                                    options.verbose)
                        except Exception as e:
                            print("ERROR", e)

    elif options.version != None:
        print("Androsign version %s" % androconf.ANDROGUARD_VERSION)

if __name__ == "__main__":
    parser = OptionParser()
    for option in options:
        param = option['name']
        del option['name']
        parser.add_option(*param, **option)

    options, arguments = parser.parse_args()
    sys.argv[:] = arguments
    main(options, arguments)
