前言

相信最近在App上架應用商店的同學都感受到了惹盼，國內(nèi)對用戶的隱私越來越重視春瞬，如MAC地址，設備ID鸭津，IMEI信息等彤侍，要么就干脆不用，要么就必須很明顯的告訴用戶想要獲取這些信息逆趋，相關法律及規(guī)定盏阶，參考《網(wǎng)絡安全法》及《關于開展APP侵害用戶權益專項整治工作的通知》

開門見山

廢話不多說，找了幾個反編譯工具父泳，并簡單看了下使用方法般哼，最終鎖定androguard，官方解釋：對Android應用程序的逆向工程惠窄、惡意軟件和惡意軟件分析蒸眠，它提供了一系列的Apk以及dex、odex杆融、arsc等文件的分析處理功能楞卡，可以輕松的幫助我們找到調(diào)用系統(tǒng)權限的地方。且python腳本執(zhí)行脾歇，簡直不能再好用了

環(huán)境

• python

https://www.python.org

• pycharm

https://www.jetbrains.com/pycharm/download/

• androguard

https://androguard.readthedocs.io/en/latest/

安裝

pip install -U androguard

如果想在命令行直接操作蒋腮，請在安裝完后執(zhí)行如下：

androguard analyze

執(zhí)行后如圖：

CleanShot 2021-07-15 at 17.20.24@2x.png

然后再加載apk，在上面執(zhí)行后藕各，輸入如下：

a, d, dx = AnalyzeAPK("examples/android/abcore/app-prod-debug.apk")

apk加載完成后就可以調(diào)用相關api來獲取信息

獲取權限

In [2]: a.get_permissions()
Out[2]:
['android.permission.INTERNET',
 'android.permission.WRITE_EXTERNAL_STORAGE',
 'android.permission.ACCESS_WIFI_STATE',
 'android.permission.ACCESS_NETWORK_STATE']

獲取Activity

In [3]: a.get_activities()
Out[3]:
['com.greenaddress.abcore.MainActivity',
 'com.greenaddress.abcore.BitcoinConfEditActivity',
 'com.greenaddress.abcore.AboutActivity',
 'com.greenaddress.abcore.SettingsActivity',
 'com.greenaddress.abcore.DownloadSettingsActivity',
 'com.greenaddress.abcore.PeerActivity',
 'com.greenaddress.abcore.ProgressActivity',
 'com.greenaddress.abcore.LogActivity',
 'com.greenaddress.abcore.ConsoleActivity',
 'com.greenaddress.abcore.DownloadActivity']

其他

# 包名
In [4]: a.get_package()
Out[4]: 'com.greenaddress.abcore'
# app名字
In [5]: a.get_app_name()
Out[5]: u'ABCore'
# logo
In [6]: a.get_app_icon()
Out[6]: u'res/mipmap-xxxhdpi-v4/ic_launcher.png'
# 版本號
In [7]: a.get_androidversion_code()
Out[7]: '2162'
# 版本名
In [8]: a.get_androidversion_name()
Out[8]: '0.62'
# 最低sdk支持
In [9]: a.get_min_sdk_version()
Out[9]: '21'
# 最高
In [10]: a.get_max_sdk_version()
# 目標版本
In [11]: a.get_target_sdk_version()
Out[11]: '27'
# 獲取有效目標版本
In [12]: a.get_effective_target_sdk_version()
Out[12]: 27
# manifest文件
In [13]: a.get_android_manifest_xml()
Out[13]: <Element manifest at 0x7f9d01587b00>

等等吧池摧，Api實在是太多了，還是關注官方文檔吧激况，只有你想不到作彤，沒有它沒有的膘魄，如下鏈接：

https://androguard.readthedocs.io/en/latest/intro/gettingstarted.html#using-the-analysis-object

更多demo

https://github.com/androguard/androguard/tree/master/examples

下面直接開始實踐。

檢索使用敏感權限的地方并輸出文件

下面就是檢查APK中使用敏感權限的實現(xiàn)竭讳，請看：

import os
import sys

# 引入androguard的路徑创葡，根據(jù)個人存放的位置而定
androguard_module_path = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'androguard')
if not androguard_module_path in sys.path:
    sys.path.append(androguard_module_path)

from androguard.misc import AnalyzeAPK
from androguard.core.androconf import load_api_specific_resource_module

path = r"/apk"
out_path = r"/out"
files = []
path_list = os.listdir(path)
path_list.sort()
for name in path_list:
    if os.path.isfile(os.path.join(path, name)):
        files.append(name)


def main():
    for apkFile in files:
        file_name = os.path.splitext(apkFile)[0]
        print(apkFile)
        out = AnalyzeAPK(path + '/' + apkFile)
        # apk object 抽象apk對象，可以獲取apk的一些信息绢慢，如版本號灿渴、包名、Activity等
        a = out[0]
        # DalvikVMFormat 數(shù)組胰舆，一個元素其實對應的是class.dex骚露，可以從DEX文件中獲取類、方法或字符串思瘟。
        d = out[1]
        # Analysis 分析對象荸百，因為它包含特殊的類，這些類鏈接有關classes.dex的信息滨攻，甚至可以一次處理許多dex文件够话，所以下面我們從這里面來分析整個apk
        dx = out[2]

        # api和權限映射
        # 輸出文件路徑
        api_perm_filename = os.path.join(out_path, file_name + "_api-perm.txt")
        api_perm_file = open(api_perm_filename, 'w', encoding='utf-8')
        # 權限映射map
        permissionMap = load_api_specific_resource_module('api_permission_mappings')
        # 遍歷apk所有方法
        for meth_analysis in dx.get_methods():
            meth = meth_analysis.get_method()
            # 獲取類名、方法名
            name = meth.get_class_name() + "-" + meth.get_name() + "-" + str(
                meth.get_descriptor())
             
            for k, v in permissionMap.items():
                # 匹配系統(tǒng)權限方法光绕，匹配上就輸出到文件中
                if name == k:
                    result = str(meth) + ' : ' + str(v)
                    api_perm_file.write(result + '\n')
        api_perm_file.close()


if __name__ == '__main__':
    main()

輸出結果

Landroid/app/Activity;->navigateUpTo(Landroid/content/Intent;)Z : ['android.permission.BROADCAST_STICKY']
Landroid/app/Activity;->onMenuItemSelected(I Landroid/view/MenuItem;)Z : ['android.permission.BROADCAST_STICKY']
Landroid/app/Activity;->setRequestedOrientation(I)V : ['android.permission.BROADCAST_STICKY']
Landroid/app/Activity;->unregisterReceiver(Landroid/content/BroadcastReceiver;)V : ['android.permission.BROADCAST_STICKY']
Landroid/os/PowerManager$WakeLock;->acquire(J)V : ['android.permission.WAKE_LOCK']
Landroid/os/PowerManager$WakeLock;->release()V : ['android.permission.WAKE_LOCK']
Landroid/location/LocationManager;->isProviderEnabled(Ljava/lang/String;)Z : ['android.permission.ACCESS_COARSE_LOCATION', 'android.permission.ACCESS_FINE_LOCATION']
Landroid/location/LocationManager;->getLastKnownLocation(Ljava/lang/String;)Landroid/location/Location; : ['android.permission.ACCESS_COARSE_LOCATION', 'android.permission.ACCESS_FINE_LOCATION']
Landroid/app/ActivityManager;->getRunningTasks(I)Ljava/util/List; : ['android.permission.GET_TASKS']
Landroid/accounts/AccountManager;->invalidateAuthToken(Ljava/lang/String; Ljava/lang/String;)V : ['android.permission.MANAGE_ACCOUNTS', 'android.permission.USE_CREDENTIALS']
Landroid/net/ConnectivityManager;->getNetworkInfo(I)Landroid/net/NetworkInfo; : ['android.permission.ACCESS_NETWORK_STATE']
Landroid/net/ConnectivityManager;->isActiveNetworkMetered()Z : ['android.permission.ACCESS_NETWORK_STATE']
Landroid/net/ConnectivityManager;->getActiveNetworkInfo()Landroid/net/NetworkInfo; : ['android.permission.ACCESS_NETWORK_STATE']
Landroid/telephony/TelephonyManager;->getDeviceId()Ljava/lang/String; : ['android.permission.READ_PHONE_STATE']
Landroid/telephony/TelephonyManager;->getSubscriberId()Ljava/lang/String; : ['android.permission.READ_PHONE_STATE']
Landroid/telephony/TelephonyManager;->getSimSerialNumber()Ljava/lang/String; : ['android.permission.READ_PHONE_STATE']

輸出的系統(tǒng)類女嘲、調(diào)用方法、需要的權限诞帐。

檢索某系統(tǒng)方法被調(diào)用的地方并打印

import os
import sys

# 引入androguard的路徑欣尼，根據(jù)個人存放的位置而定
androguard_module_path = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'androguard')
if not androguard_module_path in sys.path:
    sys.path.append(androguard_module_path)

from androguard.misc import AnalyzeAPK
from androguard.core.androconf import load_api_specific_resource_module

path = r"/apk"
out_path = r"/out"
files = []
path_list = os.listdir(path)
path_list.sort()
for name in path_list:
    if os.path.isfile(os.path.join(path, name)):
        files.append(name)


def main():
    for apkFile in files:
        file_name = os.path.splitext(apkFile)[0]
        print(apkFile)
        out = AnalyzeAPK(path + '/' + apkFile)
        a = out[0]
        d = out[1]
        dx = out[2]

        for meth in dx.classes['Ljava/io/File;'].get_methods():
            print("usage of method {}".format(meth.name))
            # 拿到改函數(shù)的引用函數(shù)
            for _, call, _ in meth.get_xref_from():
            print("  called by -> {} -- {}".format(call.class_name, call.name))

if __name__ == '__main__':
    main()

輸出結果

usage of method getPath
  called by -> Landroid/support/v4/util/AtomicFile; -- <init>
usage of method <init>
  called by -> Landroid/support/v4/util/AtomicFile; -- <init>
usage of method delete
  called by -> Landroid/support/v4/util/AtomicFile; -- failWrite
  called by -> Landroid/support/v4/util/AtomicFile; -- delete
  called by -> Landroid/support/v4/util/AtomicFile; -- delete
  called by -> Landroid/support/v4/util/AtomicFile; -- startWrite
  called by -> Landroid/support/v4/util/AtomicFile; -- openRead
  called by -> Landroid/support/v4/util/AtomicFile; -- finishWrite
usage of method renameTo
  called by -> Landroid/support/v4/util/AtomicFile; -- openRead
  called by -> Landroid/support/v4/util/AtomicFile; -- failWrite
  called by -> Landroid/support/v4/util/AtomicFile; -- startWrite
usage of method exists
  called by -> Landroid/support/v4/util/AtomicFile; -- startWrite
  called by -> Landroid/support/v4/util/AtomicFile; -- openRead
  called by -> Landroid/support/v4/util/AtomicFile; -- startWrite
usage of method getParentFile
  called by -> Landroid/support/v4/util/AtomicFile; -- startWrite
usage of method mkdir
  called by -> Landroid/support/v4/util/AtomicFile; -- startWrite

• ‘Ljava/io/File;’ 需要檢測的類
• meth.get_xref_from() 那該類中函數(shù)被引用的地方
• 你也可以自己搞個數(shù)組，配置好要檢查的相關函數(shù)停蕉，然后在上面代碼中加入if過濾即可
  如果你想找Android系統(tǒng)定位愕鼓，被應用哪些方法調(diào)用，你就可以這樣做：

dx.classes['Landroid/location/LocationManager;']

再運行一遍腳本就可以看到結果了慧起。

結束

寫這篇博客菇晃，主要目的是為了讓更多人知道這個東西吧，我自己去搜索文章的時候發(fā)現(xiàn)并沒有多少可以參考的蚓挤，導致很多人無從下手磺送，但其實官方文檔也很詳細，但是英文的灿意，看起來也不方便估灿，也希望這篇簡短的文章給你提供幫助，如果有問題請再聯(lián)系我或留言評論

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