├── .classpath ├── .project ├── .settings └── org.eclipse.ltk.core.refactoring.prefs ├── AndroidManifest.xml ├── LICENSE ├── README.md ├── bin └── Android-KillPermAndSigChecks.apk ├── ic_launcher-web.png ├── libs ├── android-support-v4.jar └── substrate-api.jar ├── proguard-project.txt ├── project.properties ├── res ├── drawable-hdpi │ └── ic_launcher.png ├── drawable-mdpi │ └── ic_launcher.png ├── drawable-xhdpi │ └── ic_launcher.png ├── drawable-xxhdpi │ └── ic_launcher.png └── values │ ├── strings.xml │ └── styles.xml └── src └── com └── android └── KillPermAndSigChecks └── Hook.java /.classpath: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /.project: -------------------------------------------------------------------------------- 1 | 2 | 3 | Android-KillPermAndSigChecks 4 | 5 | 6 | 7 | 8 | 9 | com.android.ide.eclipse.adt.ResourceManagerBuilder 10 | 11 | 12 | 13 | 14 | com.android.ide.eclipse.adt.PreCompilerBuilder 15 | 16 | 17 | 18 | 19 | org.eclipse.jdt.core.javabuilder 20 | 21 | 22 | 23 | 24 | com.android.ide.eclipse.adt.ApkBuilder 25 | 26 | 27 | 28 | 29 | 30 | com.android.ide.eclipse.adt.AndroidNature 31 | org.eclipse.jdt.core.javanature 32 | 33 | 34 | -------------------------------------------------------------------------------- /.settings/org.eclipse.ltk.core.refactoring.prefs: -------------------------------------------------------------------------------- 1 | eclipse.preferences.version=1 2 | org.eclipse.ltk.core.refactoring.enable.project.refactoring.history=false 3 | -------------------------------------------------------------------------------- /AndroidManifest.xml: -------------------------------------------------------------------------------- 1 | 5 | 6 | 7 | 8 | 11 | 12 | 17 | 18 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 2, June 1991 3 | 4 | Copyright (C) 1989, 1991 Free Software Foundation, Inc., 5 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 6 | Everyone is permitted to copy and distribute verbatim copies 7 | of this license document, but changing it is not allowed. 8 | 9 | Preamble 10 | 11 | The licenses for most software are designed to take away your 12 | freedom to share and change it. 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THE ENTIRE RISK AS 266 | TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE 267 | PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, 268 | REPAIR OR CORRECTION. 269 | 270 | 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 271 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR 272 | REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, 273 | INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING 274 | OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED 275 | TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY 276 | YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER 277 | PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE 278 | POSSIBILITY OF SUCH DAMAGES. 279 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | Android-KillPermAndSigChecks 2 | ============================ 3 | 4 | Bypass signature and permission checks for IPCs. 5 | 6 | Description 7 | ----------- 8 | 9 | This tool leverages Cydia Substrate to bypass signature and permission checks for IPCs. 10 | 11 | Usage 12 | ----- 13 | 14 | * Ensure that Cydia Substrate has been deployed on your test device. The installer requires a rooted device and can be found on the Google Play store at https://play.google.com/store/apps/details?id=com.saurik.substrate&hl=en 15 | * Download the pre-compiled APK available at https://github.com/iSECPartners/Android-KillPermAndSigChecks/releases 16 | * Install the APK package on the device: 17 | 18 | adb install Android-KillPermAndSigChecks.apk 19 | 20 | Notes 21 | ----- 22 | * This should only be used on test devices 23 | * The code also contains code to bypass more general signature checks but it is disabled for now 24 | 25 | Author 26 | ------- 27 | Marc Blanchou 28 | -------------------------------------------------------------------------------- /bin/Android-KillPermAndSigChecks.apk: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/iSECPartners/Android-KillPermAndSigChecks/1c8079598af5e3a726793cc5f72691b58bbb84f8/bin/Android-KillPermAndSigChecks.apk -------------------------------------------------------------------------------- /ic_launcher-web.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/iSECPartners/Android-KillPermAndSigChecks/1c8079598af5e3a726793cc5f72691b58bbb84f8/ic_launcher-web.png -------------------------------------------------------------------------------- /libs/android-support-v4.jar: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/iSECPartners/Android-KillPermAndSigChecks/1c8079598af5e3a726793cc5f72691b58bbb84f8/libs/android-support-v4.jar -------------------------------------------------------------------------------- /libs/substrate-api.jar: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/iSECPartners/Android-KillPermAndSigChecks/1c8079598af5e3a726793cc5f72691b58bbb84f8/libs/substrate-api.jar -------------------------------------------------------------------------------- /proguard-project.txt: -------------------------------------------------------------------------------- 1 | # To enable ProGuard in your project, edit project.properties 2 | # to define the proguard.config property as described in that file. 3 | # 4 | # Add project specific ProGuard rules here. 5 | # By default, the flags in this file are appended to flags specified 6 | # in ${sdk.dir}/tools/proguard/proguard-android.txt 7 | # You can edit the include path and order by changing the ProGuard 8 | # include property in project.properties. 9 | # 10 | # For more details, see 11 | # http://developer.android.com/guide/developing/tools/proguard.html 12 | 13 | # Add any project specific keep options here: 14 | 15 | # If your project uses WebView with JS, uncomment the following 16 | # and specify the fully qualified class name to the JavaScript interface 17 | # class: 18 | #-keepclassmembers class fqcn.of.javascript.interface.for.webview { 19 | # public *; 20 | #} 21 | -------------------------------------------------------------------------------- /project.properties: -------------------------------------------------------------------------------- 1 | # This file is automatically generated by Android Tools. 2 | # Do not modify this file -- YOUR CHANGES WILL BE ERASED! 3 | # 4 | # This file must be checked in Version Control Systems. 5 | # 6 | # To customize properties used by the Ant build system edit 7 | # "ant.properties", and override values to adapt the script to your 8 | # project structure. 9 | # 10 | # To enable ProGuard to shrink and obfuscate your code, uncomment this (available properties: sdk.dir, user.home): 11 | #proguard.config=${sdk.dir}/tools/proguard/proguard-android.txt:proguard-project.txt 12 | 13 | # Project target. 14 | target=android-10 15 | -------------------------------------------------------------------------------- /res/drawable-hdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/iSECPartners/Android-KillPermAndSigChecks/1c8079598af5e3a726793cc5f72691b58bbb84f8/res/drawable-hdpi/ic_launcher.png -------------------------------------------------------------------------------- /res/drawable-mdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/iSECPartners/Android-KillPermAndSigChecks/1c8079598af5e3a726793cc5f72691b58bbb84f8/res/drawable-mdpi/ic_launcher.png -------------------------------------------------------------------------------- /res/drawable-xhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/iSECPartners/Android-KillPermAndSigChecks/1c8079598af5e3a726793cc5f72691b58bbb84f8/res/drawable-xhdpi/ic_launcher.png -------------------------------------------------------------------------------- /res/drawable-xxhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/iSECPartners/Android-KillPermAndSigChecks/1c8079598af5e3a726793cc5f72691b58bbb84f8/res/drawable-xxhdpi/ic_launcher.png -------------------------------------------------------------------------------- /res/values/strings.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | Android NO Perm And Sig Checks 4 | 5 | 6 | -------------------------------------------------------------------------------- /res/values/styles.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 7 | 14 | 15 | 16 | 19 | 20 | 21 | -------------------------------------------------------------------------------- /src/com/android/KillPermAndSigChecks/Hook.java: -------------------------------------------------------------------------------- 1 | package com.android.KillPermAndSigChecks; 2 | 3 | import java.lang.reflect.Method; 4 | 5 | import android.content.Context; 6 | import android.util.Log; 7 | import com.saurik.substrate.*; 8 | 9 | public class Hook { 10 | private static String _TAG = "KillPermAndSigChecks"; 11 | static void initialize() { 12 | 13 | MS.hookClassLoad("android.content.ContextWrapper", new MS.ClassLoadHook() { 14 | public void classLoaded(Class _class) { 15 | hookMethod(_class, "checkCallingOrSelfPermission", 16 | new Class[] {String.class}, 17 | android.content.pm.PackageManager.PERMISSION_GRANTED); 18 | hookMethod(_class, "checkCallingOrSelfUriPermission", 19 | new Class[] {android.net.Uri.class, Integer.TYPE}, 20 | android.content.pm.PackageManager.PERMISSION_GRANTED); 21 | hookMethod(_class, "checkCallingUriPermission", 22 | new Class[] {android.net.Uri.class, Integer.TYPE}, 23 | android.content.pm.PackageManager.PERMISSION_GRANTED); 24 | hookMethod(_class, "checkPermission", 25 | new Class[] {String.class, Integer.TYPE, Integer.TYPE}, 26 | android.content.pm.PackageManager.PERMISSION_GRANTED); 27 | hookMethod(_class, "checkUriPermission", 28 | new Class[] {android.net.Uri.class, Integer.TYPE, 29 | Integer.TYPE, Integer.TYPE}, 30 | android.content.pm.PackageManager.PERMISSION_GRANTED); 31 | hookMethod(_class, "checkUriPermission", 32 | new Class[] {android.net.Uri.class, String.class, String.class, 33 | Integer.TYPE, Integer.TYPE, Integer.TYPE}, 34 | android.content.pm.PackageManager.PERMISSION_GRANTED); 35 | } 36 | }); 37 | 38 | /* 39 | MS.hookClassLoad("com.android.server.DevicePolicyManagerService", new MS.ClassLoadHook() { 40 | public void classLoaded(Class _class) { 41 | hookMethod(_class, "enforceCrossUserPermission", 42 | new Class[] {Integer.TYPE}, 43 | null); 44 | } 45 | }); 46 | */ 47 | 48 | // Note: do not use this code system-wide 49 | 50 | // TODO, add a filter per application 51 | 52 | /*MS.hookClassLoad("java.security.Signature", new MS.ClassLoadHook() { 53 | public void classLoaded(Class _class) { 54 | hookMethod(_class, "verify", 55 | new Class[] {byte[].class}, 56 | true); 57 | hookMethod(_class, "verify", 58 | new Class[] {byte[].class, Integer.TYPE, Integer.TYPE}, 59 | true); 60 | } 61 | });*/ 62 | 63 | // TODO, need to hook getPackage() and return a PM with no checks 64 | 65 | /*MS.hookClassLoad("android.content.pm.PackageManager", new MS.ClassLoadHook() { 66 | public void classLoaded(Class _class) { 67 | // implement the methods below with the PM: 68 | "checkSignatures", new Class[] {Integer.TYPE, Integer.TYPE}, 69 | -> android.content.pm.PackageManager.SIGNATURE_MATCH 70 | "checkSignatures", new Class[] {String.class, String.class}, 71 | -> android.content.pm.PackageManager.SIGNATURE_MATCH); 72 | "checkPermission", new Class[] {String.class, String.class}, 73 | -> android.content.pm.PackageManager.PERMISSION_GRANTED); 74 | } 75 | });*/ 76 | } 77 | 78 | protected static void hookMethod(Class _class, String methodName, 79 | Class[] params, final Object ret) { 80 | Method method; 81 | 82 | try { 83 | method = _class.getMethod(methodName, params); 84 | } catch (NoSuchMethodException e) { 85 | method = null; 86 | Log.i(_TAG, "NoSuchMethod: " + methodName + " with " + 87 | params.length + " args" + ", Error: " + e); 88 | for (int j = 0; j < params.length; j++) 89 | Log.i(_TAG, "Arg "+ (j+1) +" type: " + params[j]); 90 | } 91 | 92 | if (method != null) { 93 | Log.i(_TAG, "Hooking " + methodName + "() with " + params.length + " args"); 94 | MS.hookMethod(_class, method, 95 | new MS.MethodAlteration() { 96 | public Object invoked(final Context hooked, 97 | final Object... args) throws Throwable { 98 | return ret; 99 | } 100 | }); 101 | } 102 | } 103 | } 104 | --------------------------------------------------------------------------------