gauravssnl’s gists

gauravssnl / build-rust-code-for-android.sh

Last active November 15, 2024 21:37

Cross compile Rust code for Android OS multiple architectures

	export NDK_HOME_TOOLCHAIN_BIN="$NDK_HOME/toolchains/llvm/prebuilt/linux-x86_64/bin"

	RUSTFLAGS="-C linker=${NDK_HOME_TOOLCHAIN_BIN}/aarch64-linux-android30-clang" cargo build --target aarch64-linux-android
	RUSTFLAGS="-C linker=${NDK_HOME_TOOLCHAIN_BIN}/armv7a-linux-androideabi30-clang" cargo build --target armv7-linux-androideabi
	RUSTFLAGS="-C linker=${NDK_HOME_TOOLCHAIN_BIN}/x86_64-linux-android30-clang" cargo build --target x86_64-linux-android
	RUSTFLAGS="-C linker=${NDK_HOME_TOOLCHAIN_BIN}/i686-linux-android30-clang" cargo build --target i686-linux-android

gauravssnl / Test.java

Last active November 13, 2024 20:57

JNI example to call java method (example : System.out.println)

	class Test {
	static {
	System.loadLibrary("hello");
	}

	public static void main(String[] args) {
	System.out.println("Test OK");
	System.out.println(stringFromJNI());
	}

gauravssnl / SampleEncPrefs.kt

Created January 30, 2024 15:23 — forked from scottyab/SampleEncPrefs.kt

Simple example of using EncrypredSharedPreferences

	package com.scottyab.whatsnewplayground.data

	import android.content.Context
	import android.content.SharedPreferences
	import androidx.security.crypto.EncryptedSharedPreferences
	import androidx.security.crypto.MasterKeys
	import com.scottyab.whatsnewplayground.BuildConfig

	internal class SampleEncPrefs(context: Context) {

gauravssnl / SignatureCheck.java

Created January 30, 2024 15:22 — forked from scottyab/SignatureCheck.java

Simple Android signature check. Please note: This was created in 2013, not actively maintained and may not be compatible with the latest Android versions. It's not particularly difficult for an attacker to decompile an .apk, find this tamper check, replace the APP_SIGNATURE with theirs and rebuild (or use method hooking to return true from `vali…

	import android.content.Context;
	import android.content.pm.PackageInfo;
	import android.content.pm.PackageManager;
	import android.content.pm.PackageManager.NameNotFoundException;
	import android.content.pm.Signature;

	public class TamperCheck {

	//we store the hash of the signture for a little more protection
	private static final String APP_SIGNATURE = "1038C0E34658923C4192E61B16846";

gauravssnl / SimpleApkV2.java

Created January 30, 2024 14:58 — forked from vvb2060/SimpleApkV2.java

SimpleApkV2

	// package me.piebridge;

	import java.io.IOException;
	import java.io.RandomAccessFile;
	import java.math.BigInteger;
	import java.nio.ByteBuffer;
	import java.nio.ByteOrder;
	import java.util.Arrays;
	import java.util.regex.Matcher;
	import java.util.regex.Pattern;

gauravssnl / InMemoryDexClassLoaderFactory.java

Created January 30, 2024 14:57 — forked from vvb2060/InMemoryDexClassLoaderFactory.java

	import android.app.AppComponentFactory;
	import android.content.pm.ApplicationInfo;
	import android.util.Log;

	import java.io.IOException;
	import java.nio.ByteBuffer;
	import java.nio.channels.Channels;
	import java.util.ArrayList;
	import java.util.List;
	import java.util.zip.ZipFile;

gauravssnl / hiddenapibypass.cpp

Created January 30, 2024 14:56 — forked from vvb2060/hiddenapibypass.cpp

`JNI_OnLoad` called by system

	jint JNI_OnLoad(JavaVM jvm, void ) {
	JNIEnv *env;
	jclass clazz;

	if (jvm->GetEnv((void **) &env, JNI_VERSION_1_6) != JNI_OK) {
	return JNI_ERR;
	}

	jclass vm = env->FindClass("dalvik/system/VMRuntime");
	jclass string = env->FindClass("java/lang/String");

gauravssnl / am_proc_start.cpp

Created January 30, 2024 14:55 — forked from vvb2060/am_proc_start.cpp

monitor app process start

	#include <unistd.h>
	#include <string>
	#include <cinttypes>
	#include <android/log.h>
	#include <sys/system_properties.h>

	using namespace std;

	extern "C" {

gauravssnl / show-sprite.asm

Created January 29, 2024 09:50 — forked from wkjagt/show-sprite.asm

	.segment "HEADER"
	.byte "NES", $1A ; Constant
	.byte 2 ; 2 x 16KB PRG ROM
	.byte 1 ; 1 x 8KB CHR ROM

	.segment "CHARS"
	;-------------------------------------------------------------
	; CREATE SPRITES
	;-------------------------------------------------------------
	; The following creates one sprite. The following two bitmaps

gauravssnl / snake6502.asm

Created January 29, 2024 09:50 — forked from wkjagt/snake6502.asm

	; ___ _ __ ___ __ ___
	; / __\|_ _ __ _\| \|_____ / /\| __\|/ \_ )
	; \__ \ ' \/ _` \| / / -_) _ \__ \ () / /
	; \|___/_\|\|_\__,_\|_\_\___\___/___/\__/___\|

	; An annotated version of the snake example from Nick Morgan's 6502 assembly tutorial
	; on http://skilldrick.github.io/easy6502/ that I created as an exercise for myself
	; to learn a little bit about assembly. I think I understood everything, but I may
	; also be completely wrong :-)

GAURAV gauravssnl