initial commit

.gitignore

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+*.iml
+.gradle
+/local.properties
+/.idea/
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties

README.md

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+# SnapEnhance
+A xposed mod to enhance the Snapchat experience
+The project is currently in development, so expect bugs and crashes. Feel free to open an issue if you find any bug.
+
+## build
+   1. make sure you have the latest version of [LSPosed](https://github.com/LSPosed/LSPosed)
+   2. clone this repo using ``git clone``
+   3. run ``./gradlew assembleDebug``
+   4. install the apk using adb ``adb install -r app/build/outputs/apk/debug/app-debug.apk``
+
+## features
+- media downloader (+ overlay merging)
+- message auto save
+- message in notifications
+- message logger
+- snapchat plus features
+- anonymous story viewing
+- stealth mode
+- screenshot detection bypass
+- conversation preview
+- prevent status notifications
+- UI tweaks (remove call button, record button, ...)
+- ad blocker
+
+## todo
+- [] localization
+- [] ui improvements
+- [] snap splitting

app/.gitignore

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+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+/.idea/
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties

app/build.gradle

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+plugins {
+    id 'com.android.application'
+    id 'org.jetbrains.kotlin.android'
+}
+
+def appVersionName = "0.0.1"
+def appVersionCode = 1
+
+android {
+    compileSdk 32
+
+    defaultConfig {
+        applicationId "me.rhunk.snapenhance"
+        minSdk 29
+        targetSdk 32
+        versionCode appVersionCode
+        versionName appVersionName
+        multiDexEnabled true
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled true
+            shrinkResources true
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    //keep arm64-v8a native libs
+    packagingOptions {
+        exclude "META-INF/**"
+        exclude 'lib/x86/**'
+        exclude 'lib/x86_64/**'
+        exclude 'lib/armeabi-v7a/**'
+    }
+
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
+}
+
+afterEvaluate {
+    //auto install for debug purpose
+    getTasks().getByPath(":app:assembleDebug").doLast {
+        try {
+            println "Killing Snapchat"
+            exec {
+                commandLine "adb", "shell", "am", "force-stop", "com.snapchat.android"
+            }
+            println "Installing debug build"
+            exec() {
+                commandLine "adb", "install", "-r", "-d", "${buildDir}/outputs/apk/debug/app-debug.apk"
+            }
+            println "Starting Snapchat"
+            exec {
+                commandLine "adb", "shell", "am", "start", "com.snapchat.android"
+            }
+        } catch (Throwable t) {
+            println "Failed to install debug build"
+            t.printStackTrace()
+        }
+    }
+}
+
+dependencies {
+    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.6.1'
+    compileOnly files('libs/LSPosed-api-1.0-SNAPSHOT.jar')
+    implementation 'com.google.code.gson:gson:2.10.1'
+    implementation 'com.arthenica:ffmpeg-kit-min-gpl:5.1'
+}

app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    package="me.rhunk.snapenhance">
+
+    <uses-permission android:name="android.permission.DOWNLOAD_WITHOUT_NOTIFICATION" />
+    <uses-permission android:name="android.permission.INTERNET" />
+
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"
+        tools:ignore="ScopedStorage" />
+    <application
+        android:usesCleartextTraffic="true"
+        android:label="@string/app_name"
+        tools:targetApi="31">
+        <meta-data
+            android:name="xposedmodule"
+            android:value="true" />
+        <meta-data
+            android:name="xposeddescription"
+            android:value="Enhanced Snapchat" />
+        <meta-data
+            android:name="xposedminversion"
+            android:value="53" />
+        <meta-data
+            android:name="xposedscope"
+            android:resource="@array/sc_scope" />
+
+        <service
+            android:name=".bridge.service.BridgeService"
+            android:exported="true">
+        </service>
+
+        <activity
+            android:theme="@android:style/Theme.NoDisplay"
+            android:name=".bridge.service.MainActivity"
+            android:exported="true"
+            android:excludeFromRecents="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+
+    </application>
+
+</manifest>

app/src/main/assets/xposed_init

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+me.rhunk.snapenhance.XposedLoader

app/src/main/java/me/rhunk/snapenhance/XposedLoader.java

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+package me.rhunk.snapenhance;
+
+import de.robv.android.xposed.IXposedHookLoadPackage;
+import de.robv.android.xposed.XposedBridge;
+import de.robv.android.xposed.XposedHelpers;
+import de.robv.android.xposed.callbacks.XC_LoadPackage;
+
+public class XposedLoader implements IXposedHookLoadPackage {
+    @Override
+    public void handleLoadPackage(XC_LoadPackage.LoadPackageParam packageParam) throws Throwable {
+        if (!packageParam.packageName.equals(Constants.SNAPCHAT_PACKAGE_NAME)) return;
+        new SnapEnhance();
+    }
+}

app/src/main/kotlin/me/rhunk/snapenhance/Constants.kt

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+package me.rhunk.snapenhance
+
+object Constants {
+    const val TAG = "SnapEnhance"
+    const val SNAPCHAT_PACKAGE_NAME = "com.snapchat.android"
+
+    const val VIEW_INJECTED_CODE = 0x7FFFFF02
+    const val VIEW_DRAWER = 0x7FFFFF03
+
+    val ARROYO_NOTE_ENCRYPTION_PROTO_PATH = intArrayOf(4, 4, 6, 1, 1)
+    val ARROYO_SNAP_ENCRYPTION_PROTO_PATH = intArrayOf(4, 4, 11, 5, 1, 1)
+    val MESSAGE_SNAP_ENCRYPTION_PROTO_PATH = intArrayOf(11, 5, 1, 1)
+    val ARROYO_EXTERNAL_MEDIA_ENCRYPTION_PROTO_PATH = intArrayOf(4, 4, 3, 3, 5, 1, 1)
+    val ARROYO_STRING_CHAT_MESSAGE_PROTO = intArrayOf(4, 4, 2, 1)
+    val ARROYO_URL_KEY_PROTO_PATH = intArrayOf(4, 5, 1, 3, 2, 2)
+
+    const val ARROYO_ENCRYPTION_PROTO_INDEX = 19
+    const val ARROYO_ENCRYPTION_PROTO_INDEX_V2 = 4
+
+    const val USER_AGENT = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36"
+}

app/src/main/kotlin/me/rhunk/snapenhance/Logger.kt

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+package me.rhunk.snapenhance
+
+import android.util.Log
+import de.robv.android.xposed.XposedBridge
+
+object Logger {
+    private const val TAG = "SnapEnhance"
+
+    fun log(message: Any?) {
+        Log.i(TAG, message.toString())
+    }
+
+    fun debug(message: Any?) {
+        if (!BuildConfig.DEBUG) return
+        Log.d(TAG, message.toString())
+    }
+
+    fun error(throwable: Throwable) {
+        Log.e(TAG, "",throwable)
+    }
+
+    fun error(message: Any?) {
+        Log.e(TAG, message.toString())
+    }
+
+    fun error(message: Any?, throwable: Throwable) {
+        Log.e(TAG, message.toString(), throwable)
+    }
+
+    fun xposedLog(message: Any?) {
+        XposedBridge.log(message.toString())
+    }
+
+    fun xposedLog(message: Any?, throwable: Throwable?) {
+        XposedBridge.log(message.toString())
+        XposedBridge.log(throwable)
+    }
+
+    fun xposedLog(throwable: Throwable) {
+        XposedBridge.log(throwable)
+    }
+}

app/src/main/kotlin/me/rhunk/snapenhance/ModContext.kt

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+package me.rhunk.snapenhance
+
+import android.app.Activity
+import android.content.Context
+import android.content.Intent
+import android.content.res.Resources
+import android.os.Handler
+import android.os.Looper
+import android.os.Process
+import android.widget.Toast
+import com.google.gson.Gson
+import com.google.gson.GsonBuilder
+import me.rhunk.snapenhance.bridge.client.BridgeClient
+import me.rhunk.snapenhance.database.DatabaseAccess
+import me.rhunk.snapenhance.features.Feature
+import me.rhunk.snapenhance.manager.impl.ConfigManager
+import me.rhunk.snapenhance.manager.impl.FeatureManager
+import me.rhunk.snapenhance.manager.impl.MappingManager
+import me.rhunk.snapenhance.manager.impl.TranslationManager
+import me.rhunk.snapenhance.util.download.DownloadServer
+import java.util.concurrent.ExecutorService
+import java.util.concurrent.Executors
+import kotlin.reflect.KClass
+import kotlin.system.exitProcess
+
+class ModContext {
+    private val executorService: ExecutorService = Executors.newCachedThreadPool()
+
+    lateinit var androidContext: Context
+    var mainActivity: Activity? = null
+
+    val gson: Gson = GsonBuilder().create()
+
+    val bridgeClient = BridgeClient(this)
+    val translation = TranslationManager(this)
+    val features = FeatureManager(this)
+    val mappings = MappingManager(this)
+    val config = ConfigManager(this)
+    val database = DatabaseAccess(this)
+    val downloadServer = DownloadServer(this)
+    val classCache get() = SnapEnhance.classCache
+    val resources: Resources get() = androidContext.resources
+
+    fun <T : Feature> feature(featureClass: KClass<T>): T {
+        return features.get(featureClass)!!
+    }
+
+    fun runOnUiThread(runnable: () -> Unit) {
+        Handler(Looper.getMainLooper()).post {
+            runCatching(runnable).onFailure {
+                Logger.xposedLog("UI thread runnable failed", it)
+            }
+        }
+    }
+
+    fun executeAsync(runnable: () -> Unit) {
+        executorService.submit {
+            runCatching {
+                runnable()
+            }.onFailure {
+                Logger.xposedLog("Async task failed", it)
+            }
+        }
+    }
+
+    fun shortToast(message: Any) {
+        runOnUiThread {
+            Toast.makeText(androidContext, message.toString(), Toast.LENGTH_SHORT).show()
+        }
+    }
+
+    fun longToast(message: Any) {
+        runOnUiThread {
+            Toast.makeText(androidContext, message.toString(), Toast.LENGTH_LONG).show()
+        }
+    }
+
+    fun restartApp() {
+        androidContext.packageManager.getLaunchIntentForPackage(
+            Constants.SNAPCHAT_PACKAGE_NAME
+        )?.let {
+            val intent = Intent.makeRestartActivityTask(it.component)
+            androidContext.startActivity(intent)
+            Runtime.getRuntime().exit(0)
+        }
+    }
+
+    fun softRestartApp() {
+        exitProcess(0)
+    }
+
+    fun forceCloseApp() {
+        Process.killProcess(Process.myPid())
+        exitProcess(1)
+    }
+}