Create module for aliuhook library

This was done to prevent a policy violation in F-Droid that restricts usage of such repositories for security concerns.

Tested-by: Pranav Purwar <[email protected]>
Signed-off-by: PranavPurwar <[email protected]>

app/build.gradle.kts

@@ -5,6 +5,13 @@
  * You should have received a copy of the GNU General Public License along with Cosmic IDE. If not, see <https://www.gnu.org/licenses/>.
  */
 
+/*
+ * This file is part of Cosmic IDE.
+ * Cosmic IDE is a free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+ * Cosmic IDE 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 General Public License for more details.
+ * You should have received a copy of the GNU General Public License along with Cosmic IDE. If not, see <https://www.gnu.org/licenses/>.
+ */
+
 plugins {
     id("com.android.application")
     id("org.jetbrains.kotlin.android")
@@ -183,7 +190,7 @@ dependencies {
     implementation("io.noties.markwon:html:$markwonVersion")
     implementation("io.noties.markwon:linkify:$markwonVersion")
 
-    implementation("com.aliucord:Aliuhook:main-SNAPSHOT")
+    implementation(projects.feature.aliuhook)
     implementation("de.maxr1998:modernandroidpreferences:2.3.2")
 
     implementation("org.jetbrains.kotlinx:kotlinx-coroutines-android:1.7.3")

feature/aliuhook/.gitignore

@@ -0,0 +1 @@
+/build

feature/aliuhook/README.md

@@ -0,0 +1,18 @@
+The code in this module is part of Aliucord, and licensed under the OSL-3.0 license.
+The code was copied due to F-Droid's policy of not allowing apps to use insecure maven repositories.
+
+No major changes have been to the [upstream](https://github.com/Aliucord/hook/tree/main) code.
+
+License header:
+
+```agsl
+/*
+ * This file is part of AliuHook, a library providing XposedAPI bindings to LSPlant
+ * Copyright (c) 2021 Juby210 & Vendicated
+ * Licensed under the Open Software License version 3.0
+ *
+ * Originally written by rovo89 as part of the original Xposed
+ * Copyright 2013 rovo89, Tungstwenty
+ * Licensed under the Apache License, Version 2.0, see http://www.apache.org/licenses/LICENSE-2.0
+ */
+```

feature/aliuhook/build.gradle.kts

@@ -0,0 +1,56 @@
+/*
+ * This file is part of Cosmic IDE.
+ * Cosmic IDE is a free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+ * Cosmic IDE 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 General Public License for more details.
+ * You should have received a copy of the GNU General Public License along with Cosmic IDE. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+/*
+ * This file is part of Cosmic IDE.
+ * Cosmic IDE is a free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+ * Cosmic IDE 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 General Public License for more details.
+ * You should have received a copy of the GNU General Public License along with Cosmic IDE. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+plugins {
+    id("com.android.library")
+    id("org.jetbrains.kotlin.android")
+}
+
+android {
+    namespace = "com.aliucord.aliuhook"
+    compileSdk = 34
+
+    defaultConfig {
+        minSdk = 26
+
+        externalNativeBuild {
+            cmake {
+                arguments("-DANDROID_STL=c++_shared")
+            }
+        }
+    }
+
+    buildFeatures {
+        prefab = true
+    }
+
+    externalNativeBuild {
+        cmake {
+            path = file("src/main/cpp/CMakeLists.txt")
+        }
+    }
+
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
+    }
+    kotlinOptions {
+        jvmTarget = "17"
+    }
+}
+
+dependencies {
+    implementation("io.github.vvb2060.ndk:dobby:1.2")
+    implementation("org.lsposed.lsplant:lsplant:5.2")
+}

feature/aliuhook/src/main/AndroidManifest.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+  ~ This file is part of Cosmic IDE.
+  ~ Cosmic IDE is a free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+  ~ Cosmic IDE 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 General Public License for more details.
+  ~ You should have received a copy of the GNU General Public License along with Cosmic IDE. If not, see <https://www.gnu.org/licenses/>.
+  -->
+
+<!--
+  ~ This file is part of Cosmic IDE.
+  ~ Cosmic IDE is a free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+  ~ Cosmic IDE 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 General Public License for more details.
+  ~ You should have received a copy of the GNU General Public License along with Cosmic IDE. If not, see <https://www.gnu.org/licenses/>.
+  -->
+
+<manifest>
+
+</manifest>

feature/aliuhook/src/main/cpp/CMakeLists.txt

@@ -0,0 +1,15 @@
+# For more information about using CMake with Android Studio, read the
+# documentation: https://d.android.com/studio/projects/add-native-code.html
+
+cmake_minimum_required(VERSION 3.22.1)
+project("aliuhook")
+
+set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+add_library(aliuhook SHARED aliuhook.cpp elf_img.cpp profile_saver.cpp hidden_api.cpp)
+
+find_package(lsplant REQUIRED CONFIG)
+find_package(dobby REQUIRED CONFIG)
+
+target_link_libraries(aliuhook log lsplant::lsplant dobby::dobby)

feature/aliuhook/src/main/cpp/aliuhook.cpp

@@ -0,0 +1,174 @@
+/*
+ * This file is part of AliuHook, a library providing XposedAPI bindings to LSPlant
+ * Copyright (c) 2021 Juby210 & Vendicated
+ * Licensed under the Open Software License version 3.0
+ */
+
+#include <jni.h>
+#include <string>
+#include <lsplant.hpp>
+#include <dobby.h>
+#include <sys/mman.h>
+#include <bits/sysconf.h>
+#include "elf_img.h"
+#include "log.h"
+#include "profile_saver.h"
+#include "hidden_api.h"
+#include <sys/system_properties.h>
+#include <cstdlib>
+#include <cerrno>
+#include "aliuhook.h"
+
+int AliuHook::android_version = -1;
+pine::ElfImg AliuHook::elf_img; // NOLINT(cert-err58-cpp)
+
+void AliuHook::init(int version) {
+    elf_img.Init("libart.so", version);
+    android_version = version;
+}
+
+static size_t page_size_;
+
+// Macros to align addresses to page boundaries
+#define ALIGN_DOWN(addr, page_size)         ((addr) & -(page_size))
+#define ALIGN_UP(addr, page_size)           (((addr) + ((page_size) - 1)) & ~((page_size) - 1))
+
+static bool Unprotect(void *addr) {
+    auto addr_uint = reinterpret_cast<uintptr_t>(addr);
+    auto page_aligned_prt = reinterpret_cast<void *>(ALIGN_DOWN(addr_uint, page_size_));
+    size_t size = page_size_;
+    if (ALIGN_UP(addr_uint + page_size_, page_size_) != ALIGN_UP(addr_uint, page_size_)) {
+        size += page_size_;
+    }
+
+    int result = mprotect(page_aligned_prt, size, PROT_READ | PROT_WRITE | PROT_EXEC);
+    if (result == -1) {
+        LOGE("mprotect failed for %p: %s (%d)", addr, strerror(errno), errno);
+        return false;
+    }
+    return true;
+}
+
+void *InlineHooker(void *address, void *replacement) {
+    if (!Unprotect(address)) {
+        return nullptr;
+    }
+
+    void *origin_call;
+    if (DobbyHook(address, replacement, &origin_call) == RS_SUCCESS) {
+        return origin_call;
+    } else {
+        return nullptr;
+    }
+}
+
+bool InlineUnhooker(void *func) {
+    return DobbyDestroy(func) == RT_SUCCESS;
+}
+
+extern "C"
+JNIEXPORT jboolean
+
+JNICALL
+Java_de_robv_android_xposed_XposedBridge_isHooked0(JNIEnv *env, jclass, jobject method) {
+    return lsplant::IsHooked(env, method);
+}
+
+extern "C"
+JNIEXPORT jobject
+
+JNICALL
+Java_de_robv_android_xposed_XposedBridge_hook0(JNIEnv *env, jclass, jobject context,
+                                               jobject original,
+                                               jobject callback) {
+    return lsplant::Hook(env, original, context, callback);
+}
+
+extern "C"
+JNIEXPORT jboolean
+
+JNICALL
+Java_de_robv_android_xposed_XposedBridge_unhook0(JNIEnv *env, jclass, jobject target) {
+    return lsplant::UnHook(env, target);
+}
+
+extern "C"
+JNIEXPORT jboolean
+
+JNICALL
+Java_de_robv_android_xposed_XposedBridge_deoptimize0(JNIEnv *env, jclass, jobject method) {
+    return lsplant::Deoptimize(env, method);
+}
+
+extern "C"
+JNIEXPORT jboolean
+
+JNICALL
+Java_de_robv_android_xposed_XposedBridge_makeClassInheritable0(JNIEnv *env, jclass, jclass clazz) {
+    return lsplant::MakeClassInheritable(env, clazz);
+}
+
+extern "C"
+JNIEXPORT jboolean
+
+JNICALL
+Java_de_robv_android_xposed_XposedBridge_disableProfileSaver(JNIEnv *, jclass) {
+    return disable_profile_saver();
+}
+
+extern "C"
+JNIEXPORT jboolean
+
+JNICALL
+Java_de_robv_android_xposed_XposedBridge_disableHiddenApiRestrictions(JNIEnv *env, jclass) {
+    return disable_hidden_api(env);
+}
+
+JNIEXPORT jint
+
+JNICALL
+JNI_OnLoad(JavaVM *vm, void *) {
+    JNIEnv *env;
+    if (vm->GetEnv((void **) &env, JNI_VERSION_1_6) != JNI_OK) {
+        return JNI_ERR;
+    }
+
+    page_size_ = static_cast<const size_t>(sysconf(_SC_PAGESIZE));
+
+    {
+        char version_str[PROP_VALUE_MAX];
+        if (!__system_property_get("ro.build.version.sdk", version_str)) {
+            LOGE("Failed to obtain SDK int");
+            return JNI_ERR;
+        }
+        long version = std::strtol(version_str, nullptr, 10);
+
+        if (version == 0) {
+            LOGE("Invalid SDK int %s", version_str);
+            return JNI_ERR;
+        }
+
+        AliuHook::init(static_cast<int>(version));
+    }
+
+    lsplant::InitInfo initInfo{
+            .inline_hooker = InlineHooker,
+            .inline_unhooker = InlineUnhooker,
+            .art_symbol_resolver = [](std::string_view symbol) -> void * {
+                return AliuHook::elf_img.GetSymbolAddress(symbol, false, false);
+            },
+            .art_symbol_prefix_resolver = [](std::string_view symbol) -> void * {
+                return AliuHook::elf_img.GetSymbolAddress(symbol, false, true);
+            }
+    };
+
+    bool res = lsplant::Init(env, initInfo);
+    if (!res) {
+        LOGE("lsplant init failed");
+        return JNI_ERR;
+    }
+
+    LOGI("lsplant init finished");
+
+    return JNI_VERSION_1_6;
+}

feature/aliuhook/src/main/cpp/aliuhook.h

@@ -0,0 +1,22 @@
+//
+// Created by ven on 24/03/2022.
+//
+
+#ifndef ALIUHOOK_ALIUHOOK_H
+#define ALIUHOOK_ALIUHOOK_H
+
+#include "elf_img.h"
+
+void *InlineHooker(void *, void *);
+
+bool InlineUnhooker(void *);
+
+class AliuHook {
+public:
+    static pine::ElfImg elf_img;
+    static int android_version;
+
+    static void init(int version);
+};
+
+#endif //ALIUHOOK_ALIUHOOK_H