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Hook fs methods instead

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This commit is contained in:
Amsyar Rasyiq 2023-05-27 00:06:44 +00:00
parent a243801bcf
commit 2c227ce2fa
1 changed files with 38 additions and 19 deletions
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57
app/src/main/kotlin/com/pyoncord/xposed/Main.kt
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@ -40,8 +40,7 @@ class Main : IXposedHookZygoteInit, IXposedHookLoadPackage {
const val LOG_TAG = "Pyoncord"
const val DEFAULT_BUNDLE_ENDPOINT = "https://raw.githubusercontent.com/pyoncord/pyoncord/builds/pyoncord.js"
val filesDir = File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS), "pyoncord")
val pyoncord = File(filesDir, "pyoncord").apply { mkdirs() }
val pyoncord = File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS), "pyoncord").apply { mkdirs() }
val cache = File(pyoncord, "cache").apply { mkdirs() }
@ -119,28 +118,39 @@ class Main : IXposedHookZygoteInit, IXposedHookLoadPackage {
}
runCatching {
// TODO: How bad is this? Discord seem to not even use it from JS, but maybe I'll add some check soon anyway (hopefully :P)
val fileManagerModule = classLoader.loadClass("com.discord.file_manager.FileManagerModule")
val storageDirsField = fileManagerModule.getDeclaredField("storageDirs").apply { isAccessible = true }
XposedBridge.hookMethod(fileManagerModule.constructors.first(), object: XC_MethodHook() {
@Suppress("UNCHECKED_CAST")
override fun afterHookedMethod(param: MethodHookParam): Unit = with(param) {
val storageDirsField = (param.thisObject as Any).javaClass.getDeclaredField("storageDirs").apply { isAccessible = true }
val storageDirs = storageDirsField.get(param.thisObject) as HashMap<String, String>
XposedBridge.hookMethod(
fileManagerModule.declaredMethods.find { it.name == "readFile" },
object: XC_MethodHook() {
override fun beforeHookedMethod(param: MethodHookParam): Unit = with(param) {
val path = args[0] as? String ?: return
// Redirect 'documents' to our 'pyoncord' folder
storageDirs["documents"] = filesDir.absolutePath
}
})
val fontHook = object : XC_MethodHook() {
override fun beforeHookedMethod(param: MethodHookParam): Unit = with(param) {
File(pyoncord, args[1] as String).takeIf { it.exists() }?.let {
Log.d(LOG_TAG, "Overriding font from ${args[1]} to $it")
result = if (method.name == "createFromAsset") Typeface.createFromFile(it.absolutePath) else Font.Builder(it)
if (path.contains("/pyoncord/")) {
// We do a little hack :P
val actualPath = path.substringAfter("/pyoncord/")
args[0] = File(pyoncord, actualPath).absolutePath
}
}
}
}
)
XposedBridge.hookMethod(
fileManagerModule.declaredMethods.find { it.name == "writeFile" },
object: XC_MethodHook() {
override fun beforeHookedMethod(param: MethodHookParam): Unit = with(param) {
val dir = args[0] as? String ?: return
val path = args[1] as? String ?: return
val storageDirs = storageDirsField.get(thisObject) as HashMap<String, String>
if (dir == "documents" && path.contains("pyoncord/")) {
val docsDir = File(storageDirs["documents"] as String).toPath()
args[1] = docsDir.relativize(File(pyoncord.parentFile, path).toPath()).toString()
}
}
}
)
// Fight package renaming side effects
if (packageName != "com.discord") {
@ -154,6 +164,15 @@ class Main : IXposedHookZygoteInit, IXposedHookLoadPackage {
}
// Custom fonts
val fontHook = object : XC_MethodHook() {
override fun beforeHookedMethod(param: MethodHookParam): Unit = with(param) {
File(pyoncord, args[1] as String).takeIf { it.exists() }?.let {
Log.d(LOG_TAG, "Overriding font from ${args[1]} to $it")
result = if (method.name == "createFromAsset") Typeface.createFromFile(it.absolutePath) else Font.Builder(it)
}
}
}
XposedBridge.hookMethod(
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
Font.Builder::class.java.getDeclaredConstructor(AssetManager::class.java, String::class.java)