mirror of
https://github.com/topjohnwu/Magisk.git
synced 2025-06-12 05:07:45 +02:00
Open source fully obfuscated stub
This commit is contained in:
topjohnwu
@ -26,6 +26,7 @@ class MagiskPlugin : Plugin<Project> {
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override fun apply(project: Project) = project.applyPlugin()
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private fun Project.applyPlugin() {
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initRandom(rootProject.file("dict.txt"))
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props.clear()
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rootProject.file("gradle.properties").inputStream().use { props.load(it) }
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val configPath: String? by this
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286
buildSrc/src/main/java/Codegen.kt
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286
buildSrc/src/main/java/Codegen.kt
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@ -0,0 +1,286 @@
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import java.io.ByteArrayOutputStream
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import java.io.File
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import java.io.FileInputStream
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import java.io.PrintStream
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import java.security.SecureRandom
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import java.util.*
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import java.util.zip.GZIPOutputStream
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import javax.crypto.Cipher
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import javax.crypto.CipherOutputStream
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import javax.crypto.spec.IvParameterSpec
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import javax.crypto.spec.SecretKeySpec
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// Set non-zero value here to fix the random seed to create reproducible builds
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const val RAND_SEED = 0
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private lateinit var RANDOM: Random
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private val c1 = mutableListOf<String>()
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private val c2 = mutableListOf<String>()
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private val c3 = mutableListOf<String>()
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fun initRandom(dict: File) {
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RANDOM = if (RAND_SEED != 0) Random(RAND_SEED.toLong()) else SecureRandom()
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c1.clear()
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c2.clear()
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c3.clear()
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for (a in chain('a'..'z', 'A'..'Z')) {
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if (a != 'a' && a != 'A') {
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c1.add("$a")
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}
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for (b in chain('a'..'z', 'A'..'Z', '0'..'9')) {
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c2.add("$a$b")
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for (c in chain('a'..'z', 'A'..'Z', '0'..'9')) {
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c3.add("$a$b$c")
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}
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}
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}
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c1.shuffle(RANDOM)
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c2.shuffle(RANDOM)
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c3.shuffle(RANDOM)
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PrintStream(dict).use {
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for (c in chain(c1, c2, c3)) {
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it.println(c)
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}
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}
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}
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private fun <T> chain(vararg iters: Iterable<T>) = sequence {
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iters.forEach { it.forEach { v -> yield(v) } }
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}
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private fun PrintStream.byteField(name: String, bytes: ByteArray) {
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println("public static byte[] $name() {")
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print("byte[] buf = {")
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print(bytes.joinToString(",") { "(byte)(${it.toInt() and 0xff})" })
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println("};")
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println("return buf;")
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println("}")
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}
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fun genKeyData(keysDir: File, outSrc: File) {
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outSrc.parentFile.mkdirs()
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PrintStream(outSrc).use {
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it.println("package com.topjohnwu.magisk.signing;")
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it.println("public final class KeyData {")
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it.byteField("testCert", File(keysDir, "testkey.x509.pem").readBytes())
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it.byteField("testKey", File(keysDir, "testkey.pk8").readBytes())
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it.byteField("verityCert", File(keysDir, "verity.x509.pem").readBytes())
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it.byteField("verityKey", File(keysDir, "verity.pk8").readBytes())
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it.println("}")
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}
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}
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fun genStubManifest(srcDir: File, outDir: File): String {
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class Component(
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val real: String,
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val stub: String,
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val xml: String
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)
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outDir.deleteRecursively()
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val mainPkgDir = File(outDir, "com/topjohnwu/magisk")
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mainPkgDir.mkdirs()
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fun String.ind(level: Int) = replaceIndentByMargin(" ".repeat(level))
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val cmpList = mutableListOf<Component>()
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cmpList.add(Component(
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"androidx.core.app.CoreComponentFactory",
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"DelegateComponentFactory",
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""
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))
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cmpList.add(Component(
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"com.topjohnwu.magisk.core.App",
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"DelegateApplication",
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""
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))
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cmpList.add(Component(
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"com.topjohnwu.magisk.core.Provider",
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"FileProvider",
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"""
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|<provider
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| android:name="%s"
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| android:authorities="${'$'}{applicationId}.provider"
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| android:directBootAware="true"
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| android:exported="false"
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| android:grantUriPermissions="true" />""".ind(2)
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))
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cmpList.add(Component(
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"com.topjohnwu.magisk.core.Receiver",
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"dummy.DummyReceiver",
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"""
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|<receiver
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| android:name="%s"
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| android:directBootAware="true"
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| android:exported="false">
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| <intent-filter>
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| <action android:name="android.intent.action.LOCALE_CHANGED" />
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| <action android:name="android.intent.action.UID_REMOVED" />
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| </intent-filter>
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| <intent-filter>
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| <action android:name="android.intent.action.PACKAGE_REPLACED" />
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| <action android:name="android.intent.action.PACKAGE_FULLY_REMOVED" />
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|
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| <data android:scheme="package" />
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| </intent-filter>
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|</receiver>""".ind(2)
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))
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cmpList.add(Component(
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"com.topjohnwu.magisk.core.SplashActivity",
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"DownloadActivity",
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"""
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|<activity
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| android:name="%s"
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| android:exported="true">
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| <intent-filter>
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| <action android:name="android.intent.action.MAIN" />
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| <category android:name="android.intent.category.LAUNCHER" />
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| </intent-filter>
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|</activity>""".ind(2)
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))
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cmpList.add(Component(
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"com.topjohnwu.magisk.ui.MainActivity",
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"",
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"""|<activity android:name="%s" />""".ind(2)
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))
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cmpList.add(Component(
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"com.topjohnwu.magisk.ui.surequest.SuRequestActivity",
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"",
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"""
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|<activity
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| android:name="%s"
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| android:directBootAware="true"
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| android:excludeFromRecents="true"
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| android:exported="false"
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| tools:ignore="AppLinkUrlError">
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| <intent-filter>
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| <action android:name="android.intent.action.VIEW"/>
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| <category android:name="android.intent.category.DEFAULT"/>
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| </intent-filter>
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|</activity>""".ind(2)
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))
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cmpList.add(Component(
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"com.topjohnwu.magisk.core.download.DownloadService",
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"",
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"""|<service android:name="%s" />""".ind(2)
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))
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cmpList.add(Component(
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"androidx.work.impl.background.systemjob.SystemJobService",
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"",
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"""
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|<service
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| android:name="%s"
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| android:directBootAware="false"
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| android:enabled="true"
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| android:exported="true"
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| android:permission="android.permission.BIND_JOB_SERVICE" />""".ind(2)
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))
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val names = mutableListOf<String>()
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names.addAll(c1)
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names.addAll(c2.subList(0, 10))
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names.addAll(c3.subList(0, 10))
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names.shuffle(RANDOM)
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var idx = 0
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fun genCmpName(): String {
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val name = "${names[idx++]}.${names[idx++]}"
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return name[0].toLowerCase() + name.substring(1)
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}
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fun genClass(clzName: String, type: String) {
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val (pkg, name) = clzName.split('.')
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PrintStream(File(mainPkgDir, "$name.java")).use {
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it.println("package $pkg;")
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it.println("public class $name extends com.topjohnwu.magisk.$type {}")
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}
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}
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val cmps = mutableListOf<String>()
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val usedNames = mutableListOf<String>()
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val maps = StringBuilder()
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for (gen in cmpList) {
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val name = genCmpName()
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usedNames.add(name)
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maps.append("|map.put(\"$name\", \"${gen.real}\");".ind(2))
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maps.append('\n')
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if (gen.stub.isNotEmpty()) {
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if (gen.stub != "DelegateComponentFactory") {
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maps.append("|internalMap.put(\"$name\", com.topjohnwu.magisk.${gen.stub}.class);".ind(2))
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maps.append('\n')
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}
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if (gen.stub.startsWith("Delegate")) {
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genClass(name, gen.stub)
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}
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}
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if (gen.xml.isNotEmpty()) {
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cmps.add(gen.xml.format(name))
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}
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}
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// Shuffle the order of the components
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cmps.shuffle(RANDOM)
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val xml = File(srcDir, "AndroidManifest.xml").readText()
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val genXml = xml.format(usedNames[0], usedNames[1], cmps.joinToString("\n\n"))
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// Write mapping information to code
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val mapping = File(srcDir, "Mapping.java").readText().format(maps)
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PrintStream(File(mainPkgDir, "Mapping.java")).use {
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it.print(mapping)
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}
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return genXml
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}
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fun genEncryptedResources(res: File, outDir: File) {
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val mainPkgDir = File(outDir, "com/topjohnwu/magisk")
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// Rename R.java
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val r = File(mainPkgDir, "R.java").let {
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val txt = it.readText()
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it.delete()
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txt
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}
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File(mainPkgDir, "A.java").writeText(r.replace("class R", "class A"))
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// Generate iv and key
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val iv = ByteArray(16)
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val key = ByteArray(32)
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RANDOM.nextBytes(iv)
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RANDOM.nextBytes(key)
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val cipher = Cipher.getInstance("AES/CBC/PKCS5Padding")
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cipher.init(Cipher.ENCRYPT_MODE, SecretKeySpec(key, "AES"), IvParameterSpec(iv))
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val bos = ByteArrayOutputStream()
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FileInputStream(res).use {
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// First compress, then encrypt
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GZIPOutputStream(CipherOutputStream(bos, cipher)).use { os ->
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it.transferTo(os)
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}
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}
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PrintStream(File(mainPkgDir, "Bytes.java")).use {
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it.println("package com.topjohnwu.magisk;")
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it.println("public final class Bytes {")
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it.byteField("key", key)
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it.byteField("iv", iv)
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it.byteField("res", bos.toByteArray())
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it.println("}")
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}
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}
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