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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import java.util.Base64;
public class Main {
/**
* base64 encoded class/dex file for
* class Transform {
* public void sayHi() {
* System.out.println("hello");
* }
* }
*/
private static final byte[] CLASS_BYTES_A = Base64.getDecoder().decode(
"yv66vgAAADQAHAoABgAOCQAPABAIABEKABIAEwcAFAcAFQEABjxpbml0PgEAAygpVgEABENvZGUB" +
"AA9MaW5lTnVtYmVyVGFibGUBAAVzYXlIaQEAClNvdXJjZUZpbGUBAA5UcmFuc2Zvcm0uamF2YQwA" +
"BwAIBwAWDAAXABgBAAVoZWxsbwcAGQwAGgAbAQAJVHJhbnNmb3JtAQAQamF2YS9sYW5nL09iamVj" +
"dAEAEGphdmEvbGFuZy9TeXN0ZW0BAANvdXQBABVMamF2YS9pby9QcmludFN0cmVhbTsBABNqYXZh" +
"L2lvL1ByaW50U3RyZWFtAQAHcHJpbnRsbgEAFShMamF2YS9sYW5nL1N0cmluZzspVgAgAAUABgAA" +
"AAAAAgAAAAcACAABAAkAAAAdAAEAAQAAAAUqtwABsQAAAAEACgAAAAYAAQAAABEAAQALAAgAAQAJ" +
"AAAAJQACAAEAAAAJsgACEgO2AASxAAAAAQAKAAAACgACAAAAGgAIABsAAQAMAAAAAgAN");
private static final byte[] DEX_BYTES_A = Base64.getDecoder().decode(
"ZGV4CjAzNQC6XWInnnDd1H4NdQ3P3inH8eCVmQI6W7LMAgAAcAAAAHhWNBIAAAAAAAAAACwCAAAO" +
"AAAAcAAAAAYAAACoAAAAAgAAAMAAAAABAAAA2AAAAAQAAADgAAAAAQAAAAABAACsAQAAIAEAAGIB" +
"AABqAQAAdwEAAI4BAACiAQAAtgEAAMoBAADaAQAA3QEAAOEBAAD1AQAA/AEAAAECAAAKAgAAAQAA" +
"AAIAAAADAAAABAAAAAUAAAAHAAAABwAAAAUAAAAAAAAACAAAAAUAAABcAQAABAABAAsAAAAAAAAA" +
"AAAAAAAAAAANAAAAAQABAAwAAAACAAAAAAAAAAAAAAAAAAAAAgAAAAAAAAAGAAAAAAAAABwCAAAA" +
"AAAAAQABAAEAAAARAgAABAAAAHAQAwAAAA4AAwABAAIAAAAWAgAACQAAAGIAAAAbAQoAAABuIAIA" +
"EAAOAAAAAQAAAAMABjxpbml0PgALTFRyYW5zZm9ybTsAFUxqYXZhL2lvL1ByaW50U3RyZWFtOwAS" +
"TGphdmEvbGFuZy9PYmplY3Q7ABJMamF2YS9sYW5nL1N0cmluZzsAEkxqYXZhL2xhbmcvU3lzdGVt" +
"OwAOVHJhbnNmb3JtLmphdmEAAVYAAlZMABJlbWl0dGVyOiBqYWNrLTQuMjIABWhlbGxvAANvdXQA" +
"B3ByaW50bG4ABXNheUhpABEABw4AGgAHDocAAAABAQCAgASgAgEBuAIAAA0AAAAAAAAAAQAAAAAA" +
"AAABAAAADgAAAHAAAAACAAAABgAAAKgAAAADAAAAAgAAAMAAAAAEAAAAAQAAANgAAAAFAAAABAAA" +
"AOAAAAAGAAAAAQAAAAABAAABIAAAAgAAACABAAABEAAAAQAAAFwBAAACIAAADgAAAGIBAAADIAAA" +
"AgAAABECAAAAIAAAAQAAABwCAAAAEAAAAQAAACwCAAA=");
/**
* base64 encoded class/dex file for
* class Transform {
* public void sayHi() {
* System.out.println("Goodbye");
* }
* }
*/
private static final byte[] CLASS_BYTES_B = Base64.getDecoder().decode(
"yv66vgAAADQAHAoABgAOCQAPABAIABEKABIAEwcAFAcAFQEABjxpbml0PgEAAygpVgEABENvZGUB" +
"AA9MaW5lTnVtYmVyVGFibGUBAAVzYXlIaQEAClNvdXJjZUZpbGUBAA5UcmFuc2Zvcm0uamF2YQwA" +
"BwAIBwAWDAAXABgBAAdHb29kYnllBwAZDAAaABsBAAlUcmFuc2Zvcm0BABBqYXZhL2xhbmcvT2Jq" +
"ZWN0AQAQamF2YS9sYW5nL1N5c3RlbQEAA291dAEAFUxqYXZhL2lvL1ByaW50U3RyZWFtOwEAE2ph" +
"dmEvaW8vUHJpbnRTdHJlYW0BAAdwcmludGxuAQAVKExqYXZhL2xhbmcvU3RyaW5nOylWACAABQAG" +
"AAAAAAACAAAABwAIAAEACQAAAB0AAQABAAAABSq3AAGxAAAAAQAKAAAABgABAAAAEQABAAsACAAB" +
"AAkAAAAlAAIAAQAAAAmyAAISA7YABLEAAAABAAoAAAAKAAIAAAATAAgAFAABAAwAAAACAA0=");
private static final byte[] DEX_BYTES_B = Base64.getDecoder().decode(
"ZGV4CjAzNQCLXSBQ5FiS3f16krSYZFF8xYZtFVp0GRXMAgAAcAAAAHhWNBIAAAAAAAAAACwCAAAO" +
"AAAAcAAAAAYAAACoAAAAAgAAAMAAAAABAAAA2AAAAAQAAADgAAAAAQAAAAABAACsAQAAIAEAAGIB" +
"AABqAQAAcwEAAIABAACXAQAAqwEAAL8BAADTAQAA4wEAAOYBAADqAQAA/gEAAAMCAAAMAgAAAgAA" +
"AAMAAAAEAAAABQAAAAYAAAAIAAAACAAAAAUAAAAAAAAACQAAAAUAAABcAQAABAABAAsAAAAAAAAA" +
"AAAAAAAAAAANAAAAAQABAAwAAAACAAAAAAAAAAAAAAAAAAAAAgAAAAAAAAAHAAAAAAAAAB4CAAAA" +
"AAAAAQABAAEAAAATAgAABAAAAHAQAwAAAA4AAwABAAIAAAAYAgAACQAAAGIAAAAbAQEAAABuIAIA" +
"EAAOAAAAAQAAAAMABjxpbml0PgAHR29vZGJ5ZQALTFRyYW5zZm9ybTsAFUxqYXZhL2lvL1ByaW50" +
"U3RyZWFtOwASTGphdmEvbGFuZy9PYmplY3Q7ABJMamF2YS9sYW5nL1N0cmluZzsAEkxqYXZhL2xh" +
"bmcvU3lzdGVtOwAOVHJhbnNmb3JtLmphdmEAAVYAAlZMABJlbWl0dGVyOiBqYWNrLTMuMzYAA291" +
"dAAHcHJpbnRsbgAFc2F5SGkAEQAHDgATAAcOhQAAAAEBAICABKACAQG4Ag0AAAAAAAAAAQAAAAAA" +
"AAABAAAADgAAAHAAAAACAAAABgAAAKgAAAADAAAAAgAAAMAAAAAEAAAAAQAAANgAAAAFAAAABAAA" +
"AOAAAAAGAAAAAQAAAAABAAABIAAAAgAAACABAAABEAAAAQAAAFwBAAACIAAADgAAAGIBAAADIAAA" +
"AgAAABMCAAAAIAAAAQAAAB4CAAAAEAAAAQAAACwCAAA=");
public static void main(String[] args) {
doTest(new Transform());
}
public static void doTest(Transform t) {
// TODO We currently need to do this transform call since we don't have any way to make the
// original-dex-file a single-class dex-file letting us restore it easily. We should use the
// manipulation library that is being made when we store the original dex file.
// TODO REMOVE this theoretically does nothing but it ensures the original-dex-file we have set
// is one we can return to unaltered.
doCommonClassRedefinition(Transform.class, CLASS_BYTES_A, DEX_BYTES_A);
t.sayHi();
// Now turn it into DEX_BYTES_B so it says 'Goodbye'
addCommonTransformationResult("Transform", CLASS_BYTES_B, DEX_BYTES_B);
enableCommonRetransformation(true);
doCommonClassRetransformation(Transform.class);
t.sayHi();
// Now turn it back to normal by removing the load-hook and transforming again.
enableCommonRetransformation(false);
doCommonClassRetransformation(Transform.class);
t.sayHi();
}
// Transforms the class
private static native void doCommonClassRedefinition(Class<?> target,
byte[] class_bytes,
byte[] dex_bytes);
private static native void doCommonClassRetransformation(Class<?>... target);
private static native void enableCommonRetransformation(boolean enable);
private static native void addCommonTransformationResult(String target_name,
byte[] class_bytes,
byte[] dex_bytes);
}
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