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/*
* Copyright (C) 2017 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;
import java.lang.reflect.Method;
public class Main {
/**
* base64 encoded class/dex file for
* class Transform {
* public void sayHi() {
* System.out.println("Goodbye");
* }
* }
*/
private static final byte[] CLASS_BYTES = Base64.getDecoder().decode(
"yv66vgAAADQAHAoABgAOCQAPABAIABEKABIAEwcAFAcAFQEABjxpbml0PgEAAygpVgEABENvZGUB" +
"AA9MaW5lTnVtYmVyVGFibGUBAAVzYXlIaQEAClNvdXJjZUZpbGUBAA5UcmFuc2Zvcm0uamF2YQwA" +
"BwAIBwAWDAAXABgBAAdHb29kYnllBwAZDAAaABsBAAlUcmFuc2Zvcm0BABBqYXZhL2xhbmcvT2Jq" +
"ZWN0AQAQamF2YS9sYW5nL1N5c3RlbQEAA291dAEAFUxqYXZhL2lvL1ByaW50U3RyZWFtOwEAE2ph" +
"dmEvaW8vUHJpbnRTdHJlYW0BAAdwcmludGxuAQAVKExqYXZhL2xhbmcvU3RyaW5nOylWACAABQAG" +
"AAAAAAACAAAABwAIAAEACQAAAB0AAQABAAAABSq3AAGxAAAAAQAKAAAABgABAAAAEQABAAsACAAB" +
"AAkAAAAlAAIAAQAAAAmyAAISA7YABLEAAAABAAoAAAAKAAIAAAATAAgAFAABAAwAAAACAA0=");
private static final byte[] DEX_BYTES = 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) {
try {
Method say_hi_method = t.getClass().getDeclaredMethod("sayHi");
say_hi_method.invoke(t);
doCommonClassRedefinition(Transform.class, CLASS_BYTES, DEX_BYTES);
say_hi_method.invoke(t);
} catch (Exception e) {
e.printStackTrace();
}
}
// Transforms the class
private static native void doCommonClassRedefinition(Class<?> target,
byte[] class_file,
byte[] dex_file);
}
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