78 lines
2.4 KiB
Java
78 lines
2.4 KiB
Java
package the.bytecode.club.bytecodeviewer.api;
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import org.objectweb.asm.ClassReader;
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import org.objectweb.asm.ClassWriter;
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import org.objectweb.asm.tree.ClassNode;
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import org.objectweb.asm.tree.MethodNode;
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/***************************************************************************
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* Bytecode Viewer (BCV) - Java & Android Reverse Engineering Suite *
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* Copyright (C) 2014 Kalen 'Konloch' Kinloch - http://bytecodeviewer.com *
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* *
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* This program is free software: you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation, either version 3 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program. If not, see <http://www.gnu.org/licenses/>. *
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***************************************************************************/
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/**
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* @author Konloch
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* @since 6/27/2021
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*/
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public class ASMUtil
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{
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/**
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* Creates a new ClassNode instances from the provided byte[]
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*/
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public static ClassNode bytesToNode(final byte[] b)
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{
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ClassReader cr = new ClassReader(b);
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ClassNode cn = new ClassNode();
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try {
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cr.accept(cn, ClassReader.EXPAND_FRAMES);
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} catch (Exception e) {
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cr.accept(cn, ClassReader.SKIP_FRAMES);
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}
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return cn;
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}
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/**
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* Writes a valid byte[] from the provided classnode
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*/
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public static byte[] nodeToBytes(ClassNode cn)
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{
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final ClassWriter cw = new ClassWriter(0);
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try {
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cn.accept(cw);
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} catch (Exception e) {
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e.printStackTrace();
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try {
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Thread.sleep(200);
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cn.accept(cw);
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} catch (InterruptedException ignored) { }
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}
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return cw.toByteArray();
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}
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public static MethodNode getMethodByName(ClassNode cn, String name)
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{
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for(MethodNode m : cn.methods)
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{
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if(m.name.equals(name))
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return m;
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}
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return null;
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}
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}
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