package com.whyc;
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import com.whyc.util.*;
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import com.whyc.util.*;
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import java.io.ByteArrayInputStream;
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import java.io.File;
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import java.io.InputStream;
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/**
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* java class解密
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*
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* @author perry
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*/
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public class JarDecryptor {
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//单例
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private static final JarDecryptor single = new JarDecryptor();
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//机器码
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private char[] code;
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//加密后文件存放位置
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private static final String ENCRYPT_PATH = "META-INF/" + Const.FILE_NAME + "/";
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//加密后文件存放位置
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private static final String DESCRIPTION_PATH = "META-INF/";
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/**
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* 单例
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*
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* @return 单例
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*/
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public static JarDecryptor getInstance() {
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return single;
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}
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/**
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* 构造
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*/
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public JarDecryptor() {
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this.code = SysUtils.makeMarchinCode();
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}
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/**
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* 根据名称解密出一个文件
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*
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* @param projectPath 项目所在的路径
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* @param fileName 文件名
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* @param password 密码
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* @return 解密后的字节
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*/
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public byte[] doDecrypt(String projectPath, String fileName, char[] password) {
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long t1 = System.currentTimeMillis();
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File workDir = new File(projectPath);
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byte[] bytes = readEncryptedFile(workDir, fileName);
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if (bytes == null) {
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return null;
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}
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//读取机器码，有机器码，先用机器码解密
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byte[] codeBytes = readEncryptedFile(workDir, Const.CONFIG_CODE);
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if (codeBytes != null) {
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//本机器码和打包的机器码不匹配
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if (!StrUtils.equal(EncryptUtils.md5(this.code), StrUtils.toChars(codeBytes))) {
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Log.println("该项目不可在此机器上运行!\n");
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System.exit(-1);
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}
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//用机器码解密
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char[] pass = StrUtils.merger(fileName.toCharArray(), code);
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bytes = EncryptUtils.de(bytes, pass, Const.ENCRYPT_TYPE);
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}
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//无密码启动,读取隐藏的密码
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if (password.length == 1 && password[0] == '#') {
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password = readPassFromJar(workDir);
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}
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//密码解密
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char[] pass = StrUtils.merger(password, fileName.toCharArray());
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bytes = EncryptUtils.de(bytes, pass, Const.ENCRYPT_TYPE);
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long t2 = System.currentTimeMillis();
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Log.debug("解密: " + fileName + " (" + (t2 - t1) + " ms)");
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return bytes;
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}
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/**
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* 在jar文件或目录中读取文件字节
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*
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* @param workDir jar文件或目录
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* @param name 文件名
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* @return 文件字节数组
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*/
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public static byte[] readEncryptedFile(File workDir, String name) {
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byte[] bytes = null;
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String fileName = ENCRYPT_PATH + name;
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//jar文件
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if (workDir.isFile()) {
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bytes = JarUtils.getFileFromJar(workDir, fileName);
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} else {//war解压的目录
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File file = new File(workDir, fileName);
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if (file.exists()) {
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bytes = IoUtils.readFileToByte(file);
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}
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}
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return bytes;
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}
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/**
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* 在jar文件或目录中读取密码字节
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*
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* @param workDir jar文件或目录
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* @param name 文件名
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* @return 文件字节数组
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*/
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public static byte[] readEncryptedFile2(File workDir, String name) {
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byte[] bytes = null;
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String fileName = DESCRIPTION_PATH + name;
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//jar文件
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if (workDir.isFile()) {
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bytes = JarUtils.getFileFromJar(workDir, fileName);
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} else {//war解压的目录
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File file = new File(workDir, fileName);
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if (file.exists()) {
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bytes = IoUtils.readFileToByte(file);
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}
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}
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return bytes;
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}
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/**
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* 读取隐藏在jar的密码
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*
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* @param workDir jar路径
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* @return 密码char
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*/
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public static char[] readPassFromJar(File workDir) {
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byte[] passbyte = readEncryptedFile(workDir, Const.CONFIG_PASS);
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if (passbyte != null) {
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char[] pass = StrUtils.toChars(passbyte);
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return EncryptUtils.md5(pass);
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}
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return null;
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}
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/**
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* 读取隐藏在jar的密码
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*
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* @param workDir jar路径
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* @return 密码char
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*/
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public static char[] readPassFromJar2(File workDir) {
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byte[] passbyte = readEncryptedFile2(workDir, Const.FILE_NAME2);
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if (passbyte != null) {
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char[] pass = StrUtils.toChars(passbyte);
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return EncryptUtils.md5(pass);
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}
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return null;
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}
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/**
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* 解密配置文件，spring读取文件时调用
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*
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* @param path 配置文件路径
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* @param in 输入流
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* @return 解密的输入流
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*/
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public InputStream decryptConfigFile(String path, InputStream in, char[] pass) {
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if (path.endsWith(".class")) {
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return in;
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}
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String projectPath = JarUtils.getRootPath(null);
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if (StrUtils.isEmpty(projectPath)) {
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return in;
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}
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byte[] bytes = null;
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try {
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bytes = IoUtils.toBytes(in);
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} catch (Exception e) {
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}
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if (bytes == null || bytes.length == 0) {//需要解密
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bytes = this.doDecrypt(projectPath, path, pass);
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}
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if (bytes == null) {
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return in;
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}
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in = new ByteArrayInputStream(bytes);
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return in;
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}
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}
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