前言
使用的技术和上文的一样。
mips 版本的修改版
修改版：
https://gitee.com/hac425/jeb-mips
正文
安卓版
jeb-2.3.7.201710262129-JEBDecompilerDemo-121820464987384338
重新编译一个 com.pnfsoftware.jeb.client.Licensing
//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by Fernflower decompiler)
//
package com.pnfsoftware.jeb.client;
import com.pnfsoftware.jeb.AssetManager;
import com.pnfsoftware.jeb.util.format.Strings;
import com.pnfsoftware.jeb.util.logging.GlobalLog;
import com.pnfsoftware.jeb.util.logging.ILogger;
import com.pnfsoftware.jebglobal.GN;
import com.pnfsoftware.jebglobal.mW;
public final class Licensing {
private static final ILogger logger = GlobalLog.getLogger(Licensing.class);
public static final String user_email = "[email protected]";
public static final String user_group = "hacker";
public static final int user_id = 2116188757;
public static final String user_name = "hac425";
public static final int user_count = 20;
public static final int license_ts = 0;
public static final int license_validity = 40000;
public static int real_license_ts = 0;
public static int build_type = 0;
public static final int FLAG_AIRGAP = 8;
public static final int FLAG_ANYCLIENT = 16;
public static final int FLAG_COREAPI = 32;
public static final int FLAG_DEBUG = 1;
public static final int FLAG_FLOATING = 4;
public static final int FLAG_FULL = 2;
public static final int FLAG_JEB2 = 128;
static {
int v0 = Licensing.build_type | 2;
Licensing.build_type = v0;
v0 |= 4;
Licensing.build_type = v0;
v0 |= 8;
Licensing.build_type = v0;
v0 |= 16;
Licensing.build_type = v0;
v0 |= 32;
Licensing.build_type = v0;
Licensing.build_type = v0 | 128;
}
public Licensing() {
}
public static final void setLicenseTimestamp(int var0) {
real_license_ts = 1505267330;
}
public static final int getExpirationTimestamp() {
return real_license_ts + 345600000;
}
public static final int getBuildType() {
return build_type;
}
public static final boolean isDebugBuild() {
return true;
}
public static final boolean isReleaseBuild() {
return !isDebugBuild();
}
public static final boolean isFullBuild() {
return true;
}
public static final boolean isDemoBuild() {
return !isFullBuild();
}
public static final boolean isFloatingBuild() {
return (build_type & 4) != 0;
}
public static final boolean isIndividualBuild() {
return !isFloatingBuild();
}
public static final boolean isAirgapBuild() {
return (build_type & 8) != 0;
}
public static final boolean isInternetRequired() {
return false;
}
public static final boolean allowAnyClient() {
return (build_type & 16) != 0;
}
public static final boolean canUseCoreAPI() {
return true;
}
public static final String getBuildTypeString() {
StringBuilder var0 = new StringBuilder();
if (isReleaseBuild()) {
var0.append(mW.UU(new byte[]{-119, 23, 9, 9, 4, 18, 22, 74}, 1, 251));
} else {
var0.append(mW.UU(new byte[]{35, 1, 7, 23, 18, 72}, 1, 71));
}
if (isFullBuild()) {
var0.append(mW.UU(new byte[]{37, 26, 28, 21, 93}, 2, 39));
} else {
var0.append(mW.UU(new byte[]{39, 10, 29, 22, 93}, 2, 200));
}
if (isFloatingBuild()) {
var0.append(mW.UU(new byte[]{-114, 10, 3, 14, 21, 29, 7, 9, 72}, 1, 232));
} else {
var0.append(mW.UU(new byte[]{42, 1, 20, 16, 4, 0, 3, 29, 21, 76, 7}, 2, 150));
}
if (isAirgapBuild()) {
var0.append(mW.UU(new byte[]{34, 6, 2, 84, 21, 8, 23, 71}, 2, 100));
} else {
var0.append(mW.UU(new byte[]{8, 23, 20, 92, 68, 7, 26, 17, 23, 28, 11, 17, 91}, 1, 122));
}
if (allowAnyClient()) {
var0.append(mW.UU(new byte[]{82, 15, 23, 84, 78, 15, 5, 12, 11, 26, 91}, 1, 51));
} else {
var0.append(mW.UU(new byte[]{-85, 9, 0, 15, 10, 10, 8, 13, 65, 78, 15, 5, 12, 11, 26, 91}, 1, 196));
}
if (canUseCoreAPI()) {
var0.append(mW.UU(new byte[]{32, 0, 2, 28, 95, 8, 23, 1}, 2, 169));
} else {
var0.append(mW.UU(new byte[]{-27, 1, 66, 78, 12, 29, 23, 72, 76, 17, 25}, 1, 139));
}
return var0.toString();
}
public static String getLicense() {
byte[] var0 = AssetManager.UU("LICENSE.TXT");
return var0 == null ? null : Strings.decodeUTF8(var0);
}
public static String getChangeList() {
byte[] var0 = AssetManager.UU("CHANGELIST.TXT");
return var0 == null ? null : Strings.decodeUTF8(var0);
}
}
然后patch掉退出函数和更新检测
package me.hacklh;
import com.pnfsoftware.jeb.Launcher;
import javassist.ClassPool;
import javassist.CtClass;
import javassist.CtMethod;
import javassist.CtNewMethod;
import com.pnfsoftware.jeb.client.Licensing;
public class JebCracker {
public static void main(String[] args) throws Exception {
// com.pnfsoftware.jeb.installer.Launcher.main(new String[]{"--di"});
// DES.main(args);
// Launcher.main(new String[]{"--generate-key"});
CtClass.debugDump = "./debugDump/";
System.out.println(Licensing.allowAnyClient());
/**
* 修改getStatus， AbstractContext会起几个线程修改status
*/
ClassPool pool = ClassPool.getDefault();
pool.importPackage("com.pnfsoftware.jeb.client.AbstractContext");
CtClass old_class = pool.get("com.pnfsoftware.jeb.client.AbstractContext");
old_class.detach();
CtMethod old_method = old_class.getDeclaredMethod
(
"getStatus",
new CtClass[]
{
}
);
old_method.setBody("return 0;");
old_method = old_class.getDeclaredMethod
(
"terminate",
new CtClass[]
{
}
);
old_method.setBody(";");
old_class.writeFile();
/**
* patch 掉与网络下载有关的函数，禁止升级
*/
pool = ClassPool.getDefault();
pool.importPackage("com.pnfsoftware.jeb.util.net.Net");
old_class = pool.get("com.pnfsoftware.jeb.util.net.Net");
old_class.detach();
old_method = old_class.getDeclaredMethod
(
"downloadBinary",
new CtClass[]
{
pool.get(String.class.getName())
}
);
old_method.setBody("return null;");
old_method = old_class.getDeclaredMethod
(
"httpPost",
new CtClass[]
{
pool.get(String.class.getName()),
pool.get(String.class.getName()),
pool.get(long[].class.getName())
}
);
old_method.setBody("return null;");
old_class.writeFile();
}
}
mips版
类似
最后
可以在jeb的官网下载其他平台的适配包
https://www.pnfsoftware.com/jeb2/support-package