ThingsBoard PE版破解

ThingsBoard是一款开源的IOT平台，有CE,PE两个版本，PE版需要付费，功能也更加丰富。为了体验下PE版的功能，尝试着对
PE版进行破解。

1. 按照官方文档进行安装，跳过步骤中的填写license部分

2. 启动服务，当然此时是无法访问的。查看日志thingsboard.log发现最后有如下提示

    2019-12-24 09:14:50,056 [main] ERROR o.t.s.d.s.BasicSubscriptionService - License secret is not provided!
    2019-12-24 09:14:50,057 [main] ERROR o.t.s.d.s.BasicSubscriptionService - Please provide license.secret property value in thingsboard.yml or set TB_LICENSE_SECRET environment variable!
    2019-12-24 09:14:50,156 [Shutdown Thread] INFO  o.t.s.d.s.BasicSubscriptionService - Terminating application due to critical License Error GENERAL_ERROR(300), exit code [-1]...

   这里提示BasicSubscriptionService这个类中进行了license的检验，但是上面没有显示改类包路径，无法精确定位到改类的位置。

3. 为了精确定位BasicSubscriptionService这个类的位置，对conf/logback.xml进行修改，将日志长度改大一点

   <encoder>
      <pattern>%d{ISO8601} [%thread] %-5level %logger{255} - %msg%n</pattern>
   </encoder>

4. 再次重启服务，查看日志

   2019-12-24 09:32:58,495 [main] ERROR org.thingsboard.server.dao.subscription.BasicSubscriptionService - License secret is not provided!
   2019-12-24 09:32:58,497 [main] ERROR org.thingsboard.server.dao.subscription.BasicSubscriptionService - Please provide license.secret property value in thingsboard.yml or set TB_LICENSE_SECRET environment variable!
   2019-12-24 09:32:58,504 [Shutdown Thread] INFO  org.thingsboard.server.dao.subscription.BasicSubscriptionService - Terminating application due to critical License Error GENERAL_ERROR(300), exit code [-1]...

   发现org.thingsboard.server.dao.subscription.BasicSubscriptionService这个类是再dao包下，解压lib/thingsboard.jar，找到依赖的dao-2.4.2PE.jar，解压找到BasicSubscriptionService
   最后发现检查license的地方在这里:

   @PostConstruct
      public void init() {
          if (StringUtils.isEmpty(this.licenseSecret)) {
              log.error("License secret is not provided!");
              log.error("Please provide license.secret property value in thingsboard.yml or set TB_LICENSE_SECRET environment variable!");
              this.doExit(-1, LicenseErrorCode.GENERAL_ERROR, false);
          } else {
              try {
                  this.tbLicenseClient = TbLicenseClient.builder().listener(this).licenseSecret(this.licenseSecret).releaseDate((new SimpleDateFormat("yyyy-MM-dd")).parse("2019-09-13").getTime()).build();
                  this.tbLicenseClient.init();
              } catch (Exception var3) {
                  log.error("Failed to init license client", var3);
                  LicenseErrorCode licenseErrorCode = var3 instanceof LicenseException ? ((LicenseException)var3).getErrorCode() : LicenseErrorCode.GENERAL_ERROR;
                  this.doExit(-1, licenseErrorCode, false);
              }
          }
   
      }

5. 尝试重写该类中方法，将验证license那部分去掉。然后将新的BasicSubscriptionService.class替换掉之前的代码。
   打开CE版的源码，在dao模块下新建subscription包，对照dao-2.4.2PE.jar中的内容，将SubscriptionService,InstallSubscriptionService,BasicSubscriptionService这3个类中的内容完全复制过来,
   再重写BasicSubscriptionService中的方法，最后内容如下：

   import org.slf4j.Logger;
   import org.slf4j.LoggerFactory;
   import org.springframework.beans.factory.annotation.Value;
   import org.springframework.context.annotation.Profile;
   import org.springframework.stereotype.Service;
   import org.thingsboard.server.common.data.id.TenantId;
   import org.thingsboard.server.common.data.subscription.SubscriptionException;
   
   import javax.annotation.PostConstruct;
   import javax.annotation.PreDestroy;
   
   @Service
   @Profile({"!install"})
   public class BasicSubscriptionService implements SubscriptionService {
       private static final Logger log = LoggerFactory.getLogger(BasicSubscriptionService.class);
       private static final String MAX_DEVICES_KEY = "maxdevices";
       private static final String MAX_ASSETS_KEY = "maxassets";
       private static final String WHITELABELING_KEY = "whitelabeling";
       @Value("${license.secret}")
       private String licenseSecret;
   
       public BasicSubscriptionService() {
       }
   
       @PostConstruct
       public void init() {
   
   

   }

   @PreDestroy
   public void stop() {

   }


   @Override
   public void createDeviceAllowed(TenantId tenantId) throws SubscriptionException {

   }

   @Override
   public void createAssetAllowed(TenantId tenantId) throws SubscriptionException {

   }

   @Override
   public void whiteLabelingAllowed(TenantId tenantId) throws SubscriptionException {

   }

   @Override
   public boolean whiteLabelingEnabled(TenantId tenantId) throws SubscriptionException {
      return true;
   }

}

(这步过程中`SubscriptionService`类中有个异常类`SubscriptionException`是在`common`模块下的，CE版中也没有这个类，需要按照路径在CE版中生成，然后重新编译`common`模块)

6. 编译`dao`模块，拿到`BasicSubscriptionService.class`

7. 重新生成`dao-2.4.2PE.jar`,使用jar命令替换，在`dao-2.4.2PE.jar`同目录下新建目录`org\thingsboard\server\dao\subscription`,将`BasicSubscriptionService.class`放到该目录下，
执行`jar uf dao-2.4.2PE.jar org\thingsboard\server\dao\subscription\BasicSubscriptionService.class`此时`dao-2.4.2PE.jar`已经更新完。

8. 重新生成`thingsboard.jar`，解压之间的`thingsboard.jar`,得到3个目录`BOOT-INF`,`META-INF`,`org`,将上一步生成的`dao-2.4.2PE.jar`放入`BOOT-INF\lib`中，
执行`jar cf0M thingsboard.jar *`生成新的jar包

9. 用新的thingsboard.jar替换掉lib中的jar包重新install或者直接执行都可以（java -jar thingsboard.jar,需要修改jar包中的yml配置文件）。