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README
Apache-2.0

代码混淆之class-winter


郑重声明

class-winter 是本人在学习完 class-final(v1.1.9) 后,仿照class-final进行编写的,部分思路与class-final一致

功能与特性

  • 支持war(普通war+可执行war)加密
  • 支持jar(普通jar+可执行jar)加密
  • 支持xml加密(掩耳盗铃版)

加密

  • 方式一:通过maven插件自动加密。

    <!--
        class-winter插件
        注:自Maven3.0.3起, 绑定到同一phase的Maven插件将按照pom.xml中声明的顺序执行
        注:此插件最好放置在同一phase的最后执行。
    -->
    <plugin>
        <groupId>com.idea-aedi</groupId>
        <artifactId>class-winter-maven-plugin</artifactId>
        <version>2.6.7</version>
        <!-- 相关配置 -->
        <configuration>
            <!-- <finalName></finalName>-->
            <includePrefix>加密范围</includePrefix>
            <!-- <originJarOrWar></originJarOrWar>-->
            <!-- <excludePrefix></excludePrefix>-->
            <!-- <includeXmlPrefix></includeXmlPrefix>-->
            <!-- <excludeXmlPrefix></excludeXmlPrefix>-->
            <!-- <toCleanXmlChildElementName></toCleanXmlChildElementName>-->
            <!-- <password></password>-->
            <!-- <includeLibs></includeLibs>-->
            <!-- <alreadyProtectedLibs></alreadyProtectedLibs>-->
            <!-- <supportFile></supportFile>-->
            <!-- <jvmArgCheck></jvmArgCheck>-->
            <!-- <tips></tips>-->
            <!-- <debug></debug>-->
        </configuration>
        <executions>
            <execution>
                <phase>package</phase>
                <goals>
                    <goal>class-winter</goal>
                </goals>
            </execution>
        </executions>
    </plugin>

    注:不必担心信息泄漏问题,使用此方式生成混淆的jar包时,会擦除pom.xml中关于class-winter-plugin的信息。

  • 方式二:通过 class-winter-core.jar 主动加密。

    java -jar class-winter-core-2.6.7.jar originJarOrWar=${要加密的项目.jar或.war包} includePrefix=${加密范围} [k3=v3 k4=v4 ...]
    # 对于复杂的参数值,可以使用引号引起来
    # linux
    java -jar class-winter-core-2.6.7.jar k1='v1' k2='v2'
    # windows
    java -jar class-winter-core-2.6.7.jar k1="v1" k2="v2"

加密参数

参数 是否必填 说明 示例
originJarOrWar 指定要加密的jar/war文件
注:当使用maven插件进行自动加密时,此参数非必填,不填则自动获取。
注:当使用maven插件进行自动加密时,可结合maven相关占位符进行相对定位。如:${project.basedir}/../../your-project.jar
originJarOrWar=/my-project.jar
includePrefix 通过前缀匹配的形式定位要加密的class
注:多个通过逗号分割。
includePrefix=com
includePrefix=com,org
excludePrefix 通过前缀匹配的形式排除class,不对其加密
注:多个通过逗号分割。
注:excludePrefix优先级高于includePrefix。
excludePrefix=com.example.service,com.example.util.StrUtil.class
includeXmlPrefix 通过打出来的包中条目的entryName前缀匹配的形式定位要加密的xml
注:多个通过逗号分割。
注:如果您打出来的加密包是准备作为一个lib包提供给第三方使用的,那么请不要使用此参数,因为解密时是不会解密项目所依赖的lib包中的xml的。
includeXmlPrefix=BOOT-INF/classes/
includeXmlPrefix=BOOT-INF/classes/com/demo/mapper/,BOOT-INF/classes/com/demo/dao/
excludeXmlPrefix 通过打出来的包中条目的entryName前缀匹配的形式排除xml,不对其加密
注:多个通过逗号分割。
excludeXmlPrefix=BOOT-INF/classes/com/demo/mapper/
excludeXmlPrefix=BOOT-INF/classes/com/demo/mapper/,BOOT-INF/classes/com/demo/dao/UserDao.xml
toCleanXmlChildElementName 加密xml中的哪些一级元素
注:默认值为resultMap,sql,insert,update,delete,select
注:多个通过逗号分割。
toCleanXmlChildElementName=select,delete,resultMap
finalName 指定加密后生成的jar包名
注:若finalName与加密的包一致,那么生成的加密后的包会覆盖原来的包。
finalName=mine-project
password 主动指定密码
注:密码不能包含空格和逗号。
password=123456
includeLibs 指定将lib包也纳入加密范围内
注:多个通过逗号分割。
注:lib中的class是否会被加密,还得由includePrefix和excludePrefix决定。
includeLibs=a.jar,b.jar
alreadyProtectedLibs 指明项目所依赖的lib中,哪些lib本身就已经是被class-winter加密了的
注:多个通过逗号分割。
注:主要用于处理第三方提供的由class-winter加密了的依赖包的场景。
注:若lib需要密码,那么需要在指定lib的同时通过冒号接上密码。
注:如果lib有密码,那么密码不能包含逗号。
alreadyProtectedLibs=a.jar,b.jar
alreadyProtectedLibs=a.jar,b.jar:pwd123
alreadyProtectedLibs=a.jar:pwd1,b.jar:pwd2
supportFile 指定一个加密辅助jar文件(或jar文件所在的目录)
注:当为目录时,该目录(含子孙目录)下的所有jar都会被作采集作为辅助文件。
注:主要用于解决因ClassNotFound导致的加密失败问题。
supportFile=/abc.jar
supportFile=/libs
jvmArgCheck 设置当启动混淆包时,必须要有的jvm参数
注:多个通过逗号分割。
注:大小写不敏感。
如:通过设置-XX:+DisableAttachMechanism防止运行时dump class,以提高安全性。
jvmArgCheck=-XX:+DisableAttachMechanism,-Xms2048M
tips 指定提示语。
注:当直接使用加密后的jar/war时,用到了加密了的类后,会先System.err.println输出此tips,然后System.exit退出程序。
windows示例:tips="请不要直接使用混淆后的jar/war"
linux示例:tips='请不要直接使用混淆后的jar/war'
debug 是否开启debug模式 debug=true

解密(启动)

通过-javaagent指定代理进行解密启动。

  • jar解密(启动)

    # 假设your-project-encrypted.jar是由class-winter加密后的包,那么你可以这么启动
    java -javaagent:/your-project-encrypted.jar -jar /your-project-encrypted.jar
    # 也可以用class-winter-core-2.6.7.jar
    # java -javaagent:/class-winter-core-2.6.7.jar -jar /your-project-encrypted.jar
    # 或者指定参数
    # java -javaagent:/your-project-encrypted.jar=debug=true,password=pwd12345 -jar /your-project-encrypted.jar
    # 参数可以引起来(linux)
    # java -javaagent:/your-project-encrypted.jar='debug=true,password=pwd12345' -jar /your-project-encrypted.jar
    # 参数可以引起来(windows)
    # java -javaagent:/your-project-encrypted.jar="debug=true,password=pwd12345" -jar /your-project-encrypted.jar
  • war解密(启动)

    以Tomcat9为例

    • linux方式一

      编辑tomcat/bin/catalina.sh文件,在最上面加上

      # 如果你有参数, 那么 -javaagent:/class-winter-core-2.6.7.jar=k1=v1,k2=v2
      CATALINA_OPTS="$CATALINA_OPTS -javaagent:/class-winter-core-2.6.7.jar=debug=true";
      export CATALINA_OPTS;
    • linux方式二

      在tomcat/bin目录下创建setenv.sh文件,并写上

      # 如果你有参数, 那么 -javaagent:/class-winter-core-2.6.7.jar=k1=v1,k2=v2
      JAVA_OPTS="$JAVA_OPTS -javaagent:/class-winter-core-2.6.7.jar=debug=true";
      export JAVA_OPTS;
    • windows方式一

      编辑tomcat/bin/catalina.bat文件,在@echo off后加上catalina参数

      rem 如果你有参数, 那么 -javaagent:D:/class-winter-core-2.6.7.jar=k1=v1,k2=v2
      set CATALINA_OPTS="-javaagent:D:/class-winter-core-2.6.7.jar"
    • windows方式二

      在tomcat/bin目录下创建setenv.bat文件,并写上

      rem 如果你有参数, 那么 -javaagent:D:/class-winter-core-2.6.7.jar=k1=v1,k2=v2
      set JAVA_OPTS="-javaagent:D:/class-winter-core-2.6.7.jar"

解密参数

参数 是否必填 说明 示例
password 指定解密密码 password=pwd123
passwordFromFile 从指定文件中读取文本作为解密密码
注:此参数由2.4.0版本开始支持
passwordFromFile=/my-pwd-file.txt
passwordFromShell 执行shell文件中的代码,并以其返货值作为解密密码
注:此参数由2.4.0版本开始支持
passwordFromShell=/my-pwd-file.shell
skipProjectPathPrefix 是否跳过指定前缀的项目路径(当class-winter解密逻辑试图解析那些进入premain但是非class-winter加密项目时,会因为获取印章失败Obtain project seal fail而停止,此时如果确认这个项目没有加密文件的话,可以使用此参数跳过)
注:此参数由2.6.4版本开始支持
skipProjectPathPrefix=/D:/apache-tomcat-9.0.71/bin/
多个通过___符号拼接:skipProjectPathPrefix=/D:/apache-tomcat-9.0.71/bin/___/D:/jd/classpath/lib/
decryptProjectPathPrefix 是否仅解密指定前缀的项目路径(优先级低于skipProjectPathPrefix)
注:此参数由2.6.7版本开始支持
decryptProjectPathPrefix=/D:/apache-tomcat-9.0.71/bin/
多个通过___符号拼接:decryptProjectPathPrefix=/D:/apache-tomcat-9.0.71/bin/___/D:/jd/classpath/lib/
debug 是否开启debug模式 debug=true

巧用loader.path

  • 需求描述

    已加密的包,如何提供给客户使用?

    • 方案一:class-winter加密时,使用alreadyProtectedLibs参数,但是要求客户的项目也需要使用class-winter加密(,哪怕客户的项目什么也不需要加密,也要求客户有使用class-winter这个动作)
    • 方案二:-Dloader.path与class-winter结合使用
  • -Dloader.path方案实现

    • 假设客户依赖了我们的加密包

      客户项目

    • 客户使用maven插件,打包时将项目代码和依赖的lib分开

      完整pom示例:

      <?xml version="1.0" encoding="UTF-8"?>
      <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
               xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
          <modelVersion>4.0.0</modelVersion>
          <parent>
              <groupId>org.springframework.boot</groupId>
              <artifactId>spring-boot-starter-parent</artifactId>
              <version>2.6.7</version>
              <relativePath/> <!-- lookup parent from repository -->
          </parent>
          <groupId>com.example</groupId>
          <artifactId>demo</artifactId>
          <version>0.0.1-SNAPSHOT</version>
          <name>demo</name>
          <description>Demo project for Spring Boot</description>
          <properties>
              <java.version>1.8</java.version>
          </properties>
          <dependencies>
              <dependency>
                  <groupId>org.springframework.boot</groupId>
                  <artifactId>spring-boot-starter-web</artifactId>
              </dependency>
      
              <dependency>
                  <groupId>org.projectlombok</groupId>
                  <artifactId>lombok</artifactId>
                  <optional>true</optional>
              </dependency>
              <dependency>
                  <groupId>org.springframework.boot</groupId>
                  <artifactId>spring-boot-starter-test</artifactId>
                  <scope>test</scope>
              </dependency>
      
              <dependency>
                  <groupId>com.demo</groupId>
                  <artifactId>encrypted-lib-no-pwd</artifactId>
                  <scope>system</scope>
                  <version>1.0.0</version>
                  <systemPath>${pom.basedir}/src/main/resources/lib/encrypted-lib-no-pwd-1.0.0.jar</systemPath>
              </dependency>
          </dependencies>
      
          <build>
              <plugins>
                  <plugin>
                      <groupId>org.springframework.boot</groupId>
                      <artifactId>spring-boot-maven-plugin</artifactId>
                      <configuration>
                          <!-- 指定该Main Class为全局的唯一入口 -->
                          <mainClass>com.ideaaedi.demo.DemoApplication</mainClass>
                          <!-- 把systemPath指定的jar包也纳入lib -->
                          <includeSystemScope>true</includeSystemScope>
                          <fork>true</fork>
                          <!-- 设置为ZIP,此模式下spring-boot-maven-plugin会将MANIFEST.MF文件中的Main-Class设置为org.springframework.boot.loader.PropertiesLauncher -->
                          <layout>ZIP</layout>
                          <includes>
                              <include>
                                  <groupId>nothing</groupId>
                                  <artifactId>nothing</artifactId>
                              </include>
                          </includes>
                      </configuration>
                      <executions>
                          <execution>
                              <goals>
                                  <goal>repackage</goal>
                              </goals>
                          </execution>
                      </executions>
                  </plugin>
      
                  <!-- 通过插件将所有依赖的lib包放到编译后的target/lib目录,并且在打包时候排除内部依赖 -->
                  <plugin>
                      <groupId>org.apache.maven.plugins</groupId>
                      <artifactId>maven-dependency-plugin</artifactId>
                      <version>3.2.0</version>
                      <executions>
                          <execution>
                              <id>copy-dependencies</id>
                              <phase>prepare-package</phase>
                              <goals>
                                  <goal>copy-dependencies</goal>
                              </goals>
                              <configuration>
                                  <outputDirectory>${project.build.directory}/lib</outputDirectory>
                                  <overWriteReleases>false</overWriteReleases>
                                  <overWriteSnapshots>false</overWriteSnapshots>
                                  <overWriteIfNewer>true</overWriteIfNewer>
                                  <includeScope>compile</includeScope>
                              </configuration>
                          </execution>
                      </executions>
                  </plugin>
              </plugins>
          </build>
      
      </project>

      打出来的包:

      打出来的包

    • 客户可以这样启动项目

      java -Dloader.path=./lib/ -javaagent:./{class-winter.jar} -jar {客户项目.jar}

      使用loader.path引入依赖

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简介

jar/war代码加密混淆,基于javaagent 展开 收起
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