init

.gitignore

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+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### IntelliJ IDEA ###
+.idea/modules.xml
+.idea/jarRepositories.xml
+.idea/compiler.xml
+.idea/libraries/
+*.iws
+*.iml
+*.ipr
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+.idea/
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store

pom.xml

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+<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.novitechie</groupId>
+    <artifactId>plugin-privacy</artifactId>
+    <version>1.0.0</version>
+
+    <properties>
+        <maven.compiler.source>8</maven.compiler.source>
+        <maven.compiler.target>8</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.7.0</version>
+                <configuration>
+                    <source>8</source>
+                    <target>8</target>
+                    <encoding>UTF-8</encoding>
+                    <compilerArgument>-XDignore.symbol.file</compilerArgument>
+                    <fork>true</fork>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-assembly-plugin</artifactId>
+                <version>3.0.0</version>
+                <configuration>
+                    <appendAssemblyId>false</appendAssemblyId>
+                    <descriptorRefs>
+                        <descriptorRef>jar-with-dependencies</descriptorRef>
+                    </descriptorRefs>
+                    <archive>
+                        <manifest>
+                            <addClasspath>true</addClasspath>
+                        </manifest>
+                        <manifestEntries>
+                            <Built-By>novice.li</Built-By>
+                            <JANF-Plugin-Entry>com.novitechie.PrivacyPlugin</JANF-Plugin-Entry>
+                        </manifestEntries>
+                    </archive>
+                    <finalName>privacy</finalName>
+                </configuration>
+                <executions>
+                    <execution>
+                        <id>make-assembly</id>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>single</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+    <dependencies>
+        <dependency>
+            <groupId>com.ja-netfilter</groupId>
+            <artifactId>ja-netfilter</artifactId>
+            <version>2.0.1</version>
+            <scope>provided</scope>
+        </dependency>
+    </dependencies>
+
+</project>

src/main/java/com/novitechie/LoadClassRule.java

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+package com.novitechie;
+
+public class LoadClassRule {
+    public static void check(String name) throws Exception {
+        if (name.startsWith("com.janetfilter")) {
+            throw new ClassNotFoundException(name);
+        }
+    }
+}

src/main/java/com/novitechie/PluginClassLoaderTransformer.java

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+package com.novitechie;
+
+import com.janetfilter.core.plugin.MyTransformer;
+import jdk.internal.org.objectweb.asm.*;
+import jdk.internal.org.objectweb.asm.commons.AdviceAdapter;
+
+import static jdk.internal.org.objectweb.asm.Opcodes.ASM5;
+
+public class PluginClassLoaderTransformer implements MyTransformer {
+    @Override
+    public String getHookClassName() {
+        return "com/intellij/ide/plugins/cl/PluginClassLoader";
+    }
+
+    @Override
+    public byte[] transform(String className, byte[] classBytes, int order) throws Exception {
+        ClassReader cr = new ClassReader(classBytes);
+        ClassWriter cw = new ClassWriter(cr, ClassWriter.COMPUTE_FRAMES);
+        cr.accept(new ClassVisitor(ASM5, cw) {
+            @Override
+            public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions) {
+                if (name.equals("loadClass")) {
+                    MethodVisitor mv = super.visitMethod(access, name, desc, signature, exceptions);
+                    return new AdviceAdapter(api, mv, access, name, desc) {
+                        @Override
+                        protected void onMethodEnter() {
+                            mv.visitVarInsn(ALOAD, 1);
+                            mv.visitMethodInsn(INVOKESTATIC, "com/novitechie/LoadClassRule", "check", "(Ljava/lang/String;)V", false);
+                        }
+                    };
+                }
+                return super.visitMethod(access, name, desc, signature, exceptions);
+            }
+        }, 6);
+        return cw.toByteArray();
+    }
+}

src/main/java/com/novitechie/PrivacyPlugin.java

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+package com.novitechie;
+
+import com.janetfilter.core.plugin.MyTransformer;
+import com.janetfilter.core.plugin.PluginEntry;
+
+import java.util.Arrays;
+import java.util.List;
+
+public class PrivacyPlugin  implements PluginEntry {
+    @Override
+    public String getName() {
+        return "PRIVACY";
+    }
+
+    @Override
+    public String getAuthor() {
+        return "novice.li";
+    }
+
+    @Override
+    public List<MyTransformer> getTransformers() {
+        return Arrays.asList(new VMOptionsTransformer(),new PluginClassLoaderTransformer());
+    }
+}

src/main/java/com/novitechie/StackTraceRule.java

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+package com.novitechie;
+
+public class StackTraceRule {
+    public static boolean check() {
+        RuntimeException e = new RuntimeException();
+        for (StackTraceElement stackTraceElement : e.getStackTrace()) {
+            if (stackTraceElement.getFileName() == null) {
+                return true;
+            }
+        }
+        return false;
+    }
+}

src/main/java/com/novitechie/VMOptionsTransformer.java

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+package com.novitechie;
+
+import com.janetfilter.core.plugin.MyTransformer;
+import jdk.internal.org.objectweb.asm.*;
+import jdk.internal.org.objectweb.asm.commons.AdviceAdapter;
+
+import static jdk.internal.org.objectweb.asm.Opcodes.ASM5;
+
+public class VMOptionsTransformer implements MyTransformer {
+    @Override
+    public String getHookClassName() {
+        return "com/intellij/diagnostic/VMOptions";
+    }
+
+    @Override
+    public byte[] transform(String className, byte[] classBytes, int order) throws Exception {
+        ClassReader cr = new ClassReader(classBytes);
+        ClassWriter cw = new ClassWriter(cr, ClassWriter.COMPUTE_FRAMES);
+        cr.accept(new ClassVisitor(ASM5, cw) {
+            @Override
+            public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions) {
+                if (name.equals("getUserOptionsFile")) {
+                    MethodVisitor mv = super.visitMethod(access, name, desc, signature, exceptions);
+                    return new AdviceAdapter(api, mv, access, name, desc) {
+                        @Override
+                        protected void onMethodEnter() {
+                            mv.visitMethodInsn(INVOKESTATIC, "com/novitechie/StackTraceRule", "check", "()Z", false);
+                            Label l0 = new Label();
+                            mv.visitJumpInsn(IFEQ, l0);
+                            mv.visitInsn(ACONST_NULL);
+                            mv.visitInsn(ARETURN);
+                            mv.visitLabel(l0);
+                        }
+                    };
+                }
+                return super.visitMethod(access, name, desc, signature, exceptions);
+            }
+        }, 6);
+        return cw.toByteArray();
+    }
+}