From 292e1b8d88d0e31f7f3a457bd0c2b145afd1de41 Mon Sep 17 00:00:00 2001
From: "novice.li" <novice.li@outlook.com>
Date: Mon, 1 Apr 2024 22:07:03 +0800
Subject: [PATCH] hook LicensingFacade

---
 .../LicensingFacadeTransformer.java           | 38 +++++++++++++++++++
 .../java/com/novitechie/PrivacyPlugin.java    |  2 +-
 .../java/com/novitechie/StackTraceRule.java   | 15 ++++++++
 3 files changed, 54 insertions(+), 1 deletion(-)
 create mode 100644 src/main/java/com/novitechie/LicensingFacadeTransformer.java

diff --git a/src/main/java/com/novitechie/LicensingFacadeTransformer.java b/src/main/java/com/novitechie/LicensingFacadeTransformer.java
new file mode 100644
index 0000000..4f786e2
--- /dev/null
+++ b/src/main/java/com/novitechie/LicensingFacadeTransformer.java
@@ -0,0 +1,38 @@
+package com.novitechie;
+
+import com.janetfilter.core.plugin.MyTransformer;
+import jdk.internal.org.objectweb.asm.ClassReader;
+import jdk.internal.org.objectweb.asm.ClassWriter;
+import jdk.internal.org.objectweb.asm.tree.*;
+
+import static jdk.internal.org.objectweb.asm.Opcodes.*;
+
+public class LicensingFacadeTransformer implements MyTransformer {
+    @Override
+    public String getHookClassName() {
+        return "com/intellij/ui/LicensingFacade";
+    }
+
+    @Override
+    public byte[] transform(String className, byte[] classBytes, int order) throws Exception {
+        ClassReader reader = new ClassReader(classBytes);
+        ClassNode node = new ClassNode(ASM5);
+        reader.accept(node, 0);
+        for (MethodNode m : node.methods) {
+            if ("getLicenseExpirationDate".equals(m.name)) {
+                InsnList list = new InsnList();
+                list.add(new MethodInsnNode(INVOKESTATIC, "com/novitechie/StackTraceRule", "hook", "()Ljava/util/Date;", false));
+                list.add(new InsnNode(DUP));
+                LabelNode labelNode = new LabelNode();
+                list.add(new JumpInsnNode(IFNULL,labelNode));
+                list.add(new InsnNode(ARETURN));
+                list.add(labelNode);
+                list.add(new InsnNode(POP));
+                m.instructions.insert(list);
+            }
+        }
+        ClassWriter writer = new ClassWriter(ClassWriter.COMPUTE_FRAMES | ClassWriter.COMPUTE_MAXS);
+        node.accept(writer);
+        return writer.toByteArray();
+    }
+}
diff --git a/src/main/java/com/novitechie/PrivacyPlugin.java b/src/main/java/com/novitechie/PrivacyPlugin.java
index 3e518b4..8e03e3b 100644
--- a/src/main/java/com/novitechie/PrivacyPlugin.java
+++ b/src/main/java/com/novitechie/PrivacyPlugin.java
@@ -19,6 +19,6 @@ public class PrivacyPlugin  implements PluginEntry {
 
     @Override
     public List<MyTransformer> getTransformers() {
-        return Arrays.asList(new VMOptionsTransformer(),new PluginClassLoaderTransformer());
+        return Arrays.asList(new VMOptionsTransformer(),new PluginClassLoaderTransformer(),new LicensingFacadeTransformer());
     }
 }
diff --git a/src/main/java/com/novitechie/StackTraceRule.java b/src/main/java/com/novitechie/StackTraceRule.java
index 5abf63f..e3d63d3 100644
--- a/src/main/java/com/novitechie/StackTraceRule.java
+++ b/src/main/java/com/novitechie/StackTraceRule.java
@@ -1,5 +1,8 @@
 package com.novitechie;
 
+import java.util.Calendar;
+import java.util.Date;
+
 public class StackTraceRule {
     public static boolean check() {
         RuntimeException e = new RuntimeException();
@@ -10,4 +13,16 @@ public class StackTraceRule {
         }
         return false;
     }
+
+    public static Date hook() {
+        RuntimeException e = new RuntimeException();
+        for (StackTraceElement stackTraceElement : e.getStackTrace()) {
+            if (stackTraceElement.getFileName() == null) {
+                Calendar calendar = Calendar.getInstance();
+                calendar.add(Calendar.DAY_OF_MONTH, 180);
+                return calendar.getTime();
+            }
+        }
+        return null;
+    }
 }