[优化] 优化 AES KEY 提到全局变量并支持配置

CHANGELOG.MD

@@ -5,6 +5,7 @@
 更新日志：
 
 - [BUG] 修复之前版本参数混淆功能实际没有生效
+- [优化] 优化 `AES KEY` 提到全局变量并支持配置
 - [优化] 配置文件支持关闭某些 `ASM` 选项提高兼容性
 
 感谢以下用户的贡献:

README.md

@@ -192,6 +192,8 @@ enableAES: true
 aesKey: OBF_DEFAULT_KEYS
 # AES 解密方法名
 aesDecName: iiLLiLi
+# AES KEY 字段名
+aesKeyField: iiiLLLi1i
 
 # 是否启用全局字符串提取混淆
 enableAdvanceString: true

src/main/java/me/n1ar4/clazz/obfuscator/asm/StringEncryptChanger.java

@@ -1,6 +1,7 @@
 package me.n1ar4.clazz.obfuscator.asm;
 
 import me.n1ar4.clazz.obfuscator.Const;
+import me.n1ar4.clazz.obfuscator.core.ObfEnv;
 import me.n1ar4.clazz.obfuscator.utils.AESUtil;
 import me.n1ar4.templates.AESTemplates;
 import org.objectweb.asm.*;
@@ -20,6 +21,14 @@ public class StringEncryptChanger extends ClassVisitor {
     public void visit(int version, int access, String name, String signature, String superName, String[] interfaces) {
         this.className = name;
         super.visit(version, access, name, signature, superName, interfaces);
+        FieldVisitor fieldVisitor = this.cv.visitField(
+                // private static final String [AES KEY] = "AES KEY";
+                Opcodes.ACC_PRIVATE | Opcodes.ACC_STATIC | Opcodes.ACC_FINAL,
+                ObfEnv.config.getAesKeyField(),
+                "Ljava/lang/String;",
+                null,
+                ObfEnv.config.getAesKey());
+        fieldVisitor.visitEnd();
     }
 
     @Override
@@ -161,7 +170,8 @@ public class StringEncryptChanger extends ClassVisitor {
             if (value instanceof String) {
                 try {
                     mv.visitLdcInsn(AESTemplates.encrypt((String) value, this.aesKey));
-                    mv.visitLdcInsn(this.aesKey);
+                    mv.visitFieldInsn(Opcodes.GETSTATIC, className,
+                            ObfEnv.config.getAesKeyField(), "Ljava/lang/String;");
                     mv.visitMethodInsn(
                             Opcodes.INVOKESTATIC,
                             className,

src/main/java/me/n1ar4/clazz/obfuscator/config/BaseConfig.java

@@ -28,6 +28,7 @@ public class BaseConfig {
 
     private String aesKey;
     private String aesDecName;
+    private String aesKeyField;
     private String[] obfuscateChars;
     private String[] methodBlackList;
 
@@ -44,6 +45,7 @@ public class BaseConfig {
         config.setEnableXOR(true);
         config.setEnableAES(true);
         config.setAesKey("OBF_DEFAULT_KEYS");
+        config.setAesKeyField("iiiLLLi1i");
         config.setAesDecName("iiLLiLi");
         config.setEnableDeleteCompileInfo(true);
         config.setEnableParamName(true);
@@ -86,6 +88,8 @@ public class BaseConfig {
                 ColorUtil.green(String.valueOf(enableAES)));
         System.out.println(ColorUtil.yellow("AES Decrypt KEY-> ") +
                 ColorUtil.green(String.valueOf(aesKey)));
+        System.out.println(ColorUtil.yellow("AES KEY Field-> ") +
+                ColorUtil.green(String.valueOf(aesKeyField)));
         System.out.println(ColorUtil.yellow("AES Decrypt Method-> ") +
                 ColorUtil.green(String.valueOf(aesDecName)));
         System.out.println(ColorUtil.yellow("Enable Advance String Obfuscate -> ") +
@@ -100,6 +104,14 @@ public class BaseConfig {
                 ColorUtil.green(String.valueOf(maxJunkOneClass)));
     }
 
+    public String getAesKeyField() {
+        return aesKeyField;
+    }
+
+    public void setAesKeyField(String aesKeyField) {
+        this.aesKeyField = aesKeyField;
+    }
+
     public boolean isAsmAutoCompute() {
         return asmAutoCompute;
     }

src/main/java/me/n1ar4/clazz/obfuscator/config/Manager.java

@@ -59,6 +59,7 @@ public class Manager {
         // field / method 都不应该包含这个字符串
         NameUtil.exclude(config.getAdvanceStringName());
         NameUtil.exclude(config.getAesDecName());
+        NameUtil.exclude(config.getAesKeyField());
         ObfEnv.ADVANCE_STRING_NAME = config.getAdvanceStringName();
 
         return true;

src/main/resources/config.yaml

@@ -39,6 +39,8 @@ enableAES: true
 aesKey: OBF_DEFAULT_KEYS
 # AES 解密方法名
 aesDecName: iiLLiLi
+# AES KEY 字段名
+aesKeyField: iiiLLLi1i
 
 # 是否启用全局字符串提取混淆
 enableAdvanceString: true