Allatori deobfuscating adaptation for [ Diobfuscator ]

deobfuscator-transformers/src/main/java/uwu/narumi/deobfuscator/core/other/composed/ComposedAllatoriTransformer.java

@@ -1,6 +1,7 @@
 package uwu.narumi.deobfuscator.core.other.composed;
 
 import uwu.narumi.deobfuscator.api.transformer.ComposedTransformer;
+import uwu.narumi.deobfuscator.core.other.impl.allatori.AllatoriStringBuilderTransformer;
 import uwu.narumi.deobfuscator.core.other.impl.allatori.AllatoriStringTransformer;
 import uwu.narumi.deobfuscator.core.other.impl.universal.UniversalNumberTransformer;
 
@@ -9,7 +10,9 @@ public class ComposedAllatoriTransformer extends ComposedTransformer {
     public ComposedAllatoriTransformer(boolean strongString) {
         super(
             UniversalNumberTransformer::new,
-            () -> new AllatoriStringTransformer(strongString)
+            () -> new AllatoriStringTransformer(strongString),
+            // OK
+            AllatoriStringBuilderTransformer::new
         );
     }
 }

deobfuscator-transformers/src/main/java/uwu/narumi/deobfuscator/core/other/impl/allatori/AllatoriStringBuilderTransformer.java

@@ -0,0 +1,87 @@
+/*
+             MODIFIED DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+                     Version 2, December 2004
+
+  Copyright (C) 2025 d1cku5er
+
+  Everyone is permitted to copy and distribute verbatim or modified
+  copies of this license document, and changing it is allowed as long
+  as the name is changed.
+
+             MODIFIED DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+    TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+   0. You just DO WHAT THE FUCK YOU WANT TO.
+
+
+ */
+package uwu.narumi.deobfuscator.core.other.impl.allatori;
+
+import org.objectweb.asm.Opcodes;
+import org.objectweb.asm.tree.MethodInsnNode;
+import uwu.narumi.deobfuscator.api.transformer.Transformer;
+
+import java.util.Arrays;
+
+/**
+ * <p>Decompiler-friendly transformer, might change something looks like
+ * <pre><code>
+ *   new StringBuilder().insert(0, "d1ck").append("u5er").toString()
+ * </code></pre>
+ * to
+ * <pre><code>
+ *   "d1ck" + "u5er"
+ * </code></pre>
+ * <br>
+ *
+ * <strong>ALERT: Only works with some specified decompilers, might break
+ * the program</strong>
+ *
+ * @author d1cku5er
+ * @apiNote You might need to use InlineConstantValuesTransformer before using this
+ */
+public class AllatoriStringBuilderTransformer extends Transformer {
+  @Override protected void transform () throws Exception {
+    scopedClasses().forEach(cw -> {
+      cw.methods()
+          .forEach(mn -> {
+            /*
+            (POP) org.objectweb.asm.tree.InsnNode@a
+            (POP) org.objectweb.asm.tree.InsnNode@b
+            (ICONST_0) org.objectweb.asm.tree.InsnNode@c
+            (LDC) org.objectweb.asm.tree.LdcInsnNode@d
+            insert(int String)
+            (INVOKEVIRTUAL) org.objectweb.asm.tree.MethodInsnNode@e
+            */
+            Arrays.stream(mn.instructions.toArray())
+                .forEach(ain -> {
+                  if (ain != null) {
+                    if (
+                      // Invoke virtual check
+                        ain.getOpcode() == Opcodes.INVOKEVIRTUAL
+                        // Method call
+                        && ain.isMethodInsn() && ain.asMethodInsn().name.equals("insert")
+                        // int, java.lang.String
+                        && ain.asMethodInsn().desc.equals("(ILjava/lang/String;)Ljava/lang/StringBuilder;")
+                        // iconst zero
+                        && ain.previous().previous().getOpcode() == Opcodes.ICONST_0
+
+                    ) {
+                      mn.instructions.remove(ain.previous().previous());
+                      ((MethodInsnNode) ain).name = "append";
+                      ((MethodInsnNode) ain).desc = "(Ljava/lang/String;)Ljava/lang/StringBuilder;";
+                      markChange();
+                      /*
+                      (POP) org.objectweb.asm.tree.InsnNode@a
+                      (POP) org.objectweb.asm.tree.InsnNode@b
+                      (LDC) org.objectweb.asm.tree.LdcInsnNode@d
+                      append(String)
+                      (INVOKEVIRTUAL) org.objectweb.asm.tree.MethodInsnNode@e
+                      */
+                    }
+                  }
+                });
+          });
+    });
+  }
+}

testData/results/custom-classes/allatori/9.4/StringBuilderDeobfuscated.java

@@ -0,0 +1,10 @@
+import java.io.File;
+
+// Procyon
+public class Obfuscate {
+  public static /* synthetic */ void dummy() {
+    System.out.println(/*EL:295*/a.b() + " " + c.d());
+    System.out.println(/*EL:338*/"Usage:");
+    System.out.println(/*EL:580*/"Dummy string!");
+  }
+}

testData/results/custom-classes/allatori/9.4/StringDeobfuscated.java

@@ -0,0 +1,10 @@
+import java.io.File;
+
+// Procyon
+public class Obfuscate {
+  public static /* synthetic */ void dummy() {
+    System.out.println(/*EL:295*/new StringBuilder().insert(0x3 & 0x4, a.b()).append(" ").append(c.d()).toString());
+    System.out.println(/*EL:338*/"Usage:");
+    System.out.println(/*EL:580*/"Dummy string!");
+  }
+}