From ed9b5cdfc648e86fd463bfa8d86b94c41671e14c Mon Sep 17 00:00:00 2001
From: jeff
Date: Sun, 8 Feb 2015 21:29:25 -0500
Subject: switch all classes to new signature/type system

---
 src/cuchaz/enigma/bytecode/InnerClassWriter.java | 102 +++++++++++++++++++++++
 1 file changed, 102 insertions(+)
 create mode 100644 src/cuchaz/enigma/bytecode/InnerClassWriter.java

(limited to 'src/cuchaz/enigma/bytecode/InnerClassWriter.java')

diff --git a/src/cuchaz/enigma/bytecode/InnerClassWriter.java b/src/cuchaz/enigma/bytecode/InnerClassWriter.java
new file mode 100644
index 0000000..817500b
--- /dev/null
+++ b/src/cuchaz/enigma/bytecode/InnerClassWriter.java
@@ -0,0 +1,102 @@
+/*******************************************************************************
+ * Copyright (c) 2014 Jeff Martin.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the GNU Public License v3.0
+ * which accompanies this distribution, and is available at
+ * http://www.gnu.org/licenses/gpl.html
+ * 
+ * Contributors:
+ *     Jeff Martin - initial API and implementation
+ ******************************************************************************/
+package cuchaz.enigma.bytecode;
+
+import java.util.Collection;
+
+import javassist.CtClass;
+import javassist.bytecode.AccessFlag;
+import javassist.bytecode.ConstPool;
+import javassist.bytecode.Descriptor;
+import javassist.bytecode.EnclosingMethodAttribute;
+import javassist.bytecode.InnerClassesAttribute;
+import cuchaz.enigma.Constants;
+import cuchaz.enigma.analysis.JarIndex;
+import cuchaz.enigma.mapping.BehaviorEntry;
+import cuchaz.enigma.mapping.ClassEntry;
+
+public class InnerClassWriter {
+	
+	private JarIndex m_jarIndex;
+	
+	public InnerClassWriter(JarIndex jarIndex) {
+		m_jarIndex = jarIndex;
+	}
+	
+	public void write(CtClass c) {
+		
+		// is this an inner or outer class?
+		String obfInnerClassName = new ClassEntry(Descriptor.toJvmName(c.getName())).getSimpleName();
+		String obfOuterClassName = m_jarIndex.getOuterClass(obfInnerClassName);
+		if (obfOuterClassName == null) {
+			// this is an outer class
+			obfOuterClassName = Descriptor.toJvmName(c.getName());
+		} else {
+			// this is an inner class, rename it to outer$inner
+			ClassEntry obfClassEntry = new ClassEntry(obfOuterClassName + "$" + obfInnerClassName);
+			c.setName(obfClassEntry.getName());
+			
+			BehaviorEntry caller = m_jarIndex.getAnonymousClassCaller(obfInnerClassName);
+			if (caller != null) {
+				// write the enclosing method attribute
+				if (caller.getName().equals("<clinit>")) {
+					c.getClassFile().addAttribute(new EnclosingMethodAttribute(c.getClassFile().getConstPool(), caller.getClassName()));
+				} else {
+					c.getClassFile().addAttribute(new EnclosingMethodAttribute(c.getClassFile().getConstPool(), caller.getClassName(), caller.getName(), caller.getSignature().toString()));
+				}
+			}
+		}
+		
+		// write the inner classes if needed
+		Collection<String> obfInnerClassNames = m_jarIndex.getInnerClasses(obfOuterClassName);
+		if (obfInnerClassNames != null && !obfInnerClassNames.isEmpty()) {
+			writeInnerClasses(c, obfOuterClassName, obfInnerClassNames);
+		}
+	}
+	
+	private void writeInnerClasses(CtClass c, String obfOuterClassName, Collection<String> obfInnerClassNames) {
+		InnerClassesAttribute attr = new InnerClassesAttribute(c.getClassFile().getConstPool());
+		c.getClassFile().addAttribute(attr);
+		for (String obfInnerClassName : obfInnerClassNames) {
+			// get the new inner class name
+			ClassEntry obfClassEntry = new ClassEntry(obfOuterClassName + "$" + obfInnerClassName);
+			
+			// here's what the JVM spec says about the InnerClasses attribute
+			// append( inner, outer of inner if inner is member of outer 0 ow, name after $ if inner not anonymous 0 ow, flags );
+			
+			// update the attribute with this inner class
+			ConstPool constPool = c.getClassFile().getConstPool();
+			int innerClassIndex = constPool.addClassInfo(obfClassEntry.getName());
+			int outerClassIndex = 0;
+			int innerClassSimpleNameIndex = 0;
+			if (!m_jarIndex.isAnonymousClass(obfInnerClassName)) {
+				outerClassIndex = constPool.addClassInfo(obfClassEntry.getOuterClassName());
+				innerClassSimpleNameIndex = constPool.addUtf8Info(obfClassEntry.getInnerClassName());
+			}
+			
+			attr.append(innerClassIndex, outerClassIndex, innerClassSimpleNameIndex, c.getClassFile().getAccessFlags() & ~AccessFlag.SUPER);
+			
+			/* DEBUG 
+			System.out.println(String.format("\tOBF: %s -> ATTR: %s,%s,%s (replace %s with %s)",
+				obfClassEntry,
+				attr.outerClass(attr.tableLength() - 1),
+				attr.innerClass(attr.tableLength() - 1),
+				attr.innerName(attr.tableLength() - 1),
+				Constants.NonePackage + "/" + obfInnerClassName,
+				obfClassEntry.getName()
+			));
+			*/
+			
+			// make sure the outer class references only the new inner class names
+			c.replaceClassName(Constants.NonePackage + "/" + obfInnerClassName, obfClassEntry.getName());
+		}
+	}
+}
-- 
cgit v1.2.3