From 0b6966c6f855e421268bd2831dd226f9ea2485c4 Mon Sep 17 00:00:00 2001
From: Graham <gpe@openrs2.dev>
Date: Sat, 3 Aug 2019 11:52:00 +0100
Subject: [PATCH] Move signed classes in a single pass

---
 .../java/dev/openrs2/deob/Deobfuscator.java   | 19 ++++--------
 ...nedClassSet.java => SignedClassUtils.java} | 30 ++++++++-----------
 2 files changed, 18 insertions(+), 31 deletions(-)
 rename deob/src/main/java/dev/openrs2/deob/{SignedClassSet.java => SignedClassUtils.java} (83%)

diff --git a/deob/src/main/java/dev/openrs2/deob/Deobfuscator.java b/deob/src/main/java/dev/openrs2/deob/Deobfuscator.java
index b7b72634..f12124f4 100644
--- a/deob/src/main/java/dev/openrs2/deob/Deobfuscator.java
+++ b/deob/src/main/java/dev/openrs2/deob/Deobfuscator.java
@@ -60,11 +60,13 @@ public final class Deobfuscator {
 		var unsignedClient = new Library(client);
 
 		/* overwrite client's classes with signed classes from the loader */
-		logger.info("Moving signed classes from loader to runescape");
-		var signedClasses = SignedClassSet.create(loader, client);
+		logger.info("Moving signed classes from loader");
+		var signLink = new Library();
+		SignedClassUtils.move(loader, client, signLink);
 
-		logger.info("Moving signed classes from loader_gl to runescape_gl");
-		var glSignedClasses = SignedClassSet.create(glLoader, glClient);
+		logger.info("Moving signed classes from loader_gl");
+		var glSignLink = new Library();
+		SignedClassUtils.move(glLoader, glClient, glSignLink);
 
 		/* move unpack class out of the loader (so the unpacker and loader can both depend on it) */
 		logger.info("Moving unpack from loader to unpack");
@@ -75,15 +77,6 @@ public final class Deobfuscator {
 		var glUnpack = new Library();
 		glUnpack.add(glLoader.remove("unpack"));
 
-		/* move signed classes out of the client (so the client and loader can both depend on them) */
-		logger.info("Moving signed classes from runescape to signlink");
-		var signLink = new Library();
-		signedClasses.move(client, signLink);
-
-		logger.info("Moving signed classes from runescape_gl to signlink_gl");
-		var glSignLink = new Library();
-		glSignedClasses.move(glClient, glSignLink);
-
 		/* prefix remaining loader/unpacker classes (to avoid conflicts when we rename in the same classpath as the client) */
 		logger.info("Prefixing loader and unpacker class names");
 		ClassNamePrefixer.addPrefix(loader, "loader_");
diff --git a/deob/src/main/java/dev/openrs2/deob/SignedClassSet.java b/deob/src/main/java/dev/openrs2/deob/SignedClassUtils.java
similarity index 83%
rename from deob/src/main/java/dev/openrs2/deob/SignedClassSet.java
rename to deob/src/main/java/dev/openrs2/deob/SignedClassUtils.java
index e3312dc9..c714baf9 100644
--- a/deob/src/main/java/dev/openrs2/deob/SignedClassSet.java
+++ b/deob/src/main/java/dev/openrs2/deob/SignedClassUtils.java
@@ -16,12 +16,12 @@ import org.objectweb.asm.tree.MethodNode;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-public final class SignedClassSet {
-	private static final Logger logger = LoggerFactory.getLogger(SignedClassSet.class);
+public final class SignedClassUtils {
+	private static final Logger logger = LoggerFactory.getLogger(SignedClassUtils.class);
 
 	private static final InsnMatcher LOAD_SIGNED_CLASS_MATCHER = InsnMatcher.compile("LDC INVOKESTATIC ASTORE ALOAD GETFIELD ALOAD INVOKEVIRTUAL ALOAD INVOKEVIRTUAL POP");
 
-	public static SignedClassSet create(Library loader, Library client) {
+	public static void move(Library loader, Library client, Library signLink) {
 		/* find signed classes */
 		var signedClasses = findSignedClasses(loader);
 		logger.info("Identified signed classes {}", signedClasses);
@@ -36,18 +36,20 @@ public final class SignedClassSet {
 		}
 		var remapper = new SimpleRemapper(mapping);
 
-		/* move signed classes to the client */
-		var remappedSignedClasses = new HashSet<String>();
+		/* delete original signed classes (these have no dependencies) */
+		for (var name : signedClasses) {
+			client.remove(name);
+		}
+
+		/* move loader signed classes to signlink */
 		for (var name : Sets.union(signedClasses, dependencies)) {
 			var in = loader.remove(name);
 
 			var out = new ClassNode();
 			in.accept(new ClassRemapper(out, remapper));
 
-			remappedSignedClasses.add(out.name);
-			client.add(out);
+			signLink.add(out);
 		}
-		return new SignedClassSet(remappedSignedClasses);
 	}
 
 	private static Set<String> findSignedClasses(Library loader) {
@@ -100,15 +102,7 @@ public final class SignedClassSet {
 		return dependencies;
 	}
 
-	private final Set<String> signedClasses;
-
-	private SignedClassSet(Set<String> signedClasses) {
-		this.signedClasses = signedClasses;
-	}
-
-	public void move(Library client, Library signLink) {
-		for (var name : signedClasses) {
-			signLink.add(client.remove(name));
-		}
+	private SignedClassUtils() {
+		/* empty */
 	}
 }