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Make Java17ToJava8 converter whitelisted

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This commit is contained in:
RaphiMC 2023-04-23 18:52:18 +02:00
parent 30307d8231
commit 46d137a158
2 changed files with 20 additions and 4 deletions
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2
src/main/java/net/raphimc/viaproxy/ViaProxy.java
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@ -73,7 +73,7 @@ public class ViaProxy {
final IClassProvider classProvider = new GuavaClassPathProvider();
final TransformerManager transformerManager = new TransformerManager(classProvider);
transformerManager.addTransformerPreprocessor(new MixinsTranslator());
transformerManager.addBytecodeTransformer(new Java17ToJava8(classProvider));
transformerManager.addBytecodeTransformer(new Java17ToJava8(classProvider).addWhitelistedPackage("com.mojang"));
transformerManager.addTransformer("net.raphimc.viaproxy.injection.transformer.**");
transformerManager.addTransformer("net.raphimc.viaproxy.injection.mixins.**");
if (instrumentation != null) {

22
src/main/java/net/raphimc/viaproxy/injection/Java17ToJava8.java
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@ -24,6 +24,7 @@ import org.objectweb.asm.Opcodes;
import org.objectweb.asm.Type;
import org.objectweb.asm.tree.*;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
@ -33,17 +34,32 @@ public class Java17ToJava8 implements IBytecodeTransformer {
private static final char BSM_ARG_CONSTANT = '\u0002';
private final IClassProvider classProvider;
private final int nativeClassVersion;
private final List<String> whitelistedPackages = new ArrayList<>();
public Java17ToJava8(final IClassProvider classProvider) {
this.classProvider = classProvider;
final String classVersion = System.getProperty("java.class.version");
final String[] versions = classVersion.split("\\.");
final int majorVersion = Integer.parseInt(versions[0]);
final int minorVersion = Integer.parseInt(versions[1]);
this.nativeClassVersion = minorVersion << 16 | majorVersion;
}
public Java17ToJava8 addWhitelistedPackage(final String packageName) {
this.whitelistedPackages.add(packageName);
return this;
}
@Override
public byte[] transform(String className, byte[] bytecode) {
if (!className.startsWith("com.mojang") && !className.startsWith("org.geysermc")) return null;
for (String whitelistedPackage : this.whitelistedPackages) {
if (!className.startsWith(whitelistedPackage)) return null;
}
ClassNode classNode = ASMUtils.fromBytes(bytecode);
if (classNode.version <= Opcodes.V1_8) return null;
final ClassNode classNode = ASMUtils.fromBytes(bytecode);
if (classNode.version <= this.nativeClassVersion) return null;
classNode.version = Opcodes.V1_8;
this.makePublic(classNode);