Add HostCheckTransformer

bzip2
Graham 5 years ago
parent 405c33c1a1
commit a1f7cf5ce4
  1. 90
      bundler/src/main/java/dev/openrs2/bundler/transform/HostCheckTransformer.java
  2. 2
      deob/src/main/java/dev/openrs2/deob/Deobfuscator.java

@ -0,0 +1,90 @@
package dev.openrs2.bundler.transform;
import dev.openrs2.asm.InsnMatcher;
import dev.openrs2.asm.classpath.ClassPath;
import dev.openrs2.asm.transform.Transformer;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.Type;
import org.objectweb.asm.tree.ClassNode;
import org.objectweb.asm.tree.InsnNode;
import org.objectweb.asm.tree.MethodInsnNode;
import org.objectweb.asm.tree.MethodNode;
import org.objectweb.asm.tree.analysis.AnalyzerException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public final class HostCheckTransformer extends Transformer {
private static final Logger logger = LoggerFactory.getLogger(HostCheckTransformer.class);
private static final InsnMatcher GET_HOST_MATCHER = InsnMatcher.compile("INVOKEVIRTUAL INVOKEVIRTUAL INVOKEVIRTUAL");
private int hostChecks;
@Override
protected void preTransform(ClassPath classPath) throws AnalyzerException {
hostChecks = 0;
}
@Override
protected boolean transformCode(ClassNode clazz, MethodNode method) throws AnalyzerException {
if (Type.getReturnType(method.desc).getSort() != Type.BOOLEAN) {
return false;
}
GET_HOST_MATCHER.match(method).forEach(match -> {
var insn1 = (MethodInsnNode) match.get(0);
if (!insn1.owner.equals(clazz.name)) {
return;
}
if (!insn1.name.equals("getDocumentBase")) {
return;
}
if (!insn1.desc.equals("()Ljava/net/URL;")) {
return;
}
var insn2 = (MethodInsnNode) match.get(1);
if (!insn2.owner.equals("java/net/URL")) {
return;
}
if (!insn2.name.equals("getHost")) {
return;
}
if (!insn2.desc.equals("()Ljava/lang/String;")) {
return;
}
var insn3 = (MethodInsnNode) match.get(2);
if (!insn3.owner.equals("java/lang/String")) {
return;
}
if (!insn3.name.equals("toLowerCase")) {
return;
}
if (!insn3.desc.equals("()Ljava/lang/String;")) {
return;
}
method.instructions.clear();
method.tryCatchBlocks.clear();
method.instructions.add(new InsnNode(Opcodes.ICONST_1));
method.instructions.add(new InsnNode(Opcodes.IRETURN));
hostChecks++;
});
return false;
}
@Override
protected void postTransform(ClassPath classPath) throws AnalyzerException {
logger.info("Removed {} host checks", hostChecks);
}
}

@ -10,6 +10,7 @@ import com.google.common.collect.ImmutableList;
import dev.openrs2.asm.classpath.ClassPath; import dev.openrs2.asm.classpath.ClassPath;
import dev.openrs2.asm.classpath.Library; import dev.openrs2.asm.classpath.Library;
import dev.openrs2.asm.transform.Transformer; import dev.openrs2.asm.transform.Transformer;
import dev.openrs2.bundler.transform.HostCheckTransformer;
import dev.openrs2.bundler.transform.RightClickTransformer; import dev.openrs2.bundler.transform.RightClickTransformer;
import dev.openrs2.deob.remap.ClassNamePrefixer; import dev.openrs2.deob.remap.ClassNamePrefixer;
import dev.openrs2.deob.remap.TypedRemapper; import dev.openrs2.deob.remap.TypedRemapper;
@ -31,6 +32,7 @@ public final class Deobfuscator {
private static final Logger logger = LoggerFactory.getLogger(Deobfuscator.class); private static final Logger logger = LoggerFactory.getLogger(Deobfuscator.class);
private static final List<Transformer> TRANSFORMERS = List.of( private static final List<Transformer> TRANSFORMERS = List.of(
new HostCheckTransformer(),
new RightClickTransformer(), new RightClickTransformer(),
new OpaquePredicateTransformer(), new OpaquePredicateTransformer(),
new ExceptionTracingTransformer(), new ExceptionTracingTransformer(),

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