MirrorHub/authlib-injector
0
0
Fork 1
mirror of https://github.com/yushijinhun/authlib-injector.git synced 2024-11-14 22:01:16 +01:00
Code Issues Projects Releases Packages Wiki Activity

support authlib 3.5.41, fix #161

Browse source
This commit is contained in:
Haowei Wen 2022-06-05 19:10:56 +08:00
parent dee8e6989e
commit dbfcbf5b8c
1 changed files with 65 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

66
src/main/java/moe/yushi/authlibinjector/transform/support/YggdrasilKeyTransformUnit.java
View file

@ -1,5 +1,5 @@
/*
* Copyright (C) 2021 Haowei Wen <yushijinhun@gmail.com> and contributors
* Copyright (C) 2022 Haowei Wen <yushijinhun@gmail.com> and contributors
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
@ -16,11 +16,18 @@
*/
package moe.yushi.authlibinjector.transform.support;
import static moe.yushi.authlibinjector.util.Logging.Level.DEBUG;
import static org.objectweb.asm.Opcodes.ALOAD;
import static org.objectweb.asm.Opcodes.ASM9;
import static org.objectweb.asm.Opcodes.H_INVOKEVIRTUAL;
import static org.objectweb.asm.Opcodes.INVOKEVIRTUAL;
import static org.objectweb.asm.Opcodes.IRETURN;
import java.lang.invoke.MethodHandle;
import java.security.GeneralSecurityException;
import java.security.PublicKey;
import java.security.Signature;
import java.security.SignatureException;
import java.util.Base64;
import java.util.List;
import java.util.Optional;
import java.util.concurrent.CopyOnWriteArrayList;
@ -31,6 +38,8 @@ import moe.yushi.authlibinjector.transform.CallbackMethod;
import moe.yushi.authlibinjector.transform.CallbackSupport;
import moe.yushi.authlibinjector.transform.TransformContext;
import moe.yushi.authlibinjector.transform.TransformUnit;
import moe.yushi.authlibinjector.util.Logging;
import moe.yushi.authlibinjector.util.Logging.Level;
public class YggdrasilKeyTransformUnit implements TransformUnit {
@ -49,6 +58,35 @@ public class YggdrasilKeyTransformUnit implements TransformUnit {
return false;
}
@CallbackMethod
public static boolean verifyPropertySignatureNew(Signature mojangSignatureObj, String propertyValue, String base64Signature) {
byte[] sig = Base64.getDecoder().decode(base64Signature);
byte[] data = propertyValue.getBytes();
try {
mojangSignatureObj.update(data);
if (mojangSignatureObj.verify(sig))
return true;
} catch (SignatureException e) {
Logging.log(DEBUG, "Failed to verify signature with Mojang's key", e);
}
for (PublicKey customKey : PUBLIC_KEYS) {
try {
Signature signature = Signature.getInstance("SHA1withRSA");
signature.initVerify(customKey);
signature.update(data);
if (signature.verify(sig))
return true;
} catch (GeneralSecurityException e) {
Logging.log(DEBUG, "Failed to verify signature with custom key " + customKey, e);
}
}
Logging.log(Level.WARNING, "Failed to verify property signature");
return false;
}
@Override
public Optional<ClassVisitor> transform(ClassLoader classLoader, String className, ClassVisitor writer, TransformContext ctx) {
if ("com.mojang.authlib.yggdrasil.YggdrasilMinecraftSessionService".equals(className)) {
@ -73,6 +111,32 @@ public class YggdrasilKeyTransformUnit implements TransformUnit {
}
});
} else if ("com.mojang.authlib.yggdrasil.YggdrasilServicesKeyInfo".equals(className)) {
return Optional.of(new ClassVisitor(ASM9, writer) {
@Override
public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions) {
if ("validateProperty".equals(name) && "(Lcom/mojang/authlib/properties/Property;)Z".equals(desc)) {
ctx.markModified();
MethodVisitor mv = super.visitMethod(access, name, desc, signature, exceptions);
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKEVIRTUAL, "com/mojang/authlib/yggdrasil/YggdrasilServicesKeyInfo", "signature", "()Ljava/security/Signature;", false);
mv.visitVarInsn(ALOAD, 1);
mv.visitMethodInsn(INVOKEVIRTUAL, "com/mojang/authlib/properties/Property", "getValue", "()Ljava/lang/String;", false);
mv.visitVarInsn(ALOAD, 1);
mv.visitMethodInsn(INVOKEVIRTUAL, "com/mojang/authlib/properties/Property", "getSignature", "()Ljava/lang/String;", false);
CallbackSupport.invoke(ctx, mv, YggdrasilKeyTransformUnit.class, "verifyPropertySignatureNew");
mv.visitInsn(IRETURN);
mv.visitMaxs(-1, -1);
mv.visitEnd();
return null;
} else {
return super.visitMethod(access, name, desc, signature, exceptions);
}
}
});
} else {
return Optional.empty();
}