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Support Velocity MC 1.19+

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Haowei Wen 2022-08-06 00:19:07 +08:00
parent c8882173be
commit 9c0f278bb4
2 changed files with 67 additions and 0 deletions
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2
src/main/java/moe/yushi/authlibinjector/AuthlibInjector.java
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@ -65,6 +65,7 @@ import moe.yushi.authlibinjector.transform.support.PaperUsernameCheckTransformer
import moe.yushi.authlibinjector.transform.support.ProxyParameterWorkaround;
import moe.yushi.authlibinjector.transform.support.SkinWhitelistTransformUnit;
import moe.yushi.authlibinjector.transform.support.UsernameCharacterCheckTransformer;
import moe.yushi.authlibinjector.transform.support.VelocityIdentifiedKeyImplTransformUnit;
import moe.yushi.authlibinjector.transform.support.YggdrasilKeyTransformUnit;
import moe.yushi.authlibinjector.yggdrasil.CustomYggdrasilAPIProvider;
import moe.yushi.authlibinjector.yggdrasil.MojangYggdrasilAPIProvider;
@ -291,6 +292,7 @@ public final class AuthlibInjector {
transformer.units.add(new YggdrasilKeyTransformUnit());
config.getDecodedPublickey().ifPresent(YggdrasilKeyTransformUnit.PUBLIC_KEYS::add);
transformer.units.add(new VelocityIdentifiedKeyImplTransformUnit());
return transformer;
}

65
src/main/java/moe/yushi/authlibinjector/transform/support/VelocityProfileKeyTransformUnit.java Normal file
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@ -0,0 +1,65 @@
/*
* 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
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package moe.yushi.authlibinjector.transform.support;
import static org.objectweb.asm.Opcodes.ARETURN;
import static org.objectweb.asm.Opcodes.ASM9;
import static org.objectweb.asm.Opcodes.GETSTATIC;
import java.util.Optional;
import org.objectweb.asm.ClassVisitor;
import org.objectweb.asm.MethodVisitor;
import moe.yushi.authlibinjector.transform.TransformContext;
import moe.yushi.authlibinjector.transform.TransformUnit;
/**
* Hacks Velocity to bypass profile key signature validation.
* See https://github.com/PaperMC/Velocity/commit/1a3fba4250553702d9dcd05731d04347bfc24c9f .
*/
public class VelocityProfileKeyTransformUnit implements TransformUnit {
@Override
public Optional<ClassVisitor> transform(ClassLoader classLoader, String className, ClassVisitor writer, TransformContext ctx) {
if ("com.velocitypowered.proxy.crypto.IdentifiedKeyImpl".equals(className)) {
return Optional.of(new ClassVisitor(ASM9, writer) {
@Override
public MethodVisitor visitMethod(int access, String name, String descriptor, String signature, String[] exceptions) {
if ("validateData".equals(name) && "(Ljava/util/UUID;)Ljava/lang/Boolean;".equals(descriptor)) {
ctx.markModified();
MethodVisitor mv = super.visitMethod(access, name, descriptor, signature, exceptions);
mv.visitCode();
mv.visitFieldInsn(GETSTATIC, "java/lang/Boolean", "TRUE", "Ljava/lang/Boolean;");
mv.visitInsn(ARETURN);
mv.visitMaxs(-1, -1);
mv.visitEnd();
return null;
} else {
return super.visitMethod(access, name, descriptor, signature, exceptions);
}
}
});
} else {
return Optional.empty();
}
}
@Override
public String toString() {
return "Velocity Profile Key Transformer";
}
}