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PaperMC/paper-server/patches/features/0005-Use-Velocity-compression-and-cipher-natives.patch
Nassim Jahnke 3b0b3a0aef
and some more
2024-12-21 13:45:04 +01:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Andrew Steinborn <git@steinborn.me>
Date: Mon, 26 Jul 2021 02:15:17 -0400
Subject: [PATCH] Use Velocity compression and cipher natives
diff --git a/net/minecraft/network/CipherDecoder.java b/net/minecraft/network/CipherDecoder.java
index 429325ffb7db2b85ed271ddf3da64c6fdc593673..d764552aea825af7bbf0f47c9d88af527d9dbe62 100644
--- a/net/minecraft/network/CipherDecoder.java
+++ b/net/minecraft/network/CipherDecoder.java
@@ -7,14 +7,30 @@ import java.util.List;
import javax.crypto.Cipher;
public class CipherDecoder extends MessageToMessageDecoder<ByteBuf> {
- private final CipherBase cipher;
+ private final com.velocitypowered.natives.encryption.VelocityCipher cipher; // Paper - Use Velocity cipher
- public CipherDecoder(Cipher cipher) {
- this.cipher = new CipherBase(cipher);
+ public CipherDecoder(com.velocitypowered.natives.encryption.VelocityCipher cipher) { // Paper - Use Velocity cipher
+ this.cipher = cipher; // Paper - Use Velocity cipher
}
@Override
protected void decode(ChannelHandlerContext context, ByteBuf in, List<Object> out) throws Exception {
- out.add(this.cipher.decipher(context, in));
+ // Paper start - Use Velocity cipher
+ ByteBuf compatible = com.velocitypowered.natives.util.MoreByteBufUtils.ensureCompatible(context.alloc(), this.cipher, in);
+ try {
+ this.cipher.process(compatible);
+ out.add(compatible);
+ } catch (Exception e) {
+ compatible.release(); // compatible will never be used if we throw an exception
+ throw e;
+ }
+ // Paper end - Use Velocity cipher
}
+
+ // Paper start - Use Velocity cipher
+ @Override
+ public void handlerRemoved(ChannelHandlerContext ctx) {
+ this.cipher.close();
+ }
+ // Paper end - Use Velocity cipher
}
diff --git a/net/minecraft/network/CipherEncoder.java b/net/minecraft/network/CipherEncoder.java
index 992b9c7aed57ce29cdd2b4f66737d39db214f0cf..b927c85923147d2b346e892a3e4deee48b3d073e 100644
--- a/net/minecraft/network/CipherEncoder.java
+++ b/net/minecraft/network/CipherEncoder.java
@@ -5,15 +5,31 @@ import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToByteEncoder;
import javax.crypto.Cipher;
-public class CipherEncoder extends MessageToByteEncoder<ByteBuf> {
- private final CipherBase cipher;
+public class CipherEncoder extends io.netty.handler.codec.MessageToMessageEncoder<ByteBuf> { // Paper - Use Velocity cipher; change superclass
+ private final com.velocitypowered.natives.encryption.VelocityCipher cipher; // Paper - Use Velocity cipher
- public CipherEncoder(Cipher cipher) {
- this.cipher = new CipherBase(cipher);
+ public CipherEncoder(com.velocitypowered.natives.encryption.VelocityCipher cipher) { // Paper - Use Velocity cipher
+ this.cipher = cipher; // Paper - Use Velocity cipher
}
+ // Paper start - Use Velocity cipher
@Override
- protected void encode(ChannelHandlerContext context, ByteBuf message, ByteBuf out) throws Exception {
- this.cipher.encipher(message, out);
+ protected void encode(ChannelHandlerContext context, ByteBuf message, java.util.List<Object> list) throws Exception {
+ ByteBuf compatible = com.velocitypowered.natives.util.MoreByteBufUtils.ensureCompatible(context.alloc(), this.cipher, message);
+ try {
+ this.cipher.process(compatible);
+ list.add(compatible);
+ } catch (Exception e) {
+ compatible.release(); // compatible will never be used if we throw an exception
+ throw e;
+ }
+ // Paper end - Use Velocity cipher
}
+
+ // Paper start - Use Velocity cipher
+ @Override
+ public void handlerRemoved(ChannelHandlerContext ctx) {
+ this.cipher.close();
+ }
+ // Paper end - Use Velocity cipher
}
diff --git a/net/minecraft/network/CompressionDecoder.java b/net/minecraft/network/CompressionDecoder.java
index fcf0e557fbcbd5f306625096d859578fe8511734..2c7f935fcecb24a4394fdde523219a5b5984a673 100644
--- a/net/minecraft/network/CompressionDecoder.java
+++ b/net/minecraft/network/CompressionDecoder.java
@@ -12,14 +12,22 @@ import java.util.zip.Inflater;
public class CompressionDecoder extends ByteToMessageDecoder {
public static final int MAXIMUM_COMPRESSED_LENGTH = 2097152;
public static final int MAXIMUM_UNCOMPRESSED_LENGTH = 8388608;
+ private com.velocitypowered.natives.compression.VelocityCompressor compressor; // Paper - Use Velocity cipher
private Inflater inflater;
private int threshold;
private boolean validateDecompressed;
+ // Paper start - Use Velocity cipher
+ @io.papermc.paper.annotation.DoNotUse
public CompressionDecoder(int threshold, boolean validateDecompressed) {
+ this(null, threshold, validateDecompressed);
+ }
+ public CompressionDecoder(com.velocitypowered.natives.compression.VelocityCompressor compressor, int threshold, boolean validateDecompressed) {
this.threshold = threshold;
this.validateDecompressed = validateDecompressed;
- this.inflater = new Inflater();
+ this.inflater = compressor == null ? new Inflater() : null;
+ this.compressor = compressor;
+ // Paper end - Use Velocity cipher
}
@Override
@@ -39,14 +47,42 @@ public class CompressionDecoder extends ByteToMessageDecoder {
}
}
+ if (inflater != null) { // Paper - Use Velocity cipher; fallback to vanilla inflater
this.setupInflaterInput(in);
ByteBuf byteBuf = this.inflate(context, i);
this.inflater.reset();
out.add(byteBuf);
+ return; // Paper - Use Velocity cipher
+ } // Paper - use velocity compression
+
+ // Paper start - Use Velocity cipher
+ int claimedUncompressedSize = i; // OBFHELPER
+ ByteBuf compatibleIn = com.velocitypowered.natives.util.MoreByteBufUtils.ensureCompatible(context.alloc(), this.compressor, in);
+ ByteBuf uncompressed = com.velocitypowered.natives.util.MoreByteBufUtils.preferredBuffer(context.alloc(), this.compressor, claimedUncompressedSize);
+ try {
+ this.compressor.inflate(compatibleIn, uncompressed, claimedUncompressedSize);
+ out.add(uncompressed);
+ in.clear();
+ } catch (Exception e) {
+ uncompressed.release();
+ throw e;
+ } finally {
+ compatibleIn.release();
+ }
+ // Paper end - Use Velocity cipher
}
}
}
+ // Paper start - Use Velocity cipher
+ @Override
+ public void handlerRemoved0(ChannelHandlerContext ctx) {
+ if (this.compressor != null) {
+ this.compressor.close();
+ }
+ }
+ // Paper end - Use Velocity cipher
+
private void setupInflaterInput(ByteBuf buffer) {
ByteBuffer byteBuffer;
if (buffer.nioBufferCount() > 0) {
@@ -81,7 +117,13 @@ public class CompressionDecoder extends ByteToMessageDecoder {
}
}
- public void setThreshold(int threshold, boolean validateDecompressed) {
+ // Paper start - Use Velocity cipher
+ public void setThreshold(com.velocitypowered.natives.compression.VelocityCompressor compressor, int threshold, boolean validateDecompressed) {
+ if (this.compressor == null && compressor != null) { // Only re-configure once. Re-reconfiguring would require closing the native compressor.
+ this.compressor = compressor;
+ this.inflater = null;
+ }
+ // Paper end - Use Velocity cipher
this.threshold = threshold;
this.validateDecompressed = validateDecompressed;
}
diff --git a/net/minecraft/network/CompressionEncoder.java b/net/minecraft/network/CompressionEncoder.java
index bc674b08a41d5529fe06c6d3f077051cf4138f73..ea8a894158c44c2e7943dea43ecd8e1f0075b18f 100644
--- a/net/minecraft/network/CompressionEncoder.java
+++ b/net/minecraft/network/CompressionEncoder.java
@@ -6,17 +6,31 @@ import io.netty.handler.codec.MessageToByteEncoder;
import java.util.zip.Deflater;
public class CompressionEncoder extends MessageToByteEncoder<ByteBuf> {
- private final byte[] encodeBuf = new byte[8192];
+ @javax.annotation.Nullable private final byte[] encodeBuf; // Paper - Use Velocity cipher
+ @javax.annotation.Nullable // Paper - Use Velocity cipher
private final Deflater deflater;
+ @javax.annotation.Nullable private final com.velocitypowered.natives.compression.VelocityCompressor compressor; // Paper - Use Velocity cipher
private int threshold;
+ // Paper start - Use Velocity cipher
public CompressionEncoder(int threshold) {
+ this(null, threshold);
+ }
+ public CompressionEncoder(@javax.annotation.Nullable com.velocitypowered.natives.compression.VelocityCompressor compressor, int threshold) {
this.threshold = threshold;
- this.deflater = new Deflater();
+ if (compressor == null) {
+ this.encodeBuf = new byte[8192];
+ this.deflater = new Deflater();
+ } else {
+ this.encodeBuf = null;
+ this.deflater = null;
+ }
+ this.compressor = compressor;
+ // Paper end - Use Velocity cipher
}
@Override
- protected void encode(ChannelHandlerContext context, ByteBuf encodingByteBuf, ByteBuf byteBuf) {
+ protected void encode(ChannelHandlerContext context, ByteBuf encodingByteBuf, ByteBuf byteBuf) throws Exception { // Paper - Use Velocity cipher
int i = encodingByteBuf.readableBytes();
if (i > 8388608) {
throw new IllegalArgumentException("Packet too big (is " + i + ", should be less than 8388608)");
@@ -25,6 +39,7 @@ public class CompressionEncoder extends MessageToByteEncoder<ByteBuf> {
VarInt.write(byteBuf, 0);
byteBuf.writeBytes(encodingByteBuf);
} else {
+ if (this.deflater != null) { // Paper - Use Velocity cipher
byte[] bytes = new byte[i];
encodingByteBuf.readBytes(bytes);
VarInt.write(byteBuf, bytes.length);
@@ -37,6 +52,17 @@ public class CompressionEncoder extends MessageToByteEncoder<ByteBuf> {
}
this.deflater.reset();
+ // Paper start - Use Velocity cipher
+ return;
+ }
+
+ VarInt.write(byteBuf, i);
+ final ByteBuf compatibleIn = com.velocitypowered.natives.util.MoreByteBufUtils.ensureCompatible(context.alloc(), this.compressor, encodingByteBuf);
+ try {
+ this.compressor.deflate(compatibleIn, byteBuf);
+ } finally {
+ compatibleIn.release();
+ }
}
}
}
@@ -48,4 +74,31 @@ public class CompressionEncoder extends MessageToByteEncoder<ByteBuf> {
public void setThreshold(int threshold) {
this.threshold = threshold;
}
+
+ // Paper start - Use Velocity cipher
+ @Override
+ protected ByteBuf allocateBuffer(ChannelHandlerContext ctx, ByteBuf msg, boolean preferDirect) throws Exception {
+ if (this.compressor != null) {
+ // We allocate bytes to be compressed plus 1 byte. This covers two cases:
+ //
+ // - Compression
+ // According to https://github.com/ebiggers/libdeflate/blob/master/libdeflate.h#L103,
+ // if the data compresses well (and we do not have some pathological case) then the maximum
+ // size the compressed size will ever be is the input size minus one.
+ // - Uncompressed
+ // This is fairly obvious - we will then have one more than the uncompressed size.
+ final int initialBufferSize = msg.readableBytes() + 1;
+ return com.velocitypowered.natives.util.MoreByteBufUtils.preferredBuffer(ctx.alloc(), this.compressor, initialBufferSize);
+ }
+
+ return super.allocateBuffer(ctx, msg, preferDirect);
+ }
+
+ @Override
+ public void handlerRemoved(ChannelHandlerContext ctx) {
+ if (this.compressor != null) {
+ this.compressor.close();
+ }
+ }
+ // Paper end - Use Velocity cipher
}
diff --git a/net/minecraft/network/Connection.java b/net/minecraft/network/Connection.java
index ad8f8428b75e37097487cdfbd0db2421ee4cbe37..208efae06c7c44f220d4192219a86ec55c98a2fe 100644
--- a/net/minecraft/network/Connection.java
+++ b/net/minecraft/network/Connection.java
@@ -772,11 +772,22 @@ public class Connection extends SimpleChannelInboundHandler<Packet<?>> {
return connection;
}
- public void setEncryptionKey(Cipher decryptingCipher, Cipher encryptingCipher) {
- this.encrypted = true;
- this.channel.pipeline().addBefore("splitter", "decrypt", new CipherDecoder(decryptingCipher));
- this.channel.pipeline().addBefore("prepender", "encrypt", new CipherEncoder(encryptingCipher));
+ // Paper start - Use Velocity cipher
+ public void setEncryptionKey(javax.crypto.SecretKey key) throws net.minecraft.util.CryptException {
+ if (!this.encrypted) {
+ try {
+ com.velocitypowered.natives.encryption.VelocityCipher decryptionCipher = com.velocitypowered.natives.util.Natives.cipher.get().forDecryption(key);
+ com.velocitypowered.natives.encryption.VelocityCipher encryptionCipher = com.velocitypowered.natives.util.Natives.cipher.get().forEncryption(key);
+
+ this.encrypted = true;
+ this.channel.pipeline().addBefore("splitter", "decrypt", new CipherDecoder(decryptionCipher));
+ this.channel.pipeline().addBefore("prepender", "encrypt", new CipherEncoder(encryptionCipher));
+ } catch (java.security.GeneralSecurityException e) {
+ throw new net.minecraft.util.CryptException(e);
+ }
+ }
}
+ // Paper end - Use Velocity cipher
public boolean isEncrypted() {
return this.encrypted;
@@ -815,16 +826,17 @@ public class Connection extends SimpleChannelInboundHandler<Packet<?>> {
// Paper end - add proper async disconnect
public void setupCompression(int threshold, boolean validateDecompressed) {
if (threshold >= 0) {
+ com.velocitypowered.natives.compression.VelocityCompressor compressor = com.velocitypowered.natives.util.Natives.compress.get().create(io.papermc.paper.configuration.GlobalConfiguration.get().misc.compressionLevel.or(-1)); // Paper - Use Velocity cipher
if (this.channel.pipeline().get("decompress") instanceof CompressionDecoder compressionDecoder) {
- compressionDecoder.setThreshold(threshold, validateDecompressed);
+ compressionDecoder.setThreshold(compressor, threshold, validateDecompressed); // Paper - Use Velocity cipher
} else {
- this.channel.pipeline().addAfter("splitter", "decompress", new CompressionDecoder(threshold, validateDecompressed));
+ this.channel.pipeline().addAfter("splitter", "decompress", new CompressionDecoder(compressor, threshold, validateDecompressed)); // Paper - Use Velocity cipher
}
if (this.channel.pipeline().get("compress") instanceof CompressionEncoder compressionEncoder) {
compressionEncoder.setThreshold(threshold);
} else {
- this.channel.pipeline().addAfter("prepender", "compress", new CompressionEncoder(threshold));
+ this.channel.pipeline().addAfter("prepender", "compress", new CompressionEncoder(compressor, threshold)); // Paper - Use Velocity cipher
}
this.channel.pipeline().fireUserEventTriggered(io.papermc.paper.network.ConnectionEvent.COMPRESSION_THRESHOLD_SET); // Paper - Add Channel initialization listeners
} else {
diff --git a/net/minecraft/server/network/ServerConnectionListener.java b/net/minecraft/server/network/ServerConnectionListener.java
index 7de11ba404f0b60e7f7b7c16954811a343688219..bd07e6a5aa1883786d789ea71711a0c0c0a95c26 100644
--- a/net/minecraft/server/network/ServerConnectionListener.java
+++ b/net/minecraft/server/network/ServerConnectionListener.java
@@ -108,6 +108,10 @@ public class ServerConnectionListener {
LOGGER.warn("Using HAProxy, please ensure the server port is adequately firewalled.");
}
// Paper end - Warn people with console access that HAProxy is in use.
+ // Paper start - Use Velocity cipher
+ ServerConnectionListener.LOGGER.info("Paper: Using " + com.velocitypowered.natives.util.Natives.compress.getLoadedVariant() + " compression from Velocity.");
+ ServerConnectionListener.LOGGER.info("Paper: Using " + com.velocitypowered.natives.util.Natives.cipher.getLoadedVariant() + " cipher from Velocity.");
+ // Paper end - Use Velocity cipher
this.channels
.add(
diff --git a/net/minecraft/server/network/ServerLoginPacketListenerImpl.java b/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
index bb28453d230921d662ed69c8dd48021f428ef060..6689aeacf50d1498e8d23cce696fb4fecbd1cf39 100644
--- a/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
+++ b/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
@@ -276,11 +276,9 @@ public class ServerLoginPacketListenerImpl implements ServerLoginPacketListener,
}
SecretKey secretKey = packet.getSecretKey(_private);
- Cipher cipher = Crypt.getCipher(2, secretKey);
- Cipher cipher1 = Crypt.getCipher(1, secretKey);
string = new BigInteger(Crypt.digestData("", this.server.getKeyPair().getPublic(), secretKey)).toString(16);
this.state = ServerLoginPacketListenerImpl.State.AUTHENTICATING;
- this.connection.setEncryptionKey(cipher, cipher1);
+ this.connection.setEncryptionKey(secretKey); // Paper - Use Velocity cipher
} catch (CryptException var7) {
throw new IllegalStateException("Protocol error", var7);
}
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