94 lines
2.9 KiB
Java
94 lines
2.9 KiB
Java
package net.minecraft.network.chat;
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import com.google.common.base.Preconditions;
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import com.mojang.serialization.Codec;
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import java.nio.ByteBuffer;
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import java.util.Arrays;
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import java.util.Base64;
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import java.util.Optional;
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import net.minecraft.network.FriendlyByteBuf;
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import net.minecraft.util.ExtraCodecs;
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import net.minecraft.util.SignatureUpdater;
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import net.minecraft.util.SignatureValidator;
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import org.jetbrains.annotations.Nullable;
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public record MessageSignature(byte[] bytes) {
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public static final Codec<MessageSignature> CODEC = ExtraCodecs.BASE64_STRING.xmap(MessageSignature::new, MessageSignature::bytes);
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public static final int BYTES = 256;
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public MessageSignature(byte[] bytes) {
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Preconditions.checkState(bytes.length == 256, "Invalid message signature size");
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this.bytes = bytes;
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}
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public static MessageSignature read(FriendlyByteBuf buffer) {
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byte[] bs = new byte[256];
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buffer.readBytes(bs);
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return new MessageSignature(bs);
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}
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public static void write(FriendlyByteBuf buffer, MessageSignature signature) {
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buffer.writeBytes(signature.bytes);
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}
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public boolean verify(SignatureValidator validator, SignatureUpdater updater) {
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return validator.validate(updater, this.bytes);
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}
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public ByteBuffer asByteBuffer() {
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return ByteBuffer.wrap(this.bytes);
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}
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public boolean equals(Object object) {
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return this == object || object instanceof MessageSignature messageSignature && Arrays.equals(this.bytes, messageSignature.bytes);
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}
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public int hashCode() {
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return Arrays.hashCode(this.bytes);
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}
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public String toString() {
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return Base64.getEncoder().encodeToString(this.bytes);
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}
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public static String describe(@Nullable MessageSignature signature) {
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return signature == null ? "<no signature>" : signature.toString();
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}
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public MessageSignature.Packed pack(MessageSignatureCache signatureCache) {
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int i = signatureCache.pack(this);
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return i != -1 ? new MessageSignature.Packed(i) : new MessageSignature.Packed(this);
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}
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public int checksum() {
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return Arrays.hashCode(this.bytes);
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}
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public record Packed(int id, @Nullable MessageSignature fullSignature) {
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public static final int FULL_SIGNATURE = -1;
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public Packed(MessageSignature fullSignature) {
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this(-1, fullSignature);
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}
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public Packed(int id) {
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this(id, null);
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}
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public static MessageSignature.Packed read(FriendlyByteBuf buffer) {
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int i = buffer.readVarInt() - 1;
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return i == -1 ? new MessageSignature.Packed(MessageSignature.read(buffer)) : new MessageSignature.Packed(i);
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}
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public static void write(FriendlyByteBuf buffer, MessageSignature.Packed packed) {
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buffer.writeVarInt(packed.id() + 1);
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if (packed.fullSignature() != null) {
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MessageSignature.write(buffer, packed.fullSignature());
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}
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}
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public Optional<MessageSignature> unpack(MessageSignatureCache signatureCache) {
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return this.fullSignature != null ? Optional.of(this.fullSignature) : Optional.ofNullable(signatureCache.unpack(this.id));
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}
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}
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}
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