83 lines
3.7 KiB
Java
83 lines
3.7 KiB
Java
/*
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* This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
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* Copyright (C) 2023-2023 ViaVersion and contributors
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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package com.viaversion.viaversion.api.minecraft.signature.model.chain.v1_19_1;
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import com.viaversion.viaversion.api.minecraft.PlayerMessageSignature;
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import com.viaversion.viaversion.api.minecraft.signature.model.DecoratableMessage;
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import com.viaversion.viaversion.api.minecraft.signature.util.DataConsumer;
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import net.lenni0451.mcstructs.text.utils.JsonUtils;
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import java.io.ByteArrayOutputStream;
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import java.io.DataOutputStream;
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import java.io.IOException;
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import java.nio.charset.StandardCharsets;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import java.time.Instant;
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public class MessageBody {
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private static final byte HASH_SEPARATOR_BYTE = 70;
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private final DecoratableMessage content;
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private final Instant timestamp;
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private final long salt;
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private final PlayerMessageSignature[] lastSeenMessages;
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public MessageBody(final DecoratableMessage content, final Instant timestamp, final long salt, final PlayerMessageSignature[] lastSeenMessages) {
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this.content = content;
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this.timestamp = timestamp;
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this.salt = salt;
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this.lastSeenMessages = lastSeenMessages;
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}
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public void update(final DataConsumer dataConsumer) {
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try {
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final MessageDigest digest = MessageDigest.getInstance("SHA-256");
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final ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
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final DataOutputStream dataOutputStream = new DataOutputStream(outputStream);
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dataOutputStream.writeLong(this.salt);
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dataOutputStream.writeLong(this.timestamp.getEpochSecond());
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dataOutputStream.write(this.content.plain().getBytes(StandardCharsets.UTF_8));
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dataOutputStream.write(HASH_SEPARATOR_BYTE);
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if (this.content.isDecorated()) {
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dataOutputStream.write(JsonUtils.toSortedString(this.content.decorated(), null).getBytes(StandardCharsets.UTF_8));
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}
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for (PlayerMessageSignature lastSeenMessage : this.lastSeenMessages) {
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dataOutputStream.writeByte(HASH_SEPARATOR_BYTE);
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dataOutputStream.writeLong(lastSeenMessage.uuid().getMostSignificantBits());
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dataOutputStream.writeLong(lastSeenMessage.uuid().getLeastSignificantBits());
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dataOutputStream.write(lastSeenMessage.signatureBytes());
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}
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digest.update(outputStream.toByteArray());
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dataConsumer.accept(digest.digest());
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} catch (NoSuchAlgorithmException | IOException e) {
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throw new RuntimeException(e);
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}
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}
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}
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