spark AuthMessage 源码
spark AuthMessage 代码
文件路径：/common/network-common/src/main/java/org/apache/spark/network/crypto/AuthMessage.java
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.spark.network.crypto;
import java.nio.ByteBuffer;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import org.apache.spark.network.protocol.Encodable;
import org.apache.spark.network.protocol.Encoders;
/**
* A message sent in the forward secure authentication protocol, containing an app ID, a salt for
* key derivation, and an encrypted payload.
*
* Please see crypto/README.md for more details of implementation.
*/
class AuthMessage implements Encodable {
/** Serialization tag used to catch incorrect payloads. */
private static final byte TAG_BYTE = (byte) 0xFB;
public final String appId;
public final byte[] salt;
public final byte[] ciphertext;
AuthMessage(String appId, byte[] salt, byte[] ciphertext) {
this.appId = appId;
this.salt = salt;
this.ciphertext = ciphertext;
}
@Override
public int encodedLength() {
return 1 +
Encoders.Strings.encodedLength(appId) +
Encoders.ByteArrays.encodedLength(salt) +
Encoders.ByteArrays.encodedLength(ciphertext);
}
@Override
public void encode(ByteBuf buf) {
buf.writeByte(TAG_BYTE);
Encoders.Strings.encode(buf, appId);
Encoders.ByteArrays.encode(buf, salt);
Encoders.ByteArrays.encode(buf, ciphertext);
}
public static AuthMessage decodeMessage(ByteBuffer buffer) {
ByteBuf buf = Unpooled.wrappedBuffer(buffer);
if (buf.readByte() != TAG_BYTE) {
throw new IllegalArgumentException("Expected ClientChallenge, received something else.");
}
return new AuthMessage(
Encoders.Strings.decode(buf), // AppID
Encoders.ByteArrays.decode(buf), // Salt
Encoders.ByteArrays.decode(buf)); // Ciphertext
}
}
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