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/*
* 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;
/**
* The client challenge message, used to initiate authentication.
*
* Please see crypto/README.md for more details of implementation.
*/
public class ClientChallenge implements Encodable {
/** Serialization tag used to catch incorrect payloads. */
private static final byte TAG_BYTE = (byte) 0xFA;
public final String appId;
public final String kdf;
public final int iterations;
public final String cipher;
public final int keyLength;
public final byte[] nonce;
public final byte[] challenge;
public ClientChallenge(
String appId,
String kdf,
int iterations,
String cipher,
int keyLength,
byte[] nonce,
byte[] challenge) {
this.appId = appId;
this.kdf = kdf;
this.iterations = iterations;
this.cipher = cipher;
this.keyLength = keyLength;
this.nonce = nonce;
this.challenge = challenge;
}
@Override
public int encodedLength() {
return 1 + 4 + 4 +
Encoders.Strings.encodedLength(appId) +
Encoders.Strings.encodedLength(kdf) +
Encoders.Strings.encodedLength(cipher) +
Encoders.ByteArrays.encodedLength(nonce) +
Encoders.ByteArrays.encodedLength(challenge);
}
@Override
public void encode(ByteBuf buf) {
buf.writeByte(TAG_BYTE);
Encoders.Strings.encode(buf, appId);
Encoders.Strings.encode(buf, kdf);
buf.writeInt(iterations);
Encoders.Strings.encode(buf, cipher);
buf.writeInt(keyLength);
Encoders.ByteArrays.encode(buf, nonce);
Encoders.ByteArrays.encode(buf, challenge);
}
public static ClientChallenge decodeMessage(ByteBuffer buffer) {
ByteBuf buf = Unpooled.wrappedBuffer(buffer);
if (buf.readByte() != TAG_BYTE) {
throw new IllegalArgumentException("Expected ClientChallenge, received something else.");
}
return new ClientChallenge(
Encoders.Strings.decode(buf),
Encoders.Strings.decode(buf),
buf.readInt(),
Encoders.Strings.decode(buf),
buf.readInt(),
Encoders.ByteArrays.decode(buf),
Encoders.ByteArrays.decode(buf));
}
}
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