Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/15172#discussion_r85847599
--- Diff:
common/network-common/src/main/java/org/apache/spark/network/sasl/aes/AesCipher.java
---
@@ -0,0 +1,311 @@
+/*
+ * 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.sasl.aes;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.channels.ReadableByteChannel;
+import java.nio.channels.WritableByteChannel;
+import java.util.Properties;
+import javax.crypto.spec.SecretKeySpec;
+import javax.crypto.spec.IvParameterSpec;
+
+import com.google.common.base.Preconditions;
+import com.google.common.base.Throwables;
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.*;
+import io.netty.util.AbstractReferenceCounted;
+import org.apache.commons.crypto.cipher.CryptoCipherFactory;
+import org.apache.commons.crypto.random.CryptoRandom;
+import org.apache.commons.crypto.random.CryptoRandomFactory;
+import org.apache.commons.crypto.stream.CryptoInputStream;
+import org.apache.commons.crypto.stream.CryptoOutputStream;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import org.apache.spark.network.util.ByteArrayReadableChannel;
+import org.apache.spark.network.util.ByteArrayWritableChannel;
+import org.apache.spark.network.util.TransportConf;
+
+/**
+ * AES cipher for encryption and decryption.
+ */
+public class AesCipher {
+ private static final Logger logger =
LoggerFactory.getLogger(AesCipher.class);
+ public static final String ENCRYPTION_HANDLER_NAME = "AesEncryption";
+ public static final String DECRYPTION_HANDLER_NAME = "AesDecryption";
+
+ private final SecretKeySpec inKeySpec;
+ private final IvParameterSpec inIvSpec;
+ private final SecretKeySpec outKeySpec;
+ private final IvParameterSpec outIvSpec;
+ private Properties properties;
+
+ public static final int STREAM_BUFFER_SIZE = 1024 * 32;
+ public static final String TRANSFORM = "AES/CTR/NoPadding";
+
+ public AesCipher(
+ Properties properties,
+ byte[] inKey,
+ byte[] outKey,
+ byte[] inIv,
+ byte[] outIv) throws IOException {
+ this.properties = properties;
+ inKeySpec = new SecretKeySpec(inKey, "AES");
+ inIvSpec = new IvParameterSpec(inIv);
+ outKeySpec = new SecretKeySpec(outKey, "AES");
+ outIvSpec = new IvParameterSpec(outIv);
+ }
+
+ public AesCipher(AesConfigMessage configMessage) throws IOException {
+ this(new Properties(), configMessage.inKey, configMessage.outKey,
+ configMessage.inIv, configMessage.outIv);
+ }
+
+ /**
+ * Create AES crypto output stream
+ * @param ch The underlying channel to write out.
+ * @return Return output crypto stream for encryption.
+ * @throws IOException
+ */
+ public CryptoOutputStream CreateOutputStream(WritableByteChannel ch)
throws IOException {
--- End diff --
nit: method names should start with lower-case letters.
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