Github user vanzin commented on a diff in the pull request: https://github.com/apache/spark/pull/8880#discussion_r47139085 --- Diff: core/src/test/scala/org/apache/spark/crypto/ShuffleEncryptionSuite.scala --- @@ -0,0 +1,108 @@ +/* + * 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.crypto + +import java.security.PrivilegedExceptionAction + +import org.apache.hadoop.security.{Credentials, UserGroupInformation} +import org.apache.spark.{SparkConf, SparkFunSuite} +import org.apache.spark.crypto.CryptoConf._ +import org.apache.spark.crypto.CryptoStreamUtils.SPARK_CHIMERA_CONF_PREFIX + +private[spark] class ShuffleEncryptionSuite extends SparkFunSuite { + val ugi = UserGroupInformation.createUserForTesting("testuser", Array[String] { + "testgroup" + }) + + test("Test Chimera configuration conversion") { + val sparkKey1 = "spark.shuffle.chimera.a.b.c" + val sparkVal1 = "val1" + val chimeraKey1 = "chimera.a.b.c" + + val sparkKey2 = "spark.shuffle.chimeraA.b.c" + val sparkVal2 = "val2" + val chimeraKey2 = "chimera.A.b.c" + val conf = new SparkConf() + conf.set(sparkKey1, sparkVal1) + conf.set(sparkKey2, sparkVal2) + val props = CryptoStreamUtils.toChimeraConf(conf, SPARK_CHIMERA_CONF_PREFIX) + assert(props.getProperty(chimeraKey1) === sparkVal1) + assert(!props.contains(chimeraKey2)) + } + + test("Test shuffle encryption is disabled by default"){ + ugi.doAs(new PrivilegedExceptionAction[Unit]() { + override def run(): Unit = { + val credentials = UserGroupInformation.getCurrentUser.getCredentials() + val conf = new SparkConf() + initCredentials(conf, credentials) + assert(credentials.getSecretKey(SPARK_SHUFFLE_TOKEN) === null) + } + }) + } + + test("Test shuffle encryption key length should be 128 by default") { + ugi.doAs(new PrivilegedExceptionAction[Unit]() { + override def run(): Unit = { + val credentials = UserGroupInformation.getCurrentUser.getCredentials() + val conf = new SparkConf() + conf.set(SPARK_SHUFFLE_ENCRYPTION_ENABLED, String.valueOf(true)) --- End diff -- minor: you could just say `"true"`... or the more Scala-y `true.toString`.
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