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From pwendell <...@git.apache.org>
Subject [GitHub] spark pull request: Add Security to Spark - Akka, Http, Connection...
Date Thu, 27 Feb 2014 20:21:02 GMT
Github user pwendell commented on a diff in the pull request:

    https://github.com/apache/spark/pull/33#discussion_r10140602
  
    --- Diff: core/src/main/scala/org/apache/spark/SecurityManager.scala ---
    @@ -0,0 +1,259 @@
    +/*
    + * 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
    +
    +import java.net.{Authenticator, PasswordAuthentication}
    +import org.apache.hadoop.io.Text
    +import org.apache.hadoop.security.Credentials
    +import org.apache.hadoop.security.UserGroupInformation
    +import org.apache.spark.deploy.SparkHadoopUtil
    +
    +import scala.collection.mutable.ArrayBuffer
    +
    +/** 
    + * Spark class responsible for security. 
    + * 
    + * In general this class should be instantiated by the SparkEnv and most components
    + * should access it from that. There are some cases where the SparkEnv hasn't been 
    + * initialized yet and this class must be instantiated directly.
    + * 
    + * Spark currently supports authentication via a shared secret.
    + * Authentication can be configured to be on via the 'spark.authenticate' configuration
    + * parameter. This parameter controls whether the Spark communication protocols do 
    + * authentication using the shared secret. This authentication is a basic handshake to
    + * make sure both sides have the same shared secret and are allowed to communicate.
    + * If the shared secret is not identical they will not be allowed to communicate. 
    + * 
    + * The Spark UI can also be secured by using javax servlet filters. A user may want to

    + * secure the UI if it has data that other users should not be allowed to see. The javax

    + * servlet filter specified by the user can authenticate the user and then once the user

    + * is logged in, Spark can compare that user versus the view acls to make sure they are

    + * authorized to view the UI. The configs 'spark.ui.acls.enable' and 'spark.ui.view.acls'

    + * control the behavior of the acls. Note that the person who started the application
    + * always has view access to the UI.
    + *
    + * Spark does not currently support encryption after authentication.
    + * 
    + * At this point spark has multiple communication protocols that need to be secured and
    + * different underlying mechisms are used depending on the protocol:
    --- End diff --
    
    mechanisms


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