{"action":"created","comment":{"url":"https://api.github.com/repos/apache/spark/pulls/comments/41582937","id":41582937,"diff_hunk":"@@ -0,0 +1,439 @@\n+/*\n+ * Licensed to the Apache Software Foundation (ASF) under one or more\n+ * contributor license agreements.  See the NOTICE file distributed with\n+ * this work for additional information regarding copyright ownership.\n+ * The ASF licenses this file to You under the Apache License, Version 2.0\n+ * (the \"License\"); you may not use this file except in compliance with\n+ * the License.  You may obtain a copy of the License at\n+ *\n+ *    http://www.apache.org/licenses/LICENSE-2.0\n+ *\n+ * Unless required by applicable law or agreed to in writing, software\n+ * distributed under the License is distributed on an \"AS IS\" BASIS,\n+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n+ * See the License for the specific language governing permissions and\n+ * limitations under the License.\n+ */\n+package org.apache.spark.crypto\n+\n+import java.io.{IOException, InputStream, FilterInputStream}\n+import java.nio.ByteBuffer\n+import java.nio.channels.ReadableByteChannel\n+import java.security.GeneralSecurityException\n+import java.util.Queue\n+import java.util.concurrent.ConcurrentLinkedQueue\n+\n+import com.google.common.base.Preconditions\n+\n+/**\n+ * CryptoInputStream decrypts data. It is not thread-safe. AES CTR mode is\n+ * required in order to ensure that the plain text and cipher text have a 1:1\n+ * mapping. The decryption is buffer based. The key points of the decryption\n+ * are (1) calculating the counter and (2) padding through stream position:\n+ * <p/>\n+ * counter = base + pos/(algorithm blocksize);\n+ * padding = pos%(algorithm blocksize);\n+ * <p/>\n+ * The underlying stream offset is maintained as state.\n+ */\n+class CryptoInputStream(\n+    in: InputStream,\n+    codecVal: CryptoCodec,","path":"core/src/main/scala/org/apache/spark/crypto/CryptoInputStream.scala","position":41,"original_position":41,"commit_id":"acb5c89efb0e987acf476020db850ba9add14a75","original_commit_id":"acb5c89efb0e987acf476020db850ba9add14a75","user":{"login":"vanzin","id":1694083,"avatar_url":"https://avatars.githubusercontent.com/u/1694083?v=3","gravatar_id":"","url":"https://api.github.com/users/vanzin","html_url":"https://github.com/vanzin","followers_url":"https://api.github.com/users/vanzin/followers","following_url":"https://api.github.com/users/vanzin/following{/other_user}","gists_url":"https://api.github.com/users/vanzin/gists{/gist_id}","starred_url":"https://api.github.com/users/vanzin/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/vanzin/subscriptions","organizations_url":"https://api.github.com/users/vanzin/orgs","repos_url":"https://api.github.com/users/vanzin/repos","events_url":"https://api.github.com/users/vanzin/events{/privacy}","received_events_url":"https://api.github.com/users/vanzin/received_events","type":"User","site_admin":false},"body":"I'd name this just `codec`.","created_at":"2015-10-08T23:28:21Z","updated_at":"2015-10-08T23:28:21Z","html_url":"https://github.com/apache/spark/pull/8880#discussion_r41582937","pull_request_url":"https://api.github.com/repos/apache/spark/pulls/8880","_links":{"self":{"href":"https://api.github.com/repos/apache/spark/pulls/comments/41582937"},"html":{"href":"https://github.com/apache/spark/pull/8880#discussion_r41582937"},"pull_request":{"href":"https://api.github.com/repos/apache/spark/pulls/8880"}}},"pull_request":{"url":"https://api.github.com/repos/apache/spark/pulls/8880","id":45748848,"html_url":"https://github.com/apache/spark/pull/8880","diff_url":"https://github.com/apache/spark/pull/8880.diff","patch_url":"https://github.com/apache/spark/pull/8880.patch","issue_url":"https://api.github.com/repos/apache/spark/issues/8880","number":8880,"state":"open","locked":false,"title":"SPARK-10771: Implement the shuffle encryption with AES-CTR crypto using JCE key provider.","user":{"login":"winningsix","id":2278268,"avatar_url":"https://avatars.githubusercontent.com/u/2278268?v=3","gravatar_id":"","url":"https://api.github.com/users/winningsix","html_url":"https://github.com/winningsix","followers_url":"https://api.github.com/users/winningsix/followers","following_url":"https://api.github.com/users/winningsix/following{/other_user}","gists_url":"https://api.github.com/users/winningsix/gists{/gist_id}","starred_url":"https://api.github.com/users/winningsix/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/winningsix/subscriptions","organizations_url":"https://api.github.com/users/winningsix/orgs","repos_url":"https://api.github.com/users/winningsix/repos","events_url":"https://api.github.com/users/winningsix/events{/privacy}","received_events_url":"https://api.github.com/users/winningsix/received_events","type":"User","site_admin":false},"body":"This patch is using JCE key provider and it's a subtask of SPARK-5682. We will add openssl to accelerate the 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