Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/8880#discussion_r42053251
--- Diff: core/src/main/scala/org/apache/spark/crypto/CryptoCodec.scala ---
@@ -0,0 +1,93 @@
+/*
+ * 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 org.apache.spark.{Logging, SparkConf}
+import
org.apache.spark.crypto.CommonConfigurationKeys.SPARK_SECURITY_CRYPTO_CIPHER_SUITE_DEFAULT
+import
org.apache.spark.crypto.CommonConfigurationKeys.SPARK_SECURITY_CRYPTO_CIPHER_SUITE_KEY
+import
org.apache.spark.crypto.CommonConfigurationKeys.SPARK_SECURITY_CRYPTO_CODEC_CLASSES_AES_CTR_NOPADDING_KEY
+
+/**
+ * Crypto codec class, encapsulates encryptor/decryptor pair.
+ */
+private[spark] abstract class CryptoCodec {
+ /**
+ *
+ * @return the CipherSuite for this codec.
+ */
+ def getCipherSuite(): CipherSuite
+
+ /**
+ * This interface is only for Counter (CTR) mode. Generally the Encryptor
+ * or Decryptor calculates the IV and maintain encryption context
internally.
+ * For example a [[javax.crypto.Cipher]] will maintain its encryption
+ * context internally when we do encryption/decryption using the
+ * Cipher#update interface.
+ *
+ * The IV can be calculated by combining the initial IV and the counter
with
+ * a lossless operation (concatenation, addition, or XOR).
+ * @see
http://en.wikipedia.org/wiki/Block_cipher_mode_of_operation#Counter_.28CTR.29
+ * @param initIV
--- End diff --
Can you explain what each argument is? for example, from the
implementation, `iv` seems to be output only; why can't it be a return value?
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastruct...@apache.org or file a JIRA ticket
with INFRA.
---
---------------------------------------------------------------------
To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org
For additional commands, e-mail: reviews-h...@spark.apache.org
