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https://issues.apache.org/jira/browse/HADOOP-17912?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17654766#comment-17654766
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ASF GitHub Bot commented on HADOOP-17912:
-----------------------------------------
pranavsaxena-microsoft commented on code in PR #3440:
URL: https://github.com/apache/hadoop/pull/3440#discussion_r1062135054
##########
hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/security/EncodingHelper.java:
##########
@@ -0,0 +1,43 @@
+/**
+ * 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.hadoop.fs.azurebfs.security;
+
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.util.Base64;
+
+public class EncodingHelper {
+
+ public static byte[] getSHA256Hash(byte[] key) {
+ try {
+ final MessageDigest digester =
MessageDigest.getInstance("SHA-256");
+ return digester.digest(key);
+ } catch (NoSuchAlgorithmException ignored) {
+ /**
+ * This exception can be ignored. Reason being SHA-256 is a valid
algorithm, and it is constant for all
+ * method calls.
+ */
+ return null;
Review Comment:
made the change.
> ABFS: Support for Encryption Context
> ------------------------------------
>
> Key: HADOOP-17912
> URL: https://issues.apache.org/jira/browse/HADOOP-17912
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/azure
> Affects Versions: 3.3.1
> Reporter: Sumangala Patki
> Assignee: Pranav Saxena
> Priority: Major
> Labels: pull-request-available
> Time Spent: 1h
> Remaining Estimate: 0h
>
> Support for customer-provided encryption keys at the file level, superceding
> the global (account-level) key use in HADOOP-17536.
> ABFS driver will support an "EncryptionContext" plugin for retrieving
> encryption information, the implementation for which should be provided by
> the client. The keys/context retrieved will be sent via request headers to
> the server, which will store the encryption context. Subsequent REST calls to
> server that access data/user metadata of the file will require fetching the
> encryption context through a GetFileProperties call and retrieving the key
> from the custom provider, before sending the request.
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