hadoop ShellDecryptionKeyProvider 源码
haddop ShellDecryptionKeyProvider 代码
文件路径：/hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azure/ShellDecryptionKeyProvider.java
/**
* 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.azure;
import java.io.IOException;
import java.util.Arrays;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.util.Shell;
/**
* Shell decryption key provider which invokes an external script that will
* perform the key decryption.
*/
@InterfaceAudience.Private
public class ShellDecryptionKeyProvider extends SimpleKeyProvider {
static final String KEY_ACCOUNT_SHELLKEYPROVIDER_SCRIPT =
"fs.azure.shellkeyprovider.script";
@Override
public String getStorageAccountKey(String accountName, Configuration conf)
throws KeyProviderException {
String envelope = super.getStorageAccountKey(accountName, conf);
final String command = conf.get(KEY_ACCOUNT_SHELLKEYPROVIDER_SCRIPT);
if (command == null) {
throw new KeyProviderException(
"Script path is not specified via fs.azure.shellkeyprovider.script");
}
String[] cmd = command.split(" ");
String[] cmdWithEnvelope = Arrays.copyOf(cmd, cmd.length + 1);
cmdWithEnvelope[cmdWithEnvelope.length - 1] = envelope;
String decryptedKey = null;
try {
decryptedKey = Shell.execCommand(cmdWithEnvelope);
} catch (IOException ex) {
throw new KeyProviderException(ex);
}
// trim any whitespace
return decryptedKey.trim();
}
}
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