HADOOP-16445. Allow separate custom signing algorithms for S3 and DDB #1332
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| /* | ||
| * 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.s3a; | ||
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| import com.amazonaws.auth.Signer; | ||
| import com.amazonaws.auth.SignerFactory; | ||
| import java.io.Closeable; | ||
|
Contributor
There was a problem hiding this comment. usual and predictable comments about imports |
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| import java.io.IOException; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
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| import org.apache.hadoop.conf.Configuration; | ||
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| import static org.apache.hadoop.fs.s3a.Constants.CUSTOM_SIGNERS; | ||
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| /** | ||
| * Class to handle custom signers. | ||
| */ | ||
| public class SignerManager implements Closeable { | ||
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| private static final Logger LOG = LoggerFactory | ||
| .getLogger(SignerManager.class); | ||
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| public SignerManager() { | ||
| } | ||
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| /** | ||
| * Initialize custom signers and register them with the AWS SDK. | ||
| * | ||
| * @param conf Hadoop configuration | ||
| */ | ||
| public void initCustomSigners(Configuration conf) { | ||
| String[] customSigners = conf.getTrimmedStrings(CUSTOM_SIGNERS); | ||
| if (customSigners == null || customSigners.length == 0) { | ||
| // No custom signers specified, nothing to do. | ||
| LOG.debug("No custom signers specified"); | ||
| return; | ||
| } | ||
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| for (String customSigner : customSigners) { | ||
| String[] parts = customSigner.split(":"); | ||
| if (parts.length != 2) { | ||
| String message = | ||
| "Invalid format (Expected name:SignerClass) for CustomSigner: [" | ||
| + customSigner | ||
| + "]"; | ||
| LOG.error(message); | ||
| throw new IllegalArgumentException(message); | ||
| } | ||
| maybeRegisterSigner(parts[0], parts[1], conf); | ||
| } | ||
| } | ||
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| /* | ||
| * Make sure the signer class is registered once with the AWS SDK | ||
| */ | ||
| private static void maybeRegisterSigner(String signerName, | ||
| String signerClassName, Configuration conf) { | ||
| try { | ||
| SignerFactory.getSignerByTypeAndService(signerName, null); | ||
| } catch (IllegalArgumentException e) { | ||
| // Signer is not registered with the AWS SDK. | ||
| // Load the class and register the signer. | ||
| Class<? extends Signer> clazz = null; | ||
| try { | ||
| clazz = (Class<? extends Signer>) conf.getClassByName(signerClassName); | ||
| } catch (ClassNotFoundException cnfe) { | ||
| throw new RuntimeException(String | ||
| .format("Signer class [%s] not found for signer [%s]", | ||
| signerClassName, signerName), cnfe); | ||
| } | ||
| LOG.debug("Registering Custom Signer - [{}->{}]", signerName, | ||
| clazz.getName()); | ||
| synchronized (SignerManager.class) { | ||
| SignerFactory.registerSigner(signerName, clazz); | ||
| } | ||
| } | ||
| } | ||
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| @Override | ||
| public void close() throws IOException { | ||
| } | ||
| } | ||
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you are going to have to add these to the aws docs I'm afraid. This is probably time to start a new "signing" section