hadoop RandomSignerSecretProvider 源码
haddop RandomSignerSecretProvider 代码
文件路径：/hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/security/authentication/util/RandomSignerSecretProvider.java
/**
* Licensed 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. See accompanying LICENSE file.
*/
package org.apache.hadoop.security.authentication.util;
import org.apache.hadoop.classification.VisibleForTesting;
import java.security.SecureRandom;
import java.util.Random;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
/**
* A SignerSecretProvider that uses a random number as its secret. It rolls
* the secret at a regular interval.
*/
@InterfaceStability.Unstable
@InterfaceAudience.Private
public class RandomSignerSecretProvider extends RolloverSignerSecretProvider {
private final Random rand;
public RandomSignerSecretProvider() {
super();
rand = new SecureRandom();
}
/**
* This constructor lets you set the seed of the Random Number Generator and
* is meant for testing.
* @param seed the seed for the random number generator
*/
@VisibleForTesting
public RandomSignerSecretProvider(long seed) {
super();
rand = new Random(seed);
}
@Override
protected byte[] generateNewSecret() {
byte[] secret = new byte[32]; // 32 bytes = 256 bits
rand.nextBytes(secret);
return secret;
}
}
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