hadoop SignerSecretProvider 源码
haddop SignerSecretProvider 代码
文件路径：/hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/security/authentication/util/SignerSecretProvider.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 java.util.Properties;
import javax.servlet.ServletContext;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
/**
* The SignerSecretProvider is an abstract way to provide a secret to be used
* by the Signer so that we can have different implementations that potentially
* do more complicated things in the backend.
* See the RolloverSignerSecretProvider class for an implementation that
* supports rolling over the secret at a regular interval.
*/
@InterfaceStability.Unstable
@InterfaceAudience.Private
public abstract class SignerSecretProvider {
/**
* Initialize the SignerSecretProvider
* @param config configuration properties
* @param servletContext servlet context
* @param tokenValidity The amount of time a token is valid for
* @throws Exception thrown if an error occurred
*/
public abstract void init(Properties config, ServletContext servletContext,
long tokenValidity) throws Exception;
/**
* Will be called on shutdown; subclasses should perform any cleanup here.
*/
public void destroy() {}
/**
* Returns the current secret to be used by the Signer for signing new
* cookies. This should never return null.
* <p>
* Callers should be careful not to modify the returned value.
* @return the current secret
*/
public abstract byte[] getCurrentSecret();
/**
* Returns all secrets that a cookie could have been signed with and are still
* valid; this should include the secret returned by getCurrentSecret().
* <p>
* Callers should be careful not to modify the returned value.
* @return the secrets
*/
public abstract byte[][] getAllSecrets();
}
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