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package org.apache.archiva.redback.keys;

/*
 * 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.
 */

import java.util.List;

/**
 * KeyManager
 *
 * @author Joakim Erdfelt
 *
 */
public interface KeyManager
{


    /**
     * String identifying the key manager implementation.
     *
     * @return the key manager implementation id.
     */
    String getId();

    /**
     * Attempt to find a specific key in the store.
     *
     * NOTE: Implementations of this interface should never return an expired key.
     *
     * @param key the key to find.
     * @return the actual key found.
     * @throws KeyNotFoundException when the requested, unexpired, key cannot be found.
     * @throws KeyManagerException  when there is a fundamental problem with the KeyManager implementation.
     */
    AuthenticationKey findKey( String key )
        throws KeyNotFoundException, KeyManagerException;

    /**
     * Create a key (and save it to the store) for the specified principal.
     *
     * @param principal         the principal to generate the key for.
     * @param purpose           the purpose of the key. (Example: "selfservice password reset", "new user validation",
     *                          "remember me")  This is a purely informational field .
     * @param expirationMinutes the amount in minutes until this key expires. (-1 means no expiration)
     * @return the key created
     * @throws KeyManagerException if there is a fundamental problem with the KeyManager implementation.
     */
    AuthenticationKey createKey( String principal, String purpose, int expirationMinutes )
        throws KeyManagerException;

    /**
     * Delete a key from the underlying store.
     *
     * @param key the key to delete.
     */
    void deleteKey( AuthenticationKey key )
        throws KeyManagerException;

    /**
     * Delete a key from the underlying store.
     *
     * @param key the key to delete.
     */
    void deleteKey( String key )
        throws KeyManagerException;

    List getAllKeys();

    AuthenticationKey addKey( AuthenticationKey key );

    void eraseDatabase();

    /**
     * Remove all keys that are expired.
     */
    void removeExpiredKeys()
        throws KeyManagerException;
}