/*
* 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.sshd.common;
import java.security.KeyPair;
/**
* Provider for key pairs. This provider is used on the server side to provide
* the host key, or on the client side to provide the user key.
*
* @author <a href="mailto:dev@mina.apache.org">Apache MINA SSHD Project</a>
*/
public interface KeyPairProvider {
/**
* SSH identifier for RSA keys
*/
String SSH_RSA = "ssh-rsa";
/**
* SSH identifier for DSA keys
*/
String SSH_DSS = "ssh-dss";
/**
* Load a key of the specified type which can be "ssh-rsa" or "ssh-dss".
* If there is no key of this type, return <code>null</code>
*
* @param type the type of key to load
* @return a valid key pair or <code>null</code>
*/
KeyPair loadKey(String type);
/**
* Return a comma separated list of the key types available
*
* @return the list of key availables
*/
String getKeyTypes();
}