/*
* 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.keyprovider;
import java.security.KeyPair;
import java.security.interfaces.DSAKey;
import java.security.interfaces.RSAKey;
import java.util.ArrayList;
import java.util.List;
import org.apache.sshd.common.KeyPairProvider;
/**
* TODO Add javadoc
*
* @author <a href="mailto:dev@mina.apache.org">Apache MINA SSHD Project</a>
*/
public abstract class AbstractKeyPairProvider implements KeyPairProvider {
public KeyPair loadKey(String type) {
assert type != null;
KeyPair[] keys = loadKeys();
for (KeyPair key : keys) {
if (type.equals(getKeyType(key))) {
return key;
}
}
return null;
}
public String getKeyTypes() {
List<String> types = new ArrayList<String>();
KeyPair[] keys = loadKeys();
for (KeyPair key : keys) {
String type = getKeyType(key);
if (type != null && !types.contains(type)) {
types.add(type);
}
}
StringBuilder sb = new StringBuilder();
for (String type : types) {
if (sb.length() > 0) {
sb.append(",");
}
sb.append(type);
}
return sb.toString();
}
protected String getKeyType(KeyPair kp) {
Object key = kp.getPrivate() != null ? kp.getPrivate() : kp.getPublic();
if (key instanceof DSAKey) {
return SSH_DSS;
} else if (key instanceof RSAKey) {
return SSH_RSA;
}
return null;
}
protected abstract KeyPair[] loadKeys();
}