/*
* 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.client.auth.deprecated;
import java.io.IOException;
import java.security.KeyPair;
import java.security.interfaces.RSAPublicKey;
import org.apache.sshd.client.session.ClientSessionImpl;
import org.apache.sshd.common.KeyPairProvider;
import org.apache.sshd.common.NamedFactory;
import org.apache.sshd.common.Signature;
import org.apache.sshd.common.SshConstants;
import org.apache.sshd.common.util.Buffer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* TODO Add javadoc
*
* @author <a href="mailto:dev@mina.apache.org">Apache MINA SSHD Project</a>
*/
public class UserAuthPublicKey extends AbstractUserAuth {
protected final Logger log = LoggerFactory.getLogger(getClass());
private final KeyPair key;
public UserAuthPublicKey(ClientSessionImpl session, String service, KeyPair key) {
super(session, service);
this.key = key;
}
public Result next(Buffer buffer) throws IOException {
if (buffer == null) {
try {
log.debug("Send SSH_MSG_USERAUTH_REQUEST for publickey");
buffer = session.createBuffer(SshConstants.SSH_MSG_USERAUTH_REQUEST);
int pos1 = buffer.wpos() - 1;
buffer.putString(session.getUsername());
buffer.putString(service);
buffer.putString("publickey");
buffer.putByte((byte) 1);
buffer.putString((key.getPublic() instanceof RSAPublicKey) ? KeyPairProvider.SSH_RSA : KeyPairProvider.SSH_DSS);
int pos2 = buffer.wpos();
buffer.putPublicKey(key.getPublic());
// TODO: support elliptic keys
Signature verif = NamedFactory.Utils.create(session.getFactoryManager().getSignatureFactories(), (key.getPublic() instanceof RSAPublicKey) ? KeyPairProvider.SSH_RSA : KeyPairProvider.SSH_DSS);
verif.init(key.getPublic(), key.getPrivate());
Buffer bs = new Buffer();
bs.putString(session.getKex().getH());
bs.putByte(SshConstants.SSH_MSG_USERAUTH_REQUEST);
bs.putString(session.getUsername());
bs.putString(service);
bs.putString("publickey");
bs.putByte((byte) 1);
bs.putString((key.getPublic() instanceof RSAPublicKey) ? KeyPairProvider.SSH_RSA : KeyPairProvider.SSH_DSS);
bs.putPublicKey(key.getPublic());
verif.update(bs.array(), bs.rpos(), bs.available());
bs = new Buffer();
bs.putString((key.getPublic() instanceof RSAPublicKey) ? KeyPairProvider.SSH_RSA : KeyPairProvider.SSH_DSS);
bs.putBytes(verif.sign());
buffer.putBytes(bs.array(), bs.rpos(), bs.available());
session.writePacket(buffer);
return Result.Continued;
} catch (IOException e) {
throw e;
} catch (Exception e) {
throw (IOException) new IOException("Error performing public key authentication").initCause(e);
}
} else {
byte cmd = buffer.getByte();
if (cmd == SshConstants.SSH_MSG_USERAUTH_SUCCESS) {
log.debug("Received SSH_MSG_USERAUTH_SUCCESS");
return Result.Success;
} if (cmd == SshConstants.SSH_MSG_USERAUTH_FAILURE) {
log.debug("Received SSH_MSG_USERAUTH_FAILURE");
return Result.Failure;
} else {
log.debug("Received unknown packet {}", cmd);
// TODO: check packets
return Result.Continued;
}
}
}
}