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/*
* Copyright 2015 gitblit.com.
*
* 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.
*/
package com.gitblit.transport.ssh;
import java.util.Locale;
import org.apache.sshd.server.auth.gss.GSSAuthenticator;
import org.apache.sshd.server.session.ServerSession;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.gitblit.IStoredSettings;
import com.gitblit.Keys;
import com.gitblit.manager.IAuthenticationManager;
import com.gitblit.models.UserModel;
public class SshKrbAuthenticator extends GSSAuthenticator {
protected final Logger log = LoggerFactory.getLogger(getClass());
protected final IAuthenticationManager authManager;
protected final boolean stripDomain;
public SshKrbAuthenticator(IStoredSettings settings, IAuthenticationManager authManager) {
this.authManager = authManager;
String keytabString = settings.getString(Keys.git.sshKrb5Keytab, "");
if(! keytabString.isEmpty()) {
setKeytabFile(keytabString);
}
String servicePrincipalName = settings.getString(Keys.git.sshKrb5ServicePrincipalName, "");
if(! servicePrincipalName.isEmpty()) {
setServicePrincipalName(servicePrincipalName);
}
this.stripDomain = settings.getBoolean(Keys.git.sshKrb5StripDomain, false);
}
@Override
public boolean validateIdentity(ServerSession session, String identity) {
log.info("identify with kerberos {}", identity);
SshDaemonClient client = session.getAttribute(SshDaemonClient.KEY);
if (client.getUser() != null) {
log.info("{} has already authenticated!", identity);
return true;
}
String username = identity.toLowerCase(Locale.US);
if (stripDomain) {
int p = username.indexOf('@');
if (p > 0) {
username = username.substring(0, p);
}
}
UserModel user = authManager.authenticate(username);
if (user != null) {
client.setUser(user);
return true;
}
log.warn("could not authenticate {} for SSH", username);
return false;
}
}
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