/*
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* Copyright 2015 gitblit.com.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.gitblit.transport.ssh;
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import java.util.Locale;
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import org.apache.sshd.server.auth.gss.GSSAuthenticator;
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import org.apache.sshd.server.session.ServerSession;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import com.gitblit.IStoredSettings;
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import com.gitblit.Keys;
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import com.gitblit.manager.IAuthenticationManager;
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import com.gitblit.models.UserModel;
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public class SshKrbAuthenticator extends GSSAuthenticator {
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protected final Logger log = LoggerFactory.getLogger(getClass());
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protected final IAuthenticationManager authManager;
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protected final boolean stripDomain;
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public SshKrbAuthenticator(IStoredSettings settings, IAuthenticationManager authManager) {
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this.authManager = authManager;
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String keytabString = settings.getString(Keys.git.sshKrb5Keytab, "");
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if(! keytabString.isEmpty()) {
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setKeytabFile(keytabString);
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}
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String servicePrincipalName = settings.getString(Keys.git.sshKrb5ServicePrincipalName, "");
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if(! servicePrincipalName.isEmpty()) {
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setServicePrincipalName(servicePrincipalName);
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}
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this.stripDomain = settings.getBoolean(Keys.git.sshKrb5StripDomain, false);
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}
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@Override
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public boolean validateIdentity(ServerSession session, String identity) {
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log.info("identify with kerberos {}", identity);
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SshDaemonClient client = session.getAttribute(SshDaemonClient.KEY);
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if (client.getUser() != null) {
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log.info("{} has already authenticated!", identity);
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return true;
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}
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String username = identity.toLowerCase(Locale.US);
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if (stripDomain) {
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int p = username.indexOf('@');
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if (p > 0) {
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username = username.substring(0, p);
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}
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}
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UserModel user = authManager.authenticate(username);
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if (user != null) {
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client.setUser(user);
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return true;
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}
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log.warn("could not authenticate {} for SSH", username);
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return false;
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}
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}
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