/**
* Copyright 2016 Yahoo Inc.
*
* 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.yahoo.pulsar.broker.authentication;
import java.io.Closeable;
import java.io.IOException;
import java.util.Map;
import javax.naming.AuthenticationException;
import javax.servlet.http.HttpServletRequest;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.collect.Maps;
import com.yahoo.pulsar.broker.PulsarServerException;
import com.yahoo.pulsar.broker.ServiceConfiguration;
/**
* Authentication service
*
*/
public class AuthenticationService implements Closeable {
private static final Logger LOG = LoggerFactory.getLogger(AuthenticationService.class);
private final Map<String, AuthenticationProvider> providers = Maps.newHashMap();
public AuthenticationService(ServiceConfiguration conf) throws PulsarServerException {
if (conf.isAuthenticationEnabled()) {
try {
AuthenticationProvider provider;
for (String className : conf.getAuthenticationProviders()) {
if (className.isEmpty()) {
continue;
}
provider = (AuthenticationProvider) Class.forName(className).newInstance();
provider.initialize(conf);
providers.put(provider.getAuthMethodName(), provider);
LOG.info("{} has been loaded.", className);
}
if (providers.isEmpty()) {
LOG.warn("No authentication providers are loaded.");
}
} catch (Throwable e) {
throw new PulsarServerException("Failed to load an authentication provider.", e);
}
} else {
LOG.info("Authentication is disabled");
}
}
public String authenticate(AuthenticationDataSource authData, String authMethodName)
throws AuthenticationException {
AuthenticationProvider provider = providers.get(authMethodName);
if (provider != null) {
return provider.authenticate(authData);
} else {
throw new AuthenticationException("Unsupported authentication mode: " + authMethodName);
}
}
public String authenticateHttpRequest(HttpServletRequest request) throws AuthenticationException {
// Try to validate with any configured provider
AuthenticationDataSource authData = new AuthenticationDataHttps(request);
for (AuthenticationProvider provider : providers.values()) {
try {
return provider.authenticate(authData);
} catch (AuthenticationException e) {
// Ignore the exception because we don't know which authentication method is expected here.
}
}
// No authentication provided
if (!providers.isEmpty()) {
// If at least a provider was configured, then the authentication needs to be provider
throw new AuthenticationException("Authentication required");
} else {
// No authentication required
return "<none>";
}
}
@Override
public void close() throws IOException {
for (AuthenticationProvider provider : providers.values()) {
provider.close();
}
}
}