org.glowroot.central.SaslCallbackHandler Maven / Gradle / Ivy
/*
* Copyright 2017 the original author or authors.
*
* 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 org.glowroot.central;
import java.io.IOException;
import javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.NameCallback;
import javax.security.auth.callback.PasswordCallback;
import javax.security.auth.callback.UnsupportedCallbackException;
import javax.security.sasl.AuthorizeCallback;
import javax.security.sasl.RealmCallback;
import com.google.common.base.Strings;
public class SaslCallbackHandler implements CallbackHandler {
private final char[] password;
public SaslCallbackHandler() {
String jgroupsPassword = System.getProperty("jgroups.password");
if (Strings.isNullOrEmpty(jgroupsPassword)) {
throw new IllegalStateException("jgroups.password in glowroot-central.properties is"
+ " required, this can be set to any text, and is used by the glowroot central"
+ " nodes to authenticate with one another and prevent rogue nodes from joining"
+ " the cluster");
}
password = jgroupsPassword.toCharArray();
}
@Override
public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException {
for (Callback callback : callbacks) {
if (callback instanceof AuthorizeCallback) {
AuthorizeCallback authorizeCallback = (AuthorizeCallback) callback;
String authenticationId = authorizeCallback.getAuthenticationID();
String authorizationId = authorizeCallback.getAuthorizationID();
authorizeCallback.setAuthorized(authenticationId.equals(authorizationId));
} else if (callback instanceof NameCallback) {
((NameCallback) callback).setName("glowroot");
} else if (callback instanceof PasswordCallback) {
((PasswordCallback) callback).setPassword(password);
} else if (callback instanceof RealmCallback) {
((RealmCallback) callback).setText("glowroot");
}
}
}
}