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This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2014 Red Hat, Inc., and individual contributors
 * as indicated by the @author tags.
 *
 * 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.wildfly.security.sasl.anonymous;

import static org.wildfly.security.mechanism._private.ElytronMessages.saslAnonymous;

import java.nio.charset.StandardCharsets;

import org.wildfly.common.Assert;
import org.wildfly.security.auth.callback.AnonymousAuthorizationCallback;
import org.wildfly.security.sasl.util.AbstractSaslServer;
import org.wildfly.security.sasl.util.SaslMechanismInformation;

import javax.security.auth.callback.CallbackHandler;
import javax.security.sasl.SaslException;

/**
 * A server implementation of the RFC 4505 {@code ANONYMOUS} mechanism.
 *
 * @author David M. Lloyd
 */
public final class AnonymousSaslServer extends AbstractSaslServer {

    private static final int INITIAL_STATE = 1;

    /**
     * Construct a new instance.
     *
     * @param protocol the protocol
     * @param serverName the server name
     * @param callbackHandler the callback handler
     */
    AnonymousSaslServer(final String protocol, final String serverName, final CallbackHandler callbackHandler) {
        super(SaslMechanismInformation.Names.ANONYMOUS, protocol, serverName, callbackHandler, saslAnonymous);
        setNegotiationState(INITIAL_STATE);
    }

    /** {@inheritDoc} */
    public String getAuthorizationID() {
        return "anonymous";
    }

    @Override
    protected byte[] evaluateMessage(int state, final byte[] message) throws SaslException {
        switch (state) {
            case INITIAL_STATE:
                int length = message.length;
                if (length == 0) {
                    // need initial challenge
                    return NO_BYTES;
                } else {
                    // sanity check
                    if (length > 1020) {
                        throw saslAnonymous.mechAuthenticationNameTooLong().toSaslException();
                    }
                    String name = new String(message, StandardCharsets.UTF_8);
                    if (name.length() > 255) {
                        throw saslAnonymous.mechAuthenticationNameTooLong().toSaslException();
                    }
                    final AnonymousAuthorizationCallback callback = new AnonymousAuthorizationCallback(name);
                    handleCallbacks(callback);
                    if (! callback.isAuthorized()) {
                        throw saslAnonymous.mechAnonymousAuthorizationDenied().toSaslException();
                    }
                    negotiationComplete();
                    return null;
                }
        }
        throw Assert.impossibleSwitchCase(state);
    }
}