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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.digest;

import static org.wildfly.security.mechanism._private.ElytronMessages.saslDigest;
import static org.wildfly.security.provider.util.ProviderUtil.INSTALLED_PROVIDERS;

import java.io.IOException;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import java.security.Provider;
import java.util.Collections;
import java.util.HashSet;
import java.util.Locale;
import java.util.Map;
import java.util.Set;
import java.util.StringTokenizer;
import java.util.function.Predicate;
import java.util.function.Supplier;

import javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.UnsupportedCallbackException;
import javax.security.sasl.Sasl;
import javax.security.sasl.SaslException;
import javax.security.sasl.SaslServer;
import javax.security.sasl.SaslServerFactory;

import org.kohsuke.MetaInfServices;
import org.wildfly.common.Assert;
import org.wildfly.security.auth.callback.AvailableRealmsCallback;
import org.wildfly.security.sasl.WildFlySasl;

/**
 * @author Peter Skopek
 *
 */
@MetaInfServices(value = SaslServerFactory.class)
public class DigestServerFactory extends AbstractDigestFactory implements SaslServerFactory {

    private final Supplier providers;

    public DigestServerFactory() {
        providers = INSTALLED_PROVIDERS;
    }

    public DigestServerFactory(final Provider provider) {
        providers = () -> new Provider[] { provider };
    }

    /* (non-Javadoc)
     * @see javax.security.sasl.SaslServerFactory#createSaslServer(java.lang.String, java.lang.String, java.lang.String, java.util.Map, javax.security.auth.callback.CallbackHandler)
     */
    @Override
    public SaslServer createSaslServer(String mechanism, String protocol, String serverName, Map props,
            CallbackHandler cbh) throws SaslException {
        if (! matches(props, false) || ! matchesMech(mechanism)) {
            return null;
        }
        Assert.checkNotNullParam("cbh", cbh);
        if (props == null) props = Collections.emptyMap();

        String[] realms = null;
        final AvailableRealmsCallback availableRealmsCallback = new AvailableRealmsCallback();
        try {
            cbh.handle(new Callback[] { availableRealmsCallback });
            realms = availableRealmsCallback.getRealmNames();
        } catch (UnsupportedCallbackException ignored) {
        } catch (SaslException e) {
            throw e;
        } catch (IOException e) {
            throw saslDigest.mechCallbackHandlerFailedForUnknownReason(e).toSaslException();
        }
        final boolean defaultRealm;
        if (realms == null) {
            defaultRealm = true;
            realms = new String[] { serverName };
        } else {
            defaultRealm = false;
        }

        final String utf8 = (String)props.get(WildFlySasl.USE_UTF8);
        Charset charset = (utf8 == null || Boolean.parseBoolean(utf8)) ? StandardCharsets.UTF_8 : StandardCharsets.ISO_8859_1;

        String qopsString = (String)props.get(Sasl.QOP);
        String[] qops = qopsString == null ? null : qopsString.split(",");

        String supportedCipherOpts = (String)props.get(WildFlySasl.SUPPORTED_CIPHER_NAMES);
        String[] cipherOpts = (supportedCipherOpts == null ? null : supportedCipherOpts.split(","));

        final Predicate protocolTest;
        String alternativeProtocols = (String)props.get(WildFlySasl.ALTERNATIVE_PROTOCOLS);
        if (alternativeProtocols != null) {
            final Set acceptableProtocols = new HashSet<>();
            acceptableProtocols.add(protocol.toLowerCase(Locale.ROOT));

            StringTokenizer parser = new StringTokenizer(alternativeProtocols, ", \t\n");
            while (parser.hasMoreTokens()) {
                acceptableProtocols.add(parser.nextToken().trim().toLowerCase(Locale.ROOT));
            }
            protocolTest = acceptableProtocols::contains;
        } else {
            protocolTest = protocol.toLowerCase(Locale.ROOT)::equals;
        }

        final DigestSaslServer server = new DigestSaslServer(realms, defaultRealm, mechanism, protocol, serverName, cbh, charset, qops, cipherOpts, protocolTest, providers);
        server.init();
        return server;
    }
}