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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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/*
 * ====================================================================
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * .
 *
 */
package org.apache.http.impl.client;

import java.net.Authenticator;
import java.net.PasswordAuthentication;
import java.util.Locale;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

import org.apache.http.HttpHost;
import org.apache.http.annotation.Contract;
import org.apache.http.annotation.ThreadingBehavior;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.Credentials;
import org.apache.http.auth.NTCredentials;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.CredentialsProvider;
import org.apache.http.client.config.AuthSchemes;
import org.apache.http.util.Args;

/**
 * Implementation of {@link CredentialsProvider} backed by standard
 * JRE {@link Authenticator}.
 *
 * @since 4.3
 */
@Contract(threading = ThreadingBehavior.SAFE)
public class SystemDefaultCredentialsProvider implements CredentialsProvider {

    private static final Map SCHEME_MAP;

    static {
        SCHEME_MAP = new ConcurrentHashMap();
        SCHEME_MAP.put(AuthSchemes.BASIC.toUpperCase(Locale.ROOT), "Basic");
        SCHEME_MAP.put(AuthSchemes.DIGEST.toUpperCase(Locale.ROOT), "Digest");
        SCHEME_MAP.put(AuthSchemes.NTLM.toUpperCase(Locale.ROOT), "NTLM");
        SCHEME_MAP.put(AuthSchemes.SPNEGO.toUpperCase(Locale.ROOT), "SPNEGO");
        SCHEME_MAP.put(AuthSchemes.KERBEROS.toUpperCase(Locale.ROOT), "Kerberos");
    }

    private static String translateScheme(final String key) {
        if (key == null) {
            return null;
        }
        final String s = SCHEME_MAP.get(key);
        return s != null ? s : key;
    }

    private final BasicCredentialsProvider internal;

    /**
     * Default constructor.
     */
    public SystemDefaultCredentialsProvider() {
        super();
        this.internal = new BasicCredentialsProvider();
    }

    @Override
    public void setCredentials(final AuthScope authscope, final Credentials credentials) {
        internal.setCredentials(authscope, credentials);
    }

    private static PasswordAuthentication getSystemCreds(
            final String protocol,
            final AuthScope authscope,
            final Authenticator.RequestorType requestorType) {
        return Authenticator.requestPasswordAuthentication(
                authscope.getHost(),
                null,
                authscope.getPort(),
                protocol,
                null,
                translateScheme(authscope.getScheme()),
                null,
                requestorType);
    }

    @Override
    public Credentials getCredentials(final AuthScope authscope) {
        Args.notNull(authscope, "Auth scope");
        final Credentials localcreds = internal.getCredentials(authscope);
        if (localcreds != null) {
            return localcreds;
        }
        final String host = authscope.getHost();
        if (host != null) {
            final HttpHost origin = authscope.getOrigin();
            final String protocol = origin != null ? origin.getSchemeName() : (authscope.getPort() == 443 ? "https" : "http");
            PasswordAuthentication systemcreds = getSystemCreds(protocol, authscope, Authenticator.RequestorType.SERVER);
            if (systemcreds == null) {
                systemcreds = getSystemCreds(protocol, authscope, Authenticator.RequestorType.PROXY);
            }
            if (systemcreds == null) {
                // Look for values given using http.proxyUser/http.proxyPassword or
                // https.proxyUser/https.proxyPassword. We cannot simply use the protocol from
                // the origin since a proxy retrieved from https.proxyHost/https.proxyPort will
                // still use http as protocol
                systemcreds = getProxyCredentials("http", authscope);
                if (systemcreds == null) {
                    systemcreds = getProxyCredentials("https", authscope);
                }
            }
            if (systemcreds != null) {
                final String domain = System.getProperty("http.auth.ntlm.domain");
                if (domain != null) {
                    return new NTCredentials(
                            systemcreds.getUserName(),
                            new String(systemcreds.getPassword()),
                            null, domain);
                }
                return AuthSchemes.NTLM.equalsIgnoreCase(authscope.getScheme())
                                // Domain may be specified in a fully qualified user name
                                ? new NTCredentials(systemcreds.getUserName(),
                                                new String(systemcreds.getPassword()), null, null)
                                : new UsernamePasswordCredentials(systemcreds.getUserName(),
                                                new String(systemcreds.getPassword()));
            }
        }
        return null;
    }

    private static PasswordAuthentication getProxyCredentials(final String protocol, final AuthScope authscope) {
        final String proxyHost = System.getProperty(protocol + ".proxyHost");
        if (proxyHost == null) {
            return null;
        }
        final String proxyPort = System.getProperty(protocol + ".proxyPort");
        if (proxyPort == null) {
            return null;
        }

        try {
            final AuthScope systemScope = new AuthScope(proxyHost, Integer.parseInt(proxyPort));
            if (authscope.match(systemScope) >= 0) {
                final String proxyUser = System.getProperty(protocol + ".proxyUser");
                if (proxyUser == null) {
                    return null;
                }
                final String proxyPassword = System.getProperty(protocol + ".proxyPassword");

                return new PasswordAuthentication(proxyUser,
                        proxyPassword != null ? proxyPassword.toCharArray() : new char[] {});
            }
        } catch (final NumberFormatException ex) {
        }

        return null;
    }

    @Override
    public void clear() {
        internal.clear();
    }

}