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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS 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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/*
 * Copyright 2023 The Netty Project
 *
 * The Netty Project 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:
 *
 *   https://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 io.netty.handler.ssl;

import io.netty.util.internal.SuppressJava6Requirement;

import javax.net.ssl.SSLEngine;
import javax.net.ssl.X509ExtendedTrustManager;
import javax.net.ssl.X509TrustManager;
import java.net.Socket;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.Collection;
import java.util.List;


/**
 * Wraps an existing {@link X509ExtendedTrustManager} and enhances the {@link CertificateException} that is thrown
 * because of hostname validation.
 */
@SuppressJava6Requirement(reason = "Usage guarded by java version check")
final class EnhancingX509ExtendedTrustManager extends X509ExtendedTrustManager {
    private final X509ExtendedTrustManager wrapped;

    EnhancingX509ExtendedTrustManager(X509TrustManager wrapped) {
        this.wrapped = (X509ExtendedTrustManager) wrapped;
    }

    @Override
    public void checkClientTrusted(X509Certificate[] chain, String authType, Socket socket)
            throws CertificateException {
        wrapped.checkClientTrusted(chain, authType, socket);
    }

    @Override
    public void checkServerTrusted(X509Certificate[] chain, String authType, Socket socket)
            throws CertificateException {
        try {
            wrapped.checkServerTrusted(chain, authType, socket);
        } catch (CertificateException e) {
            throwEnhancedCertificateException(chain, e);
        }
    }

    @Override
    public void checkClientTrusted(X509Certificate[] chain, String authType, SSLEngine engine)
            throws CertificateException {
        wrapped.checkClientTrusted(chain, authType, engine);
    }

    @Override
    public void checkServerTrusted(X509Certificate[] chain, String authType, SSLEngine engine)
            throws CertificateException {
        try {
            wrapped.checkServerTrusted(chain, authType, engine);
        } catch (CertificateException e) {
            throwEnhancedCertificateException(chain, e);
        }
    }

    @Override
    public void checkClientTrusted(X509Certificate[] chain, String authType)
            throws CertificateException {
        wrapped.checkClientTrusted(chain, authType);
    }

    @Override
    public void checkServerTrusted(X509Certificate[] chain, String authType)
            throws CertificateException {
        try {
            wrapped.checkServerTrusted(chain, authType);
        } catch (CertificateException e) {
            throwEnhancedCertificateException(chain, e);
        }
    }

    @Override
    public X509Certificate[] getAcceptedIssuers() {
        return wrapped.getAcceptedIssuers();
    }

    private static void throwEnhancedCertificateException(X509Certificate[] chain, CertificateException e)
            throws CertificateException {
        // Matching the message is the best we can do sadly.
        String message = e.getMessage();
        if (message != null && e.getMessage().startsWith("No subject alternative DNS name matching")) {
            StringBuilder names = new StringBuilder(64);
            for (int i = 0; i < chain.length; i++) {
                X509Certificate cert = chain[i];
                Collection> collection = cert.getSubjectAlternativeNames();
                if (collection != null) {
                    for (List altNames : collection) {
                        // 2 is dNSName. See X509Certificate javadocs.
                        if (altNames.size() >= 2 && ((Integer) altNames.get(0)).intValue() == 2) {
                            names.append((String) altNames.get(1)).append(",");
                        }
                    }
                }
            }
            if (names.length() != 0) {
                // Strip of ,
                names.setLength(names.length() - 1);
                throw new CertificateException(message +
                        " Subject alternative DNS names in the certificate chain of " + chain.length +
                        " certificate(s): " + names, e);
            }
        }
        throw e;
    }
}