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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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/*
 * Copyright 2014 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:
 *
 *   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 io.netty.handler.ssl;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.handler.codec.base64.Base64;
import io.netty.util.CharsetUtil;
import io.netty.util.internal.logging.InternalLogger;
import io.netty.util.internal.logging.InternalLoggerFactory;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.security.KeyException;
import java.security.KeyStore;
import java.security.cert.CertificateException;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * Reads a PEM file and converts it into a list of DERs so that they are imported into a {@link KeyStore} easily.
 */
final class PemReader {

    private static final InternalLogger logger = InternalLoggerFactory.getInstance(PemReader.class);

    private static final Pattern CERT_PATTERN = Pattern.compile(
            "-+BEGIN\\s+.*CERTIFICATE[^-]*-+(?:\\s|\\r|\\n)+" + // Header
                    "([a-z0-9+/=\\r\\n]+)" +                    // Base64 text
                    "-+END\\s+.*CERTIFICATE[^-]*-+",            // Footer
            Pattern.CASE_INSENSITIVE);
    private static final Pattern KEY_PATTERN = Pattern.compile(
            "-+BEGIN\\s+.*PRIVATE\\s+KEY[^-]*-+(?:\\s|\\r|\\n)+" + // Header
                    "([a-z0-9+/=\\r\\n]+)" +                       // Base64 text
                    "-+END\\s+.*PRIVATE\\s+KEY[^-]*-+",            // Footer
            Pattern.CASE_INSENSITIVE);

    static ByteBuf[] readCertificates(File file) throws CertificateException {
        String content;
        try {
            content = readContent(file);
        } catch (IOException e) {
            throw new CertificateException("failed to read a file: " + file, e);
        }

        List certs = new ArrayList();
        Matcher m = CERT_PATTERN.matcher(content);
        int start = 0;
        for (;;) {
            if (!m.find(start)) {
                break;
            }

            ByteBuf base64 = Unpooled.copiedBuffer(m.group(1), CharsetUtil.US_ASCII);
            ByteBuf der = Base64.decode(base64);
            base64.release();
            certs.add(der);

            start = m.end();
        }

        if (certs.isEmpty()) {
            throw new CertificateException("found no certificates: " + file);
        }

        return certs.toArray(new ByteBuf[certs.size()]);
    }

    static ByteBuf readPrivateKey(File file) throws KeyException {
        String content;
        try {
            content = readContent(file);
        } catch (IOException e) {
            throw new KeyException("failed to read a file: " + file, e);
        }

        Matcher m = KEY_PATTERN.matcher(content);
        if (!m.find()) {
            throw new KeyException("found no private key: " + file);
        }

        ByteBuf base64 = Unpooled.copiedBuffer(m.group(1), CharsetUtil.US_ASCII);
        ByteBuf der = Base64.decode(base64);
        base64.release();
        return der;
    }

    private static String readContent(File file) throws IOException {
        InputStream in = new FileInputStream(file);
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        try {
            byte[] buf = new byte[8192];
            for (;;) {
                int ret = in.read(buf);
                if (ret < 0) {
                    break;
                }
                out.write(buf, 0, ret);
            }
            return out.toString(CharsetUtil.US_ASCII.name());
        } finally {
            safeClose(in);
            safeClose(out);
        }
    }

    private static void safeClose(InputStream in) {
        try {
            in.close();
        } catch (IOException e) {
            logger.warn("Failed to close a stream.", e);
        }
    }

    private static void safeClose(OutputStream out) {
        try {
            out.close();
        } catch (IOException e) {
            logger.warn("Failed to close a stream.", e);
        }
    }

    private PemReader() { }
}