io.netty.handler.ssl.util.OpenJdkSelfSignedCertGenerator Maven / Gradle / Ivy

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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.util;

import sun.security.x509.AlgorithmId;
import sun.security.x509.CertificateAlgorithmId;
import sun.security.x509.CertificateIssuerName;
import sun.security.x509.CertificateSerialNumber;
import sun.security.x509.CertificateSubjectName;
import sun.security.x509.CertificateValidity;
import sun.security.x509.CertificateVersion;
import sun.security.x509.CertificateX509Key;
import sun.security.x509.X500Name;
import sun.security.x509.X509CertImpl;
import sun.security.x509.X509CertInfo;

import java.util.Date;
import java.math.BigInteger;
import java.security.KeyPair;
import java.security.PrivateKey;
import java.security.SecureRandom;
import java.security.cert.CertificateException;

import static io.netty.handler.ssl.util.SelfSignedCertificate.*;

/**
 * Generates a self-signed certificate using {@code sun.security.x509} package provided by OpenJDK.
 */
final class OpenJdkSelfSignedCertGenerator {

    static String[] generate(String fqdn, KeyPair keypair, SecureRandom random, Date notBefore, Date notAfter)
            throws Exception {
        PrivateKey key = keypair.getPrivate();

        // Prepare the information required for generating an X.509 certificate.
        X509CertInfo info = new X509CertInfo();
        X500Name owner = new X500Name("CN=" + fqdn);
        info.set(X509CertInfo.VERSION, new CertificateVersion(CertificateVersion.V3));
        info.set(X509CertInfo.SERIAL_NUMBER, new CertificateSerialNumber(new BigInteger(64, random)));
        try {
            info.set(X509CertInfo.SUBJECT, new CertificateSubjectName(owner));
        } catch (CertificateException ignore) {
            info.set(X509CertInfo.SUBJECT, owner);
        }
        try {
            info.set(X509CertInfo.ISSUER, new CertificateIssuerName(owner));
        } catch (CertificateException ignore) {
            info.set(X509CertInfo.ISSUER, owner);
        }
        info.set(X509CertInfo.VALIDITY, new CertificateValidity(notBefore, notAfter));
        info.set(X509CertInfo.KEY, new CertificateX509Key(keypair.getPublic()));
        info.set(X509CertInfo.ALGORITHM_ID,
                new CertificateAlgorithmId(new AlgorithmId(AlgorithmId.sha1WithRSAEncryption_oid)));

        // Sign the cert to identify the algorithm that's used.
        X509CertImpl cert = new X509CertImpl(info);
        cert.sign(key, "SHA1withRSA");

        // Update the algorithm and sign again.
        info.set(CertificateAlgorithmId.NAME + '.' + CertificateAlgorithmId.ALGORITHM, cert.get(X509CertImpl.SIG_ALG));
        cert = new X509CertImpl(info);
        cert.sign(key, "SHA1withRSA");
        cert.verify(keypair.getPublic());

        return newSelfSignedCertificate(fqdn, key, cert);
    }

    private OpenJdkSelfSignedCertGenerator() { }
}