io.netty.handler.ssl.util.BouncyCastleSelfSignedCertGenerator 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:
 *
 *   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.util;

import org.bouncycastle.asn1.x500.X500Name;
import org.bouncycastle.cert.X509CertificateHolder;
import org.bouncycastle.cert.X509v3CertificateBuilder;
import org.bouncycastle.cert.jcajce.JcaX509CertificateConverter;
import org.bouncycastle.cert.jcajce.JcaX509v3CertificateBuilder;
import org.bouncycastle.operator.ContentSigner;
import org.bouncycastle.operator.jcajce.JcaContentSignerBuilder;

import java.math.BigInteger;
import java.security.KeyPair;
import java.security.PrivateKey;
import java.security.Provider;
import java.security.SecureRandom;
import java.security.cert.X509Certificate;
import java.util.Date;

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

/**
 * Generates a self-signed certificate using Bouncy Castle.
 */
final class BouncyCastleSelfSignedCertGenerator {

    private static final Provider PROVIDER;

    static {
        Class providerClass;
        try {
            providerClass = Class.forName("org.bouncycastle.jce.provider.BouncyCastleProvider");
        } catch (ClassNotFoundException e) {
            try {
                providerClass = Class.forName("org.bouncycastle.jcajce.provider.BouncyCastleFipsProvider");
            } catch (ClassNotFoundException ignore) {
                throw new RuntimeException("Neither BouncyCastleProvider nor BouncyCastleFipsProvider found");
            }
        }
        try {
            PROVIDER = (Provider) providerClass.newInstance();
        } catch (Exception e) {
            throw new RuntimeException("Failed to instantiate BouncyCastle provider", e);
        }
    }

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

        // Prepare the information required for generating an X.509 certificate.
        X500Name owner = new X500Name("CN=" + fqdn);
        X509v3CertificateBuilder builder = new JcaX509v3CertificateBuilder(
                owner, new BigInteger(64, random), notBefore, notAfter, owner, keypair.getPublic());

        ContentSigner signer = new JcaContentSignerBuilder(
                algorithm.equalsIgnoreCase("EC") ? "SHA256withECDSA" : "SHA256WithRSAEncryption").build(key);
        X509CertificateHolder certHolder = builder.build(signer);
        X509Certificate cert = new JcaX509CertificateConverter().setProvider(PROVIDER).getCertificate(certHolder);
        cert.verify(keypair.getPublic());

        return newSelfSignedCertificate(fqdn, key, cert);
    }

    private BouncyCastleSelfSignedCertGenerator() { }
}