/*
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* Copyright 2011 gitblit.com.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.gitblit;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileOutputStream;
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import java.math.BigInteger;
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import java.security.KeyPair;
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import java.security.KeyPairGenerator;
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import java.security.KeyStore;
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import java.security.SecureRandom;
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import java.security.Security;
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import java.security.cert.X509Certificate;
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import java.util.Date;
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import javax.security.auth.x500.X500Principal;
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import org.bouncycastle.asn1.x500.X500NameBuilder;
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import org.bouncycastle.asn1.x500.style.BCStyle;
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import org.bouncycastle.cert.X509v3CertificateBuilder;
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import org.bouncycastle.cert.jcajce.JcaX509CertificateConverter;
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import org.bouncycastle.cert.jcajce.JcaX509v3CertificateBuilder;
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import org.bouncycastle.operator.ContentSigner;
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import org.bouncycastle.operator.jcajce.JcaContentSignerBuilder;
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import com.beust.jcommander.JCommander;
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import com.beust.jcommander.Parameter;
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import com.beust.jcommander.ParameterException;
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import com.beust.jcommander.Parameters;
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import com.gitblit.utils.TimeUtils;
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/**
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* Utility class to generate self-signed certificates.
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*
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* @author James Moger
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*
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*/
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public class MakeCertificate {
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private static final String BC = org.bouncycastle.jce.provider.BouncyCastleProvider.PROVIDER_NAME;
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public static void main(String... args) {
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Params params = new Params();
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JCommander jc = new JCommander(params);
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try {
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jc.parse(args);
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} catch (ParameterException t) {
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System.err.println(t.getMessage());
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jc.usage();
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}
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File keystore = new File("keystore");
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generateSelfSignedCertificate(params.hostname, keystore, params.storePassword,
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params.subject);
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}
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public static void generateSelfSignedCertificate(String hostname, File keystore,
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String keystorePassword) {
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try {
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Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
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KeyPairGenerator kpGen = KeyPairGenerator.getInstance("RSA", "BC");
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kpGen.initialize(1024, new SecureRandom());
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KeyPair pair = kpGen.generateKeyPair();
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// Generate self-signed certificate
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X500NameBuilder builder = new X500NameBuilder(BCStyle.INSTANCE);
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builder.addRDN(BCStyle.OU, Constants.NAME);
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builder.addRDN(BCStyle.O, Constants.NAME);
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builder.addRDN(BCStyle.CN, hostname);
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Date notBefore = new Date(System.currentTimeMillis() - TimeUtils.ONEDAY);
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Date notAfter = new Date(System.currentTimeMillis() + 10 * TimeUtils.ONEYEAR);
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BigInteger serial = BigInteger.valueOf(System.currentTimeMillis());
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X509v3CertificateBuilder certGen = new JcaX509v3CertificateBuilder(builder.build(),
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serial, notBefore, notAfter, builder.build(), pair.getPublic());
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ContentSigner sigGen = new JcaContentSignerBuilder("SHA256WithRSAEncryption")
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.setProvider(BC).build(pair.getPrivate());
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X509Certificate cert = new JcaX509CertificateConverter().setProvider(BC)
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.getCertificate(certGen.build(sigGen));
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cert.checkValidity(new Date());
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cert.verify(cert.getPublicKey());
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// Save to keystore
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KeyStore store = KeyStore.getInstance("JKS");
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if (keystore.exists()) {
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FileInputStream fis = new FileInputStream(keystore);
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store.load(fis, keystorePassword.toCharArray());
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fis.close();
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} else {
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store.load(null);
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}
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store.setKeyEntry(hostname, pair.getPrivate(), keystorePassword.toCharArray(),
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new java.security.cert.Certificate[] { cert });
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FileOutputStream fos = new FileOutputStream(keystore);
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store.store(fos, keystorePassword.toCharArray());
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fos.close();
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} catch (Throwable t) {
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t.printStackTrace();
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throw new RuntimeException("Failed to generate self-signed certificate!", t);
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}
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}
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public static void generateSelfSignedCertificate(String hostname, File keystore,
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String keystorePassword, String info) {
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try {
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Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
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KeyPairGenerator kpGen = KeyPairGenerator.getInstance("RSA", "BC");
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kpGen.initialize(1024, new SecureRandom());
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KeyPair pair = kpGen.generateKeyPair();
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// Generate self-signed certificate
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X500Principal principal = new X500Principal(info);
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Date notBefore = new Date(System.currentTimeMillis() - TimeUtils.ONEDAY);
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Date notAfter = new Date(System.currentTimeMillis() + 10 * TimeUtils.ONEYEAR);
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BigInteger serial = BigInteger.valueOf(System.currentTimeMillis());
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X509v3CertificateBuilder certGen = new JcaX509v3CertificateBuilder(principal, serial,
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notBefore, notAfter, principal, pair.getPublic());
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ContentSigner sigGen = new JcaContentSignerBuilder("SHA256WithRSAEncryption")
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.setProvider(BC).build(pair.getPrivate());
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X509Certificate cert = new JcaX509CertificateConverter().setProvider(BC)
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.getCertificate(certGen.build(sigGen));
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cert.checkValidity(new Date());
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cert.verify(cert.getPublicKey());
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// Save to keystore
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KeyStore store = KeyStore.getInstance("JKS");
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if (keystore.exists()) {
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FileInputStream fis = new FileInputStream(keystore);
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store.load(fis, keystorePassword.toCharArray());
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fis.close();
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} else {
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store.load(null);
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}
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store.setKeyEntry(hostname, pair.getPrivate(), keystorePassword.toCharArray(),
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new java.security.cert.Certificate[] { cert });
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FileOutputStream fos = new FileOutputStream(keystore);
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store.store(fos, keystorePassword.toCharArray());
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fos.close();
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} catch (Throwable t) {
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t.printStackTrace();
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throw new RuntimeException("Failed to generate self-signed certificate!", t);
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}
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}
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/**
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* JCommander Parameters class for MakeCertificate.
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*/
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@Parameters(separators = " ")
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private static class Params {
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private static final FileSettings FILESETTINGS = new FileSettings(Constants.PROPERTIES_FILE);
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@Parameter(names = { "--hostname" }, description = "Server Hostname", required = true)
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public String hostname;
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@Parameter(names = { "--subject" }, description = "Certificate subject", required = true)
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public String subject;
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@Parameter(names = "--storePassword", description = "Password for SSL (https) keystore.")
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public String storePassword = FILESETTINGS.getString(Keys.server.storePassword, "");
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}
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}
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