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/*-
* ============LICENSE_START=======================================================
* ONAP
* ================================================================================
* Copyright (C) 2021 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Licensed 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.
* ============LICENSE_END=========================================================
*/
package org.onap.policy.common.utils.security;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.math.BigInteger;
import java.nio.file.Files;
import java.security.KeyPairGenerator;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.security.cert.Certificate;
import java.security.cert.CertificateException;
import java.util.Arrays;
import java.util.Date;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;
import lombok.Getter;
import org.bouncycastle.asn1.x500.X500Name;
import org.bouncycastle.asn1.x509.Extension;
import org.bouncycastle.asn1.x509.GeneralName;
import org.bouncycastle.asn1.x509.GeneralNames;
import org.bouncycastle.asn1.x509.SubjectPublicKeyInfo;
import org.bouncycastle.cert.X509CertificateHolder;
import org.bouncycastle.cert.X509v3CertificateBuilder;
import org.bouncycastle.cert.jcajce.JcaX509CertificateConverter;
import org.bouncycastle.jcajce.provider.BouncyCastleFipsProvider;
import org.bouncycastle.operator.ContentSigner;
import org.bouncycastle.operator.OperatorCreationException;
import org.bouncycastle.operator.jcajce.JcaContentSignerBuilder;
import org.onap.policy.common.utils.resources.ResourceUtils;
/**
* Keystore, containing a self-signed certificate, valid for one day (see the argument to
* the "-valid" flag below). For use in junit tests.
*/
@Getter
public class SelfSignedKeyStore {
public static final String KEYSTORE_PASSWORD = "Pol1cy_0nap";
public static final String PRIVATE_KEY_PASSWORD = KEYSTORE_PASSWORD;
public static final String RELATIVE_PATH = "target/test-classes/policy-keystore";
/**
* File containing subject-alternative names (i.e., list of servers that may use this
* keystore).
*/
private static final String KEYSTORE_SAN = "keystore_san.txt";
private final String keystoreName;
/**
* Generates the keystore, if it does not exist or if it's more than a few hours old.
*
* @throws IOException if an I/O error occurs
* @throws InterruptedException if an interrupt occurs
*/
public SelfSignedKeyStore() throws IOException, InterruptedException {
this(RELATIVE_PATH);
}
/**
* Generates the keystore, if it does not exist or if it's more than a few hours old.
*
* @param relativePath path to the keystore, relative to the "user.dir" system
* property
* @throws IOException if an I/O error occurs
* @throws InterruptedException if an interrupt occurs
*/
public SelfSignedKeyStore(String relativePath) throws IOException, InterruptedException {
keystoreName = System.getProperty("user.dir") + "/" + relativePath;
// use existing file if it isn't too old
var keystoreFile = new File(keystoreName);
if (keystoreFile.exists()) {
if (System.currentTimeMillis() < keystoreFile.lastModified()
+ TimeUnit.MILLISECONDS.convert(5, TimeUnit.HOURS)) {
return;
}
Files.delete(keystoreFile.toPath());
}
/*
* Read the list of subject-alternative names, joining the lines with commas, and
* dropping the trailing comma.
*/
String sanFileName = getKeystoreSanName();
var sanString = ResourceUtils.getResourceAsString(sanFileName);
if (sanString == null) {
throw new FileNotFoundException(sanFileName);
}
var sanArray = sanString.replace("DNS:", "").replace("\r", "").split("\n");
GeneralName[] nameArray = Arrays.stream(sanArray).map(name -> new GeneralName(GeneralName.dNSName, name))
.toList().toArray(new GeneralName[0]);
final var names = new GeneralNames(nameArray);
try (var ostr = new FileOutputStream(keystoreFile)) {
var keyPairGenerator = KeyPairGenerator.getInstance("RSA");
keyPairGenerator.initialize(2048);
final var keyPair = keyPairGenerator.generateKeyPair();
final long tcur = System.currentTimeMillis();
final var dn = new X500Name("C=US, O=ONAP, OU=OSAAF, OU=policy@policy.onap.org:DEV, CN=policy");
final var serial = BigInteger.valueOf(new SecureRandom().nextInt());
final var notBefore = new Date(tcur);
final var notAfter = new Date(tcur + TimeUnit.MILLISECONDS.convert(365, TimeUnit.DAYS));
final var pubKeyInfo = SubjectPublicKeyInfo.getInstance(keyPair.getPublic().getEncoded());
ContentSigner signer = new JcaContentSignerBuilder("SHA256WithRSA")
.setProvider(new BouncyCastleFipsProvider()).build(keyPair.getPrivate());
X509CertificateHolder holder = new X509v3CertificateBuilder(dn, serial, notBefore, notAfter, dn, pubKeyInfo)
.addExtension(Extension.subjectAlternativeName, false, names).build(signer);
var cert = new JcaX509CertificateConverter().setProvider(new BouncyCastleFipsProvider())
.getCertificate(holder);
final Certificate[] chain = {cert};
var keystore = KeyStore.getInstance("PKCS12");
keystore.load(null, null);
keystore.setKeyEntry("policy@policy.onap.org", keyPair.getPrivate(), PRIVATE_KEY_PASSWORD.toCharArray(),
chain);
keystore.store(ostr, KEYSTORE_PASSWORD.toCharArray());
} catch (NoSuchAlgorithmException | OperatorCreationException | CertificateException | KeyStoreException e) {
throw new IOException("cannot create certificate", e);
}
}
// may be overridden by junit tests
protected String getKeystoreSanName() {
return KEYSTORE_SAN;
}
}
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