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/*============LICENSE_START=======================================================
* oom-truststore-merger
* ================================================================================
* Copyright (C) 2020-2021 Nokia. 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.oom.certservice.postprocessor.merger.model;
import static org.onap.oom.certservice.postprocessor.api.CertificateConstants.BOUNCY_CASTLE_PROVIDER;
import static org.onap.oom.certservice.postprocessor.api.CertificateConstants.X_509_CERTIFICATE;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.StringWriter;
import java.security.Security;
import java.security.cert.Certificate;
import java.security.cert.CertificateFactory;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.openssl.jcajce.JcaMiscPEMGenerator;
import org.bouncycastle.util.io.pem.PemObjectGenerator;
import org.bouncycastle.util.io.pem.PemWriter;
import org.onap.oom.certservice.postprocessor.common.FileTools;
import org.onap.oom.certservice.postprocessor.merger.exception.MissingTruststoreException;
import org.onap.oom.certservice.postprocessor.merger.exception.TruststoreDataOperationException;
import org.onap.oom.certservice.postprocessor.merger.exception.WriteTruststoreFileException;
import org.onap.oom.certservice.postprocessor.merger.model.certificate.CertificateWithAlias;
import org.onap.oom.certservice.postprocessor.merger.model.certificate.CertificateWithAliasFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class PemTruststore extends Truststore {
private static final Logger LOGGER = LoggerFactory.getLogger(PemTruststore.class);
private static final boolean APPEND_TO_FILE = true;
private final CertificateWithAliasFactory factory = new CertificateWithAliasFactory();
private final List<CertificateWithAlias> certificatesToBeSaved = new ArrayList<>();
public PemTruststore(File storeFile) {
super(storeFile, new FileTools());
}
public List<CertificateWithAlias> getCertificates()
throws TruststoreDataOperationException, MissingTruststoreException {
LOGGER.debug("Attempt to read certificates from file: {}", storeFile.getPath());
if (isFileWithoutPemCertificate()) {
throw new MissingTruststoreException("File does not contain any certificate");
}
List<Certificate> extractedCertificate = extractCertificatesFromFile();
return wrapCertificates(extractedCertificate);
}
public void addCertificates(List<CertificateWithAlias> certificates)
throws TruststoreDataOperationException, MissingTruststoreException {
LOGGER.debug("Attempt to add certificates for saving to file");
if (isFileWithoutPemCertificate()) {
LOGGER.error("File does not contain any certificate. File path: {} ", storeFile.getPath());
throw new MissingTruststoreException("File does not contain any certificate");
}
certificatesToBeSaved.addAll(certificates);
}
public void saveFile() throws WriteTruststoreFileException, TruststoreDataOperationException {
LOGGER.debug("Attempt to save file: {}", storeFile.getPath());
List<Certificate> certificates = certificatesToBeSaved.stream()
.map(CertificateWithAlias::getCertificate)
.collect(Collectors.toList());
String certificatesAsString = transformToStringInPemFormat(certificates);
appendToFile(certificatesAsString);
}
boolean isFileWithoutPemCertificate() throws TruststoreDataOperationException {
List<Certificate> certificateList = extractCertificatesFromFile();
return certificateList.isEmpty();
}
String transformToStringInPemFormat(List<Certificate> certificates) throws TruststoreDataOperationException {
StringWriter sw = new StringWriter();
List<PemObjectGenerator> generators = transformToPemGenerators(certificates);
try (PemWriter pemWriter = new PemWriter(sw)) {
for (PemObjectGenerator generator : generators) {
pemWriter.writeObject(generator);
}
} catch (IOException e) {
LOGGER.error("Cannot convert certificates to PEM format");
throw new TruststoreDataOperationException(e);
}
return sw.toString();
}
private List<Certificate> extractCertificatesFromFile() throws TruststoreDataOperationException {
try (FileInputStream inputStream = new FileInputStream(storeFile)) {
Security.addProvider(new BouncyCastleProvider());
CertificateFactory certFactory = CertificateFactory.getInstance(X_509_CERTIFICATE, BOUNCY_CASTLE_PROVIDER);
return new ArrayList<>(certFactory.generateCertificates(inputStream));
} catch (Exception e) {
LOGGER.error("Cannot read certificates from file: {}", storeFile.getPath());
throw new TruststoreDataOperationException(e);
}
}
private List<PemObjectGenerator> transformToPemGenerators(List<Certificate> certificates)
throws TruststoreDataOperationException {
List<PemObjectGenerator> generators = new ArrayList<>();
for (Certificate certificate : certificates) {
PemObjectGenerator generator = createPemGenerator(certificate);
generators.add(generator);
}
return generators;
}
private JcaMiscPEMGenerator createPemGenerator(Certificate certificate)
throws TruststoreDataOperationException {
try {
return new JcaMiscPEMGenerator(certificate);
} catch (IOException e) {
LOGGER.error("Cannot convert Certificate Object to PemGenerator Object");
throw new TruststoreDataOperationException(e);
}
}
private List<CertificateWithAlias> wrapCertificates(List<Certificate> rawCertificates) {
return rawCertificates.stream()
.map(factory::createPemCertificate)
.collect(Collectors.toList());
}
private void appendToFile(String certificatesAsString) throws WriteTruststoreFileException {
try (FileOutputStream fileOutputStream = new FileOutputStream(storeFile, APPEND_TO_FILE)) {
fileOutputStream.write(certificatesAsString.getBytes());
} catch (Exception e) {
LOGGER.error("Cannot write certificates to file");
throw new WriteTruststoreFileException(e);
}
}
}
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