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/*
* ============LICENSE_START=======================================================
* Copyright (C) 2021 Nordix Foundation
* ================================================================================
* 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.openecomp.sdc.be.csar.security;
import java.io.File;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.security.Key;
import java.security.Security;
import java.security.cert.Certificate;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.stream.Collectors;
import org.apache.commons.io.FilenameUtils;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.openecomp.sdc.be.csar.security.api.CertificateManager;
import org.openecomp.sdc.be.csar.security.api.CertificateReader;
import org.openecomp.sdc.be.csar.security.api.PrivateKeyReader;
import org.openecomp.sdc.be.csar.security.api.model.CertificateInfo;
import org.openecomp.sdc.be.csar.security.exception.CertificateNotFoundException;
import org.openecomp.sdc.be.csar.security.model.CertificateInfoImpl;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.env.Environment;
import org.springframework.stereotype.Component;
@Component
public class CertificateManagerImpl implements CertificateManager {
private static final Logger LOGGER = LoggerFactory.getLogger(CertificateManagerImpl.class);
private final PrivateKeyReader privateKeyReader;
private final CertificateReader certificateReader;
private final Environment environment;
private Path certificateDirectoryPath;
private File certificateDirectory;
private final Map<String, CertificateInfo> certificateMap = new HashMap<>();
public static final String CERT_DIR_ENV_VARIABLE = "SDC_CERT_DIR";
public CertificateManagerImpl(final PrivateKeyReader privateKeyReader,
final CertificateReader certificateReader,
final Environment environment) {
this.certificateReader = certificateReader;
this.privateKeyReader = privateKeyReader;
this.environment = environment;
init();
}
private void init() {
if (Security.getProvider(BouncyCastleProvider.PROVIDER_NAME) == null) {
Security.addProvider(new BouncyCastleProvider());
}
final String certificateDir = environment.getProperty(CERT_DIR_ENV_VARIABLE);
if (certificateDir == null) {
LOGGER.warn("Environment variable '{}' was not provided. Could not load certificates.", CERT_DIR_ENV_VARIABLE);
return;
}
try {
this.certificateDirectoryPath = Paths.get(certificateDir);
} catch (final Exception e) {
LOGGER.error("Invalid path '{}' provided in the environment variable '{}'. Could not load certificates.",
certificateDir, CERT_DIR_ENV_VARIABLE, e);
return;
}
try {
loadCertificateDirectory();
} catch (final Exception e) {
LOGGER.error("Could not load certificate directory", e);
return;
}
try {
loadCertificates();
} catch (final Exception e) {
LOGGER.error("Could not load certificates", e);
}
}
private void loadCertificates() {
final File[] files = certificateDirectory.listFiles();
if (files == null || files.length == 0) {
LOGGER.warn("Certificate directory is empty. No trusted certificate found.");
return;
}
final List<File> certFileList = Arrays.stream(files)
.filter(file -> "cert".equals(FilenameUtils.getExtension(file.getName())))
.collect(Collectors.toList());
final List<File> keyFileList = Arrays.stream(files)
.filter(file -> "key".equals(FilenameUtils.getExtension(file.getName())))
.collect(Collectors.toList());
if (certFileList.isEmpty()) {
LOGGER.error("Certificate directory is empty. No trusted certificate found.");
return;
}
certFileList.forEach(certFile -> {
final String baseFileName = FilenameUtils.getBaseName(certFile.getName());
final Certificate certificate = loadCertificate(certFile);
final Optional<File> keyFileOptional = keyFileList.stream().filter(
keyFile1 -> FilenameUtils.getBaseName(keyFile1.getName())
.equals(baseFileName)).findFirst();
keyFileOptional.ifPresentOrElse(
keyFile -> {
final CertificateInfoImpl certificateInfo =
new CertificateInfoImpl(certFile, certificate, keyFile, loadPrivateKey(keyFile));
if (certificateInfo.isValid()) {
certificateMap.put(baseFileName, certificateInfo);
}
},
() -> {
final CertificateInfoImpl certificateInfo = new CertificateInfoImpl(certFile, certificate);
if (certificateInfo.isValid()) {
certificateMap.put(baseFileName, new CertificateInfoImpl(certFile, certificate));
}
}
);
});
}
private void loadCertificateDirectory() {
final File file = certificateDirectoryPath.toFile();
if (!file.exists() || !file.isDirectory()) {
final String errorMsg =
String.format("Provided certificate path '%s' is not a directory or does not exist",
certificateDirectoryPath);
throw new CertificateNotFoundException(errorMsg);
}
this.certificateDirectory = file;
}
private Certificate loadCertificate(final File certFile) {
return certificateReader.loadCertificate(certFile);
}
private Key loadPrivateKey(final File privateKeyFile) {
return privateKeyReader.loadPrivateKey(privateKeyFile);
}
@Override
public Optional<CertificateInfo> getCertificate(final String certName) {
return Optional.ofNullable(certificateMap.get(certName));
}
}
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