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/*-
* ========================LICENSE_START=================================
* ONAP : ccsdk oran
* ======================================================================
* Copyright (C) 2019-2022 Nordix Foundation. 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.ccsdk.oran.a1policymanagementservice.clients;
import io.netty.handler.ssl.SslContext;
import io.netty.handler.ssl.SslContextBuilder;
import io.netty.handler.ssl.util.InsecureTrustManagerFactory;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.lang.invoke.MethodHandles;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.UnrecoverableKeyException;
import java.security.cert.Certificate;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.Collections;
import java.util.List;
import java.util.stream.Collectors;
import javax.net.ssl.KeyManagerFactory;
import org.onap.ccsdk.oran.a1policymanagementservice.configuration.WebClientConfig;
import org.onap.ccsdk.oran.a1policymanagementservice.configuration.WebClientConfig.HttpProxyConfig;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.util.ResourceUtils;
/**
* Factory for a generic reactive REST client.
*/
public class AsyncRestClientFactory {
private static final Logger logger = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
private final SslContextFactory sslContextFactory;
private final HttpProxyConfig httpProxyConfig;
private final SecurityContext securityContext;
public AsyncRestClientFactory(WebClientConfig clientConfig, SecurityContext securityContext) {
if (clientConfig != null) {
this.sslContextFactory = new CachingSslContextFactory(clientConfig);
this.httpProxyConfig = clientConfig.getHttpProxyConfig();
} else {
logger.warn("No configuration for web client defined, HTTPS will not work");
this.sslContextFactory = null;
this.httpProxyConfig = null;
}
this.securityContext = securityContext;
}
public AsyncRestClient createRestClientNoHttpProxy(String baseUrl) {
return createRestClient(baseUrl, false);
}
public AsyncRestClient createRestClientUseHttpProxy(String baseUrl) {
return createRestClient(baseUrl, true);
}
private AsyncRestClient createRestClient(String baseUrl, boolean useHttpProxy) {
if (this.sslContextFactory != null) {
try {
return new AsyncRestClient(baseUrl, this.sslContextFactory.createSslContext(),
useHttpProxy ? httpProxyConfig : null, this.securityContext);
} catch (Exception e) {
String exceptionString = e.toString();
logger.error("Could not init SSL context, reason: {}", exceptionString);
}
}
return new AsyncRestClient(baseUrl, null, httpProxyConfig, this.securityContext);
}
private class SslContextFactory {
private final WebClientConfig clientConfig;
public SslContextFactory(WebClientConfig clientConfig) {
this.clientConfig = clientConfig;
}
public SslContext createSslContext() throws UnrecoverableKeyException, NoSuchAlgorithmException,
CertificateException, KeyStoreException, IOException {
return this.createSslContext(createKeyManager());
}
private SslContext createSslContext(KeyManagerFactory keyManager)
throws NoSuchAlgorithmException, CertificateException, KeyStoreException, IOException {
if (this.clientConfig.isTrustStoreUsed()) {
return createSslContextRejectingUntrustedPeers(this.clientConfig.getTrustStore(),
this.clientConfig.getTrustStorePassword(), keyManager);
} else {
// Trust anyone
return SslContextBuilder.forClient() //
.keyManager(keyManager) //
.trustManager(InsecureTrustManagerFactory.INSTANCE) //
.build();
}
}
private SslContext createSslContextRejectingUntrustedPeers(String trustStorePath, String trustStorePass,
KeyManagerFactory keyManager)
throws NoSuchAlgorithmException, CertificateException, IOException, KeyStoreException {
final KeyStore trustStore = getTrustStore(trustStorePath, trustStorePass);
List<Certificate> certificateList = Collections.list(trustStore.aliases()).stream() //
.filter(alias -> isCertificateEntry(trustStore, alias)) //
.map(alias -> getCertificate(trustStore, alias)) //
.collect(Collectors.toList());
final X509Certificate[] certificates = certificateList.toArray(new X509Certificate[certificateList.size()]);
return SslContextBuilder.forClient() //
.keyManager(keyManager) //
.trustManager(certificates) //
.build();
}
private boolean isCertificateEntry(KeyStore trustStore, String alias) {
try {
return trustStore.isCertificateEntry(alias);
} catch (KeyStoreException e) {
logger.error("Error reading truststore {}", e.getMessage());
return false;
}
}
private Certificate getCertificate(KeyStore trustStore, String alias) {
try {
return trustStore.getCertificate(alias);
} catch (KeyStoreException e) {
logger.error("Error reading truststore {}", e.getMessage());
return null;
}
}
private KeyManagerFactory createKeyManager() throws NoSuchAlgorithmException, CertificateException, IOException,
UnrecoverableKeyException, KeyStoreException {
final KeyManagerFactory keyManager = KeyManagerFactory.getInstance(KeyManagerFactory.getDefaultAlgorithm());
final KeyStore keyStore = KeyStore.getInstance(this.clientConfig.getKeyStoreType());
final String keyStoreFile = this.clientConfig.getKeyStore();
final String keyStorePassword = this.clientConfig.getKeyStorePassword();
final String keyPassword = this.clientConfig.getKeyPassword();
try (final InputStream inputStream = new FileInputStream(keyStoreFile)) {
keyStore.load(inputStream, keyStorePassword.toCharArray());
}
keyManager.init(keyStore, keyPassword.toCharArray());
return keyManager;
}
private synchronized KeyStore getTrustStore(String trustStorePath, String trustStorePass)
throws NoSuchAlgorithmException, CertificateException, IOException, KeyStoreException {
KeyStore store = KeyStore.getInstance(KeyStore.getDefaultType());
store.load(new FileInputStream(ResourceUtils.getFile(trustStorePath)), trustStorePass.toCharArray());
return store;
}
}
public class CachingSslContextFactory extends SslContextFactory {
private SslContext cachedContext = null;
public CachingSslContextFactory(WebClientConfig clientConfig) {
super(clientConfig);
}
@Override
public SslContext createSslContext() throws UnrecoverableKeyException, NoSuchAlgorithmException,
CertificateException, KeyStoreException, IOException {
if (this.cachedContext == null) {
this.cachedContext = super.createSslContext();
}
return this.cachedContext;
}
}
}
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