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/*
* Copyright 2016-2017, Nokia Corporation
*
* 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.
*/
package org.onap.vfc.nfvo.driver.vnfm.svnfm.nokia.vnfm;
import com.google.common.base.Joiner;
import com.google.common.io.BaseEncoding;
import org.apache.http.conn.ssl.DefaultHostnameVerifier;
import org.onap.vfc.nfvo.driver.vnfm.svnfm.nokia.util.StoreLoader;
import org.slf4j.Logger;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;
import javax.net.ssl.*;
import java.nio.charset.StandardCharsets;
import java.security.KeyStore;
import java.security.SecureRandom;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.Set;
import static java.util.UUID.randomUUID;
import static org.onap.vfc.nfvo.driver.vnfm.svnfm.nokia.util.CbamUtils.buildFatalFailure;
import static org.slf4j.LoggerFactory.getLogger;
/**
* Responsible for providing a token to access CBAM APIs
*/
@Component
public class CbamSecurityProvider {
private static Logger logger = getLogger(CbamSecurityProvider.class);
@Value("${trustedCertificates}")
private String trustedCertificates;
@Value("${skipCertificateVerification}")
private boolean skipCertificateVerification;
@Value("${skipHostnameVerification}")
private boolean skipHostnameVerification;
protected HostnameVerifier buildHostnameVerifier() {
if (skipHostnameVerification) {
return (hostname, session) -> true;
} else {
return new DefaultHostnameVerifier();
}
}
protected SSLSocketFactory buildSSLSocketFactory() {
try {
TrustManager[] trustManagers = new X509TrustManager[]{buildTrustManager()};
SSLContext sslContext = SSLContext.getInstance("TLS");
sslContext.init(null, trustManagers, new SecureRandom());
return sslContext.getSocketFactory();
} catch (Exception e) {
throw buildFatalFailure(logger, "Unable to create SSL socket factory", e);
}
}
protected X509TrustManager buildTrustManager() {
if (skipCertificateVerification) {
return new AllTrustedTrustManager();
} else {
if (StringUtils.isEmpty(trustedCertificates)) {
throw buildFatalFailure(logger, "If the skipCertificateVerification is set to false (default) the trustedCertificates can not be empty");
}
Set<String> trustedPems;
String content;
try {
content = new String(BaseEncoding.base64().decode(trustedCertificates), StandardCharsets.UTF_8);
trustedPems = StoreLoader.getCertifacates(content);
} catch (Exception e) {
throw buildFatalFailure(logger, "The trustedCertificates must be a base64 encoded collection of PEM certificates", e);
}
if (trustedPems.isEmpty()) {
throw buildFatalFailure(logger, "No certificate can be extracted from " + content);
}
try {
KeyStore keyStore = StoreLoader.loadStore(Joiner.on("\n").join(trustedPems), randomUUID().toString(), randomUUID().toString());
TrustManagerFactory trustManagerFactory = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
trustManagerFactory.init(keyStore);
return (X509TrustManager) trustManagerFactory.getTrustManagers()[0];
} catch (Exception e) {
throw buildFatalFailure(logger, "Unable to create keystore", e);
}
}
}
private static class AllTrustedTrustManager implements X509TrustManager {
@Override
public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
//no need to check certificates if everything is trusted
}
@Override
public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
//no need to check certificates if everything is trusted
}
@Override
public X509Certificate[] getAcceptedIssuers() {
return new X509Certificate[0];
}
}
}
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