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/*-
* ============LICENSE_START=======================================================
* SDC
* ================================================================================
* Copyright (C) 2017 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.workflow.web;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Enumeration;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.eclipse.jetty.client.HttpClient;
import org.eclipse.jetty.client.api.Request;
import org.eclipse.jetty.client.dynamic.HttpClientTransportDynamic;
import org.eclipse.jetty.http.HttpFields;
import org.eclipse.jetty.http.HttpHeader;
import org.eclipse.jetty.http.HttpScheme;
import org.eclipse.jetty.io.ClientConnector;
import org.eclipse.jetty.proxy.ProxyServlet;
import org.eclipse.jetty.util.URIUtil;
import org.eclipse.jetty.util.ssl.SslContextFactory;
/***
* Class that provides the proxy implementation for both secured and unsecured backend connections.
*
* The following nevironment value is mandatory:
* proxyTo - the full URL to the backend server (including protocol and context path if relevant)
*
* In case of a secured connection (proxyTo starting with https) the following may be set:
* sslTrustAll - set to true if all secure connection are accepted
* maxPoolConnections - number of connection in the pool, only when overriding the jetty default
*
* In case of SSL and nto trusting all certificates:
* keystorePath - path to the keystore
* keystoreType - type of the keystore
* keystorePassword - keystore password
*
* truststorePath - path to the truststore
* truststoreType - type of the truststore
* truststorePassword - truststore password
*/
public class SSLProxyServlet extends ProxyServlet {
public static final int TIMEOUT = 600000;
protected static final String PROXY_TO = "proxyTo";
protected static final String TRUST_ALL = "sslTrustAll";
protected static final String MAX_POOL_CONNECTIONS = "maxPoolConnections";
protected static final String KEYSTORE_PATH = "keystorePath";
protected static final String KEYSTORE_TYPE = "keystoreType";
protected static final String KEYSTORE_P = "keystorePassword";
protected static final String KEYMANAGER_P = "keyManagerPassword";
protected static final String KEYSTORE_CYPHER = "keystoreCypher";
protected static final String TRUSTSTORE_PATH = "truststorePath";
protected static final String TRUSTSTORE_TYPE = "truststoreType";
protected static final String TRUSTSTORE_P = "truststorePassword";
protected static final String ENDPOINT_IDENTIFICATION_ALGORITHM = "endpointIdentificationAlgorithm";
private static final long serialVersionUID = 1L;
private static URL proxyUrl = null;
private static void setProxyUrl(URL proxy) {
SSLProxyServlet.proxyUrl = proxy;
}
private void initProxyUrl() throws ServletException, MalformedURLException {
if (SSLProxyServlet.proxyUrl != null) {
return;
}
String proxyUrlStr = System.getProperty(PROXY_TO);
if (proxyUrlStr == null) {
throw new ServletException("-D" + PROXY_TO + " must be specified");
}
setProxyUrl(new URL(proxyUrlStr));
}
@Override
public void init() throws ServletException {
super.init();
try {
initProxyUrl();
} catch (MalformedURLException e) {
throw new ServletException(e);
}
}
@Override
public void sendProxyRequest(HttpServletRequest request, HttpServletResponse response, Request proxyRequest) {
@SuppressWarnings("unchecked")
Enumeration<String> headerNames = request.getHeaderNames();
while (headerNames.hasMoreElements()) {
String headerName = headerNames.nextElement();
if (!proxyRequest.getHeaders().contains(headerName)) {
String headerVal = request.getHeader(headerName);
proxyRequest.header(headerName, headerVal);
}
}
((HttpFields.Mutable) proxyRequest.getHeaders()).remove(HttpHeader.HOST);
super.sendProxyRequest(request, response, proxyRequest);
}
@Override
protected HttpClient newHttpClient() {
// ioverride parent method to be able to create a secured client as well.
boolean isSecureClient = (
proxyUrl.getProtocol() != null &&
proxyUrl.getProtocol().equalsIgnoreCase(HttpScheme.HTTPS.toString()));
if ((isSecureClient)) {
String trustAll = System.getProperty(TRUST_ALL);
SslContextFactory.Client sslContextFactory = null;
if (trustAll != null && Boolean.parseBoolean(trustAll) == Boolean.TRUE) {
sslContextFactory = new SslContextFactory.Client(true);
} else {
sslContextFactory = new SslContextFactory.Client(false);
// setting up truststore
sslContextFactory.setTrustStorePath(System.getProperty(TRUSTSTORE_PATH));
sslContextFactory.setTrustStorePassword(System.getProperty(TRUSTSTORE_P));
sslContextFactory.setTrustStoreType(System.getProperty(TRUSTSTORE_TYPE));
// setting up keystore
sslContextFactory.setKeyStorePath(System.getProperty(KEYSTORE_PATH));
sslContextFactory.setKeyStorePassword(System.getProperty(KEYSTORE_P));
sslContextFactory.setKeyStoreType(System.getProperty(KEYSTORE_TYPE));
sslContextFactory.setKeyManagerPassword(System.getProperty(KEYMANAGER_P));
if (System.getProperty(ENDPOINT_IDENTIFICATION_ALGORITHM) != null &&
!System.getProperty(ENDPOINT_IDENTIFICATION_ALGORITHM).equals("")) {
sslContextFactory
.setEndpointIdentificationAlgorithm(System.getProperty(ENDPOINT_IDENTIFICATION_ALGORITHM));
}
if (System.getProperty(KEYSTORE_CYPHER) != null &&
!System.getProperty(KEYSTORE_CYPHER).equals("")) {
sslContextFactory.setIncludeCipherSuites(System.getProperty(KEYSTORE_CYPHER));
}
}
ClientConnector clientConnector = new ClientConnector();
clientConnector.setSslContextFactory(sslContextFactory);
return new HttpClient(new HttpClientTransportDynamic(clientConnector));
} else {
return super.newHttpClient();
}
}
@Override
protected HttpClient createHttpClient() throws ServletException {
try {
initProxyUrl();
} catch (MalformedURLException e) {
throw new ServletException(e);
}
// calling the parent and setting the configuration for our implementation
HttpClient client = super.createHttpClient();
setTimeout(TIMEOUT);
client.setIdleTimeout(TIMEOUT);
if (System.getProperty(MAX_POOL_CONNECTIONS) != null) {
client.setMaxConnectionsPerDestination(
Integer.valueOf(System.getProperty(MAX_POOL_CONNECTIONS)));
}
return client;
}
@Override
protected String rewriteTarget(HttpServletRequest request) {
String path = proxyUrl.getPath();
if (request.getServletPath() != null) {
path += request.getServletPath();
}
if (request.getPathInfo() != null) {
path += request.getPathInfo();
}
return URIUtil.newURI(
proxyUrl.getProtocol(),
proxyUrl.getHost(),
proxyUrl.getPort(),
path,
request.getQueryString());
}
}
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