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*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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
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* http://www.apache.org/licenses/LICENSE-2.0
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* 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.
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* information on the Apache Software Foundation, please see
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package org.ovirt.engine.core.utils.ssl;
import java.io.IOException;
import java.io.InputStream;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.SocketAddress;
import java.net.URL;
import java.net.UnknownHostException;
import java.security.GeneralSecurityException;
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.Enumeration;
import javax.net.SocketFactory;
import javax.net.ssl.KeyManager;
import javax.net.ssl.KeyManagerFactory;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocket;
import javax.net.ssl.TrustManager;
import javax.net.ssl.TrustManagerFactory;
import javax.net.ssl.X509TrustManager;
import org.apache.commons.httpclient.ConnectTimeoutException;
import org.apache.commons.httpclient.params.HttpConnectionParams;
import org.apache.commons.httpclient.protocol.SecureProtocolSocketFactory;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* <p>
* AuthSSLProtocolSocketFactory can be used to validate the identity of the HTTPS server against a list of trusted
* certificates and to authenticate to the HTTPS server using a private key.
* </p>
*
* <p>
* AuthSSLProtocolSocketFactory will enable server authentication when supplied with a {@link KeyStore truststore} file
* containg one or several trusted certificates. The client secure socket will reject the connection during the SSL
* session handshake if the target HTTPS server attempts to authenticate itself with a non-trusted certificate.
* </p>
*
* <p>
* Use JDK keytool utility to import a trusted certificate and generate a truststore file:
*
* <pre>
* keytool -import -alias "my server cert" -file server.crt -keystore my.truststore
* </pre>
*
* </p>
*
* <p>
* AuthSSLProtocolSocketFactory will enable client authentication when supplied with a {@link KeyStore keystore} file
* containg a private key/public certificate pair. The client secure socket will use the private key to authenticate
* itself to the target HTTPS server during the SSL session handshake if requested to do so by the server. The target
* HTTPS server will in its turn verify the certificate presented by the client in order to establish client's
* authenticity
* </p>
*
* <p>
* Use the following sequence of actions to generate a keystore file
* </p>
* <ul>
* <li>
* <p>
* Use JDK keytool utility to generate a new key
*
* <pre>
* keytool -genkey -v -alias "my client key" -validity 365 -keystore my.keystore
* </pre>
*
* For simplicity use the same password for the key as that of the keystore
* </p>
* </li>
* <li>
* <p>
* Issue a certificate signing request (CSR)
*
* <pre>
* keytool -certreq -alias "my client key" -file mycertreq.csr -keystore my.keystore
* </pre>
*
* </p>
* </li>
* <li>
* <p>
* Send the certificate request to the trusted Certificate Authority for signature. One may choose to act as her own CA
* and sign the certificate request using a PKI tool, such as OpenSSL.
* </p>
* </li>
* <li>
* <p>
* Import the trusted CA root certificate
*
* <pre>
* keytool -import -alias "my trusted ca" -file caroot.crt -keystore my.keystore
* </pre>
*
* </p>
* </li>
* <li>
* <p>
* Import the PKCS#7 file containg the complete certificate chain
*
* <pre>
* keytool -import -alias "my client key" -file mycert.p7 -keystore my.keystore
* </pre>
*
* </p>
* </li>
* <li>
* <p>
* Verify the content the resultant keystore file
*
* <pre>
* keytool -list -v -keystore my.keystore
* </pre>
*
* </p>
* </li>
* </ul>
* <p>
* Example of using custom protocol socket factory for a specific host:
*
* <pre>
* Protocol authhttps = new Protocol("https", new AuthSSLProtocolSocketFactory(new URL("file:my.keystore"), "NoSoup4Uword",
* new URL("file:my.truststore"), "NoSoup4Uword"), 443);
*
* HttpClient client = new HttpClient();
* client.getHostConfiguration().setHost("localhost", 443, authhttps);
* // use relative url only
* GetMethod httpget = new GetMethod("/");
* client.executeMethod(httpget);
* </pre>
*
* </p>
* <p>
* Example of using custom protocol socket factory per default instead of the standard one:
*
* <pre>
* Protocol authhttps = new Protocol("https", new AuthSSLProtocolSocketFactory(new URL("file:my.keystore"), "NoSoup4Uword",
* new URL("file:my.truststore"), "NoSoup4Uword"), 443);
* Protocol.registerProtocol("https", authhttps);
*
* HttpClient client = new HttpClient();
* GetMethod httpget = new GetMethod("https://localhost/");
* client.executeMethod(httpget);
* </pre>
*
* </p>
*
*
* <p>
* DISCLAIMER: HttpClient developers DO NOT actively support this component. The component is provided as a reference
* material, which may be inappropriate for use without additional customization.
* </p>
*/
public class AuthSSLProtocolSocketFactory implements SecureProtocolSocketFactory {
/** Log object for this class. */
private static final Log LOG = LogFactory.getLog(AuthSSLProtocolSocketFactory.class);
private final URL keystoreUrl;
private final String keystorePassword;
private final URL truststoreUrl;
private final String truststorePassword;
private final SSLContext sslcontext;
/**
* Constructor for AuthSSLProtocolSocketFactory. Either a keystore or truststore file must be given. Otherwise SSL
* context initialization error will result.
*
* @param keystoreUrl
* URL of the keystore file. May be <tt>null</tt> if HTTPS client authentication is not to be used.
* @param keystorePassword
* Password to unlock the keystore. IMPORTANT: this implementation assumes that the same password is used
* to protect the key and the keystore itself.
* @param truststoreUrl
* URL of the truststore file. May be <tt>null</tt> if HTTPS server authentication is not to be used.
* @param truststorePassword
* Password to unlock the truststore.
*/
public AuthSSLProtocolSocketFactory(final URL keystoreUrl, final String keystorePassword, final URL truststoreUrl,
final String truststorePassword) {
super();
this.keystoreUrl = keystoreUrl;
this.keystorePassword = keystorePassword;
this.truststoreUrl = truststoreUrl;
this.truststorePassword = truststorePassword;
this.sslcontext = createSSLContext();
}
private static KeyStore createKeyStore(final URL url, final String password) throws KeyStoreException,
NoSuchAlgorithmException, CertificateException, IOException {
if (url == null) {
throw new IllegalArgumentException("Keystore url may not be null");
}
LOG.debug("Initializing key store");
KeyStore keystore = KeyStore.getInstance("jks");
InputStream is = null;
try {
is = url.openStream();
keystore.load(is, password != null ? password.toCharArray() : null);
} finally {
if (is != null)
is.close();
}
return keystore;
}
private static KeyManager[] createKeyManagers(final KeyStore keystore, final String password)
throws KeyStoreException, NoSuchAlgorithmException, UnrecoverableKeyException {
if (keystore == null) {
throw new IllegalArgumentException("Keystore may not be null");
}
LOG.debug("Initializing key manager");
KeyManagerFactory kmfactory = KeyManagerFactory.getInstance(KeyManagerFactory.getDefaultAlgorithm());
kmfactory.init(keystore, password != null ? password.toCharArray() : null);
return kmfactory.getKeyManagers();
}
private static TrustManager[] createTrustManagers(final KeyStore keystore) throws KeyStoreException,
NoSuchAlgorithmException {
if (keystore == null) {
throw new IllegalArgumentException("Keystore may not be null");
}
LOG.debug("Initializing trust manager");
TrustManagerFactory tmfactory = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
tmfactory.init(keystore);
TrustManager[] trustmanagers = tmfactory.getTrustManagers();
for (int i = 0; i < trustmanagers.length; i++) {
if (trustmanagers[i] instanceof X509TrustManager) {
trustmanagers[i] = new AuthSSLX509TrustManager((X509TrustManager) trustmanagers[i]);
}
}
return trustmanagers;
}
private SSLContext createSSLContext() {
try {
KeyManager[] keymanagers = null;
TrustManager[] trustmanagers = null;
if (this.keystoreUrl != null) {
KeyStore keystore = createKeyStore(this.keystoreUrl, this.keystorePassword);
if (LOG.isDebugEnabled()) {
Enumeration<String> aliases = keystore.aliases();
while (aliases.hasMoreElements()) {
String alias = aliases.nextElement();
Certificate[] certs = keystore.getCertificateChain(alias);
if (certs != null) {
LOG.debug("Certificate chain '" + alias + "':");
for (int c = 0; c < certs.length; c++) {
if (certs[c] instanceof X509Certificate) {
X509Certificate cert = (X509Certificate) certs[c];
LOG.debug(" Certificate " + (c + 1) + ":");
LOG.debug(" Subject DN: " + cert.getSubjectDN());
LOG.debug(" Signature Algorithm: " + cert.getSigAlgName());
LOG.debug(" Valid from: " + cert.getNotBefore());
LOG.debug(" Valid until: " + cert.getNotAfter());
LOG.debug(" Issuer: " + cert.getIssuerDN());
}
}
}
}
}
keymanagers = createKeyManagers(keystore, this.keystorePassword);
}
if (this.truststoreUrl != null) {
KeyStore keystore = createKeyStore(this.truststoreUrl, this.truststorePassword);
if (LOG.isDebugEnabled()) {
Enumeration<String> aliases = keystore.aliases();
while (aliases.hasMoreElements()) {
String alias = aliases.nextElement();
LOG.debug("Trusted certificate '" + alias + "':");
Certificate trustedcert = keystore.getCertificate(alias);
if (trustedcert != null && trustedcert instanceof X509Certificate) {
X509Certificate cert = (X509Certificate) trustedcert;
LOG.debug(" Subject DN: " + cert.getSubjectDN());
LOG.debug(" Signature Algorithm: " + cert.getSigAlgName());
LOG.debug(" Valid from: " + cert.getNotBefore());
LOG.debug(" Valid until: " + cert.getNotAfter());
LOG.debug(" Issuer: " + cert.getIssuerDN());
}
}
}
trustmanagers = createTrustManagers(keystore);
}
SSLContext sslcontext = SSLContext.getInstance("SSLv3");
sslcontext.init(keymanagers, trustmanagers, null);
return sslcontext;
} catch (NoSuchAlgorithmException e) {
LOG.error(e.getMessage(), e);
throw new AuthSSLInitializationException("Unsupported algorithm exception: " + e.getMessage());
} catch (KeyStoreException e) {
LOG.error(e.getMessage(), e);
throw new AuthSSLInitializationException("Keystore exception: " + e.getMessage());
} catch (GeneralSecurityException e) {
LOG.error(e.getMessage(), e);
throw new AuthSSLInitializationException("Key management exception: " + e.getMessage());
} catch (IOException e) {
LOG.error(e.getMessage(), e);
throw new AuthSSLInitializationException("I/O error reading keystore/truststore file: " + e.getMessage());
}
}
/**
* Attempts to get a new socket connection to the given host within the given time limit.
* <p>
* To circumvent the limitations of older JREs that do not support connect timeout a controller thread is executed.
* The controller thread attempts to create a new socket within the given limit of time. If socket constructor does
* not return until the timeout expires, the controller terminates and throws an {@link ConnectTimeoutException}
* </p>
*
* @param host
* the host name/IP
* @param port
* the port on the host
* @param clientHost
* the local host name/IP to bind the socket to
* @param clientPort
* the port on the local machine
* @param params
* {@link HttpConnectionParams Http connection parameters}
*
* @return Socket a new socket
*
* @throws IOException
* if an I/O error occurs while creating the socket
* @throws UnknownHostException
* if the IP address of the host cannot be determined
*/
public Socket createSocket(final String host, final int port, final InetAddress localAddress, final int localPort,
final HttpConnectionParams params) throws IOException, UnknownHostException, ConnectTimeoutException {
if (params == null) {
throw new IllegalArgumentException("Parameters may not be null");
}
int timeout = params.getConnectionTimeout();
SocketFactory socketfactory = sslcontext.getSocketFactory();
if (timeout == 0) {
SSLSocket socket = (SSLSocket) socketfactory.createSocket(host, port, localAddress, localPort);
socket.setEnabledProtocols(new String[] { "SSLv3" });
return socket;
} else {
SSLSocket socket = (SSLSocket) socketfactory.createSocket();
SocketAddress localaddr = new InetSocketAddress(localAddress, localPort);
SocketAddress remoteaddr = new InetSocketAddress(host, port);
socket.bind(localaddr);
socket.connect(remoteaddr, timeout);
socket.setEnabledProtocols(new String[] { "SSLv3" });
return socket;
}
}
/**
* @see SecureProtocolSocketFactory#createSocket(java.lang.String,int,java.net.InetAddress,int)
*/
public Socket createSocket(String host, int port, InetAddress clientHost, int clientPort) throws IOException,
UnknownHostException {
SSLSocket socket = (SSLSocket) sslcontext.getSocketFactory().createSocket(host, port, clientHost,
clientPort);
socket.setEnabledProtocols(new String[] { "SSLv3" });
return socket;
}
/**
* @see SecureProtocolSocketFactory#createSocket(java.lang.String,int)
*/
public Socket createSocket(String host, int port) throws IOException, UnknownHostException {
SSLSocket socket = (SSLSocket) sslcontext.getSocketFactory().createSocket(host, port);
socket.setEnabledProtocols(new String[] { "SSLv3" });
return socket;
}
/**
* @see SecureProtocolSocketFactory#createSocket(java.net.Socket,java.lang.String,int,boolean)
*/
public Socket createSocket(Socket socket, String host, int port, boolean autoClose) throws IOException,
UnknownHostException {
SSLSocket sslSocket = (SSLSocket) sslcontext.getSocketFactory()
.createSocket(socket, host, port, autoClose);
sslSocket.setEnabledProtocols(new String[] { "SSLv3" });
return sslSocket;
}
}