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/*******************************************************************************
* Copyright (c) 2009 Wind River Systems, Inc. and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Wind River Systems - initial API and implementation
*******************************************************************************/
package org.eclipse.tm.tcf.ssl;
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.Socket;
import java.security.KeyFactory;
import java.security.Principal;
import java.security.PrivateKey;
import java.security.cert.CertificateException;
import java.security.cert.CertificateFactory;
import java.security.cert.X509Certificate;
import java.security.spec.PKCS8EncodedKeySpec;
import java.util.ArrayList;
import javax.net.ssl.KeyManager;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509ExtendedKeyManager;
import javax.net.ssl.X509TrustManager;
import org.eclipse.tm.tcf.Activator;
import org.eclipse.tm.tcf.core.Base64;
import org.eclipse.tm.tcf.protocol.Protocol;
/**
* This class implements keys and certificates management for secure TCF channels.
*/
public class TCFSecurityManager {
public static File getCertificatesDirectory() {
File certs = Activator.getDefault().getStateLocation().append("certificates").toFile(); //$NON-NLS-1$
if (!certs.exists()) certs.mkdirs();
return certs;
}
public static SSLContext createSSLContext() {
try {
final File certs = getCertificatesDirectory();
if (!certs.exists()) certs.mkdirs();
final CertificateFactory cf = CertificateFactory.getInstance("X.509"); //$NON-NLS-1$
SSLContext context = SSLContext.getInstance("TLS"); //$NON-NLS-1$
X509ExtendedKeyManager km = new X509ExtendedKeyManager() {
public X509Certificate[] getCertificateChain(String alias) {
File f = new File(certs, "Local.cert"); //$NON-NLS-1$
try {
InputStream inp = new BufferedInputStream(new FileInputStream(f));
X509Certificate cert = (X509Certificate)cf.generateCertificate(inp);
inp.close();
return new X509Certificate[] { cert };
}
catch (Exception x) {
Protocol.log("Cannot read certificate: " + f, x); //$NON-NLS-1$
return null;
}
}
public PrivateKey getPrivateKey(String alias) {
File f = new File(certs, "Local.priv"); //$NON-NLS-1$
try {
BufferedReader r = new BufferedReader(new InputStreamReader(new FileInputStream(f), "ASCII")); //$NON-NLS-1$
StringBuffer bf = new StringBuffer();
boolean app = false;
for (;;) {
String s = r.readLine();
if (s == null) new Exception("Invalid format"); //$NON-NLS-1$
else if (s.indexOf("-----BEGIN ") == 0) app = true; //$NON-NLS-1$
else if (s.indexOf("-----END ") == 0) break; //$NON-NLS-1$
else if (app) bf.append(s);
}
r.close();
KeyFactory kf = KeyFactory.getInstance("RSA"); //$NON-NLS-1$
byte[] bytes = Base64.toByteArray(bf.toString().toCharArray());
return kf.generatePrivate(new PKCS8EncodedKeySpec(bytes));
}
catch (Exception x) {
Protocol.log("Cannot read private key: " + f, x); //$NON-NLS-1$
return null;
}
}
public String[] getClientAliases(String keyType, Principal[] issuers) {
return new String[] { "TCF" }; //$NON-NLS-1$
}
public String chooseClientAlias(String[] keyType, Principal[] issuers, Socket socket) {
return "TCF"; //$NON-NLS-1$
}
public String[] getServerAliases(String keyType, Principal[] issuers) {
return new String[] { "TCF" }; //$NON-NLS-1$
}
public String chooseServerAlias(String keyType, Principal[] issuers, Socket socket) {
return "TCF"; //$NON-NLS-1$
}
};
X509TrustManager tm = new X509TrustManager() {
public void checkClientTrusted(X509Certificate[] chain, String auth_type) throws CertificateException {
if ("RSA".equals(auth_type) && chain != null && chain.length == 1) { //$NON-NLS-1$
for (X509Certificate cert : getAcceptedIssuers()) {
if (cert.equals(chain[0])) return;
}
}
throw new CertificateException("Client certificate validation failed"); //$NON-NLS-1$
}
public void checkServerTrusted(X509Certificate[] chain, String auth_type) throws CertificateException {
if ("RSA".equals(auth_type) && chain != null && chain.length == 1) { //$NON-NLS-1$
for (X509Certificate cert : getAcceptedIssuers()) {
if (cert.equals(chain[0])) return;
}
}
throw new CertificateException("Server certificate validation failed"); //$NON-NLS-1$
}
public X509Certificate[] getAcceptedIssuers() {
ArrayList<X509Certificate> list = new ArrayList<X509Certificate>();
for (String fnm : certs.list()) {
if (!fnm.endsWith(".cert")) continue; //$NON-NLS-1$
try {
InputStream inp = new BufferedInputStream(new FileInputStream(new File(certs, fnm)));
X509Certificate cert = (X509Certificate)cf.generateCertificate(inp);
inp.close();
list.add(cert);
}
catch (Throwable x) {
Protocol.log("Cannot load certificate: " + fnm, x); //$NON-NLS-1$
}
}
return list.toArray(new X509Certificate[list.size()]);
}
};
context.init(new KeyManager[] { km }, new TrustManager[] { tm }, null);
return context;
}
catch (Throwable x) {
Protocol.log("Cannot initialize SSL context", x); //$NON-NLS-1$
return null;
}
}
}
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