Never been to DZone Snippets before?

Snippets is a public source code repository. Easily build up your personal collection of code snippets, categorize them with tags / keywords, and share them with the world

About this user

Abdennebi http://abdennebi.com

« Newer Snippets
Older Snippets »
Showing 1-2 of 2 total  RSS 

SSL : Download certificate chain from a remote host and add the certificates to a local keystore

// Code from http://blogs.sun.com/andreas/entry/no_more_unable_to_find
// /*
// * Copyright 2006 Sun Microsystems, Inc. All Rights Reserved.
// *
// * Redistribution and use in source and binary forms, with or without
// * modification, are permitted provided that the following conditions
// * are met:
// *
// * - Redistributions of source code must retain the above copyright
// * notice, this list of conditions and the following disclaimer.
// *
// * - Redistributions in binary form must reproduce the above copyright
// * notice, this list of conditions and the following disclaimer in the
// * documentation and/or other materials provided with the distribution.
// *
// * - Neither the name of Sun Microsystems nor the names of its
// * contributors may be used to endorse or promote products derived
// * from this software without specific prior written permission.
// *
// * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
// * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
// * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
// * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// */

   1  
   2  import java.io.*;
   3  import java.net.URL;
   4  
   5  import java.security.*;
   6  import java.security.cert.*;
   7  
   8  import javax.net.ssl.*;
   9  
  10  public class InstallCert {
  11  
  12      public static void main(String[] args) throws Exception {
  13  	String host;
  14  	int port;
  15  	char[] passphrase;
  16  	if ((args.length == 1) || (args.length == 2)) {
  17  	    String[] c = args[0].split(":");
  18  	    host = c[0];
  19  	    port = (c.length == 1) ? 443 : Integer.parseInt(c[1]);
  20  	    String p = (args.length == 1) ? "changeit" : args[1];
  21  	    passphrase = p.toCharArray();
  22  	} else {
  23  	    System.out.println("Usage: java InstallCert <host>[:port] [passphrase]");
  24  	    return;
  25  	}
  26  
  27  	File file = new File("jssecacerts");
  28  	if (file.isFile() == false) {
  29  	    char SEP = File.separatorChar;
  30  	    File dir = new File(System.getProperty("java.home") + SEP
  31  		    + "lib" + SEP + "security");
  32  	    file = new File(dir, "jssecacerts");
  33  	    if (file.isFile() == false) {
  34  		file = new File(dir, "cacerts");
  35  	    }
  36  	}
  37  	System.out.println("Loading KeyStore " + file + "...");
  38  	InputStream in = new FileInputStream(file);
  39  	KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType());
  40  	ks.load(in, passphrase);
  41  	in.close();
  42  
  43  	SSLContext context = SSLContext.getInstance("TLS");
  44  	TrustManagerFactory tmf =
  45  	    TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
  46  	tmf.init(ks);
  47  	X509TrustManager defaultTrustManager = (X509TrustManager)tmf.getTrustManagers()[0];
  48  	SavingTrustManager tm = new SavingTrustManager(defaultTrustManager);
  49  	context.init(null, new TrustManager[] {tm}, null);
  50  	SSLSocketFactory factory = context.getSocketFactory();
  51  
  52  	System.out.println("Opening connection to " + host + ":" + port + "...");
  53  	SSLSocket socket = (SSLSocket)factory.createSocket(host, port);
  54  	socket.setSoTimeout(10000);
  55  	try {
  56  	    System.out.println("Starting SSL handshake...");
  57  	    socket.startHandshake();
  58  	    socket.close();
  59  	    System.out.println();
  60  	    System.out.println("No errors, certificate is already trusted");
  61  	} catch (SSLException e) {
  62  	    System.out.println();
  63  	    e.printStackTrace(System.out);
  64  	}
  65  
  66  	X509Certificate[] chain = tm.chain;
  67  	if (chain == null) {
  68  	    System.out.println("Could not obtain server certificate chain");
  69  	    return;
  70  	}
  71  
  72  	BufferedReader reader =
  73  		new BufferedReader(new InputStreamReader(System.in));
  74  
  75  	System.out.println();
  76  	System.out.println("Server sent " + chain.length + " certificate(s):");
  77  	System.out.println();
  78  	MessageDigest sha1 = MessageDigest.getInstance("SHA1");
  79  	MessageDigest md5 = MessageDigest.getInstance("MD5");
  80  	for (int i = 0; i < chain.length; i++) {
  81  	    X509Certificate cert = chain[i];
  82  	    System.out.println
  83  	    	(" " + (i + 1) + " Subject " + cert.getSubjectDN());
  84  	    System.out.println("   Issuer  " + cert.getIssuerDN());
  85  	    sha1.update(cert.getEncoded());
  86  	    System.out.println("   sha1    " + toHexString(sha1.digest()));
  87  	    md5.update(cert.getEncoded());
  88  	    System.out.println("   md5     " + toHexString(md5.digest()));
  89  	    System.out.println();
  90  	}
  91  
  92  	System.out.println("Enter certificate to add to trusted keystore or 'q' to quit: [1]");
  93  	String line = reader.readLine().trim();
  94  	int k;
  95  	try {
  96  	    k = (line.length() == 0) ? 0 : Integer.parseInt(line) - 1;
  97  	} catch (NumberFormatException e) {
  98  	    System.out.println("KeyStore not changed");
  99  	    return;
 100  	}
 101  
 102  	X509Certificate cert = chain[k];
 103  	String alias = host + "-" + (k + 1);
 104  	ks.setCertificateEntry(alias, cert);
 105  
 106  	OutputStream out = new FileOutputStream("jssecacerts");
 107  	ks.store(out, passphrase);
 108  	out.close();
 109  
 110  	System.out.println();
 111  	System.out.println(cert);
 112  	System.out.println();
 113  	System.out.println
 114  		("Added certificate to keystore 'jssecacerts' using alias '"
 115  		+ alias + "'");
 116      }
 117  
 118      private static final char[] HEXDIGITS = "0123456789abcdef".toCharArray();
 119  
 120      private static String toHexString(byte[] bytes) {
 121  	StringBuilder sb = new StringBuilder(bytes.length * 3);
 122  	for (int b : bytes) {
 123  	    b &= 0xff;
 124  	    sb.append(HEXDIGITS[b >> 4]);
 125  	    sb.append(HEXDIGITS[b & 15]);
 126  	    sb.append(' ');
 127  	}
 128  	return sb.toString();
 129      }
 130  
 131      private static class SavingTrustManager implements X509TrustManager {
 132  
 133  	private final X509TrustManager tm;
 134  	private X509Certificate[] chain;
 135  
 136  	SavingTrustManager(X509TrustManager tm) {
 137  	    this.tm = tm;
 138  	}
 139  
 140  	public X509Certificate[] getAcceptedIssuers() {
 141  	    throw new UnsupportedOperationException();
 142  	}
 143  
 144  	public void checkClientTrusted(X509Certificate[] chain, String authType)
 145  		throws CertificateException {
 146  	    throw new UnsupportedOperationException();
 147  	}
 148  
 149  	public void checkServerTrusted(X509Certificate[] chain, String authType)
 150  		throws CertificateException {
 151  	    this.chain = chain;
 152  	    tm.checkServerTrusted(chain, authType);
 153  	}
 154      }
 155  
 156  }
to ssl certificate by Abdennebi on Nov 05, 2007

Afficher les propriétés du système

// Affiche les propriétés du système

   1  
   2  package test;
   3  
   4  import java.util.ArrayList;
   5  import java.util.Enumeration;
   6  import java.util.List;
   7  import java.util.NoSuchElementException;
   8  import java.util.Properties;
   9  public class Proprietes {
  10  	public static void main(String[] args) {
  11  		
  12  		Properties proprietes = System.getProperties();
  13  		
  14  		Enumeration<String> noms = (Enumeration<String>)proprietes.propertyNames();
  15  		
  16  		List<String> tabObj = new ArrayList<String>();
  17  		
  18  		String nom;
  19  		
  20  		while((nom = getElements(noms)) != null){			
  21  			
  22  			tabObj.add(nom);
  23  			
  24  		}
  25  		
  26  		for(int i = 0; i < tabObj.size(); i++){
  27  			
  28  			System.out.println (tabObj.get(i)
  29  					+ " : " + proprietes.getProperty(tabObj.get(i)));
  30  			
  31  		}
  32  	}
  33  
  34  	public static String getElements(Enumeration<String> enumeration){
  35  		try{
  36  			return enumeration.nextElement();
  37  		}
  38  		catch(NoSuchElementException e){
  39  			return null;
  40  		}
  41  	}
  42  }
  43
to java by Abdennebi on Oct 30, 2007
« Newer Snippets
Older Snippets »
Showing 1-2 of 2 total  RSS