/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.identity.federation.core.util;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.security.GeneralSecurityException;
import java.security.Key;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.cert.Certificate;
/**
* Utility to handle Java Keystore
* @author Anil.Saldhana@redhat.com
* @since Jan 12, 2009
*/
public class KeyStoreUtil
{
/**
* Get the KeyStore
* @param keyStoreFile
* @param storePass
* @return
* @throws GeneralSecurityException
* @throws IOException
*/
public static KeyStore getKeyStore(File keyStoreFile, char[] storePass) throws GeneralSecurityException, IOException
{
FileInputStream fis = new FileInputStream(keyStoreFile);
return getKeyStore(fis,storePass);
}
/**
* Get the Keystore given the url to the keystore file as a string
* @param fileURL
* @param storePass
* @return
* @throws GeneralSecurityException
* @throws IOException
*/
public static KeyStore getKeyStore(String fileURL, char[] storePass) throws GeneralSecurityException, IOException
{
if(fileURL == null)
throw new IllegalArgumentException("fileURL is null");
File file = new File(fileURL);
FileInputStream fis = new FileInputStream(file);
return getKeyStore(fis,storePass);
}
/**
* Get the Keystore given the URL to the keystore
* @param url
* @param storePass
* @return
* @throws GeneralSecurityException
* @throws IOException
*/
public static KeyStore getKeyStore(URL url, char[] storePass) throws GeneralSecurityException, IOException
{
if(url == null)
throw new IllegalArgumentException("url is null");
return getKeyStore(url.openStream(), storePass);
}
/**
* Get the Key Store
* <b>Note:</b> This method wants the InputStream to be not null.
* @param ksStream
* @param storePass
* @return
* @throws GeneralSecurityException
* @throws IOException
* @throws IllegalArgumentException if ksStream is null
*/
public static KeyStore getKeyStore(InputStream ksStream, char[] storePass) throws GeneralSecurityException, IOException
{
if(ksStream == null)
throw new IllegalArgumentException("InputStream for the KeyStore is null");
KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType());
ks.load(ksStream, storePass);
return ks;
}
/**
* Generate a Key Pair
* @param algo (RSA, DSA etc)
* @return
* @throws GeneralSecurityException
*/
public static KeyPair generateKeyPair(String algo) throws GeneralSecurityException
{
KeyPairGenerator kpg = KeyPairGenerator.getInstance(algo);
return kpg.genKeyPair();
}
/**
* Get the Public Key from the keystore
* @param ks
* @param alias
* @param password
* @return
* @throws GeneralSecurityException
*/
public static PublicKey getPublicKey(KeyStore ks, String alias, char[] password) throws KeyStoreException, NoSuchAlgorithmException, GeneralSecurityException
{
PublicKey publicKey = null;
// Get private key
Key key = ks.getKey(alias, password);
if (key instanceof PrivateKey)
{
// Get certificate of public key
Certificate cert = ks.getCertificate(alias);
// Get public key
publicKey = cert.getPublicKey();
}
// if alias is a certificate alias, get the public key from the certificate.
if(publicKey == null)
{
Certificate cert = ks.getCertificate(alias);
if(cert != null)
publicKey = cert.getPublicKey();
}
return publicKey;
}
/**
* Add a certificate to the KeyStore
* @param keystoreFile
* @param storePass
* @param alias
* @param cert
* @throws GeneralSecurityException
* @throws IOException
*/
public static void addCertificate(File keystoreFile, char[] storePass, String alias, Certificate cert)
throws GeneralSecurityException, IOException
{
KeyStore keystore = getKeyStore(keystoreFile, storePass);
// Add the certificate
keystore.setCertificateEntry(alias, cert);
// Save the new keystore contents
FileOutputStream out = new FileOutputStream(keystoreFile);
keystore.store(out, storePass);
out.close();
}
}