org.jboss.security.ExternalPasswordCache Maven / Gradle / Ivy
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/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt 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.security;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
/**
* External command password cache.
* Singleton password cache.
*
* @author Peter Skopek
* @version $Revision:$
*/
public class ExternalPasswordCache implements PasswordCache {
private static final ExternalPasswordCache PASSWORD_CACHE = new ExternalPasswordCache();
private Map cache;
private MessageDigest md5Digest = null;
private ExternalPasswordCache() {
cache = Collections.synchronizedMap(new HashMap());
try {
md5Digest = MessageDigest.getInstance("MD5");
}
catch (NoSuchAlgorithmException e) {
// Cannot get MD5 algorithm instance for hashing password commands. Using NULL.
PicketBoxLogger.LOGGER.errorCannotGetMD5AlgorithmInstance();
}
}
public static ExternalPasswordCache getExternalPasswordCacheInstance() {
SecurityManager sm = System.getSecurityManager();
if (sm != null) {
sm.checkPermission(new RuntimePermission(ExternalPasswordCache.class.getName() + ".getExternalPasswordCacheInstance"));
}
return PASSWORD_CACHE;
}
/* (non-Javadoc)
* @see org.jboss.security.PasswordCache#contains(java.lang.String)
*/
@Override
public boolean contains(String key, long timeOut) {
String transformedKey = transformKey(key);
PasswordRecord pr = cache.get(transformedKey);
if (pr != null && (timeOut == 0 || System.currentTimeMillis() - pr.timeOut < timeOut)) {
return true;
}
return false;
}
/* (non-Javadoc)
* @see org.jboss.security.PasswordCache#getPassword(java.lang.String)
*/
@Override
public char[] getPassword(String key) {
String newKey = transformKey(key);
PicketBoxLogger.LOGGER.traceRetrievingPasswordFromCache(newKey);
PasswordRecord pr = cache.get(newKey);
return pr.password;
}
/* (non-Javadoc)
* @see org.jboss.security.PasswordCache#storePassword(java.lang.String, char[])
*/
@Override
public void storePassword(String key, char[] password) {
String newKey = transformKey(key);
PicketBoxLogger.LOGGER.traceStoringPasswordToCache(newKey);
PasswordRecord pr = new PasswordRecord();
pr.timeOut = System.currentTimeMillis();
pr.password = password;
cache.put(newKey, pr);
}
private String transformKey(String key) {
String newKey = key;
if (md5Digest != null) {
md5Digest.reset();
byte[] bt = key.getBytes();
byte[] md5 = md5Digest.digest(bt);
newKey = new String(Base64Utils.tob64(md5));
}
return newKey;
}
/**
* Get number of cached passwords.
* Mainly for testing purpose.
*/
public int getCachedPasswordsCount() {
return cache.size();
}
/* (non-Javadoc)
* @see org.jboss.security.PasswordCache#reset()
*/
@Override
public void reset() {
PicketBoxLogger.LOGGER.traceResettingCache();
cache.clear();
}
}
class PasswordRecord {
long timeOut;
char[] password;
}