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diff --git a/libjava/classpath/gnu/javax/security/auth/login/GnuConfiguration.java b/libjava/classpath/gnu/javax/security/auth/login/GnuConfiguration.java
new file mode 100644
index 000000000..20d8f3afd
--- /dev/null
+++ b/libjava/classpath/gnu/javax/security/auth/login/GnuConfiguration.java
@@ -0,0 +1,466 @@
+/* GnuConfiguration.java -- GNU Classpath implementation of JAAS Configuration
+   Copyright (C) 2006 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath 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
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package gnu.javax.security.auth.login;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.security.Security;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.logging.Logger;
+
+import javax.security.auth.AuthPermission;
+import javax.security.auth.login.AppConfigurationEntry;
+import javax.security.auth.login.Configuration;
+
+/**
+ * An implementation of the {@link Configuration} class which interprets JAAS
+ * Login Configuration files written in the <i>default</i> syntax described in
+ * the publicly available documentation of that class. A more formal definition
+ * of this syntax is as follows:
+ *
+ * <pre>
+ *   CONFIG              ::= APP_OR_OTHER_ENTRY+
+ *   APP_OR_OTHER_ENTRY  ::= APP_NAME_OR_OTHER JAAS_CONFIG_BLOCK
+ *   APP_NAME_OR_OTHER   ::= APP_NAME
+ *                         | 'other'
+ *   JAAS_CONFIG_BLOCK   ::= '{' (LOGIN_MODULE_ENTRY ';')+ '}' ';'
+ *   LOGIN_MODULE_ENTRY  ::= MODULE_CLASS FLAG MODULE_OPTION* ';'
+ *   FLAG                ::= 'required'
+ *                         | 'requisite'
+ *                         | 'sufficient'
+ *                         | 'optional'
+ *   MODULE_OPTION       ::= PARAM_NAME '=' PARAM_VALUE
+ *
+ *   APP_NAME     ::= JAVA_IDENTIFIER
+ *   MODULE_CLASS ::= JAVA_IDENTIFIER ('.' JAVA_IDENTIFIER)*
+ *   PARAM_NAME   ::= STRING
+ *   PARAM_VALUE  ::= '"' STRING '"' | ''' STRING ''' | STRING
+ * </pre>
+ *
+ * <p>This implementation will specifically attempt to process one or more
+ * Login Configuration files in the following locations, and when found parse
+ * them and merge their contents. The locations, and the order in which they are
+ * investigated, follows:</p>
+ *
+ * <ol>
+ *   <li>If the following Security properties:
+ *   <i>java.security.auth.login.config.url.<b>N</b></i>, where <i><b>N</b></i>
+ *   is a digit, from <code>1</code> to an arbitrary number, are defined, then
+ *   the value of each of those properties will be considered as a JAAS Login
+ *   Configuration file written in the default syntax. This implementation will
+ *   attempt parsing all such files.
+ *
+ *   <p>It is worth noting the following:
+ *     <ul>
+ *       <li>The GNU Classpath security file, named <i>classpath.security</i>,
+ *       where all Security properties are encoded, is usually located in
+ *       <i>/usr/local/classpath/lib/security</i> folder.</li>
+ *
+ *       <li>The numbers used in the properties
+ *       <i>java.security.auth.login.config.url.<b>N</b></i> MUST be sequential,
+ *       with no breaks in-between.</li>
+ *     </ul>
+ *   </p>
+ *
+ *   <p>If at least one of the designated Configuration files was found, and
+ *   was parsed correctly, then no other location will be inspected.</p></li>
+ *
+ *   <li>If the System property named <i>java.security.auth.login.config</i>
+ *   is not null or empty, its contents are then interpreted as a URL to a
+ *   JAAS Login Configuration file written in the default syntax.
+ *
+ *   <p>If this System property is defined, and the file it refers to was
+ *   parsed correctly, then no other location will be inspected.</p></li>
+ *
+ *   <li>If a file named <i>.java.login.config</i> or <i>java.login.config</i>
+ *   (in that order) is found in the location referenced by the value of the
+ *   System property <i>user.home</i>, then that file is parsed as a JAAS Login
+ *   Configuration written in the default syntax.</li>
+ *
+ *   <li>If none of the above resulted in a correctly parsed JAAS Login
+ *   Configuration file, then this implementation will install a <i>Null
+ *   Configuration</i> which basically does not recognize any Application.</li>
+ * </ol>
+ */
+public final class GnuConfiguration extends Configuration
+{
+  private static final Logger log = Logger.getLogger(GnuConfiguration.class.getName());
+  /**
+   * The internal map of login modules keyed by application name. Each entry in
+   * this map is a {@link List} of {@link AppConfigurationEntry}s for that
+   * application name.
+   */
+  private Map loginModulesMap;
+  /** Our reference to our default syntax parser. */
+  private ConfigFileParser cp;
+
+  // Constructor(s)
+  // --------------------------------------------------------------------------
+
+  /** Trivial 0-arguments Constructor. */
+  public GnuConfiguration()
+  {
+    super();
+
+    loginModulesMap = new HashMap();
+    cp = new ConfigFileParser();
+    init();
+  }
+
+  // Class methods
+  // --------------------------------------------------------------------------
+
+  // Instance methods
+  // --------------------------------------------------------------------------
+
+  // Configuration abstract methods implementation ----------------------------
+
+  /* (non-Javadoc)
+   * @see javax.security.auth.login.Configuration#getAppConfigurationEntry(java.lang.String)
+   */
+  public AppConfigurationEntry[] getAppConfigurationEntry(String appName)
+  {
+    if (appName == null)
+      return null;
+
+    appName = appName.trim();
+    if (appName.length() == 0)
+      return null;
+
+    List loginModules = (List) loginModulesMap.get(appName);
+    if (loginModules == null || loginModules.size() == 0)
+      return null;
+
+    if (gnu.java.security.Configuration.DEBUG)
+      log.fine(appName + " -> " + loginModules.size() + " entry(ies)");
+    return (AppConfigurationEntry[]) loginModules.toArray(new AppConfigurationEntry[0]);
+  }
+
+  /**
+   * Refreshes and reloads this <code>Configuration</code>.
+   *
+   * <p>This method causes this <code>Configuration</code> object to refresh /
+   * reload its contents following the locations and logic described above in
+   * the class documentation section.</p>
+   *
+   * @throws SecurityException if the caller does not have an
+   * {@link AuthPermission} for the action named
+   * <code>refreshLoginConfiguration</code>.
+   * @see AuthPermission
+   */
+  public void refresh()
+  {
+    SecurityManager sm = System.getSecurityManager();
+    if (sm != null)
+      sm.checkPermission(new AuthPermission("refreshLoginConfiguration"));
+
+    loginModulesMap.clear();
+    init();
+  }
+
+  // helper methods -----------------------------------------------------------
+
+  /**
+   * Attempts to find and parse JAAS Login Configuration file(s) written in
+   * the default syntax. The locations searched are as descibed in the class
+   * documentation.
+   */
+  private void init()
+  {
+    if (processSecurityProperties())
+      {
+        if (gnu.java.security.Configuration.DEBUG)
+          log.fine("Using login configuration defined by Security property(ies)");
+      }
+    else if (processSystemProperty())
+      {
+        if (gnu.java.security.Configuration.DEBUG)
+          log.fine("Using login configuration defined by System property");
+      }
+    else if (processUserHome())
+      {
+        if (gnu.java.security.Configuration.DEBUG)
+          log.fine("Using login configuration defined in ${user.home}");
+      }
+    else
+      {
+        if (gnu.java.security.Configuration.DEBUG)
+          log.fine("No login configuration file found");
+      }
+  }
+
+  /**
+   * Attempts to locate and parse one or more JAAS Login Configuration files
+   * defined as the values of the Security properties
+   * <i>java.security.auth.login.config.url.N</i>.
+   *
+   * @return <code>true</code> if it succeeds, and <code>false</code>
+   *         otherwsie.
+   */
+  private boolean processSecurityProperties()
+  {
+    boolean result = false;
+    int counter = 0;
+    String s;
+    while (true)
+      try
+        {
+          counter++;
+          s = Security.getProperty("java.security.auth.login.config.url."
+                                   + counter);
+          if (s == null)
+            break;
+
+          s = s.trim();
+          if (s.length() != 0)
+            {
+              if (gnu.java.security.Configuration.DEBUG)
+                log.fine("java.security.auth.login.config.url." + counter
+                         + " = " + s);
+              parseConfig(getInputStreamFromURL(s));
+              result = true;
+            }
+        }
+      catch (Throwable t)
+        {
+          if (gnu.java.security.Configuration.DEBUG)
+            log.fine("Exception while handling Security property at #"
+                     + counter + ". Continue: " + t);
+        }
+    return result;
+  }
+
+  /**
+   * Attempts to open a designated string as a well-formed {@link URL}. If a
+   * {@link MalformedURLException} occurs, this method then tries to open that
+   * string as a {@link File} (with the same name). If it succeeds, an
+   * {@link InputStream} is constructed and returned.
+   *
+   * @param s
+   *          the designated name of either a {@link URL} or a {@link File}
+   *          assumed to contain a JAAS Login Configuration in the default
+   *          syntax.
+   * @return an {@link InputStream} around the data source.
+   * @throws IOException
+   *           if an exception occurs during the operation.
+   */
+  private InputStream getInputStreamFromURL(String s) throws IOException
+  {
+    InputStream result = null;
+    try
+      {
+        URL url = new URL(s);
+        result = url.openStream();
+      }
+    catch (MalformedURLException x)
+      {
+        if (gnu.java.security.Configuration.DEBUG)
+          log.fine("Failed opening as URL: " + s + ". Will try as File");
+        result = new FileInputStream(s);
+      }
+    return result;
+  }
+
+  /**
+   * Attempts to locate and parse a JAAS Login Configuration file defined as the
+   * value of the System property <i>java.security.auth.login.config</i>.
+   *
+   * @return <code>true</code> if it succeeds, and <code>false</code>
+   *         otherwsie.
+   */
+  private boolean processSystemProperty()
+  {
+    boolean result = false;
+    try
+      {
+        String s = System.getProperty("java.security.auth.login.config");
+        if (s != null)
+          {
+            s = s.trim();
+            if (s.length() != 0)
+              {
+                if (gnu.java.security.Configuration.DEBUG)
+                  log.fine("java.security.auth.login.config = " + s);
+                parseConfig(getInputStreamFromURL(s));
+                result = true;
+              }
+          }
+      }
+    catch (Throwable t)
+      {
+        if (gnu.java.security.Configuration.DEBUG)
+          log.fine("Exception while handling System property. Continue: " + t);
+      }
+    return result;
+  }
+
+  /**
+   * Attempts to locate and parse a JAAS Login Configuration file named either
+   * as <i>.java.login.config</i> or <i>java.login.config</i> (without the
+   * leading dot) in the folder referenced by the System property
+   * <code>user.home</code>.
+   *
+   * @return <code>true</code> if it succeeds, and <code>false</code>
+   *         otherwsie.
+   */
+  private boolean processUserHome()
+  {
+    boolean result = false;
+    try
+      {
+        File userHome = getUserHome();
+        if (userHome == null)
+          return result;
+
+        File jaasFile;
+        jaasFile = getConfigFromUserHome(userHome, ".java.login.config");
+        if (jaasFile == null)
+          jaasFile = getConfigFromUserHome(userHome, "java.login.config");
+
+        if (jaasFile == null)
+          {
+            if (gnu.java.security.Configuration.DEBUG)
+              log.fine("Login Configuration file, in " + userHome
+                       + ", does not exist or is inaccessible");
+            return result;
+          }
+
+        FileInputStream fis = new FileInputStream(jaasFile);
+        parseConfig(fis);
+        result = true;
+      }
+    catch (Throwable t)
+      {
+        if (gnu.java.security.Configuration.DEBUG)
+          log.fine("Exception (ignored) while handling ${user.home}: " + t);
+      }
+    return result;
+  }
+
+  private void parseConfig(InputStream configStream) throws IOException
+  {
+    cp.parse(new InputStreamReader(configStream, "UTF-8"));
+    Map loginModulesMap = cp.getLoginModulesMap();
+    mergeLoginModules(loginModulesMap);
+  }
+
+  private void mergeLoginModules(Map otherLoginModules)
+  {
+    if (otherLoginModules == null || otherLoginModules.size() < 1)
+      return;
+
+    for (Iterator it = otherLoginModules.keySet().iterator(); it.hasNext();)
+      {
+        String appName = (String) it.next();
+        List thatListOfACEs = (List) otherLoginModules.get(appName);
+        if (thatListOfACEs == null || thatListOfACEs.size() < 1)
+          continue;
+
+        List thisListsOfACEs = (List) loginModulesMap.get(appName);
+        if (thisListsOfACEs == null)
+          loginModulesMap.put(appName, thatListOfACEs);
+        else
+          thisListsOfACEs.addAll(thatListOfACEs);
+      }
+  }
+
+  private File getUserHome()
+  {
+    String uh = System.getProperty("user.home");
+    if (uh == null || uh.trim().length() == 0)
+      {
+        if (gnu.java.security.Configuration.DEBUG)
+          log.fine("User home path is not set or is empty");
+        return null;
+      }
+    uh = uh.trim();
+    File result = new File(uh);
+    if (! result.exists())
+      {
+        if (gnu.java.security.Configuration.DEBUG)
+          log.fine("User home '" + uh + "' does not exist");
+        return null;
+      }
+    if (! result.isDirectory())
+      {
+        if (gnu.java.security.Configuration.DEBUG)
+          log.fine("User home '" + uh + "' is not a directory");
+        return null;
+      }
+    if (! result.canRead())
+      {
+        if (gnu.java.security.Configuration.DEBUG)
+          log.fine("User home '" + uh + "' is not readable");
+        return null;
+      }
+    return result;
+  }
+
+  private File getConfigFromUserHome(File userHome, String fileName)
+  {
+    File result = new File(userHome, fileName);
+    if (! result.exists())
+      {
+        if (gnu.java.security.Configuration.DEBUG)
+          log.fine("File '" + fileName + "' does not exist in user's home");
+        return null;
+      }
+    if (! result.isFile())
+      {
+        if (gnu.java.security.Configuration.DEBUG)
+          log.fine("File '" + fileName + "' in user's home is not a file");
+        return null;
+      }
+    if (! result.canRead())
+      {
+        if (gnu.java.security.Configuration.DEBUG)
+          log.fine("File '" + fileName + "' in user's home is not readable");
+        return null;
+      }
+    return result;
+  }
+}