libjava/java/security/Security.java - gcc.git - Git at Google

 /* Security.java --- Java base security class implmentation
    Copyright (C) 1999, 2001 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., 59 Temple Place, Suite 330, Boston, MA
 02111-1307 USA.

 As a special exception, if you link this library with other files to
 produce an executable, this library does not by itself cause the
 resulting executable to be covered by the GNU General Public License.
 This exception does not however invalidate any other reasons why the
 executable file might be covered by the GNU General Public License. */

 package java.security;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.FileNotFoundException;
 import java.security.Provider;
 import java.util.Vector;
 import java.util.Enumeration;
 import java.util.Properties;

 /**
    Security class that loads the Providers and provides an
    interface to security properties.

    @author Mark Benvenuto <ivymccough@worldnet.att.net>
  */

 public final class Security extends Object
 {
   private static Vector providers = new Vector();
   private static Properties secprops;

   static
   {
     loadProviders(System.getProperty("java.vm.name"));
     loadProviders("classpath");
   }

   // This class can't be instantiated.
   private Security ()
   {
   }

   private static void loadProviders(String vendor)
   {
     if (vendor == null)
       return;

     String separator = System.getProperty("file.separator");
     String secfilestr = (System.getProperty("java.home") +
 			 separator + "lib" +
 			 separator + "security" +
 			 separator + vendor + ".security");

     try
       {
 	FileInputStream fin = new FileInputStream(secfilestr);
 	secprops = new Properties();
 	secprops.load(fin);

 	int i = 1;
 	String name;

 	while ((name = secprops.getProperty("security.provider." + i++)) !=
 	       null)
 	  {
 	    Exception exception = null;

 	    try
 	      {
 		providers.addElement(Class.forName(name).newInstance());
 		i++;
 	      }
 	    catch (ClassNotFoundException x)
 	      {
 	        exception = x;
 	      }
 	    catch (InstantiationException x)
 	      {
 	        exception = x;
 	      }
 	    catch (IllegalAccessException x)
 	      {
 	        exception = x;
 	      }
 	    if (exception != null)
 	      System.err.println ("Error loading security provider " + name
 	                          + ": " + exception);
 	  }
       }
     catch (FileNotFoundException ignored)
       {
         // Actually we probibly shouldn't ignore these, once the security
 	// properties file is actually installed somewhere.
       }
     catch (IOException ignored)
       {
       }
   }

   /**
      Gets a specific property for an algorithm. This is used to produce specialized
      algorithm parsers.

      @deprecated it used to a return the value of a propietary property
      for the "SUN" Cryptographic Service Provider to obtain
      algorithm-specific parameters. Used AlogorithmParameters and
      KeyFactory instead.

      @param algName name of algorithm to get property of
      @param propName name of property to check

      @return a string containing the value of the property
    */
   public static String getAlgorithmProperty(String algName, String propName)
   {
     /* TODO: Figure out what this actually does */
     return null;
   }

   /**
      Adds a new provider at the specified position. This allows dynamic loading
      of providers. It will check for duplication of providers.

      This class checks the security manager with the call checkSecurityAccess
      with "insertProvider."+provider.getName() to see if the user can add this
      provider.

      @param provider the provider to add
      @param position position to add the provider at

      @return the position the provider was added at, or -1 if a duplicate provider
      was found

      @throws SecurityException - if the security manager denies access to add a
      new provider
    */
   public static int insertProviderAt(Provider provider, int position)
   {
     SecurityManager sm = System.getSecurityManager();
     if (sm != null)
       sm.checkSecurityAccess("insertProvider." + provider.getName());

     int max = providers.size ();
     for (int i = 0; i < max; i++)
       {
 	if (((Provider) providers.elementAt(i)).getName() ==
 	    provider.getName())
 	  return -1;
       }

     if (position < 0)
       position = 0;
     if (position > max)
       position = max;

     providers.insertElementAt(provider, position);

     return position;
   }


   /**
      Adds a new provider. This allows dynamic loading
      of providers. It will check for duplication of providers.

      This method checks the security manager with the call checkSecurityAccess
      with "insertProvider."+provider.getName() to see if the user can add this
      provider.

      @param provider the provider to add

      @return the position the provider was added at, or -1 if a duplicate provider
      was found

      @throws SecurityException - if the security manager denies access to add a
      new provider
    */
   public static int addProvider(Provider provider)
   {
     return insertProviderAt (provider, providers.size ());
   }

   /**
      Removes a provider. This allows dynamic unloading
      of providers. It will automatically shift up providers to a higher
      ranking. If the provider is not installed, it fails silently.

      This method checks the security manager with the call checkSecurityAccess
      with "removeProvider."+provider.getName() to see if the user can remove this
      provider.

      @param name name of the provider to add

      @throws SecurityException - if the security manager denies access to remove a
      new provider
    */
   public static void removeProvider(String name)
   {
     SecurityManager sm = System.getSecurityManager();
     if (sm != null)
       sm.checkSecurityAccess("removeProvider." + name);

     Provider p = null;
     int max = providers.size ();
     for (int i = 0; i < max; i++)
       {
 	if (((Provider) providers.elementAt(i)).getName() == name)
 	  {
 	    providers.remove(i);
 	    break;
 	  }
       }
   }

   /**
      Returns array containing all the providers. It is in the preference order
      of the providers.

      @return an array of installed providers
    */
   public static Provider[] getProviders()
   {
     Provider array[] = new Provider[providers.size ()];
     providers.copyInto (array);
     return array;
   }

   /**
      Returns the provider with the specified name. It will return null
      if the provider cannot be found.

      @param name name of the requested provider

      @return requested provider
    */
   public static Provider getProvider(String name)
   {
     Provider p = null;
     int max = providers.size ();
     for (int i = 0; i < max; i++)
       {
 	p = (Provider) providers.elementAt(i);
 	if (p.getName() == name)
 	  break;
       }
     return p;
   }

   /**
      Gets the value of a security property.

      This method checks the security manager with the call checkSecurityAccess
      with "getProperty."+key to see if the user can get this property.

      @param key property to get

      @return value of the property

      @throws SecurityException - if the security manager denies access to
      getting a property
    */
   public static String getProperty(String key)
   {
     SecurityManager sm = System.getSecurityManager();
     if (sm != null)
       sm.checkSecurityAccess("getProperty." + key);

     return secprops.getProperty(key);
   }


   /**
      Sets the value of a security property.

      This method checks the security manager with the call checkSecurityAccess
      with "setProperty."+key to see if the user can get this property.

      @param key property to set
      @param datnum new value of property

      @throws SecurityException - if the security manager denies access to
      setting a property
    */
   public static void setProperty(String key, String datnum)
   {
     SecurityManager sm = System.getSecurityManager();
     if (sm != null)
       sm.checkSecurityAccess("setProperty." + key);

     secprops.put(key, datnum);
   }
 }
	/* Security.java --- Java base security class implmentation
	Copyright (C) 1999, 2001 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., 59 Temple Place, Suite 330, Boston, MA
	02111-1307 USA.

	As a special exception, if you link this library with other files to
	produce an executable, this library does not by itself cause the
	resulting executable to be covered by the GNU General Public License.
	This exception does not however invalidate any other reasons why the
	executable file might be covered by the GNU General Public License. */

	package java.security;
	import java.io.File;
	import java.io.FileInputStream;
	import java.io.IOException;
	import java.io.FileNotFoundException;
	import java.security.Provider;
	import java.util.Vector;
	import java.util.Enumeration;
	import java.util.Properties;

	/**
	Security class that loads the Providers and provides an
	interface to security properties.

	@author Mark Benvenuto <ivymccough@worldnet.att.net>
	*/

	public final class Security extends Object
	{
	private static Vector providers = new Vector();
	private static Properties secprops;

	static
	{
	loadProviders(System.getProperty("java.vm.name"));
	loadProviders("classpath");
	}

	// This class can't be instantiated.
	private Security ()
	{
	}

	private static void loadProviders(String vendor)
	{
	if (vendor == null)
	return;

	String separator = System.getProperty("file.separator");
	String secfilestr = (System.getProperty("java.home") +
	separator + "lib" +
	separator + "security" +
	separator + vendor + ".security");

	try
	{
	FileInputStream fin = new FileInputStream(secfilestr);
	secprops = new Properties();
	secprops.load(fin);

	int i = 1;
	String name;

	while ((name = secprops.getProperty("security.provider." + i++)) !=
	null)
	{
	Exception exception = null;

	try
	{
	providers.addElement(Class.forName(name).newInstance());
	i++;
	}
	catch (ClassNotFoundException x)
	{
	exception = x;
	}
	catch (InstantiationException x)
	{
	exception = x;
	}
	catch (IllegalAccessException x)
	{
	exception = x;
	}
	if (exception != null)
	System.err.println ("Error loading security provider " + name
	+ ": " + exception);
	}
	}
	catch (FileNotFoundException ignored)
	{
	// Actually we probibly shouldn't ignore these, once the security
	// properties file is actually installed somewhere.
	}
	catch (IOException ignored)
	{
	}
	}

	/**
	Gets a specific property for an algorithm. This is used to produce specialized
	algorithm parsers.

	@deprecated it used to a return the value of a propietary property
	for the "SUN" Cryptographic Service Provider to obtain
	algorithm-specific parameters. Used AlogorithmParameters and
	KeyFactory instead.

	@param algName name of algorithm to get property of
	@param propName name of property to check

	@return a string containing the value of the property
	*/
	public static String getAlgorithmProperty(String algName, String propName)
	{
	/* TODO: Figure out what this actually does */
	return null;
	}

	/**
	Adds a new provider at the specified position. This allows dynamic loading
	of providers. It will check for duplication of providers.

	This class checks the security manager with the call checkSecurityAccess
	with "insertProvider."+provider.getName() to see if the user can add this
	provider.

	@param provider the provider to add
	@param position position to add the provider at

	@return the position the provider was added at, or -1 if a duplicate provider
	was found

	@throws SecurityException - if the security manager denies access to add a
	new provider
	*/
	public static int insertProviderAt(Provider provider, int position)
	{
	SecurityManager sm = System.getSecurityManager();
	if (sm != null)
	sm.checkSecurityAccess("insertProvider." + provider.getName());

	int max = providers.size ();
	for (int i = 0; i < max; i++)
	{
	if (((Provider) providers.elementAt(i)).getName() ==
	provider.getName())
	return -1;
	}

	if (position < 0)
	position = 0;
	if (position > max)
	position = max;

	providers.insertElementAt(provider, position);

	return position;
	}


	/**
	Adds a new provider. This allows dynamic loading
	of providers. It will check for duplication of providers.

	This method checks the security manager with the call checkSecurityAccess
	with "insertProvider."+provider.getName() to see if the user can add this
	provider.

	@param provider the provider to add

	@return the position the provider was added at, or -1 if a duplicate provider
	was found

	@throws SecurityException - if the security manager denies access to add a
	new provider
	*/
	public static int addProvider(Provider provider)
	{
	return insertProviderAt (provider, providers.size ());
	}

	/**
	Removes a provider. This allows dynamic unloading
	of providers. It will automatically shift up providers to a higher
	ranking. If the provider is not installed, it fails silently.

	This method checks the security manager with the call checkSecurityAccess
	with "removeProvider."+provider.getName() to see if the user can remove this
	provider.

	@param name name of the provider to add

	@throws SecurityException - if the security manager denies access to remove a
	new provider
	*/
	public static void removeProvider(String name)
	{
	SecurityManager sm = System.getSecurityManager();
	if (sm != null)
	sm.checkSecurityAccess("removeProvider." + name);

	Provider p = null;
	int max = providers.size ();
	for (int i = 0; i < max; i++)
	{
	if (((Provider) providers.elementAt(i)).getName() == name)
	{
	providers.remove(i);
	break;
	}
	}
	}

	/**
	Returns array containing all the providers. It is in the preference order
	of the providers.

	@return an array of installed providers
	*/
	public static Provider[] getProviders()
	{
	Provider array[] = new Provider[providers.size ()];
	providers.copyInto (array);
	return array;
	}

	/**
	Returns the provider with the specified name. It will return null
	if the provider cannot be found.

	@param name name of the requested provider

	@return requested provider
	*/
	public static Provider getProvider(String name)
	{
	Provider p = null;
	int max = providers.size ();
	for (int i = 0; i < max; i++)
	{
	p = (Provider) providers.elementAt(i);
	if (p.getName() == name)
	break;
	}
	return p;
	}

	/**
	Gets the value of a security property.

	This method checks the security manager with the call checkSecurityAccess
	with "getProperty."+key to see if the user can get this property.

	@param key property to get

	@return value of the property

	@throws SecurityException - if the security manager denies access to
	getting a property
	*/
	public static String getProperty(String key)
	{
	SecurityManager sm = System.getSecurityManager();
	if (sm != null)
	sm.checkSecurityAccess("getProperty." + key);

	return secprops.getProperty(key);
	}


	/**
	Sets the value of a security property.

	This method checks the security manager with the call checkSecurityAccess
	with "setProperty."+key to see if the user can get this property.

	@param key property to set
	@param datnum new value of property

	@throws SecurityException - if the security manager denies access to
	setting a property
	*/
	public static void setProperty(String key, String datnum)
	{
	SecurityManager sm = System.getSecurityManager();
	if (sm != null)
	sm.checkSecurityAccess("setProperty." + key);

	secprops.put(key, datnum);
	}
	}