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package java.net;

import java.security.*;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.StringTokenizer;


This class is for various network permissions.
A NetPermission contains a name (also referred to as a "target name") but
no actions list; you either have the named permission
or you don't.


The target name is the name of the network permission (see below). The naming
convention follows the  hierarchical property naming convention.
Also, an asterisk
may appear at the end of the name, following a ".", or by itself, to
signify a wildcard match. For example: "foo.*" or "*" is valid,
"*foo" or "a*b" is not valid.


The following table lists all the possible NetPermission target names,
and for each provides a description of what the permission allows
and a discussion of the risks of granting code the permission.






Permission Target Name
What the Permission Allows
Risks of Allowing this Permission




  setDefaultAuthenticator
  The ability to set the
way authentication information is retrieved when
a proxy or HTTP server asks for authentication
  Malicious
code can set an authenticator that monitors and steals user
authentication input as it retrieves the input from the user.




  requestPasswordAuthentication
  The ability
to ask the authenticator registered with the system for
a password
  Malicious code may steal this password.




  specifyStreamHandler
  The ability
to specify a stream handler when constructing a URL
  Malicious code may create a URL with resources that it would
normally not have access to (like file:/foo/fum/), specifying a
stream handler that gets the actual bytes from someplace it does
have access to. Thus it might be able to trick the system into
creating a ProtectionDomain/CodeSource for a class even though
that class really didn't come from that location.




  setProxySelector
  The ability to set the proxy selector used to make decisions
  on which proxies to use when making network connections.
  Malicious code can set a ProxySelector that directs network
  traffic to an arbitrary network host.




  getProxySelector
  The ability to get the proxy selector used to make decisions
  on which proxies to use when making network connections.
  Malicious code can get a ProxySelector to discover proxy
  hosts and ports on internal networks, which could then become
  targets for attack.




  setCookieHandler
  The ability to set the cookie handler that processes highly
  security sensitive cookie information for an Http session.
  Malicious code can set a cookie handler to obtain access to
  highly security sensitive cookie information. Some web servers
  use cookies to save user private information such as access
  control information, or to track user browsing habit.
  



  getCookieHandler
  The ability to get the cookie handler that processes highly
  security sensitive cookie information for an Http session.
  Malicious code can get a cookie handler to obtain access to
  highly security sensitive cookie information. Some web servers
  use cookies to save user private information such as access
  control information, or to track user browsing habit.
  



  setResponseCache
  The ability to set the response cache that provides access to
  a local response cache.
  Malicious code getting access to the local response cache
  could access security sensitive information, or create false
  entries in the response cache.
  



  getResponseCache
  The ability to get the response cache that provides
  access to a local response cache.
  Malicious code getting access to the local response cache
  could access security sensitive information.
  




Author:Marianne Mueller, Roland Schemers
See Also:
/**
 * This class is for various network permissions.
 * A NetPermission contains a name (also referred to as a "target name") but
 * no actions list; you either have the named permission
 * or you don't.
 * <P>
 * The target name is the name of the network permission (see below). The naming
 * convention follows the  hierarchical property naming convention.
 * Also, an asterisk
 * may appear at the end of the name, following a ".", or by itself, to
 * signify a wildcard match. For example: "foo.*" or "*" is valid,
 * "*foo" or "a*b" is not valid.
 * <P>
 * The following table lists all the possible NetPermission target names,
 * and for each provides a description of what the permission allows
 * and a discussion of the risks of granting code the permission.
 * <P>
 *
 * <table border=1 cellpadding=5 summary="Permission target name, what the permission allows, and associated risks">
 * <tr>
 * <th>Permission Target Name</th>
 * <th>What the Permission Allows</th>
 * <th>Risks of Allowing this Permission</th>
 * </tr>
 *
 * <tr>
 *   <td>setDefaultAuthenticator</td>
 *   <td>The ability to set the
 * way authentication information is retrieved when
 * a proxy or HTTP server asks for authentication</td>
 *   <td>Malicious
 * code can set an authenticator that monitors and steals user
 * authentication input as it retrieves the input from the user.</td>
 * </tr>
 *
 * <tr>
 *   <td>requestPasswordAuthentication</td>
 *   <td>The ability
 * to ask the authenticator registered with the system for
 * a password</td>
 *   <td>Malicious code may steal this password.</td>
 * </tr>
 *
 * <tr>
 *   <td>specifyStreamHandler</td>
 *   <td>The ability
 * to specify a stream handler when constructing a URL</td>
 *   <td>Malicious code may create a URL with resources that it would
normally not have access to (like file:/foo/fum/), specifying a
stream handler that gets the actual bytes from someplace it does
have access to. Thus it might be able to trick the system into
creating a ProtectionDomain/CodeSource for a class even though
that class really didn't come from that location.</td>
 * </tr>
 *
 * <tr>
 *   <td>setProxySelector</td>
 *   <td>The ability to set the proxy selector used to make decisions
 *   on which proxies to use when making network connections.</td>
 *   <td>Malicious code can set a ProxySelector that directs network
 *   traffic to an arbitrary network host.</td>
 * </tr>
 *
 * <tr>
 *   <td>getProxySelector</td>
 *   <td>The ability to get the proxy selector used to make decisions
 *   on which proxies to use when making network connections.</td>
 *   <td>Malicious code can get a ProxySelector to discover proxy
 *   hosts and ports on internal networks, which could then become
 *   targets for attack.</td>
 * </tr>
 *
 * <tr>
 *   <td>setCookieHandler</td>
 *   <td>The ability to set the cookie handler that processes highly
 *   security sensitive cookie information for an Http session.</td>
 *   <td>Malicious code can set a cookie handler to obtain access to
 *   highly security sensitive cookie information. Some web servers
 *   use cookies to save user private information such as access
 *   control information, or to track user browsing habit.</td>
 *   </tr>
 *
 * <tr>
 *   <td>getCookieHandler</td>
 *   <td>The ability to get the cookie handler that processes highly
 *   security sensitive cookie information for an Http session.</td>
 *   <td>Malicious code can get a cookie handler to obtain access to
 *   highly security sensitive cookie information. Some web servers
 *   use cookies to save user private information such as access
 *   control information, or to track user browsing habit.</td>
 *   </tr>
 *
 * <tr>
 *   <td>setResponseCache</td>
 *   <td>The ability to set the response cache that provides access to
 *   a local response cache.</td>
 *   <td>Malicious code getting access to the local response cache
 *   could access security sensitive information, or create false
 *   entries in the response cache.</td>
 *   </tr>
 *
 * <tr>
 *   <td>getResponseCache</td>
 *   <td>The ability to get the response cache that provides
 *   access to a local response cache.</td>
 *   <td>Malicious code getting access to the local response cache
 *   could access security sensitive information.</td>
 *   </tr>
 *
 * </table>
 *
 * @see java.security.BasicPermission
 * @see java.security.Permission
 * @see java.security.Permissions
 * @see java.security.PermissionCollection
 * @see java.lang.SecurityManager
 *
 *
 * @author Marianne Mueller
 * @author Roland Schemers
 */

public final class NetPermission extends BasicPermission {
    private static final long serialVersionUID = -8343910153355041693L;

    
Creates a new NetPermission with the specified name.
The name is the symbolic name of the NetPermission, such as
"setDefaultAuthenticator", etc. An asterisk
may appear at the end of the name, following a ".", or by itself, to
signify a wildcard match.

Params:
  • name – the name of the NetPermission.
Throws:
/**
     * Creates a new NetPermission with the specified name.
     * The name is the symbolic name of the NetPermission, such as
     * "setDefaultAuthenticator", etc. An asterisk
     * may appear at the end of the name, following a ".", or by itself, to
     * signify a wildcard match.
     *
     * @param name the name of the NetPermission.
     *
     * @throws NullPointerException if <code>name</code> is <code>null</code>.
     * @throws IllegalArgumentException if <code>name</code> is empty.
     */

    public NetPermission(String name)
    {
        super(name);
    }

    
Creates a new NetPermission object with the specified name.
The name is the symbolic name of the NetPermission, and the
actions String is currently unused and should be null.

Params:
  • name – the name of the NetPermission.
  • actions – should be null.
Throws:
/**
     * Creates a new NetPermission object with the specified name.
     * The name is the symbolic name of the NetPermission, and the
     * actions String is currently unused and should be null.
     *
     * @param name the name of the NetPermission.
     * @param actions should be null.
     *
     * @throws NullPointerException if <code>name</code> is <code>null</code>.
     * @throws IllegalArgumentException if <code>name</code> is empty.
     */

    public NetPermission(String name, String actions)
    {
        super(name, actions);
    }
}