java.net
Class NetPermission

java.lang.Object sample code for java.lang.Object definition code for java.lang.Object 
  extended by java.security.Permission sample code for java.security.Permission definition code for java.security.Permission 
      extended by java.security.BasicPermission sample code for java.security.BasicPermission definition code for java.security.BasicPermission 
          extended by java.net.NetPermission
All Implemented Interfaces:
Serializable sample code for java.io.Serializable definition code for java.io.Serializable , Guard sample code for java.security.Guard definition code for java.security.Guard

public final class NetPermission
extends BasicPermission sample code for java.security.BasicPermission definition code for java.security.BasicPermission

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.

See Also:
BasicPermission sample code for java.security.BasicPermission definition code for java.security.BasicPermission , Permission sample code for java.security.Permission definition code for java.security.Permission , Permissions sample code for java.security.Permissions definition code for java.security.Permissions , PermissionCollection sample code for java.security.PermissionCollection definition code for java.security.PermissionCollection , SecurityManager sample code for java.lang.SecurityManager definition code for java.lang.SecurityManager , Serialized Form

Constructor Summary
NetPermission sample code for java.net.NetPermission.NetPermission(java.lang.String) definition code for java.net.NetPermission.NetPermission(java.lang.String) (String sample code for java.lang.String definition code for java.lang.String  name)
          Creates a new NetPermission with the specified name.
NetPermission sample code for java.net.NetPermission.NetPermission(java.lang.String, java.lang.String) definition code for java.net.NetPermission.NetPermission(java.lang.String, java.lang.String) (String sample code for java.lang.String definition code for java.lang.String  name, String sample code for java.lang.String definition code for java.lang.String  actions)
          Creates a new NetPermission object with the specified name.
 
Method Summary
 
Methods inherited from class java.security.BasicPermission sample code for java.security.BasicPermission definition code for java.security.BasicPermission
equals sample code for java.security.BasicPermission.equals(java.lang.Object) definition code for java.security.BasicPermission.equals(java.lang.Object) , getActions sample code for java.security.BasicPermission.getActions() definition code for java.security.BasicPermission.getActions() , hashCode sample code for java.security.BasicPermission.hashCode() definition code for java.security.BasicPermission.hashCode() , implies sample code for java.security.BasicPermission.implies(java.security.Permission) definition code for java.security.BasicPermission.implies(java.security.Permission) , newPermissionCollection sample code for java.security.BasicPermission.newPermissionCollection() definition code for java.security.BasicPermission.newPermissionCollection()
 
Methods inherited from class java.security.Permission sample code for java.security.Permission definition code for java.security.Permission
checkGuard sample code for java.security.Permission.checkGuard(java.lang.Object) definition code for java.security.Permission.checkGuard(java.lang.Object) , getName sample code for java.security.Permission.getName() definition code for java.security.Permission.getName() , toString sample code for java.security.Permission.toString() definition code for java.security.Permission.toString()
 
Methods inherited from class java.lang.Object sample code for java.lang.Object definition code for java.lang.Object
clone sample code for java.lang.Object.clone() definition code for java.lang.Object.clone() , finalize sample code for java.lang.Object.finalize() definition code for java.lang.Object.finalize() , getClass sample code for java.lang.Object.getClass() definition code for java.lang.Object.getClass() , notify sample code for java.lang.Object.notify() definition code for java.lang.Object.notify() , notifyAll sample code for java.lang.Object.notifyAll() definition code for java.lang.Object.notifyAll() , wait sample code for java.lang.Object.wait() definition code for java.lang.Object.wait() , wait sample code for java.lang.Object.wait(long) definition code for java.lang.Object.wait(long) , wait sample code for java.lang.Object.wait(long, int) definition code for java.lang.Object.wait(long, int)
 

Constructor Detail

NetPermission sample code for java.net.NetPermission(java.lang.String) definition code for java.net.NetPermission(java.lang.String)

public NetPermission(String sample code for java.lang.String definition code for java.lang.String  name)
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.

Parameters:
name - the name of the NetPermission.

NetPermission sample code for java.net.NetPermission(java.lang.String, java.lang.String) definition code for java.net.NetPermission(java.lang.String, java.lang.String)

public NetPermission(String sample code for java.lang.String definition code for java.lang.String  name,
                     String sample code for java.lang.String definition code for java.lang.String  actions)
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.

Parameters:
name - the name of the NetPermission.
actions - should be null.