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java.net
class NetPermission
- All Implemented Interfaces:
- Serializable, Guard
public final class NetPermission
extends 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 (auto-generated):
-
AccessController
SecurityManager
URL
Constructor Summary |
Creates a new NetPermission with the specified name.
|
Creates a new NetPermission object with the specified name.
|
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
NetPermission
public NetPermission(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
public NetPermission(String name,
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.
This documentation differs from the official API.
Jadeite adds
extra features to the API including:
variable font sizes,
constructions examples,
placeholders for classes and methods, and auto-generated “See Also” links.
Additionally it
is missing some items found in standard Javadoc documentation, including:
generics type information,
“Deprecated” tags and comments,
“See Also” links,
along with other minor differences.
Please send any questions or feedback to
bam@cs.cmu.edu.
This page displays the
Jadeite version of the documention, which is derived from the offical documentation that contains this copyright notice:
The official Sun™ documentation can be found here at
http://java.sun.com/javase/6/docs/api/.