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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.*" and "*" signify a wildcard
match, while "*foo" and "a*b" do not.
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, and associated risks
Permission Target Name
What the Permission Allows
Risks of Allowing this Permission
allowHttpTrace
The ability to use the HTTP TRACE method in HttpURLConnection.
Malicious code using HTTP TRACE could get access to security sensitive
information in the HTTP headers (such as cookies) that it might not
otherwise have access to.
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.
getNetworkInformation
The ability to retrieve all information about local network interfaces.
Malicious code can read information about network hardware such as
MAC addresses, which could be used to construct local IPv6 addresses.
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.
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.
requestPasswordAuthentication
The ability
to ask the authenticator registered with the system for
a password
Malicious code may steal this password.
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.
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.
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.
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.
setSocketImpl
The ability to create a sub-class of Socket or ServerSocket with a
user specified SocketImpl.
Malicious user-defined SocketImpls can change the behavior of
Socket and ServerSocket in surprising ways, by virtue of their
ability to access the protected fields of SocketImpl.
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.
Author: Marianne Mueller, Roland Schemers See Also: - BasicPermission
- Permission
- Permissions
- PermissionCollection
- SecurityManager
Since: 1.2
/**
* 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.*" and "*" signify a wildcard
* match, while "*foo" and "a*b" do not.
* <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.
*
* <table class="striped">
* <caption style="display:none">Permission target name, what the permission allows, and associated risks</caption>
* <thead>
* <tr>
* <th scope="col">Permission Target Name</th>
* <th scope="col">What the Permission Allows</th>
* <th scope="col">Risks of Allowing this Permission</th>
* </tr>
* </thead>
* <tbody>
* <tr>
* <th scope="row">allowHttpTrace</th>
* <td>The ability to use the HTTP TRACE method in HttpURLConnection.</td>
* <td>Malicious code using HTTP TRACE could get access to security sensitive
* information in the HTTP headers (such as cookies) that it might not
* otherwise have access to.</td>
* </tr>
*
* <tr>
* <th scope="row">getCookieHandler</th>
* <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>
* <th scope="row">getNetworkInformation</th>
* <td>The ability to retrieve all information about local network interfaces.</td>
* <td>Malicious code can read information about network hardware such as
* MAC addresses, which could be used to construct local IPv6 addresses.</td>
* </tr>
*
* <tr>
* <th scope="row">getProxySelector</th>
* <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>
* <th scope="row">getResponseCache</th>
* <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>
*
* <tr>
* <th scope="row">requestPasswordAuthentication</th>
* <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>
* <th scope="row">setCookieHandler</th>
* <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>
* <th scope="row">setDefaultAuthenticator</th>
* <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>
* <th scope="row">setProxySelector</th>
* <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>
* <th scope="row">setResponseCache</th>
* <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>
* <th scope="row">setSocketImpl</th>
* <td>The ability to create a sub-class of Socket or ServerSocket with a
* user specified SocketImpl.</td>
* <td>Malicious user-defined SocketImpls can change the behavior of
* Socket and ServerSocket in surprising ways, by virtue of their
* ability to access the protected fields of SocketImpl.</td>
* </tr>
*
* <tr>
* <th scope="row">specifyStreamHandler</th>
* <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>
</tbody>
* </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
* @since 1.2
*/
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: - NullPointerException – if
name
is null
. - IllegalArgumentException – if
name
is empty.
/**
* 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} is {@code null}.
* @throws IllegalArgumentException if {@code name} 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: - NullPointerException – if
name
is null
. - IllegalArgumentException – if
name
is empty.
/**
* 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} is {@code null}.
* @throws IllegalArgumentException if {@code name} is empty.
*/
public NetPermission(String name, String actions)
{
super(name, actions);
}
}