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Java(TM) 2 Platform, Standard Edition, v1.2.2 API Specification: Class SerializablePermission - JDK 5 Documentation v1.2.2, Java 2 SDK 英文文档

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java.io
Class SerializablePermission

java.lang.Object
  |
  +--java.security.Permission
        |
        +--java.security.BasicPermission
              |
              +--java.io.SerializablePermission

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public final class SerializablePermission

extends BasicPermission

This class is for Serializable permissions. A SerializablePermission 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 Serializable permission (see below).

The following table lists all the possible SerializablePermission 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
enableSubclassImplementation	Subclass implementation of ObjectOutputStream or ObjectInputStream to override the default serialization or deserialization, respectively, of objects	Code can use this to serialize or deserialize classes in a purposefully malfeasant manner. For example, during serialization, malicious code can use this to purposefully store confidential private field data in a way easily accessible to attackers. Or, during deserializaiton it could, for example, deserialize a class with all its private fields zeroed out.
enableSubstitution	Substitution of one object for another during serialization or deserialization	This is dangerous because malicious code can replace the actual object with one which has incorrect or malignant data.

See Also:

BasicPermission, Permission, Permissions, PermissionCollection, SecurityManager, Serialized Form

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Constructor Summary

SerializablePermission(String name)           Creates a new SerializablePermission with the specified name.

SerializablePermission(String name, String actions)           Creates a new SerializablePermission object with the specified name.

 

Methods inherited from class java.security.BasicPermission

equals, getActions, hashCode, implies, newPermissionCollection

 

Methods inherited from class java.security.Permission

checkGuard, getName, toString

 

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

 

Constructor Detail

SerializablePermission

public SerializablePermission(String name)

Creates a new SerializablePermission with the specified name. The name is the symbolic name of the SerializablePermission, such as "enableSubstitution", etc.

Parameters:

name - the name of the SerializablePermission.

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SerializablePermission

public SerializablePermission(String name,
                              String actions)

Creates a new SerializablePermission object with the specified name. The name is the symbolic name of the SerializablePermission, and the actions String is currently unused and should be null. This constructor exists for use by the Policy object to instantiate new Permission objects.

Parameters:

name - the name of the SerializablePermission.

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