org.mozilla.javascript
Class SecurityController

java.lang.Object
  |
  +--org.mozilla.javascript.SecurityController

public abstract class SecurityController

extends java.lang.Object

This class describes the support needed to implement security.

Three main pieces of functionality are required to implement security for JavaScript. First, it must be possible to define classes with an associated security domain. (This security domain may be any object incorporating notion of access restrictions that has meaning to an embedding; for a client-side JavaScript embedding this would typically be java.security.ProtectionDomain or similar object depending on an origin URL and/or a digital certificate.) Next it must be possible to get a security domain object that allows a particular action only if all security domains associated with code on the current Java stack allows it. And finally, it must be possible to execute script code with associated security domain injected into Java stack.

These three pieces of functionality are encapsulated in the SecurityController class.

Since:

1.5 Release 4

See Also:

Context.setSecurityController(SecurityController), ClassLoader

Constructor Summary

SecurityController()

Method Summary

abstract org.mozilla.javascript.GeneratedClassLoader	createClassLoader(java.lang.ClassLoader parentLoader, java.lang.Object securityDomain) Get class loader-like object that can be used to define classes with the given security context.
abstract java.lang.Object	execWithDomain(Context cx, Scriptable scope, Script script, java.lang.Object securityDomain) Call Script.exec(Context cx, Scriptable scope) of script under restricted security domain where an action is allowed only if it is allowed according to the Java stack on the moment of the execWithDomain call and securityDomain.
abstract java.lang.Object	getDynamicSecurityDomain(java.lang.Object securityDomain) Get dynamic security domain that allows an action only if it is allowed by the current Java stack and securityDomain.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SecurityController

public SecurityController()

Method Detail

createClassLoader

public abstract org.mozilla.javascript.GeneratedClassLoader createClassLoader(java.lang.ClassLoader parentLoader,
                                                                              java.lang.Object securityDomain)

Get class loader-like object that can be used to define classes with the given security context.

Parameters:

parentLoader - parent class loader to delegate search for classes not defined by the class loader itself

securityDomain - some object specifying the security context of the code that is defined by the returned class loader.

getDynamicSecurityDomain

public abstract java.lang.Object getDynamicSecurityDomain(java.lang.Object securityDomain)

Get dynamic security domain that allows an action only if it is allowed by the current Java stack and securityDomain. If securityDomain is null, return domain representing permissions allowed by the current stack.

execWithDomain

public abstract java.lang.Object execWithDomain(Context cx,
                                                Scriptable scope,
                                                Script script,
                                                java.lang.Object securityDomain)
                                         throws JavaScriptException

Call Script.exec(Context cx, Scriptable scope) of script under restricted security domain where an action is allowed only if it is allowed according to the Java stack on the moment of the execWithDomain call and securityDomain. Any call to getDynamicSecurityDomain(Object) during execution of Script.exec(Context cx, Scriptable scope) should return a domain incorporate restrictions imposed by securityDomain.