Class SecurityController

  • Direct Known Subclasses:
    PolicySecurityController, SecurityProxy

    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 Detail

      • SecurityController

        public SecurityController()
    • Method Detail

      • createClassLoader

        public abstract 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.
      • getStaticSecurityDomainClass

        public static java.lang.Class<?> getStaticSecurityDomainClass()
      • getStaticSecurityDomainClassInternal

        public java.lang.Class<?> getStaticSecurityDomainClassInternal()
      • 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.
      • callWithDomain

        public java.lang.Object callWithDomain​(java.lang.Object securityDomain,
                                               Context cx,
                                               Callable callable,
                                               Scriptable scope,
                                               Scriptable thisObj,
                                               java.lang.Object[] args)
        Call Callable.call(Context cx, Scriptable scope, Scriptable thisObj, Object[] args) of callable 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 callable.call(cx, scope, thisObj, args) should return a domain incorporate restrictions imposed by securityDomain and Java stack on the moment of callWithDomain invocation.

        The method should always be overridden, it is not declared abstract for compatibility reasons.