Basic HTML version of Foils prepared April 7 1998

Foil 128 Importing and Exporting Functions

From Basic Principles of Java and Internet Security CPS616 Web Technologies -- Spring 98. by Geoffrey C. Fox


1 You might want to provide interfaces to call into secure containers (windows and layers). To do so, you use the import and export statements.
2 Exporting a function name makes it available to be imported by scripts outside the container without being subject to a container test.Importing a function into your scope creates a new function of the same name as the imported function. Calling that function calls the corresponding function from the secure container.
3 One should be very careful to not inadvertently allow access to an attacker

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