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Trail: The Extension Mechanism
Lesson: Making Extensions Secure
Now that you've seen how to use extensions, you may be wondering what security privileges extensions have. If you're developing an extension that does file I/O, for example, you'll need to know how your extension is granted the appropriate permissions for reading and writing files. Conversely, if you're thinking about using an extension developed by someone else, you'll want to understand clearly what security privileges the extension has and how to change those privileges should you desire to do so.
This section contains some examples that show you what conditions must be met for extensions to be granted permissions to perform security-sensitive operations.
You can optionally seal packages in extension JAR files as an additional security measure. If a package is sealed, it means that all classes defined in that package must originate from a single JAR file. This section shows you how to modify an extension's manifest to seal extension packages.
You'll find links and references to relevant security documentation at appropriate places throughout this lesson.
Previous page: Previous Lesson
Next page: Setting Privileges for Extensions
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