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Inside Java(TM) 2 Platform Security: Architecture, API by Li Gong

By Li Gong

The manager Java protection Architect at solar Microsystems, the place Java comes from, offers a close examine the principal workings of Jana protection structure and describes safety instruments and methods for profitable implementation. He additionally discusses ideas for keeping item safeguard, between them signing, sealing, and guarding gadgets.

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Additional resources for Inside Java(TM) 2 Platform Security: Architecture, API Design, and Implementation

Sample text

A class file is obtained and accepted if it passes preliminary bytecode verification. 2. The class's code source is determined. If the code appears to be signed, this step includes signature verification. 3. The set of static permissions, if any, to be granted to this class is determined, based on the class's code source. 4. A protection domain is created to mark the code source and to hold the statically bound permission set. Then the class is loaded and defined to be associated with the protection domain.

1. The findClass method provides a way to customize the mechanism for looking for classes. Thus, a custom class loader can override this method to specify how a class should be discovered. For example, an applet class loader can override this method to go back to the applet host—origin server—to try to locate the class file and load it over the network. If the class was found by using the previous steps and the resolve flag is true, the loadClass method then calls the final resolveClass method on the resulting Class object to link the class if it hasn't already been linked.

3 Architecture Summary As a summary of the overall process of how the Java 2 security architecture works, this section takes you through the handling of an applet or application. The following steps occur when - 33 - Inside Java™ 2 Platform Security: Architecture, API Design, and Implementation, 2nd viewing an applet, either through a Web browser or appletviewer or when running a Java application, possibly from the command line by invoking the program called java. 1. A class file is obtained and accepted if it passes preliminary bytecode verification.

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