May 2001
Intermediate to advanced
618 pages
20h 50m
English
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Security Debugging
The Java security packages include
debugging
code that you can enable via a system property. The property in
question is
java.security.debug
, and it may be set to the following
values:
- all
Turn on all the debugging options.
- access
Trace all calls to the
checkPermission( )method of the access controller. This allows you to see which permissions your code is requesting, which calls are succeeding, and which ones are failing.This option has the following sub-options. If no sub-option is specified, then all are in force:
- stack
Dump the stack every time a permission is checked.
- failure
Dump the stack only when a permission is denied.
- domain
Dump the protection domain in force when a protection is checked.
- jar
When processing a signed jar file, print the signatures in the file, their certificates, and the classes to which they apply.
- policy
Print information about policy files as they are parsed, including their location in the filesystem, the permissions they grant, and the certificates they use for signed code.
- scl
Print information about the permissions granted directly by a secure class loader (rather than granted through a policy file).
These options should be given as a comma-separated list (including
the sub-options for the access option). For example, to see the
permissions granted by the secure class loader and see a stack trace
when a permission check fails, you would specify
-Djava.security.debug=scl,access,failure on the
command line.
JSSE extends this facility ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.