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https://issues.apache.org/jira/browse/DERBY-2109?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12560541#action_12560541
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Rick Hillegas commented on DERBY-2109:
--------------------------------------

The wildcarded Principal name is only needed for the case that we want to grant 
privileges to principals of the form [EMAIL PROTECTED] (or [EMAIL PROTECTED]). 
If we agree that we aren't going to use the policy file to regulate privileges 
at the database level, then the existing policy file syntax will cover the 
remaining wildcard case (the system-wide wildcard) as John and Martin have 
pointed out:

grant {
  // grant any user to shutdown the engine
  permission org.apache.derby.security.SystemPermission "shutdownEngine";

  // grant any user to create databases anywhere
  // (to succeed actual locations require additional file permission grants)
  permission org.apache.derby.security.DatabasePermission "directory:<<ALL 
FILES>>", "create";
};

By eliminating the two special characters, * and @, we eliminate most of the 
escaping cases. And we don't need to specify PUBLIC in the policy file. If 
SystemPrincipal represents a system-wide UserName, then I think we clear up a 
lot of the confusion.

> System privileges
> -----------------
>
>                 Key: DERBY-2109
>                 URL: https://issues.apache.org/jira/browse/DERBY-2109
>             Project: Derby
>          Issue Type: New Feature
>          Components: Security
>    Affects Versions: 10.3.1.4
>            Reporter: Rick Hillegas
>            Assignee: Martin Zaun
>         Attachments: DERBY-2109-02.diff, DERBY-2109-02.stat, 
> derby-2109-03-javadoc-see-tags.diff, DERBY-2109-04.diff, DERBY-2109-04.stat, 
> DERBY-2109-05and06.diff, DERBY-2109-05and06.stat, DERBY-2109-07.diff, 
> DERBY-2109-07.stat, DERBY-2109-08.diff, DERBY-2109-08.stat, 
> DERBY-2109-08_addendum.diff, DERBY-2109-08_addendum.stat, 
> SystemPrivilegesBehaviour.html, systemPrivs.html, systemPrivs.html, 
> systemPrivs.html, systemPrivs.html
>
>
> Add mechanisms for controlling system-level privileges in Derby. See the 
> related email discussion at 
> http://article.gmane.org/gmane.comp.apache.db.derby.devel/33151.
> The 10.2 GRANT/REVOKE work was a big step forward in making Derby more  
> secure in a client/server configuration. I'd like to plug more client/server 
> security holes in 10.3. In particular, I'd like to focus on  authorization 
> issues which the ANSI spec doesn't address.
> Here are the important issues which came out of the email discussion.
> Missing privileges that are above the level of a single database:
> - Create Database
> - Shutdown all databases
> - Shutdown System
> Missing privileges specific to a particular database:
> - Shutdown that Database
> - Encrypt that database
> - Upgrade database
> - Create (in that Database) Java Plugins (currently  Functions/Procedures, 
> but someday Aggregates and VTIs)
> Note that 10.2 gave us GRANT/REVOKE control over the following  
> database-specific issues, via granting execute privilege to system  
> procedures:
> Jar Handling
> Backup Routines
> Admin Routines
> Import/Export
> Property Handling
> Check Table
> In addition, since 10.0, the privilege of connecting to a database has been 
> controlled by two properties (derby.database.fullAccessUsers and 
> derby.database.defaultConnectionMode) as described in the security section of 
> the Developer's Guide (see 
> http://db.apache.org/derby/docs/10.2/devguide/cdevcsecure865818.html).

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