Access control contexts (silly idea)

[Casey Marshall]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hi,

I was looking into ways to implement the AccessController.getContext
method, and devised a way to do it without dipping into native
methods. In short, it uses the getStackTrace method of Throwable to
obtain the current stack, fetches each Class named in the stack, then
gets the ProtectionDomain for that Class.

This is a kludge, and I would not be surprised that certain conditions
cause this to fail.

At any rate, there is a bug in the AccessControlContext constructor
that references the protectionDomain array before it is created.

Patches attached. Comments?

2004-02-10  Casey Marshall <address@hidden>

        * java/security/AccessControlContext.java
        (<init>): compare entries in the `context' array.
        Use `equals', not `=='.
        (toString): new method.

2004-02-10  Casey Marshall <address@hidden>

        * java/security/AccessController.java
        (contexts): new class field.
        (defaultContext): new constant.
        (doPrivileged): put supplied contexts into `contexts'.
        (doPrivileged): likewise.
        (getContext): implemented.

        * java/lang/SecurityManager.java
        (getSecurityContext): use AccessController.getContext().
        (checkPermission): use AccessControlContext.checkPermission().
        (checkPermission): likewise.
        (checkConnect): likewise.

- -- 
Casey Marshall || address@hidden
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.3 (GNU/Linux)
Comment: Processed by Mailcrypt 3.5.7 <http://mailcrypt.sourceforge.net/>

iD8DBQFAKS4PgAuWMgRGsWsRAkO5AJ9uKub/3ocBRbYyYKzgnYZZ+KSbrwCeMRDc
mmymlIQIaDZrsJ2cwA/PlBU=
=DvZ9
-----END PGP SIGNATURE-----

ac.patch
Description: Patch to AccessController

acc.patch
Description: Patch to AccessControlContext

sm.patch
Description: Patch to SecurityManager.