[PATCH] fix for ext/phar openssl signature verification in tar archives

Hi, I just discovered two critical errors in tar's signature verification handling that affects archives signed with an openssl signature. The attached patch fixes these issues, and adds a test for the openssl functionality (this slipped through the cracks somehow). This is an important issue for anyone who wants to create true signed archives with ext/phar, and so I hope it will make it into 5.3.0. If it is too late, I would at least want the patch to tar.c to be in the release notes if at all possible. The patch attached is against PHP_5_3, and is a trivial one to merge to HEAD and pecl/phar. Can I commit? Thanks, Greg