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//$Header: /home/dashley/cvsrep/e3ft_gpl01/e3ft_gpl01/webprojs/fboprime/sw/phplib/perm.inc,v 1.5 2006/07/03 03:46:24 dashley Exp $
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//--------------------------------------------------------------------------------------------------------------
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//perm.inc--FboPrime User Permission String Processing
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//Copyright (C) 2006 David T. Ashley
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//
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//This program is free software; you can redistribute it and/or
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//modify it under the terms of the GNU General Public License
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//as published by the Free Software Foundation; either version 2
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//of the License, or (at your option) any later version.
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//
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//This program is distributed in the hope that it will be useful,
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//but WITHOUT ANY WARRANTY; without even the implied warranty of
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//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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//GNU General Public License for more details.
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//
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//You should have received a copy of the GNU General Public License
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//along with this program; if not, write to the Free Software
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//Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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//-------------------------------------------------------------------------------------------------
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//Copyright 2006 David T. Ashley
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//-------------------------------------------------------------------------------------------------
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//This source code and any program in which it is compiled/used is provided under the GNU GENERAL
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//PUBLIC LICENSE, Version 3, full license text below.
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//-------------------------------------------------------------------------------------------------
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// GNU GENERAL PUBLIC LICENSE
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// Version 3, 29 June 2007
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//
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// Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
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// Everyone is permitted to copy and distribute verbatim copies
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// of this license document, but changing it is not allowed.
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//
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// Preamble
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//
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// The GNU General Public License is a free, copyleft license for
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//software and other kinds of works.
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//
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// The licenses for most software and other practical works are designed
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//to take away your freedom to share and change the works. By contrast,
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//the GNU General Public License is intended to guarantee your freedom to
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//share and change all versions of a program--to make sure it remains free
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//software for all its users. We, the Free Software Foundation, use the
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//GNU General Public License for most of our software; it applies also to
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//any other work released this way by its authors. You can apply it to
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//your programs, too.
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//
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//
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// You may convey a work based on the Program, or the modifications to
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//
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//
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//parts of the aggregate.
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//
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// 6. Conveying Non-Source Forms.
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// You may convey a covered work in object code form under the terms
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// Corresponding Source fixed on a durable physical medium
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// long as you offer spare parts or customer support for that product
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// copy of the Corresponding Source for all the software in the
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// product that is covered by this License, on a durable physical
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// medium customarily used for software interchange, for a price no
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// more than your reasonable cost of physically performing this
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// conveying of source, or (2) access to copy the
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// Corresponding Source from a network server at no charge.
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//
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// c) Convey individual copies of the object code with a copy of the
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// alternative is allowed only occasionally and noncommercially, and
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// only if you received the object code with such an offer, in accord
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// with subsection 6b.
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//
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// d) Convey the object code by offering access from a designated
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// place (gratis or for a charge), and offer equivalent access to the
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// Corresponding Source in the same way through the same place at no
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// further charge. You need not require recipients to copy the
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// Corresponding Source along with the object code. If the place to
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// copy the object code is a network server, the Corresponding Source
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// may be on a different server (operated by you or a third party)
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// that supports equivalent copying facilities, provided you maintain
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// available for as long as needed to satisfy these requirements.
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//
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// e) Convey the object code using peer-to-peer transmission, provided
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// you inform other peers where the object code and Corresponding
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// Source of the work are being offered to the general public at no
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//
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// If, pursuant to or in connection with a single transaction or
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//
|
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// 12. No Surrender of Others' Freedom.
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|
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|
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//
|
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|
579 |
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|
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|
587 |
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|
588 |
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|
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|
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|
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|
599 |
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|
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|
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|
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//
|
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// If the Program specifies that a proxy can decide which future
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|
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|
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|
608 |
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|
609 |
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// Later license versions may give you additional or different
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|
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|
613 |
|
|
//
|
614 |
|
|
// 15. Disclaimer of Warranty.
|
615 |
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//
|
616 |
|
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// THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
|
617 |
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|
618 |
|
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//HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
|
619 |
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|
620 |
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|
621 |
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//PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
|
622 |
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//IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
|
623 |
|
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//ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
|
624 |
|
|
//
|
625 |
|
|
// 16. Limitation of Liability.
|
626 |
|
|
//
|
627 |
|
|
// IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
|
628 |
|
|
//WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
|
629 |
|
|
//THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
|
630 |
|
|
//GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
|
631 |
|
|
//USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
|
632 |
|
|
//DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
|
633 |
|
|
//PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
|
634 |
|
|
//EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
|
635 |
|
|
//SUCH DAMAGES.
|
636 |
|
|
//
|
637 |
|
|
// 17. Interpretation of Sections 15 and 16.
|
638 |
|
|
//
|
639 |
|
|
// If the disclaimer of warranty and limitation of liability provided
|
640 |
|
|
//above cannot be given local legal effect according to their terms,
|
641 |
|
|
//reviewing courts shall apply local law that most closely approximates
|
642 |
|
|
//an absolute waiver of all civil liability in connection with the
|
643 |
|
|
//Program, unless a warranty or assumption of liability accompanies a
|
644 |
|
|
//copy of the Program in return for a fee.
|
645 |
|
|
//
|
646 |
|
|
// END OF TERMS AND CONDITIONS
|
647 |
|
|
//
|
648 |
|
|
// How to Apply These Terms to Your New Programs
|
649 |
|
|
//
|
650 |
|
|
// If you develop a new program, and you want it to be of the greatest
|
651 |
|
|
//possible use to the public, the best way to achieve this is to make it
|
652 |
|
|
//free software which everyone can redistribute and change under these terms.
|
653 |
|
|
//
|
654 |
|
|
// To do so, attach the following notices to the program. It is safest
|
655 |
|
|
//to attach them to the start of each source file to most effectively
|
656 |
|
|
//state the exclusion of warranty; and each file should have at least
|
657 |
|
|
//the "copyright" line and a pointer to where the full notice is found.
|
658 |
|
|
//
|
659 |
|
|
// <one line to give the program's name and a brief idea of what it does.>
|
660 |
|
|
// Copyright (C) <year> <name of author>
|
661 |
|
|
//
|
662 |
|
|
// This program is free software: you can redistribute it and/or modify
|
663 |
|
|
// it under the terms of the GNU General Public License as published by
|
664 |
|
|
// the Free Software Foundation, either version 3 of the License, or
|
665 |
|
|
// (at your option) any later version.
|
666 |
|
|
//
|
667 |
|
|
// This program is distributed in the hope that it will be useful,
|
668 |
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
669 |
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
670 |
|
|
// GNU General Public License for more details.
|
671 |
|
|
//
|
672 |
|
|
// You should have received a copy of the GNU General Public License
|
673 |
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>.
|
674 |
|
|
//
|
675 |
|
|
//Also add information on how to contact you by electronic and paper mail.
|
676 |
|
|
//
|
677 |
|
|
// If the program does terminal interaction, make it output a short
|
678 |
|
|
//notice like this when it starts in an interactive mode:
|
679 |
|
|
//
|
680 |
|
|
// <program> Copyright (C) <year> <name of author>
|
681 |
|
|
// This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
|
682 |
|
|
// This is free software, and you are welcome to redistribute it
|
683 |
|
|
// under certain conditions; type `show c' for details.
|
684 |
|
|
//
|
685 |
|
|
//The hypothetical commands `show w' and `show c' should show the appropriate
|
686 |
|
|
//parts of the General Public License. Of course, your program's commands
|
687 |
|
|
//might be different; for a GUI interface, you would use an "about box".
|
688 |
|
|
//
|
689 |
|
|
// You should also get your employer (if you work as a programmer) or school,
|
690 |
|
|
//if any, to sign a "copyright disclaimer" for the program, if necessary.
|
691 |
|
|
//For more information on this, and how to apply and follow the GNU GPL, see
|
692 |
|
|
//<http://www.gnu.org/licenses/>.
|
693 |
|
|
//
|
694 |
|
|
// The GNU General Public License does not permit incorporating your program
|
695 |
|
|
//into proprietary programs. If your program is a subroutine library, you
|
696 |
|
|
//may consider it more useful to permit linking proprietary applications with
|
697 |
|
|
//the library. If this is what you want to do, use the GNU Lesser General
|
698 |
|
|
//Public License instead of this License. But first, please read
|
699 |
|
|
//<http://www.gnu.org/philosophy/why-not-lgpl.html>.
|
700 |
|
|
//-------------------------------------------------------------------------------------------------
|
701 |
|
|
//********************************************************************************
|
702 |
|
|
//This includes functions used to process user permission strings, and explains
|
703 |
|
|
//the format of permission strings (but not textual descriptions of what the
|
704 |
|
|
//variables mean or the semantics). For explanation of the semantics of the
|
705 |
|
|
//permission string variables, please see permview.inc.
|
706 |
|
|
//--------------------------------------------------------------------------------------------------------------
|
707 |
|
|
require_once("global.inc");
|
708 |
|
|
require_once("strfunc.inc");
|
709 |
|
|
//
|
710 |
|
|
//--------------------------------------------------------------------------------------------------------------
|
711 |
|
|
//Format of an individual permission:
|
712 |
|
|
// a)Begins with a single backslash.
|
713 |
|
|
// b)Followed by at least one letter of either case (parameter names are case-sensitive).
|
714 |
|
|
// c)Followed by aribitrarily many letters and numbers.
|
715 |
|
|
// d)Followed by "=".
|
716 |
|
|
// e)Followed by a quotation mark.
|
717 |
|
|
// f)Followed by the actual parameter--only spaces, letters, hyphens, periods, and numbers are allowed.
|
718 |
|
|
// The empty string is allowed.
|
719 |
|
|
// g)Concluded by another quotation mark.
|
720 |
|
|
//
|
721 |
|
|
//Format of a permission string:
|
722 |
|
|
// a)Simple concatenation of aribitrarily many individual permissions as described above.
|
723 |
|
|
//
|
724 |
|
|
//The format in general is designed for rapid search. The string functions will find parameter
|
725 |
|
|
//names quite quickly.
|
726 |
|
|
//--------------------------------------------------------------------------------------------------------------
|
727 |
|
|
//Retrieves the value of a parameter within a string, or FALSE if the parameter does not
|
728 |
|
|
//exist in the string.
|
729 |
|
|
//
|
730 |
|
|
//The permission string must be properly formatted.
|
731 |
|
|
//
|
732 |
|
|
//Unit-tested 20060427.
|
733 |
|
|
//
|
734 |
|
|
function PERM_get_val_from_string($permstring, $permname)
|
735 |
|
|
{
|
736 |
|
|
$idx = strpos($permstring, "\\" . $permname . "=");
|
737 |
|
|
|
738 |
|
|
if ($idx === FALSE)
|
739 |
|
|
{
|
740 |
|
|
//Value not found. Indicate this to the caller with FALSE.
|
741 |
|
|
return(FALSE);
|
742 |
|
|
}
|
743 |
|
|
else
|
744 |
|
|
{
|
745 |
|
|
//Value was found.
|
746 |
|
|
$len = strlen($permstring); //Record the length for efficiency.
|
747 |
|
|
|
748 |
|
|
//Grab the offset of the two quotes following the parameter name.
|
749 |
|
|
$q1pos = FALSE;
|
750 |
|
|
$q2pos = FALSE;
|
751 |
|
|
$q1pos = strpos($permstring, "\"", $idx);
|
752 |
|
|
if (($q1pos !== FALSE) && ($q1pos < ($len-1)))
|
753 |
|
|
$q2pos = strpos($permstring, "\"", $q1pos + 1);
|
754 |
|
|
|
755 |
|
|
//Return the appropriate result.
|
756 |
|
|
if (($q1pos !== FALSE) && ($q2pos !== FALSE))
|
757 |
|
|
{
|
758 |
|
|
//We have a properly-quoted result. Return it.
|
759 |
|
|
return(SubStr($permstring, $q1pos+1, $q2pos-$q1pos-1));
|
760 |
|
|
}
|
761 |
|
|
else
|
762 |
|
|
{
|
763 |
|
|
//Something went wrong. Return FALSE.
|
764 |
|
|
return(FALSE);
|
765 |
|
|
}
|
766 |
|
|
}
|
767 |
|
|
}
|
768 |
|
|
//
|
769 |
|
|
//--------------------------------------------------------------------------------------------------------------
|
770 |
|
|
//Splits a permission string into its components, and returns an associative array containing the permission
|
771 |
|
|
//string names as the keys and the values as the elements.
|
772 |
|
|
//
|
773 |
|
|
//If there are no permissions in the string, returns FALSE.
|
774 |
|
|
//
|
775 |
|
|
//The string should be a properly-formatted permission string.
|
776 |
|
|
//
|
777 |
|
|
//If the are multiple entries in the string, the later value will be written
|
778 |
|
|
//over the earlier one in the associative array.
|
779 |
|
|
//
|
780 |
|
|
//Unit-tested 20060427.
|
781 |
|
|
//
|
782 |
|
|
function PERM_split_aa($arg)
|
783 |
|
|
{
|
784 |
|
|
$temp = explode("\\", $arg);
|
785 |
|
|
|
786 |
|
|
if ($temp === FALSE)
|
787 |
|
|
{
|
788 |
|
|
return(FALSE);
|
789 |
|
|
}
|
790 |
|
|
else if (count($temp) == 0)
|
791 |
|
|
{
|
792 |
|
|
return(FALSE);
|
793 |
|
|
}
|
794 |
|
|
else
|
795 |
|
|
{
|
796 |
|
|
$putidx = 0;
|
797 |
|
|
|
798 |
|
|
for ($i=0; $i<count($temp); $i++)
|
799 |
|
|
{
|
800 |
|
|
$val = $temp[$i];
|
801 |
|
|
$len = strlen($val);
|
802 |
|
|
|
803 |
|
|
if ($len >= 4)
|
804 |
|
|
{
|
805 |
|
|
$q1pos = FALSE;
|
806 |
|
|
$q2pos = FALSE;
|
807 |
|
|
$q1pos = strpos($val, "\"");
|
808 |
|
|
if (($q1pos !== FALSE) && ($q1pos < ($len-1)))
|
809 |
|
|
$q2pos = strpos($val, "\"", $q1pos + 1);
|
810 |
|
|
|
811 |
|
|
if (($q1pos !== FALSE) && ($q2pos !== FALSE) && ($q1pos >= 2))
|
812 |
|
|
{
|
813 |
|
|
$rv[SubStr($val, 0, $q1pos-1)] = SubStr($val, $q1pos+1, $q2pos-$q1pos-1);
|
814 |
|
|
$putidx++;
|
815 |
|
|
}
|
816 |
|
|
}
|
817 |
|
|
}
|
818 |
|
|
|
819 |
|
|
//Unless we couldn't find anything seemingly valid, return the array.
|
820 |
|
|
if ($putidx > 0)
|
821 |
|
|
return($rv);
|
822 |
|
|
else
|
823 |
|
|
return(FALSE);
|
824 |
|
|
}
|
825 |
|
|
}
|
826 |
|
|
//
|
827 |
|
|
//--------------------------------------------------------------------------------------------------------------
|
828 |
|
|
//Recombines a permission string that has been split from an associative array into a permission string.
|
829 |
|
|
//No hard error checking is performed, i.e. array names with invalid characters or strings with invalid
|
830 |
|
|
//characters will slip through in the interest of speed.
|
831 |
|
|
//
|
832 |
|
|
function PERM_combine_aa($arg)
|
833 |
|
|
{
|
834 |
|
|
$rv = "";
|
835 |
|
|
|
836 |
|
|
reset($arg);
|
837 |
|
|
while (list($key, $val) = each($arg))
|
838 |
|
|
{
|
839 |
|
|
$rv = $rv . "\\" . $key . "=\"" . $val . "\"";
|
840 |
|
|
}
|
841 |
|
|
|
842 |
|
|
return($rv);
|
843 |
|
|
}
|
844 |
|
|
//
|
845 |
|
|
//--------------------------------------------------------------------------------------------------------------
|
846 |
|
|
//Recombines a permission string that has been split from an associative array into a permission string.
|
847 |
|
|
//All invalid characters are stripped from both key names and values (and empty keys are dropped), leading
|
848 |
|
|
//to a guaranteed valid permission string. This function is naturally slower than the function above because
|
849 |
|
|
//of the error checking.
|
850 |
|
|
//
|
851 |
|
|
function PERM_combine_aa_error_trap($arg)
|
852 |
|
|
{
|
853 |
|
|
$rv = "";
|
854 |
|
|
|
855 |
|
|
//Since we're doing an expensive operation, might as well sort the array, too.
|
856 |
|
|
ksort($arg);
|
857 |
|
|
|
858 |
|
|
reset($arg);
|
859 |
|
|
while (list($key, $val) = each($arg))
|
860 |
|
|
{
|
861 |
|
|
if (strlen($key) > 0) //Don't want to go further if key is empty.
|
862 |
|
|
{
|
863 |
|
|
//Force the string into numbers and letters for the key.
|
864 |
|
|
$key = STRFUNC_force_into_subset($key, "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ");
|
865 |
|
|
|
866 |
|
|
//It is still possible that the first character is a digit, which is a no-no.
|
867 |
|
|
//Rip characters off the string until we have either a letter or an empty string.
|
868 |
|
|
while ((strlen($key) > 0) && (strpos("0123456789", SubStr($key, 0, 1)) !== FALSE))
|
869 |
|
|
{
|
870 |
|
|
$key = SubStr($key, 1, strlen($key) - 1); //Rip the character off the front.
|
871 |
|
|
}
|
872 |
|
|
|
873 |
|
|
//If we have an empty string, don't proceed.
|
874 |
|
|
if (strlen($key) > 0)
|
875 |
|
|
{
|
876 |
|
|
//Force the value into the allowable character set.
|
877 |
|
|
$val = STRFUNC_force_into_subset($val, " abcdefghijklmnopqrstuvwxyz-.ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789");
|
878 |
|
|
|
879 |
|
|
//Add to the string.
|
880 |
|
|
$rv = $rv . "\\" . $key . "=\"" . $val . "\"";
|
881 |
|
|
}
|
882 |
|
|
}
|
883 |
|
|
}
|
884 |
|
|
|
885 |
|
|
return($rv);
|
886 |
|
|
}
|
887 |
|
|
//
|
888 |
|
|
//--------------------------------------------------------------------------------------------------------------
|
889 |
|
|
//Forces a permission string into valid space.
|
890 |
|
|
//
|
891 |
|
|
//This can be done inefficiently by just splitting and then recombining.
|
892 |
|
|
//
|
893 |
|
|
//Unit-tested 20060427.
|
894 |
|
|
//
|
895 |
|
|
function PERM_force_into_valid_space($arg)
|
896 |
|
|
{
|
897 |
|
|
$splitval = PERM_split_aa($arg); //Split it.
|
898 |
|
|
$rv = PERM_combine_aa_error_trap($splitval); //Recombine it.
|
899 |
|
|
|
900 |
|
|
//Return value to caller.
|
901 |
|
|
return($rv);
|
902 |
|
|
}
|
903 |
|
|
//
|
904 |
|
|
//--------------------------------------------------------------------------------------------------------------
|
905 |
|
|
//End of $RCSfile: perm.inc,v $.
|
906 |
|
|
//--------------------------------------------------------------------------------------------------------------
|
907 |
|
|
?>
|