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1 <?php
2 //$Header: /home/dashley/cvsrep/e3ft_gpl01/e3ft_gpl01/webprojs/fboprime/sw/phplib/par.inc,v 1.9 2006/08/01 21:51:46 dashley Exp $
3 //********************************************************************************
4 //par.inc--FboPrime Parameter and Cookie Processing
5 //Copyright (C) 2006 David T. Ashley
6 //
7 //This program is free software; you can redistribute it and/or
8 //modify it under the terms of the GNU General Public License
9 //as published by the Free Software Foundation; either version 2
10 //of the License, or (at your option) any later version.
11 //
12 //This program is distributed in the hope that it will be useful,
13 //but WITHOUT ANY WARRANTY; without even the implied warranty of
14 //MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 //GNU General Public License for more details.
16 //
17 //You should have received a copy of the GNU General Public License
18 //along with this program; if not, write to the Free Software
19 //Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
20 //-------------------------------------------------------------------------------------------------
21 //Copyright 2006 David T. Ashley
22 //-------------------------------------------------------------------------------------------------
23 //This source code and any program in which it is compiled/used is provided under the GNU GENERAL
24 //PUBLIC LICENSE, Version 3, full license text below.
25 //-------------------------------------------------------------------------------------------------
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571 //License and any other pertinent obligations, then as a consequence you may
572 //not convey it at all. For example, if you agree to terms that obligate you
573 //to collect a royalty for further conveying from those to whom you convey
574 //the Program, the only way you could satisfy both those terms and this
575 //License would be to refrain entirely from conveying the Program.
576 //
577 // 13. Use with the GNU Affero General Public License.
578 //
579 // Notwithstanding any other provision of this License, you have
580 //permission to link or combine any covered work with a work licensed
581 //under version 3 of the GNU Affero General Public License into a single
582 //combined work, and to convey the resulting work. The terms of this
583 //License will continue to apply to the part which is the covered work,
584 //but the special requirements of the GNU Affero General Public License,
585 //section 13, concerning interaction through a network will apply to the
586 //combination as such.
587 //
588 // 14. Revised Versions of this License.
589 //
590 // The Free Software Foundation may publish revised and/or new versions of
591 //the GNU General Public License from time to time. Such new versions will
592 //be similar in spirit to the present version, but may differ in detail to
593 //address new problems or concerns.
594 //
595 // Each version is given a distinguishing version number. If the
596 //Program specifies that a certain numbered version of the GNU General
597 //Public License "or any later version" applies to it, you have the
598 //option of following the terms and conditions either of that numbered
599 //version or of any later version published by the Free Software
600 //Foundation. If the Program does not specify a version number of the
601 //GNU General Public License, you may choose any version ever published
602 //by the Free Software Foundation.
603 //
604 // If the Program specifies that a proxy can decide which future
605 //versions of the GNU General Public License can be used, that proxy's
606 //public statement of acceptance of a version permanently authorizes you
607 //to choose that version for the Program.
608 //
609 // Later license versions may give you additional or different
610 //permissions. However, no additional obligations are imposed on any
611 //author or copyright holder as a result of your choosing to follow a
612 //later version.
613 //
614 // 15. Disclaimer of Warranty.
615 //
616 // THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
617 //APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
618 //HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
619 //OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
620 //THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
621 //PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
622 //IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
623 //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 file contains functions that carefully control GET/POST input parameters
703 //and cookies and bring them into the global variable space.
704 //
705 //The most conservative approach is to restrict such parameters to a language,
706 //i.e. to confine the form they may have.
707 //--------------------------------------------------------------------------------
708 require_once("strfunc.inc");
709 //
710 //--------------------------------------------------------------------------------
711 //FULL LIST OF COOKIE PARAMETERS
712 //------------------------------
713 //Only one cookie is issued by this software, named "fbopsid". This is a session
714 //identifier as described in the documentation. The cookie is issued on a
715 //successful login and revoked when a session times out or there is an
716 //authentication failure.
717 //
718 //--------------------------------------------------------------------------------
719 //FULL LIST OF GET/POST PARAMETERS
720 //--------------------------------
721 //This is the list of get/post parameters. They are named uniquely to avoid
722 //confusion or mistakes. In general, a script will try to import only those
723 //parameters that it is interested in--others are ignored.
724 //
725 //GET and POST parameters are usually treated identically--there is no
726 //differentiation made. This means in some cases it is possible to modify page
727 //behavior (for example, page appearance) by adding a string to the URL (i.e. to
728 //use a URL not directly generated by the software). This allows power-users
729 //to sometimes work more effectively.
730 //
731 //GET parameters are preferentially used, as they allow URLs to be bookmarked
732 //and e-mailed.
733 //
734 //index.php -- Main scheduler day view.
735 //-------------------------------------
736 // authuserid
737 // The login name of the user. For example, "jsmith". Login names
738 // must begin with a letter, must be 20 characters or less, and may
739 // contain only letters and numbers. Login names are converted to
740 // all lower-case, and they are treated as case-insensitive.
741 //
742 // Any supplied parameter has blanks and invalid characters removed
743 // before being assigned to the global variable. In some cases,
744 // a login name consisting of exclusively blanks or invalid characters
745 // may be assigned to the global variable as the empty string.
746 //
747 // If the login name is not supplied, the corresponding global
748 // variable is set to FALSE.
749 //
750 // authuserpasswd
751 // The password supplied by the user to authenticate. Passwords
752 // may contain only certain characters, no spaces at the ends, etc.
753 //
754 // Any supplied parameter has blanks and invalid characters removed
755 // before being assigned to the global variable. In some cases,
756 // password consisting of exclusively blanks or invalid characters
757 // may be assigned to the global variable as the empty string.
758 //
759 // If the password is not supplied, the corresponding global
760 // variable is set to FALSE.
761 //
762 // logout
763 // If the main scheduling page is invoked with a get or post
764 // parameter of "logout" defined to _any_ value, this is a cue
765 // to log out the user. The traditional value is logout=1.
766 //
767 // A user is logged out by linking to the main scheduling page
768 // with the "logout" parameter set.
769 //
770 // sddt
771 // The date whose scheduling information will be displayed.
772 //
773 // If no date is supplied, the default is usually the current
774 // calendar day.
775 //
776 // The date is in the format YYYYMMDD, for example,
777 //
778 // "20060408".
779 //
780 // Any supplied parameter has blanks and invalid characters removed
781 // before being assigned to the global variable. In some cases,
782 // a date consisting of exclusively blanks or invalid characters
783 // may be assigned to the global variable as the empty string.
784 //
785 // If the date is not supplied, the corresponding global
786 // variable is set to FALSE.
787 //
788 // sdtim
789 // The time of day for which scheduling information should be
790 // displayed.
791 //
792 // If no time of day is supplied, the default is usually
793 // the default panel for scheduling views.
794 //
795 // The time is in the format "HHMMSS", for example,
796 //
797 // "1519".
798 //
799 // The time should range from "0000" through "2359". "2400" is
800 // illegal, as it would actually correspond to midnight of the
801 // following day.
802 //
803 // Any supplied parameter has blanks and invalid characters removed
804 // before being assigned to the global variable. In some cases,
805 // a date consisting of exclusively blanks or invalid characters
806 // may be assigned to the global variable as the empty string.
807 //
808 // If the date is not supplied, the corresponding global
809 // variable is set to FALSE.
810 //
811 // todaynow
812 // If set to any value (i.e. if it exists), the global variable is
813 // set to TRUE, otherwise, it is set to FALSE. Signals that current
814 // server time should be used (all get/post parameters and session
815 // state should be ignored).
816 //
817 // menulvladjst
818 // If present, indicates to adjust the current menu level (stored in
819 // the session record of the database) up or down. Parameter values
820 // allowed:
821 // "D" (or "d") : Decrement the current menu level (corresponding
822 // to fewer options displayed).
823 // "U" (or "u") : Increment the current menu level (corresponding
824 // to more options displayed).
825 //
826 // acklevel
827 // Used for acknowledgement screens in various contexts, to trigger
828 // an acknowledgement screen rather than the main action. This should
829 // be an integer in the range of [0,100] with semantics defined by
830 // the using page. If the parameter is missing or invalid, $PAR_acklevel
831 // is assigned FALSE.
832 //
833 //--------------------------------------------------------------------------------
834 //Obtains the FBOPSID cookie parameter and assigns it to a global variable.
835 //FALSE is assigned if the parameter is not passed. Invalid characters are
836 //removed, possibly leading to the empty string if the passed entity is empty or
837 //contains only invalid characters.
838 //
839 function PAR_get_fbopsid()
840 {
841 global $PAR_fbopsid;
842
843 if (! isset($_COOKIE["fbopsid"]))
844 {
845 $PAR_fbopsid = FALSE;
846 return;
847 }
848 else
849 {
850 $PAR_fbopsid = $_COOKIE["fbopsid"];
851 }
852
853 //Trim the string down to the characters allowed for a session identifier.
854 $PAR_fbopsid = STRFUNC_force_into_subset($PAR_fbopsid, "SGIABCDEF0123456789");
855
856 //The total string may be no longer than 66 characters long.
857 if (strlen($PAR_fbopsid) > 66)
858 {
859 $PAR_fbopsid = SubStr($PAR_fbopsid, 0, 66);
860 }
861 }
862 //
863 //
864 //--------------------------------------------------------------------------------
865 //Obtains the AUTHUSERID and assigns it into a global variable. FALSE is
866 //assigned if the parameter is not passed. Invalid characters are removed,
867 //possibly leading to the empty string if the passed entity is empty or
868 //contains only invalid characters.
869 //
870 //Unit-tested on 20060408.
871 //
872 function PAR_get_authuserid()
873 {
874 global $PAR_authuserid;
875
876 if ((! isset($_GET["authuserid"])) && (! isset($_POST["authuserid"])))
877 {
878 $PAR_authuserid = FALSE;
879 return;
880 }
881 else if (isset($_POST["authuserid"]))
882 {
883 $starting_point = $_POST["authuserid"];
884 }
885 else if (isset($_GET["authuserid"]))
886 {
887 $starting_point = $_GET["authuserid"];
888 }
889
890 //Trim all disallowed characters.
891 $starting_point
892 = STRFUNC_force_into_subset($starting_point,
893 "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789");
894
895 //Force the string to be all lower case.
896 $starting_point = StrToLower($starting_point);
897
898 //If the string is now of zero length, treat this parameter
899 //as not existing.
900 if (strlen($starting_point) == 0)
901 {
902 $PAR_authuserid = FALSE;
903 return;
904 }
905
906 //And assign to the global, which we may be just newly creating.
907 $PAR_authuserid = $starting_point;
908 }
909 //
910 //
911 //--------------------------------------------------------------------------------
912 //Obtains the AUTHUSERPASSWD and assigns it into a global variable. FALSE is
913 //assigned if the parameter is not passed. Invalid characters are removed,
914 //possibly leading to the empty string if the passed entity is empty or
915 //contains only invalid characters.
916 //
917 //Passwords are not trimmed here. The password is never displayed (so HTML
918 //encoded scripting attacks, etc. shouldn't be possible), and it is better
919 //if downstream software can parse it and potentially display error
920 //messages.
921 //
922 //Passwords will only be accepted as a POST parameter (they should not be
923 //on the command line.
924 //
925 function PAR_get_authuserpasswd()
926 {
927 global $PAR_authuserpasswd;
928
929 if (! isset($_POST["authuserpasswd"]))
930 {
931 $PAR_authuserpasswd = FALSE;
932 return;
933 }
934
935 $PAR_authuserpasswd = $_POST["authuserpasswd"];
936 }
937 //
938 //
939 //--------------------------------------------------------------------------------
940 //Obtains the SDDT and assigns it into a global variable. FALSE is
941 //assigned if the parameter is not passed. Invalid characters are removed,
942 //possibly leading to the empty string if the passed entity is empty or
943 //contains only invalid characters.
944 //
945 //Unit-tested on 20060408.
946 //
947 function PAR_get_sddt()
948 {
949 global $PAR_sddt;
950
951 if ((! isset($_GET["sddt"])) && (! isset($_POST["sddt"])))
952 {
953 $PAR_sddt = FALSE;
954 return;
955 }
956 else if (isset($_POST["sddt"]))
957 {
958 $starting_point = $_POST["sddt"];
959 }
960 else if (isset($_GET["sddt"]))
961 {
962 $starting_point = $_GET["sddt"];
963 }
964
965 //Trim all disallowed characters.
966 $starting_point
967 = STRFUNC_force_into_subset($starting_point,
968 "0123456789");
969
970 //And assign to the global, which we may be just newly creating.
971 $PAR_sddt = $starting_point;
972 }
973 //
974 //
975 //--------------------------------------------------------------------------------
976 //Obtains the SDTIM and assigns it into a global variable. FALSE is
977 //assigned if the parameter is not passed. Invalid characters are removed,
978 //possibly leading to the empty string if the passed entity is empty or
979 //contains only invalid characters.
980 //
981 //Unit-tested on 20060408.
982 //
983 function PAR_get_sdtim()
984 {
985 global $PAR_sdtim;
986
987 if ((! isset($_GET["sdtim"])) && (! isset($_POST["sdtim"])))
988 {
989 $PAR_sdtim = FALSE;
990 return;
991 }
992 else if (isset($_POST["sdtim"]))
993 {
994 $starting_point = $_POST["sdtim"];
995 }
996 else if (isset($_GET["sdtim"]))
997 {
998 $starting_point = $_GET["sdtim"];
999 }
1000
1001 //Trim all disallowed characters.
1002 $starting_point
1003 = STRFUNC_force_into_subset($starting_point,
1004 "0123456789");
1005
1006 //And assign to the global, which we may be just newly creating.
1007 $PAR_sdtim = $starting_point;
1008 }
1009 //
1010 //
1011 //--------------------------------------------------------------------------------
1012 //Obtains the TODAYNOW and assigns it into a global variable. TRUE is assigned
1013 //if ANY value is present for the variable, or FALSE otherwise.
1014 //
1015 function PAR_get_todaynow()
1016 {
1017 global $PAR_todaynow;
1018
1019 if ((isset($_GET["todaynow"])) || (isset($_POST["todaynow"])))
1020 {
1021 $PAR_todaynow = TRUE;
1022 }
1023 else
1024 {
1025 $PAR_todaynow = FALSE;
1026 }
1027 }
1028 //
1029 //
1030 //--------------------------------------------------------------------------------
1031 //Obtains the MENULVLADJST and assigns it into a global variable as either:
1032 // FALSE if the parameter is not passed.
1033 // -1 if the menu level is to be decremented.
1034 // 1 if the menu level is to be incremented.
1035 //
1036 function PAR_get_menulvladjst()
1037 {
1038 global $PAR_menulvladjst;
1039
1040 if ((! isset($_GET["menulvladjst"])) && (! isset($_POST["menulvladjst"])))
1041 {
1042 $PAR_menulvladjst = FALSE;
1043 return;
1044 }
1045 else if (isset($_POST["menulvladjst"]))
1046 {
1047 $starting_point = $_POST["menulvladjst"];
1048 }
1049 else if (isset($_GET["menulvladjst"]))
1050 {
1051 $starting_point = $_GET["menulvladjst"];
1052 }
1053
1054 //Trim all disallowed characters.
1055 $starting_point = STRFUNC_force_into_subset($starting_point, "uUdD");
1056
1057 //And assign to the global, which we may be just newly creating.
1058 if (($starting_point == "d") || ($starting_point == "D"))
1059 $PAR_menulvladjst = -1;
1060 else if (($starting_point == "u") || ($starting_point == "U"))
1061 $PAR_menulvladjst = 1;
1062 else
1063 $PAR_menulvladjst = FALSE;
1064 }
1065 //
1066 //
1067 //--------------------------------------------------------------------------------
1068 //Obtains the LOGOUT parameter. If this parameter is set to ANY value,
1069 //it is a cue to log out the user.
1070 //
1071 function PAR_get_logout()
1072 {
1073 global $PAR_logout;
1074
1075 if ((! isset($_GET["logout"])) && (! isset($_POST["logout"])))
1076 {
1077 $PAR_logout = FALSE;
1078 }
1079 else
1080 {
1081 $PAR_logout = TRUE;
1082 }
1083 }
1084 //
1085 //
1086 //--------------------------------------------------------------------------------
1087 //Obtains the ACKLEVEL and assigns it into a global variable as an integer.
1088 //FALSE is assigned if the parameter is not passed or if it is passed but is
1089 //invalid.
1090 //
1091 function PAR_get_acklevel()
1092 {
1093 global $PAR_acklevel;
1094
1095 if ((! isset($_GET["acklevel"])) && (! isset($_POST["acklevel"])))
1096 {
1097 $PAR_acklevel = FALSE;
1098 return;
1099 }
1100 else if (isset($_POST["acklevel"]))
1101 {
1102 $starting_point = $_POST["acklevel"];
1103 }
1104 else if (isset($_GET["acklevel"]))
1105 {
1106 $starting_point = $_GET["acklevel"];
1107 }
1108
1109 //Trim all disallowed characters.
1110 $starting_point = STRFUNC_force_into_subset($starting_point, "0123456789");
1111
1112 //Remove any leading zeros.
1113 while ((strlen($starting_point) > 1) && (SubStr($starting_point, 0, 1) == "0"))
1114 $starting_point = SubStr($starting_point, 1);
1115
1116 //At this point, the value can't help but syntactically be an integer or the
1117 //empty string.
1118 if (strlen($starting_point) == 0)
1119 {
1120 $PAR_acklevel = FALSE; //Empty string.
1121 }
1122 else if (strlen($starting_point) > 2)
1123 {
1124 $PAR_acklevel = FALSE; //Too big as an integer.
1125 }
1126 else
1127 {
1128 $starting_point = (int)$starting_point;
1129 if (($starting_point >= 0) && ($starting_point <= 100))
1130 {
1131 $PAR_acklevel = $starting_point;
1132 }
1133 else
1134 {
1135 $PAR_acklevel = FALSE; //Out of range as an integer.
1136 }
1137 }
1138 }
1139 //
1140 //
1141 //--------------------------------------------------------------------------------
1142 //End of $RCSfile: par.inc,v $.
1143 //--------------------------------------------------------------------------------
1144 ?>

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