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/*
* encryption and decryption algorythm class
* for use in any database
*
* use hash of 10 characters and XOR comparison with password
* to convert ASCII to DEC to HEX
* and back again
*
* change hash
* AJR Nov 3, 2003
*
*/

class EncDec{

var $hash;

function hexToInt($s, $i)
{

(int)$j = $i * 2;
(string)$s1 = $s;
(string)$c = substr($s1, $j, 1); // get the char at position $j, length 1
(string)$c1 = substr($s1, $j+1, 1); // get the char at postion $j + 1, length 1
(int)$k = 0;

switch ($c)
{

case "A":
$k += 160;
break;

case "B":
$k += 176;
break;

case "C":
$k += 192;
break;

case "D":
$k += 208;
break;

case "E":
$k += 224;
break;

case "F":
$k += 240;
break;

case " ":
$k += 0;
break;

default:

(int)$k = $k + (16 * (int)$c);
break;
}

switch ($c1)
{

case "A":
$k += 10;
break;

case "B":
$k += 11;
break;

case "C":
$k += 12;
break;

case "D":
$k += 13;
break;

case "E":
$k += 14;
break;

case "F":
$k += 15;
break;

case " ":
$k += 0;
break;

default:

$k += (int)$c1;
break;
}

return $k;
}

function hexToIntArray($s)
{
(string)$s1 = $s;
(int)$i = strlen($s1);
(int)$j = $i / 2;
for($l = 0; $l < $j; $l++)
{
(int)$k = $this->hexToInt($s1,$l);
$ai[$l] = $k;
}

return $ai;
}

function charToInt($c)
{
$ac[0] = $c;
return $ac;
}

function xorString($ai)
{
$s = $this->hash; //
(int)$i = strlen($s);
$ai1 = $ai;
(int)$j = count($ai1);
for($i = 0; $i < $j; $i = strlen($s))
$s = $s.$s;

for($k = 0; $k < $j; $k++)
{
(string)$c = substr($s,$k,1);
$ac[$k] = chr($ai1[$k] ^ ord($c));
}

(string)$s1 = implode('', $ac);
return $s1;
}

function phpDecrypt($s)
{
{
$ai = $this->hexToIntArray($s);
(string)$s1 = $this->xorString($ai);
return $s1;
}
}

function intToHex($i)
{
(int)$j = (int)$i / 16;
if ((int)$j == 0) {
(string)$s = " ";
}
else
{
(string)$s = strtoupper(dechex($j));
}
(int)$k = (int)$i - (int)$j * 16;
(string)$s = $s.strtoupper(dechex($k));

return $s;
}

function xorCharString($s)
{
$ac = preg_split('//', $s, -1, PREG_SPLIT_NO_EMPTY);
(string)$s1 = $this->hash;
(int)$i = strlen($s1);
(int)$j = count($ac);
for($i=0; $i < $j; $i = strlen($s1))
{
$s1 = $s1.$s1;
}

for($k = 0; $k < $j; $k++)
{
$c = substr($s1,$k,1);
$ai[$k] = ord($c) ^ ord($ac[$k]);
}

return $ai;
}

function phpEncrypt($s)
{
$ai = $this->xorCharString($s);
$s1 = "";
for($i = 0; $i < count($ai); $i++)
$s1 = $s1.$this->intToHex((int)$ai[$i]);
return $s1;
}

}
/*
*
* end of class declaration
*
*
*/
?>

<?

//*
// contacts_menu.php
// Contacts Section
// Main Menu
//*

//Check if contact is logged in
session_start();
if(!isset($_SESSION['UserID']) || $_SESSION['UserType'] != "C")
{
header ("Location: index.php?action=notauth");
exit;
}

//Inizialize databse functions
include_once "ez_sql.php";
//Include global functions
include_once "common.php";
//Include Crypt class
include_once "classCrypt.php";
// config
include_once "configuration.php";

$cfname=$_SESSION['cfname'];
$clname=$_SESSION['clname'];
$cid=$_SESSION['UserID'];

//Get message to display
$msgparents=$db->get_var("SELECT messageto_parents FROM tbl_config WHERE id=1");
//Get allowed students for contact
$sSQL="SELECT studentbio.studentbio_fname, studentbio.studentbio_lname, contact_to_students.contact_to_students_student FROM studentbio INNER JOIN contact_to_students ON studentbio.studentbio_id = contact_to_students.contact_to_students_student where contact_to_students.contact_to_students_contact=$cid AND contact_to_students.contact_to_students_internet=1";
$students=$db->get_results($sSQL);
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html dir="rtl" xmlns="http://www.w3.org/1999/xhtml">

<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<title><?php echo "School Management System";?></title>
<style type="text/css" media="all">@import "student-contact.css";</style>
<link rel="icon" href="favicon.ico" type="image/x-icon"><link rel="shortcut icon" href="favicon.ico" type="image/x-icon"><script type="text/javascript" language="JavaScript" src="sms.js"></script>
</head>

<body>
<img src="images/<?php echo _LOGO?>" border="0">
<div id="Header">
<table width="100%">
<tr>
<td width="50%" align="left"><font size="2">  <?php echo date("l F j, Y"); ?></font></td>
<td width="50%"><?php echo "Welcome";?>, <?php echo $cfname. " " .$clname; ?></td>
</tr>
</table>
</div>
<div id="Content">
<h1><?php echo "Parents Menu";?></h1>
<p><?php echo "Please choose a student";?></p>
<br>
<?php
if ($students) {
foreach($students as $student){
$keys="SMS-".$student->contact_to_students_student;
$crpt = &New EncDec;
$crpt->hash="nscegfbzucbrfzugrfzugcr";
$studentid=$crpt->phpEncrypt($keys);

?>
<a href="contacts_set_student.php?studentid=<?php echo $studentid; ?>" class="aform"><?echo $student->studentbio_fname. " " .$student->studentbio_lname; ?></a><br>
<?php
};
}
?>
<hr>
<p class="msgdisplay"><?php echo $msgparents; ?></p>
</div>
<?php include "contact_menu.inc.php"; ?>
</body>

</html>

<?php

$time = time();
require('I18N/Arabic.php');
$Ar = new I18N_Arabic('Date');
$Ar->setMode(6);

date_default_timezone_set('UTC');

<? echo $Ar->date('l dS F Y ', $time); ?>

<tr>
<td width="50%" align="left"><font size="2">  <?php echo $date; ?></font></td>
<td width="50%"><?php echo _ADMIN_ADD_STUDENT_2_UPPER?></td>
</tr>
</table>

<table width="100%">

$time = time();
require('includes/I18N/Arabic.php');
$Ar = new I18N_Arabic('Date');
$Ar->setMode(6);
$date= $Ar->date('l dS F Y ', $time);

date_default_timezone_set('UTC');