<?php
// -----------------------------------------------
// Cryptographp v1.4
// (c) 2006-2007 Sylvain BRISON
//
// www.cryptographp.com
// cryptographp@alphpa.com
//
// Licence CeCILL modifi?e
// => Voir fichier Licence_CeCILL_V2-fr.txt)
// -----------------------------------------------
error_reporting(E_ALL ^ E_NOTICE);
srand((double)microtime()*1000000);
if ((!isset($_COOKIE['cryptcookietest'])) and ($_GET[$_GET['sn']]==""))
{
header("Content-type: image/png");
readfile('images/erreur3.png');
exit;
}
if ($_GET[$_GET['sn']]=="") unset ($_GET['sn']);
session_start();
// N'accepte que les fichiers de config du meme r?pertoire
if (is_file($_GET['cfg']) and dirname($_GET['cfg'])=='.' ) $_SESSION['configfile']=$_GET['cfg'];
else $_SESSION['configfile']="cryptographp.cfg.php";
include($_SESSION['configfile']);
// V?rifie si l'utilisateur a le droit de (re)g?n?rer un cryptogramme
if ($_SESSION['cryptcptuse']>=$cryptusemax) {
header("Content-type: image/png");
readfile('images/erreur1.png');
exit;
}
$delai = time()-$_SESSION['crypttime'];
if ($delai < $cryptusetimer) {
switch ($cryptusertimererror) {
case 2 : header("Content-type: image/png");
readfile('images/erreur2.png');
exit;
case 3 : sleep ($cryptusetimer-$delai);
break; // Fait une pause
case 1 :
default : exit; // Quitte le script sans rien faire
}
}
// Cr?ation du cryptogramme temporaire
$imgtmp = imagecreatetruecolor($cryptwidth,$cryptheight);
$blank = imagecolorallocate($imgtmp,255,255,255);
$black = imagecolorallocate($imgtmp,0,0,0);
imagefill($imgtmp,0,0,$blank);
$word ='';
$x = 10;
$pair = rand(0,1);
$charnb = rand($charnbmin,$charnbmax);
for ($i=1;$i<= $charnb;$i++) {
$tword[$i]['font'] = $tfont[array_rand($tfont,1)];
$tword[$i]['angle'] = (rand(1,2)==1)?rand(0,$charanglemax):rand(360-$charanglemax,360);
if ($crypteasy) $tword[$i]['element'] =(!$pair)?$charelc{rand(0,strlen($charelc)-1)}:$charelv{rand(0,strlen($charelv)-1)};
else $tword[$i]['element'] = $charel{rand(0,strlen($charel)-1)};
$pair=!$pair;
$tword[$i]['size'] = rand($charsizemin,$charsizemax);
$tword[$i]['y'] = ($charup?($cryptheight/2)+rand(0,($cryptheight/5)):($cryptheight/1.5));
$word .=$tword[$i]['element'];
$lafont="fonts/".$tword[$i]['font'];
imagettftext($imgtmp,$tword[$i]['size'],$tword[$i]['angle'],$x,$tword[$i]['y'],$black,$lafont,$tword[$i]['element']);
$x +=$charspace;
}
// Calcul du racadrage horizontal du cryptogramme temporaire
$xbegin=0;
$x=0;
while (($x<$cryptwidth)and(!$xbegin)) {
$y=0;
while (($y<$cryptheight)and(!$xbegin)) {
if (imagecolorat($imgtmp,$x,$y) != $blank) $xbegin = $x;
$y++;
}
$x++;
}
$xend=0;
$x=$cryptwidth-1;
while (($x>0)and(!$xend)) {
$y=0;
while (($y<$cryptheight)and(!$xend)) {
if (imagecolorat($imgtmp,$x,$y) != $blank) $xend = $x;
$y++;
}
$x--;
}
$xvariation = round(($cryptwidth/2)-(($xend-$xbegin)/2));
imagedestroy ($imgtmp);
// Cr?ation du cryptogramme d?finitif
// Cr?ation du fond
$img = imagecreatetruecolor($cryptwidth,$cryptheight);
if ($bgimg and is_dir($bgimg)) {
$dh = opendir($bgimg);
while (false !== ($filename = readdir($dh)))
if(eregi(".[gif|jpg|png]$", $filename)) $files[] = $filename;
closedir($dh);
$bgimg = $bgimg.'/'.$files[array_rand($files,1)];
}
if ($bgimg) {
list($getwidth, $getheight, $gettype, $getattr) = getimagesize($bgimg);
switch ($gettype) {
case "1": $imgread = imagecreatefromgif($bgimg); break;
case "2": $imgread = imagecreatefromjpeg($bgimg); break;
case "3": $imgread = imagecreatefrompng($bgimg); break;
}
imagecopyresized ($img, $imgread, 0,0,0,0,$cryptwidth,$cryptheight,$getwidth,$getheight);
imagedestroy ($imgread);
}
else {
$bg = imagecolorallocate($img,$bgR,$bgG,$bgB);
imagefill($img,0,0,$bg);
if ($bgclear) imagecolortransparent($img,$bg);
}
function ecriture()
{
// Cr?ation de l'?criture
global $img, $ink, $charR, $charG, $charB, $charclear, $xvariation, $charnb, $charcolorrnd, $charcolorrndlevel, $tword, $charspace;
if (function_exists ('imagecolorallocatealpha')) $ink = imagecolorallocatealpha($img,$charR,$charG,$charB,$charclear);
else $ink = imagecolorallocate ($img,$charR,$charG,$charB);
$x = $xvariation;
for ($i=1;$i<=$charnb;$i++) {
if ($charcolorrnd){ // Choisit des couleurs au hasard
$ok = false;
do {
$rndR = rand(0,255); $rndG = rand(0,255); $rndB = rand(0,255);
$rndcolor = $rndR+$rndG+$rndB;
switch ($charcolorrndlevel) {
case 1 : if ($rndcolor<200) $ok=true; break; // tres sombre
case 2 : if ($rndcolor<400) $ok=true; break; // sombre
case 3 : if ($rndcolor>500) $ok=true; break; // claires
case 4 : if ($rndcolor>650) $ok=true; break; // tr?s claires
default : $ok=true;
}
} while (!$ok);
if (function_exists ('imagecolorallocatealpha')) $rndink = imagecolorallocatealpha($img,$rndR,$rndG,$rndB,$charclear);
else $rndink = imagecolorallocate ($img,$rndR,$rndG,$rndB);
}
$lafont="fonts/".$tword[$i]['font'];
imagettftext($img,$tword[$i]['size'],$tword[$i]['angle'],$x,$tword[$i]['y'],$charcolorrnd?$rndink:$ink,$lafont,$tword[$i]['element']);
$x +=$charspace;
}
}
function noisecolor()
// Fonction permettant de d?terminer la couleur du bruit et la forme du pinceau
{
global $img, $noisecolorchar, $ink, $bg, $brushsize;
switch ($noisecolorchar) {
case 1 : $noisecol=$ink; break;
case 2 : $noisecol=$bg; break;
case 3 :
default : $noisecol=imagecolorallocate ($img,rand(0,255),rand(0,255),rand(0,255)); break;
}
if ($brushsize and $brushsize>1 and function_exists('imagesetbrush')) {
$brush = imagecreatetruecolor($brushsize,$brushsize);
imagefill($brush,0,0,$noisecol);
imagesetbrush($img,$brush);
$noisecol=IMG_COLOR_BRUSHED;
}
return $noisecol;
}
function bruit()
// Ajout de bruits: point, lignes et cercles al?atoires
{
global $noisepxmin, $noisepxmax, $noiselinemin, $noiselinemax, $nbcirclemin, $nbcirclemax,$img, $cryptwidth, $cryptheight;
$nbpx = rand($noisepxmin,$noisepxmax);
$nbline = rand($noiselinemin,$noiselinemax);
$nbcircle = rand($nbcirclemin,$nbcirclemax);
for ($i=1;$i<$nbpx;$i++) imagesetpixel ($img,rand(0,$cryptwidth-1),rand(0,$cryptheight-1),noisecolor());
for ($i=1;$i<=$nbline;$i++) imageline($img,rand(0,$cryptwidth-1),rand(0,$cryptheight-1),rand(0,$cryptwidth-1),rand(0,$cryptheight-1),noisecolor());
for ($i=1;$i<=$nbcircle;$i++) imagearc($img,rand(0,$cryptwidth-1),rand(0,$cryptheight-1),$rayon=rand(5,$cryptwidth/3),$rayon,0,360,noisecolor());
}
if ($noiseup) {
ecriture();
bruit();
} else {
bruit();
ecriture();
}
// Cr?ation du cadre
if ($bgframe) {
$framecol = imagecolorallocate($img,($bgR*3+$charR)/4,($bgG*3+$charG)/4,($bgB*3+$charB)/4);
imagerectangle($img,0,0,$cryptwidth-1,$cryptheight-1,$framecol);
}
// Transformations suppl?mentaires: Grayscale et Brouillage
// V?rifie si la fonction existe dans la version PHP install?e
if (function_exists('imagefilter')) {
if ($cryptgrayscal) imagefilter ( $img,IMG_FILTER_GRAYSCALE);
if ($cryptgaussianblur) imagefilter ( $img,IMG_FILTER_GAUSSIAN_BLUR);
}
// Conversion du cryptogramme en Majuscule si insensibilit? ? la casse
$word = ($difuplow?$word:strtoupper($word));
// Retourne 2 informations dans la session:
// - Le code du cryptogramme (crypt? ou pas)
// - La Date/Heure de la cr?ation du cryptogramme au format integer "TimeStamp"
switch (strtoupper($cryptsecure)) {
case "MD5" : $_SESSION['cryptcode'] = md5($word); break;
case "SHA1" : $_SESSION['cryptcode'] = sha1($word); break;
default : $_SESSION['cryptcode'] = $word; break;
}
$_SESSION['crypttime'] = time();
$_SESSION['cryptcptuse']++;
// Envoi de l'image finale au navigateur
switch (strtoupper($cryptformat)) {
case "JPG" :
case "JPEG" : if (imagetypes() & IMG_JPG) {
header("Content-type: image/jpeg");
imagejpeg($img, "", 80);
}
break;
case "GIF" : if (imagetypes() & IMG_GIF) {
header("Content-type: image/gif");
imagegif($img);
}
break;
case "PNG" :
default : if (imagetypes() & IMG_PNG) {
header("Content-type: image/png");
imagepng($img);
}
}
imagedestroy ($img);
unset ($word,$tword);
unset ($_SESSION['cryptreload']);
?>
|
Download
