<?php

$width = 180;
$height = 60;
$step = 5;
$back_color = '#D2F0FF';
$bar_color = '9999ff';
$font_color = '000080';
$font_path = "c:/windows/fonts/";
$font_name = "cour.ttf";
$charset = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
$pass_length = 10;
$trans = 0;
$angle = 10;
$session_name = '1mAgeGenGeaDer1nf0';

$hash = '';

# do not access this variable
$__code = '';

function mkcolor($image,$color,$alpha = false){ #used for creating colors from html formatted colors
$color = str_replace("#","",$color);
$red = hexdec(substr($color,0,2));
$green = hexdec(substr($color,2,2));
$blue = hexdec(substr($color,4,2));
if ($alpha!==false){
$out = imagecolorallocatealpha($image, $red, $green, $blue, $alpha);
}else{
$out = ImageColorAllocate($image, $red, $green, $blue);
}
return($out);
}

function genpass(){ # generates the password (displayed on the image) it also creates the hash value
$hash = '';
$__code = '';
for($p=0; $p < $pass_length; $p++) {
$__code.=substr($charset,rand(1,strlen($charset)),1);
}
if (strlen($__code)<10){
$__code.=substr($charset,rand(1,strlen($charset)),1);
}
$hash = strrev(md5($__code));
}

function setpass($pass){ # sets the passwordand re-creates the hash (used for testing inputs)
$__code = $pass;
$hash = strrev(md5($__code));
}

function decodepass(){ # used for retrieving password passed via session
gen_sess();
setpass(base64_decode(strrev(unserialize($_SESSION['magic']))));
}

function encodepass(){ # used for encoding password passed into a session
gen_sess();
$_SESSION['magic'] = serialize(strrev(base64_encode($__code)));
}

function gen_sess(){ # starts the session used for encodepass and decodepass (both of these funstion call this function themselves)
session_name($session_name);
session_start();
}

function kill_sess(){ # kills the session created by gen_sess (this function calls gen_sess)
gen_sess();
session_destroy();
}

function testpass($hash,$pass){ # tests pass against hash and returns true or false
return (strrev($hash)==md5($pass));
}

function image(){ # creates the actual image (you'll want to kill the script after this)
//Create image and setup come colors
$image = imagecreatetruecolor($width, $height);
$back=mkcolor($image,$back_color);
$border=mkcolor($image,$bar_color);
$codice=mkcolor($image,$font_color,$trans);
imagefilledrectangle($image, 0, 0, $width-1, $height-1, $back);
imagerectangle($image, 0, 0, $width-1, $height-1, $border);

//Draw code over the image
imagettftext($image, 20, $angle, (integer)($width/13), (integer)($height/1.15), $codice, $font_path.$font_name, $__code);

//Making background grid
for ($k=$step;$k<=$width;$k+=$step) {
imageline($image, $k, 0, $k, $height, $border);
}
for ($s=$step;$s<=$height;$s+=$step) {
imageline($image, 0, $s, $width, $s, $border);
}

header('Content-type: image/png');
imagepng($image);
imagedestroy($image);
}


?>