204 lines
3.5 KiB
PHP
Executable File
204 lines
3.5 KiB
PHP
Executable File
<?php
|
|
|
|
if(
|
|
isset($_GET["v"]) === false ||
|
|
is_array($_GET["v"]) === true ||
|
|
preg_match(
|
|
'/^c[0-9]+\.[A-Za-z0-9_]{20}$/',
|
|
$_GET["v"]
|
|
) === 0
|
|
){
|
|
|
|
http_response_code(401);
|
|
header("Content-Type: text/plain");
|
|
echo "Fuck my feathered cloaca";
|
|
die();
|
|
}
|
|
|
|
//header("Content-Type: image/jpeg");
|
|
include "data/config.php";
|
|
|
|
if(config::BOT_PROTECTION !== 1){
|
|
|
|
header("Content-Type: text/plain");
|
|
echo "The IQ test is disabled";
|
|
die();
|
|
}
|
|
|
|
$grid = apcu_fetch($_GET["v"]);
|
|
|
|
if($grid !== false){
|
|
|
|
// captcha already generated
|
|
http_response_code(304); // not modified
|
|
die();
|
|
}
|
|
|
|
header("Content-Type: image/jpeg");
|
|
header("Last-Modified: Thu, 01 Oct 1970 00:00:00 GMT");
|
|
|
|
// ** generate captcha data
|
|
// get the positions for the answers
|
|
// will return between 3 and 6 answer positions
|
|
$range = range(0, 15);
|
|
$answer_pos = [];
|
|
|
|
array_splice($range, 0, 1);
|
|
|
|
$picks = random_int(3, 6);
|
|
|
|
for($i=0; $i<$picks; $i++){
|
|
|
|
$answer_pos_tmp =
|
|
array_splice(
|
|
$range,
|
|
random_int(
|
|
0,
|
|
14 - $i
|
|
),
|
|
1
|
|
);
|
|
|
|
$answer_pos[] = $answer_pos_tmp[0];
|
|
}
|
|
|
|
// choose a dataset
|
|
$c = count(config::CAPTCHA_DATASET);
|
|
$choosen = config::CAPTCHA_DATASET[random_int(0, $c - 1)];
|
|
$choices = [];
|
|
|
|
for($i=0; $i<$c; $i++){
|
|
|
|
if(config::CAPTCHA_DATASET[$i][0] == $choosen[0]){
|
|
|
|
continue;
|
|
}
|
|
|
|
$choices[] = config::CAPTCHA_DATASET[$i];
|
|
}
|
|
|
|
// generate grid data
|
|
$grid = [];
|
|
|
|
for($i=0; $i<16; $i++){
|
|
|
|
if(in_array($i, $answer_pos)){
|
|
|
|
$grid[] = $choosen;
|
|
}else{
|
|
|
|
$grid[] = $choices[random_int(0, count($choices) - 1)];
|
|
}
|
|
}
|
|
|
|
// store grid data for form validation on captcha_gen.php
|
|
apcu_store(
|
|
$_GET["v"],
|
|
$answer_pos,
|
|
60 // we give user 1 minute to solve
|
|
);
|
|
|
|
// generate image
|
|
if(random_int(0,1) === 0){
|
|
|
|
$theme = [
|
|
"bg" => "#ebdbb2",
|
|
"fg" => "#1d2021"
|
|
];
|
|
}else{
|
|
|
|
$theme = [
|
|
"bg" => "#1d2021",
|
|
"fg" => "#ebdbb2"
|
|
];
|
|
}
|
|
|
|
$im = new Imagick();
|
|
$im->newImage(400, 427, $theme["bg"]);
|
|
$im->setImageBackgroundColor($theme["bg"]);
|
|
$im->setImageFormat("jpg");
|
|
|
|
$noise = [
|
|
imagick::NOISE_GAUSSIAN,
|
|
imagick::NOISE_LAPLACIAN
|
|
];
|
|
|
|
$distort = [
|
|
imagick::DISTORTION_AFFINE,
|
|
imagick::DISTORTION_SHEPARDS
|
|
];
|
|
|
|
$i = 0;
|
|
for($y=0; $y<4; $y++){
|
|
|
|
for($x=0; $x<4; $x++){
|
|
|
|
$tmp = new Imagick("./data/captcha/" . $grid[$i][0] . "/" . random_int(1, $grid[$i][1]) . ".png");
|
|
|
|
// convert transparency correctly
|
|
$tmp->setImageBackgroundColor("black");
|
|
$tmp->setImageAlphaChannel(Imagick::ALPHACHANNEL_REMOVE);
|
|
|
|
// randomly mirror
|
|
if(random_int(0,1) === 1){
|
|
|
|
$tmp->flopImage();
|
|
}
|
|
|
|
// distort $tmp
|
|
$tmp->distortImage(
|
|
$distort[random_int(0,1)],
|
|
[
|
|
0, 0,
|
|
random_int(-15, 15), random_int(-15, 15),
|
|
|
|
100, 0,
|
|
random_int(80, 120), random_int(-15, 15),
|
|
|
|
100, 100,
|
|
random_int(80, 120), random_int(80, 120),
|
|
|
|
0, 100,
|
|
random_int(-15, 15), random_int(80, 120)
|
|
],
|
|
false
|
|
);
|
|
|
|
$tmp->addNoiseImage($noise[random_int(0, 1)]);
|
|
|
|
// append image
|
|
$im->compositeImage($tmp->getImage(), Imagick::COMPOSITE_DEFAULT, $x * 100, ($y * 100) + 27);
|
|
|
|
$i++;
|
|
}
|
|
}
|
|
|
|
// add text
|
|
$draw = new ImagickDraw();
|
|
$draw->setFontSize(20);
|
|
$draw->setFillColor($theme["fg"]);
|
|
//$draw->setTextAntialias(false);
|
|
$draw->setFont("./data/captcha/font.ttf");
|
|
|
|
$text = "Pick " . $picks . " images of " . str_replace("_", " ", $choosen[0]);
|
|
|
|
$pos = 200 - ($im->queryFontMetrics($draw, $text)["textWidth"] / 2);
|
|
|
|
for($i=0; $i<strlen($text); $i++){
|
|
|
|
$im->annotateImage(
|
|
$draw,
|
|
$pos,
|
|
20,
|
|
random_int(-15, 15),
|
|
$text[$i]
|
|
);
|
|
|
|
$pos += $im->queryFontMetrics($draw, $text[$i])["textWidth"];
|
|
|
|
}
|
|
|
|
$im->setFormat("jpeg");
|
|
$im->setImageCompressionQuality(90);
|
|
echo $im->getImageBlob();
|