Initial commit
This commit is contained in:
Jill Stingray
commit
5070bdcc6c
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vendor
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<?php declare(strict_types=1);
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namespace captcha;
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use Nette\Utils\Image;
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use Chandler\Session\Session;
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use Chandler\Patterns\TSimpleSingleton;
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class CaptchaManager
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{
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private $session;
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private function __construct()
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{
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$this->session = Session::i();
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}
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private function generateColor(bool $maxOutRed = false): array
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{
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return [
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"red" => $maxOutRed ? 255 : random_int(0, 150),
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"green" => random_int(0, 100),
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"blue" => random_int(0, 150),
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"alpha" => 0,
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];
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}
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private function generateCode(): string
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{
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return str_replace("/", "+", base64_encode(openssl_random_pseudo_bytes(6)));
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}
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private function applyNoiseOnImage(Image $image, \Closure $fun): void
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{
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$_noise = (function() use ($image) {
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foreach(range(1, 33) as $x)
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foreach(range(1, 13) as $y)
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$image->setPixel($x * 5, $y * 5, $this->generateColor());
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});
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$_noise();
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$fun();
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$_noise();
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}
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private function applyLinesOnImage(Image $image, \Closure $fun): void
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{
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$_lines = (function() use ($image) {
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foreach(range(1, random_int(2, 6)) as $i)
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$image->line(random_int(0, 15), random_int(0, 65), random_int(150, 165), random_int(0, 65), $this->generateColor());
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});
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$_lines();
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$fun();
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$_lines();
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}
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private function generateCaptchaImage(string $code): Image
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{
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$image = Image::fromBlank(165, 65, $this->generateColor());
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$this->applyNoiseOnImage($image, function() use ($image, $code) {
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$this->applyLinesOnImage($image, function() use ($image, $code) {
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$length = iconv_strlen($code);
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$offset = 165 / $length;
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for($i = 0; $i < $length; $i++) {
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$letter = $code[$i];
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$font = __DIR__ . "/data/san-francissco.ttf";
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$x = (int) ceil(0 + ($offset * $i));
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$y = random_int(45, 55);
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$image->ttfText(random_int(18, 28), random_int(-10, 10), $x, $y, $this->generateColor(true), $font, $letter);
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}
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});
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});
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return $image;
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}
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function getImage(): Image
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{
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$code = $this->generateCode();
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$hash = hash("crc32b", mb_strtolower($code));
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$image = $this->generateCaptchaImage($code);
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$nonce = bin2hex(openssl_random_pseudo_bytes(SODIUM_CRYPTO_STREAM_NONCEBYTES / 2));
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$key = substr(CHANDLER_ROOT_CONF["security"]["secret"], 0, SODIUM_CRYPTO_STREAM_KEYBYTES);
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$encHash = sodium_crypto_stream_xor($hash, $nonce, $key);
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$this->session->set("captcha", implode(":", [
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time(),
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$nonce,
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base64_encode($encHash),
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]));
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return $image;
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}
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function verifyCaptcha(string $input): bool
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{
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if(!CAPTCHA_ROOT_CONF["captcha"]["enable"])
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return true;
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$data = $this->session->get("captcha");
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if(!$data)
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return false;
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$this->session->set("captcha", "");
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[$time, $nonce, $encHash] = explode(":", $data);
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if((time() - $time) > 3600)
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return false;
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$key = substr(CHANDLER_ROOT_CONF["security"]["secret"], 0, SODIUM_CRYPTO_STREAM_KEYBYTES);
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$hash = sodium_crypto_stream_xor(base64_decode($encHash), $nonce, $key);
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return hash_equals(hash("crc32b", mb_strtolower($input)), $hash);
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}
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use TSimpleSingleton;
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}
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@ -0,0 +1,20 @@
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<?php declare(strict_types=1);
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namespace captcha\Web\Presenters;
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use Chandler\MVC\SimplePresenter;
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use Nette\Utils\Image;
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use captcha\CaptchaManager;
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class CaptchaPresenter extends SimplePresenter
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{
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function renderCaptcha()
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{
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$manager = CaptchaManager::i();
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$image = $manager->getImage();
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header("Pragma: no-cache");
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header("Expires: Wed, 12 Feb 2003 00:00:00 GMT");
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header("Cache-Control: no-cache, no-store, no-transform, must-revalidate");
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$image->send(Image::WEBP, 32);
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exit;
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}
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}
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services:
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- captcha\Web\Presenters\CaptchaPresenter
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static: "static"
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routes:
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- url: "captcha.webp"
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handler: "Captcha->captcha"
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<?php declare(strict_types=1);
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use captcha\CaptchaManager;
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function captcha_template(): string
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{
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$html = <<<'HTML'
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<div class="captcha">
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<img src="/captcha/captcha.webp" alt="Captcha" style="margin-bottom: 8px; width: 130px;" />
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<br/>
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<input type="text" name="captcha" placeholder="Enter 8 characters" />
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</div>
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HTML;
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return CAPTCHA_ROOT_CONF["captcha"]["enable"] ? $html : "You have already verified that you are not a robot.";
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}
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function check_captcha(?string $input): bool
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{
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return CaptchaManager::i()->verifyCaptcha((string) $input);
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}
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return (function() {});
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@ -0,0 +1,2 @@
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captcha:
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enable: false
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@ -0,0 +1,5 @@
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{
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"require": {
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"nette/utils": "^3.1"
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}
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}
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@ -0,0 +1,96 @@
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{
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"_readme": [
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"This file locks the dependencies of your project to a known state",
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"Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
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"This file is @generated automatically"
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],
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"content-hash": "141496a9fa1ec7cb854debfd40127510",
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"packages": [
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{
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"name": "nette/utils",
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"version": "v3.1.1",
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"source": {
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"type": "git",
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"url": "https://github.com/nette/utils.git",
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"reference": "2c17d16d8887579ae1c0898ff94a3668997fd3eb"
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},
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"dist": {
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"type": "zip",
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"url": "https://api.github.com/repos/nette/utils/zipball/2c17d16d8887579ae1c0898ff94a3668997fd3eb",
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"reference": "2c17d16d8887579ae1c0898ff94a3668997fd3eb",
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"shasum": ""
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},
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"require": {
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"php": ">=7.1"
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},
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"require-dev": {
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"nette/tester": "~2.0",
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"phpstan/phpstan": "^0.12",
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"tracy/tracy": "^2.3"
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},
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"suggest": {
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"ext-gd": "to use Image",
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"ext-iconv": "to use Strings::webalize() and toAscii()",
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"ext-intl": "to use Strings::webalize(), toAscii(), normalize() and compare()",
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"ext-json": "to use Nette\\Utils\\Json",
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"ext-mbstring": "to use Strings::lower() etc...",
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"ext-tokenizer": "to use Nette\\Utils\\Reflection::getUseStatements()",
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"ext-xml": "to use Strings::length() etc. when mbstring is not available"
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},
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"type": "library",
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"extra": {
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"branch-alias": {
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"dev-master": "3.1-dev"
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}
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},
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"autoload": {
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"classmap": [
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"src/"
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]
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},
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"notification-url": "https://packagist.org/downloads/",
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"license": [
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"BSD-3-Clause",
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"GPL-2.0-only",
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"GPL-3.0-only"
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],
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"authors": [
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{
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"name": "David Grudl",
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"homepage": "https://davidgrudl.com"
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},
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{
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"name": "Nette Community",
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"homepage": "https://nette.org/contributors"
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}
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],
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"description": "🛠 Nette Utils: lightweight utilities for string & array manipulation, image handling, safe JSON encoding/decoding, validation, slug or strong password generating etc.",
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"homepage": "https://nette.org",
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"keywords": [
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"array",
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"core",
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"datetime",
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"images",
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"json",
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"nette",
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"paginator",
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"password",
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"slugify",
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"string",
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"unicode",
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"utf-8",
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"utility",
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"validation"
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],
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"time": "2020-02-09T14:10:55+00:00"
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}
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],
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"packages-dev": [],
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"aliases": [],
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"minimum-stability": "stable",
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"stability-flags": [],
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"prefer-stable": false,
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"prefer-lowest": false,
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"platform": [],
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"platform-dev": []
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}
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Binary file not shown.
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name: "ViCaptcha"
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description: "Captcha for libchandler apps"
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author: "OpenVK contributors"
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version: "0.0.1-alpha"
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init: "bootstrap.php"
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