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<?php namespace Altum; class Captcha { /* Configuration Variables / private $image_width = 120; private $image_height = 30; private $text_length = 6; private $lines = 6; private $background_color = [255, 255, 255]; private $text_color = [0, 0, 0]; private $lines_color = [63, 63, 63]; public function __construct() { / :) / } / Custom valid function for both the normal captcha and the recaptcha / public function is_valid() { if(settings()->captcha->type == 'recaptcha' && settings()->captcha->recaptcha_public_key && settings()->captcha->recaptcha_private_key) { $recaptcha = new \ReCaptcha\ReCaptcha(settings()->captcha->recaptcha_private_key); $response = $recaptcha->verify($_POST['g-recaptcha-response'], $_SERVER['REMOTE_ADDR']); return ($response->isSuccess()); } else if(settings()->captcha->type == 'hcaptcha' && settings()->captcha->hcaptcha_site_key && settings()->captcha->hcaptcha_secret_key) { $response = \Unirest\Request::post('https://hcaptcha.com/siteverify', [], [ 'secret' => settings()->captcha->hcaptcha_secret_key, 'response' => $_POST['h-captcha-response'], ]); return isset($response->body) && isset($response->body->success) && $response->body->success; } else { return ($_POST['captcha'] == $_SESSION['captcha']); } } / Display function based on the captcha settings ( normal captcha or recaptcha ) / public function display() { if(settings()->captcha->type == 'recaptcha' && settings()->captcha->recaptcha_public_key && settings()->captcha->recaptcha_private_key) { echo '<div class="g-recaptcha" data-sitekey="' . settings()->captcha->recaptcha_public_key . '"></div>'; echo '<script src="https://www.google.com/recaptcha/api.js" async defer></script>'; echo '<input type="hidden" name="captcha" class="form-control ' . (\Altum\Alerts::has_field_errors('captcha') ? 'is-invalid' : null) . '">'; echo \Altum\Alerts::output_field_error('captcha'); } else if(settings()->captcha->type == 'hcaptcha' && settings()->captcha->hcaptcha_site_key && settings()->captcha->hcaptcha_secret_key) { echo '<div class="h-captcha" data-sitekey="' . settings()->captcha->hcaptcha_site_key . '"></div>'; echo '<script src="https://hcaptcha.com/1/api.js" async defer></script>'; echo '<input type="hidden" name="captcha" class="form-control ' . (\Altum\Alerts::has_field_errors('captcha') ? 'is-invalid' : null) . '">'; echo \Altum\Alerts::output_field_error('captcha'); } else { echo ' <img src="data:image/png;base64,' . base64_encode($this->create_simple_captcha()) . '" class="mb-2" id="captcha" alt="' . language()->global->accessibility->captcha_alt . '" /> <input type="text" name="captcha" class="form-control ' . (\Altum\Alerts::has_field_errors('captcha') ? 'is-invalid' : null) . '" placeholder="' . language()->global->captcha_placeholder . '" aria-label="' . language()->global->accessibility->captcha_input . '" required="required" autocomplete="off" /> ' . \Altum\Alerts::output_field_error('captcha') . ' '; } } / Generating the captcha image / public function create_simple_captcha() { / Generate the text / $text = null; for($i = 1; $i <= $this->text_length; $i++) $text .= mt_rand(1, 9) . ' '; / Store the generated text in Sessions / $_SESSION['captcha'] = str_replace(' ', '', $text); / Create the image / $image = imagecreate($this->image_width, $this->image_height); / Define the background color / imagecolorallocate($image, $this->background_color[0], $this->background_color[1], $this->background_color[2]); / Start writing the text / imagestring($image, 5, 7, 7, $text, imagecolorallocate($image, $this->text_color[0], $this->text_color[1], $this->text_color[2])); / Generate lines / for($i = 1; $i <= $this->lines; $i++) imageline($image, mt_rand(1, $this->image_width), mt_rand(1, $this->image_height), mt_rand(1, $this->image_width), mt_rand(1, $this->image_height), imagecolorallocate($image, $this->lines_color[0], $this->lines_color[1], $this->lines_color[2])); / Output the image */ ob_start(); imagepng($image, null, 9); $image_data = ob_get_clean(); return $image_data; } }

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