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📁 ..
📄 .htaccess(420 B)
📄 EDD_SL_Plugin_Updater.php(18.7 KB)
📁 bootstrap
📄 class-cert-expiration.php(5.64 KB)
📄 class-importer.php(22.85 KB)
📄 class-licensing.php(24.31 KB)
📄 class-multisite.php(22.74 KB)
📄 class-premium-options.php(106.1 KB)
📄 class-scan.php(92.41 KB)
📄 class-support.php(3.81 KB)
📄 csp-violation-endpoint.php(21.83 KB)
📁 css
📄 front-end.php(5.22 KB)
📁 grid
📁 img
📄 index.php(34 B)
📁 js
📁 languages
📄 readme.txt(15.09 KB)
📄 really-simple-ssl-pro.php(11.19 KB)
📄 uninstall.php(2.91 KB)

Editing: class-cert-expiration.php

<?php
/* 100% match ms */
defined('ABSPATH') or die("you do not have access to this page!");

/**
 * Get nice expiration date
 * @return string
 */
function rsssl_pro_expiration_date_nice()
{
    $date = __("Not detected", "really-simple-ssl-pro");
    $expiration_date = get_transient('rsssl_cert_expiration_date');
    if ($expiration_date) $date = date(get_option('date_format'), $expiration_date);
    return $date;
}

/**
 * Check if certificate is almost expired
 * @return bool
 */

function rsssl_pro_almost_expired()
{
    $expiration_date = get_transient('rsssl_cert_expiration_date');

if (!$expiration_date) {
        rsssl_pro_check_certificate_expiration();
        $expiration_date = get_transient('rsssl_cert_expiration_date');
    }

if (!$expiration_date) {
        return false;
    }

$dateInTwoWeeks = strtotime('+2 weeks');
 if ($expiration_date && ($dateInTwoWeeks < $expiration_date)) {
 return false;
 } else {
 return true;
 }
}

/**
 * Add pro schedule
 */
function rsssl_pro_schedule_cron()
{
    if (!is_ssl()) return;
    if (!get_option('rsssl_cert_expiration_warning') && !(is_multisite() && RSSSL()->rsssl_multisite->cert_expiration_warning)) return;

$useCron = true;

if ($useCron) {
        if (!wp_next_scheduled('rsssl_pro_daily_hook')) {
            wp_schedule_event(time(), 'daily', 'rsssl_pro_daily_hook');
        }
        //link function to this custom cron hook
        add_action('rsssl_pro_daily_hook', 'rsssl_pro_check_certificate_expiration');
    } else {
        add_action('shutdown', 'rsssl_pro_check_certificate_expiration');
    }
}
add_action('init', 'rsssl_pro_schedule_cron');

/**
 * Add our own schedule
 * @param $schedules
 *
 * @return mixed
 */
function rsssl_pro_add_schedule($schedules)
{

$schedules['daily'] = array(
        'interval' => DAY_IN_SECONDS,
        'display' => __('Once Daily')
    );

$schedules['ten_minutes'] = array(
        'interval' => 600,
        'display' => __('Once 10 minutes')
    );

$schedules['one_minute'] = array(
        'interval' => 60,
        'display' => __('Once 1 minutes')
    );

return $schedules;
}
add_filter('cron_schedules', 'rsssl_pro_add_schedule', 10, 1);

/**
 * Check expiration
 * @return bool|void
 */

function rsssl_pro_check_certificate_expiration()
{

if (!is_ssl()) return;

if (get_transient('rsssl_stop_certificate_expiration_check')) return;

if (!get_option('rsssl_cert_expiration_warning') && !(is_multisite() && RSSSL()->rsssl_multisite->cert_expiration_warning)) return false;

//older versions of PHP do not support this
    if (!function_exists('stream_context_get_params')) return;

$end_date = false;

//check if the certificate is still valid, and send an email to the administrator of this is not the case.
    $url = home_url();
    $original_parse = parse_url($url, PHP_URL_HOST);

if ($original_parse) {

$get = stream_context_create(array("ssl" => array("capture_peer_cert" => TRUE)));
        if ($get) {
            set_error_handler('rsssl_pro_custom_error_handling');
            $read = stream_socket_client("ssl://" . $original_parse . ":443", $errno, $errstr, 5, STREAM_CLIENT_CONNECT, $get);
            restore_error_handler();

if (!$read){
            	//stop checking for a while
	            set_transient('rsssl_stop_certificate_expiration_check', true, WEEK_IN_SECONDS );
            }
            if ($errno == 0 && $read) {

$cert = stream_context_get_params($read);
                $certinfo = openssl_x509_parse($cert['options']['ssl']['peer_certificate']);

$end_date = $certinfo["validTo_time_t"];

}
        }
    }

//save valid to date for use in config page
    set_transient('rsssl_cert_expiration_date', $end_date, DAY_IN_SECONDS);

$dateInTwoWeeks = strtotime('+2 weeks');
    //if the time in two weeks is past the end date, we need to send a warning.
    if ($end_date && $dateInTwoWeeks > $end_date) {
        //send warning if not sent before.
        if (!get_transient('rsssl_sent_cert_expiration_warning')) {
            $success = rsssl_pro_send_cert_expiration_email();
            if ($success) set_transient('rsssl_sent_cert_expiration_warning', TRUE, 14 * DAY_IN_SECONDS );
        }
    }

}

/**
 * Set custom error handling
 * @param       $errno
 * @param       $errstr
 * @param       $errfile
 * @param       $errline
 * @param array $errcontext
 *
 * @return bool
 */
function rsssl_pro_custom_error_handling($errno, $errstr, $errfile, $errline, $errcontext = array() )
{
    return true;
}

/**
 * Send expiration email
 * @return bool
 */

function rsssl_pro_send_cert_expiration_email()
{
    //only proceed if we hav a valid end date
    if (!get_transient('rsssl_cert_expiration_date')) return false;

$headers = array();
 $to = get_option('admin_email');
 $subject = __("SSL certificate expiration warning", "really-simple-ssl-pro");
 $body = __("According to the check that was performed just now on ", "really-simple-ssl-pro") . home_url();
 $body .= __(" the SSL certificate is expiring soon. The ValidTo date is:", "really-simple-ssl-pro") . " ";
 $body .= rsssl_pro_expiration_date_nice() . " ";
 $body .= __("Please renew your certificate before the expiry date.", "really-simple-ssl-pro") . " ";

add_filter('wp_mail_content_type', "rsssl_pro_set_mail_content_type");

$success = true;

if (wp_mail($to, $subject, $body) === false) $success = false;

// Reset content-type to avoid conflicts -- http://core.trac.wordpress.org/ticket/23578
	add_filter( 'wp_mail_content_type', function ( $content_type ) {
		return 'text/html';
	} );
	return $success;
}

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Editing: class-cert-expiration.php

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