From b60bd7a115d6082441f983b39f3487459dcbc12c Mon Sep 17 00:00:00 2001
From: Nicolas Roman <nroman@evolix.fr>
Date: Tue, 30 Jul 2019 17:03:47 +0200
Subject: [PATCH] added isDomainReal function to test beforehand if the domain
 has an A or AAAA record

---
 inc/webadmin-letsencrypt.php | 10 ++++++++++
 lib/letsencrypt.php          | 14 ++++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/inc/webadmin-letsencrypt.php b/inc/webadmin-letsencrypt.php
index 5b46c4a..47ca4e5 100644
--- a/inc/webadmin-letsencrypt.php
+++ b/inc/webadmin-letsencrypt.php
@@ -134,6 +134,16 @@ if (isset($_POST['submit'])) {
         // Check existing SSL certificate
         $domainsIncluded = array();
         foreach ($_SESSION['letsencrypt-domains'] as $domain) {
+
+            $isDomainReal = $letsencrypt->isDomainReal($domain);
+
+            if ($isDomainReal === false) {
+                $errorMessage = "Erreur : le domaine " . $domain . " n'existe pas. Veuillez vérifier les enregistrements DNS.";
+
+                array_push($messages, ["type" => "error", "content" => $errorMessage]);
+                break 2;
+            }
+
             $existingSSLCertificate = $letsencrypt->getCertificate($domain);
             // if no certificate is present (false returned) for this domain, go to the next domain
             if (is_bool($existingSSLCertificate)) {
diff --git a/lib/letsencrypt.php b/lib/letsencrypt.php
index 8c0d2d4..deb427e 100644
--- a/lib/letsencrypt.php
+++ b/lib/letsencrypt.php
@@ -27,6 +27,20 @@ class LetsEncrypt
         sudoexec($cmd, $data_output, $exec_return);
     }
 
+    /**
+     * verify if the domain exists
+     * @param  string  $domain
+     * @return boolean
+     */
+    public function isDomainReal($domain)
+    {
+        if (checkdnsrr($domain, 'A') || checkdnsrr($domain, 'AAAA')) {
+            return true;
+        }
+
+        return false;
+    }
+
     /**
      * generate a CSR
      * @param  string $vhost