From 8e9fc6f6e6afc052a2c3b2d459764cc9ab20420a Mon Sep 17 00:00:00 2001
From: ArthurHoaro <arthur@hoa.ro>
Date: Fri, 17 Nov 2017 19:04:14 +0100
Subject: [PATCH] Force HTTPS if the original port is 443 behind a reverse
 proxy

Fixes #1022
---
 application/HttpUtils.php         |  7 +++++++
 tests/HttpUtils/ServerUrlTest.php | 32 +++++++++++++++++++++++++++++++
 2 files changed, 39 insertions(+)

diff --git a/application/HttpUtils.php b/application/HttpUtils.php
index 00835966..c6181df4 100644
--- a/application/HttpUtils.php
+++ b/application/HttpUtils.php
@@ -302,6 +302,13 @@ function server_url($server)
                 $port = $server['HTTP_X_FORWARDED_PORT'];
             }
 
+            // This is a workaround for proxies that don't forward the scheme properly.
+            // Connecting over port 443 has to be in HTTPS.
+            // See https://github.com/shaarli/Shaarli/issues/1022
+            if ($port == '443') {
+                $scheme = 'https';
+            }
+
             if (($scheme == 'http' && $port != '80')
                 || ($scheme == 'https' && $port != '443')
             ) {
diff --git a/tests/HttpUtils/ServerUrlTest.php b/tests/HttpUtils/ServerUrlTest.php
index dac02b3e..324b827a 100644
--- a/tests/HttpUtils/ServerUrlTest.php
+++ b/tests/HttpUtils/ServerUrlTest.php
@@ -186,4 +186,36 @@ public function testStandardHttpsPort()
             )
         );
     }
+
+    /**
+     * Misconfigured server (see #1022): Proxy HTTP but 443
+     */
+    public function testHttpWithPort433()
+    {
+        $this->assertEquals(
+            'https://host.tld',
+            server_url(
+                array(
+                    'HTTPS' => 'Off',
+                    'SERVER_NAME' => 'host.tld',
+                    'SERVER_PORT' => '80',
+                    'HTTP_X_FORWARDED_PROTO' => 'http',
+                    'HTTP_X_FORWARDED_PORT' => '443'
+                )
+            )
+        );
+
+        $this->assertEquals(
+            'https://host.tld',
+            server_url(
+                array(
+                    'HTTPS' => 'Off',
+                    'SERVER_NAME' => 'host.tld',
+                    'SERVER_PORT' => '80',
+                    'HTTP_X_FORWARDED_PROTO' => 'https, http',
+                    'HTTP_X_FORWARDED_PORT' => '443, 80'
+                )
+            )
+        );
+    }
 }