From 56e16a8d855dafa7ad28273b2720883dba67bcf4 Mon Sep 17 00:00:00 2001
From: JustAMacUser <myself-cmsmxc3e@zaikos.com>
Date: Sat, 18 Apr 2020 21:33:56 -0400
Subject: [PATCH] Escape user-defined values during installation.

---
 config.php-dist   | 16 ++++++++--------
 install/index.php | 38 +++++++++++---------------------------
 2 files changed, 19 insertions(+), 35 deletions(-)

diff --git a/config.php-dist b/config.php-dist
index 244390b98..e83fdcfdc 100755
--- a/config.php-dist
+++ b/config.php-dist
@@ -3,12 +3,12 @@
 	// *** Database configuration (important!) ***
 	// *******************************************
 
-	define('DB_TYPE', "pgsql"); // or mysql
-	define('DB_HOST', "localhost");
-	define('DB_USER', "fox");
-	define('DB_NAME', "fox");
-	define('DB_PASS', "XXXXXX");
-	define('DB_PORT', ''); // usually 5432 for PostgreSQL, 3306 for MySQL
+	define('DB_TYPE', "%DB_TYPE"); // pgsql or mysql
+	define('DB_HOST', "%DB_HOST");
+	define('DB_USER', "%DB_USER");
+	define('DB_NAME', "%DB_NAME");
+	define('DB_PASS', "%DB_PASS");
+	define('DB_PORT', '%DB_PORT'); // usually 5432 for PostgreSQL, 3306 for MySQL
 
 	define('MYSQL_CHARSET', 'UTF8');
 	// Connection charset for MySQL. If you have a legacy database and/or experience
@@ -18,9 +18,9 @@
 	// *** Basic settings (important!) ***
 	// ***********************************
 
-	define('SELF_URL_PATH', 'https://example.org/tt-rss/');
+	define('SELF_URL_PATH', '%SELF_URL_PATH');
 	// This should be set to a fully qualified URL used to access
-	// your tt-rss instance over the net.
+	// your tt-rss instance over the net, such as: https://example.org/tt-rss/
 	// The value should be a constant string literal. Please don't use
 	// PHP server variables here - you might introduce security
 	// issues on your install and cause hard to debug problems.
diff --git a/install/index.php b/install/index.php
index e4728fa73..b7aedf29d 100755
--- a/install/index.php
+++ b/install/index.php
@@ -151,35 +151,19 @@
 	function make_config($DB_TYPE, $DB_HOST, $DB_USER, $DB_NAME, $DB_PASS,
 			$DB_PORT, $SELF_URL_PATH) {
 
-		$data = explode("\n", file_get_contents("../config.php-dist"));
+		$rv = file_get_contents("../config.php-dist");
 
-		$rv = "";
+		$settings = [
+			"%DB_TYPE" => $DB_TYPE == 'pgsql' ? 'pgsql' : 'mysql',
+			"%DB_HOST" => addslashes($DB_HOST),
+			"%DB_USER" => addslashes($DB_USER),
+			"%DB_NAME" => addslashes($DB_NAME),
+			"%DB_PASS" => addslashes($DB_PASS),
+			"%DB_PORT" => intval($DB_PORT),
+			"%SELF_URL_PATH" => addslashes($SELF_URL_PATH)
+		];
 
-		$finished = false;
-
-		foreach ($data as $line) {
-			if (preg_match("/define\('DB_TYPE'/", $line)) {
-				$rv .= "\tdefine('DB_TYPE', '$DB_TYPE');\n";
-			} else if (preg_match("/define\('DB_HOST'/", $line)) {
-				$rv .= "\tdefine('DB_HOST', '$DB_HOST');\n";
-			} else if (preg_match("/define\('DB_USER'/", $line)) {
-				$rv .= "\tdefine('DB_USER', '$DB_USER');\n";
-			} else if (preg_match("/define\('DB_NAME'/", $line)) {
-				$rv .= "\tdefine('DB_NAME', '$DB_NAME');\n";
-			} else if (preg_match("/define\('DB_PASS'/", $line)) {
-				$rv .= "\tdefine('DB_PASS', '$DB_PASS');\n";
-			} else if (preg_match("/define\('DB_PORT'/", $line)) {
-				$rv .= "\tdefine('DB_PORT', '$DB_PORT');\n";
-			} else if (preg_match("/define\('SELF_URL_PATH'/", $line)) {
-				$rv .= "\tdefine('SELF_URL_PATH', '$SELF_URL_PATH');\n";
-			} else if (!$finished) {
-				$rv .= "$line\n";
-			}
-
-			if (preg_match("/\?\>/", $line)) {
-				$finished = true;
-			}
-		}
+		$rv = str_replace(array_keys($settings), array_values($settings), $rv);
 
 		return $rv;
 	}