validate session on startup

1 files changed, 70 insertions, 1 deletions

diff --git a/include/sessions.php b/include/sessions.php
index 727d955d0..81a5a7383 100644
--- a/include/sessions.php
+++ b/include/sessions.php
@@ -17,6 +17,75 @@
 	ini_set("session.use_only_cookies", true);
 	ini_set("session.gc_maxlifetime", $session_expire);
 
+	function session_get_schema_version($link, $nocache = false) {
+		global $schema_version;
+
+		if (!$schema_version) {
+			$result = db_query($link, "SELECT schema_version FROM ttrss_version");
+			$version = db_fetch_result($result, 0, "schema_version");
+			$schema_version = $version;
+			return $version;
+		} else {
+			return $schema_version;
+		}
+	}
+
+	function validate_session($link) {
+		if (SINGLE_USER_MODE) return true;
+
+		$check_ip = $_SESSION['ip_address'];
+
+		switch (SESSION_CHECK_ADDRESS) {
+		case 0:
+			$check_ip = '';
+			break;
+		case 1:
+			$check_ip = substr($check_ip, 0, strrpos($check_ip, '.')+1);
+			break;
+		case 2:
+			$check_ip = substr($check_ip, 0, strrpos($check_ip, '.'));
+			$check_ip = substr($check_ip, 0, strrpos($check_ip, '.')+1);
+			break;
+		};
+
+		if ($check_ip && strpos($_SERVER['REMOTE_ADDR'], $check_ip) !== 0) {
+			$_SESSION["login_error_msg"] =
+				__("Session failed to validate (incorrect IP)");
+			return false;
+		}
+
+		if ($_SESSION["ref_schema_version"] != session_get_schema_version($link, true))
+			return false;
+
+		if ($_SESSION["uid"]) {
+			$result = db_query($link,
+				"SELECT pwd_hash FROM ttrss_users WHERE id = '".$_SESSION["uid"]."'");
+
+			// user not found
+			if (db_num_rows($result) == 0) {
+				return false;
+			} else {
+				$pwd_hash = db_fetch_result($result, 0, "pwd_hash");
+
+				if ($pwd_hash != $_SESSION["pwd_hash"]) {
+					return false;
+				}
+			}
+		}
+
+/*		if ($_SESSION["cookie_lifetime"] && $_SESSION["uid"]) {
+
+			//print_r($_SESSION);
+
+			if (time() > $_SESSION["cookie_lifetime"]) {
+				return false;
+			}
+		} */
+
+		return true;
+	}
+
+
 	function ttrss_open ($s, $n) {
 
 		global $session_connection;
@@ -106,7 +175,7 @@
 		if (isset($_COOKIE[$session_name])) {
 			@session_start();
 
-			if (!isset($_SESSION["uid"]) || !$_SESSION["uid"]) {
+			if (!isset($_SESSION["uid"]) || !$_SESSION["uid"] || !validate_session($session_connection)) {
 				session_destroy();
 			   setcookie(session_name(), '', time()-42000, '/');
 			}