From 257b02851136d243a87407a0dc7a663eefc9b895 Mon Sep 17 00:00:00 2001
From: Sebastian Messmer <messmer@cryfs.org>
Date: Fri, 29 Apr 2016 12:46:14 -0700
Subject: [PATCH] Prevent opening file systems that were created with newer
 versions of CryFS

---
 src/cryfs/config/CryConfigLoader.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/cryfs/config/CryConfigLoader.cpp b/src/cryfs/config/CryConfigLoader.cpp
index 4738bd25..12a0c2fa 100644
--- a/src/cryfs/config/CryConfigLoader.cpp
+++ b/src/cryfs/config/CryConfigLoader.cpp
@@ -61,6 +61,9 @@ void CryConfigLoader::_checkVersion(const CryConfig &config) {
   if (!boost::starts_with(config.Version(), allowedVersionPrefix)) {
     throw std::runtime_error(string() + "This filesystem was created with CryFS " + config.Version() + " and is incompatible. Please create a new one with your version of CryFS and migrate your data.");
   }
+  if (gitversion::VersionCompare::isOlderThan(gitversion::VersionString(), config.Version())) {
+    throw std::runtime_error(string() + "This filesystem was used with CryFS " + config.Version() + " and should not be opened with older versions anymore. Please update your CryFS version.");
+  }
 }
 
 void CryConfigLoader::_checkCipher(const CryConfig &config) const {