libcryfs/README.md

CryFS

CryFS encrypts your files, so you can safely store them anywhere. It works well together with cloud services like Dropbox, iCloud, OneDrive and others. See https://www.cryfs.org.

Install latest release

This only works for Ubuntu 17.04 and later, and Debian Stretch and later. You can also use CryFS on older versions of these distributions by following the Building from source instructions below.

sudo apt install cryfs

GUI

Theres some GUI applications with CryFS support. You usually have to install the GUI and also CryFS itself for it to work.

• SiriKali
• Plasma Vault in KDE Plasma >= 5.11

Building from source

Requirements

• Git (for getting the source code)
• GCC version >= 5.0 or Clang >= 4.0
• CMake version >= 3.0
• libcurl4 (including development headers)
• Boost libraries version >= 1.57 (including development headers)
  • filesystem
  • system
  • chrono
  • program_options
  • thread
• SSL development libraries (including development headers, e.g. libssl-dev)
• libFUSE version >= 2.8.6 (including development headers), on Mac OS X instead install osxfuse from https://osxfuse.github.io/
• Python >= 2.7
• OpenMP

You can use the following commands to install these requirements

    # Ubuntu
    $ sudo apt-get install git g++ cmake make libcurl4-openssl-dev libboost-filesystem-dev libboost-system-dev libboost-chrono-dev libboost-program-options-dev libboost-thread-dev libssl-dev libfuse-dev python

    # Fedora
    sudo dnf install git gcc-c++ cmake make libcurl-devel boost-devel boost-static openssl-devel fuse-devel python

    # Macintosh
    brew install cmake boost openssl libomp

Build & Install

1. Clone repository

   $ git clone https://github.com/cryfs/cryfs.git cryfs
   $ cd cryfs
   

2. Build

   $ mkdir cmake && cd cmake
   $ cmake ..
   $ make
   

3. Install

   $ sudo make install
   

You can pass the following variables to the cmake command (using -Dvariablename=value):

• -DCMAKE_BUILD_TYPE=[Release|Debug]: Whether to run code optimization or add debug symbols. Default: Release
• -DBUILD_TESTING=[on|off]: Whether to build the test cases (can take a long time). Default: off
• -DCRYFS_UPDATE_CHECKS=off: Build a CryFS that doesn't check online for updates and security vulnerabilities.

Building on Windows (experimental)

Build with Visual Studio 2017 and pass in the following flags to CMake:

-DDOKAN_PATH=[dokan library location, e.g. "C:\Program Files\Dokan\DokanLibrary-1.1.0"] -DBOOST_ROOT=[path to root of boost installation]

Troubleshooting

On most systems, CMake should find the libraries automatically. However, that doesn't always work.

1. Boost headers not found

   Pass in the boost include path with

    cmake .. -DBoost_INCLUDE_DIRS=/path/to/boost/headers
   

   If you want to link boost dynamically (e.g. you don't have the static libraries), use the following:

    cmake .. -DBoost_USE_STATIC_LIBS=off
   

2. Fuse/Osxfuse library not found

   Pass in the library path with

    cmake .. -DFUSE_LIB_PATH=/path/to/fuse/or/osxfuse
   

3. Fuse/Osxfuse headers not found

   Pass in the include path with

    cmake .. -DCMAKE_CXX_FLAGS="-I/path/to/fuse/or/osxfuse/headers"
   

4. Openssl headers not found

   Pass in the include path with

    cmake .. -DCMAKE_C_FLAGS="-I/path/to/openssl/include"
   

5. OpenMP not found (osx)

   Either build it without OpenMP

    cmake .. -DDISABLE_OPENMP=on
   

   but that will cause slower file system mount times (performance after mounting will be unaffected). If you installed OpenMP with homebrew or macports, it should be autodetected. If that doesn't work for some reason (or you want to use a different installation than the autodetected one), pass in these flags:

    cmake .. -DOpenMP_CXX_FLAGS='-Xpreprocessor -fopenmp -I/path/to/openmp/include' -DOpenMP_CXX_LIB_NAMES=omp -DOpenMP_omp_LIBRARY=/path/to/libomp.dylib
   

Creating .deb and .rpm packages

There are additional requirements if you want to create packages. They are:

• CMake version >= 3.3
• rpmbuild for creating .rpm package

1. Clone repository

   $ git clone https://github.com/cryfs/cryfs.git cryfs
   $ cd cryfs
   

2. Build

   $ mkdir cmake && cd cmake
   $ cmake .. -DCMAKE_BUILD_TYPE=Release -DBUILD_TESTING=off
   $ make package
   

Disclaimer

On the event of a password leak, you are strongly advised to create a new filesystem and copy all the data over from the previous one. Done this, all copies of the compromised filesystem and config file must be removed (e.g, from the "previous versions" feature of your cloud system) to prevent access to the key (and, as a result, your data) using the leaked password.