This is a Ruby implementation of the AFsplitter used by cryptsetup
when storing encrypted key data in a LUKS volume header.
There are two implementations:
- A version using FFI bindings to the AFsplitter library;
- A pure Ruby implementation.
RubyGems: https://rubygems.org/gems/afsplitter Github: https://github.com/johnlane/afsplitter
Add this line to your application's Gemfile:
gem 'afsplitter'
And then execute:
$ bundle
Or install it yourself as:
$ gem install afsplitter
Using the FFI version requires the libafsplit.so
AFSPlitter library to
be installed in the system's library search path (typically in the /usr/lib
directory) but it is not included in this package.
The library source code can be downloaded from the official website or from Git:
$ git clone https://github.com/johnlane/libafsplit
To build the library
$ cd libafsplit
$ make
$ cp libafsplit.so /usr/lib
The official version is AFsplitter-0.1.tar.bz2 ( SHA1: baf2857b3c87f369a36a67bb8603a6c417eba43e)
Note: the official version's Makefile
only builds a stand-alone test executable; it does not
build the libafsplit.so
library. The Makefile in the Git repository builds the
shared library, however.
For the FFI implementation
require 'afsplitter_ffi'
For the Ruby implementation:
require 'afsplitter'
Then, to split
str_split = Afsplitter.split(str, iterations)
And to merge:
str_merged = Afsplitter.merge(str_split, iterations)
Which should result in
str_merged == str
Refer to the tests in the test
subdirectory for working examples.
There are two tests:
test_afsplitter.rb
split and merge test using the native Ruby implementation.test_afsplitter_ffi.rb
split and merge test using thelibafsplit.so
FFI implementation.
To run all tests
$ rake
To run individual tests
$ rake native
$ rake ffi
MIT License: see the LICENSE.txt
file.
The libafsplit.so
library is licensed as described on its web site.
- Fork it ( https://github.com/johnlane/afsplitter )
- Create your feature branch (
git checkout -b my-new-feature
) - Commit your changes (
git commit -am 'Add some feature'
) - Push to the branch (
git push origin my-new-feature
) - Create a new Pull Request