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README.md

PolyPseudo

Installation

Make sure you have installed OpenSSL 1.0.2+.

$ brew install openssl

Add this line to your application's Gemfile:

gem 'poly_pseudo'

And then execute:

$ bundle

Or install it yourself as:

$ gem install poly_pseudo

Usage

require 'poly_pseudo'

identity_key   = PolyPseudo::Util.read_key(File.read('EI_Decryption.pem'))
decryption_key = PolyPseudo::Util.read_key(File.read('EP_Decryption.pem'))
closing_key    = PolyPseudo::Util.read_key(File.read('EP_Closing.pem'))

encoded_asn1 = <<-BASE64
MIIBVAYMYIQQAYdrg+MFAQIBAgEBAgEBFhQwMDAwMDAwNDAwMzIxNDM0NTAwMRYU
MDAwMDAwMDMyNzMyMjYzMTAwMDACBAEzok4wgfkEUQQdTrTmvUoznOB+4bGfted+
sc7mnN2M2k9T/c2ZXvOYf8CwniAsnxVgzTzsoEpg8NRJq6aBjFCyBz3NwOulwrNE
4/Q+2v0eE6R9Cvd8ngeL7QRRBEybIwRxjf6/9xWlMSg3aINSJf2GQaJjkp+uQudg
slmExVSUUidHeS4rRqh7MEiOulqAYF6UkvXFYCUGU7DRScIxGf8xPYmULaYnMSle
cpeMBFEElI6gAq+crdUFVzkF7bNFX+tEUIiGvc7daUbYpoatwogyGveoPvgOt3MC
t38iHgW3leqaRomZgNHbjQEgCCy/2VJgdwQYDSs/j++K1KtUMOgEEAAAAAAAAAAA
AAAAAAAAAAA=
BASE64

identity_or_pseudonym = PolyPseudo::PseudoId.from_asn1(encoded_asn1)

case identity_or_pseudonym
when PolyPseudo::Identity
    identity_or_pseudonym.decrypt(identity_key)
when PolyPseudo::Pseudonym
    identity_or_pseudonym.decrypt(decryption_key, closing_key)
end

puts identity_or_pseudonym.pseudo_id

Caveats

OpenSSL 1.0.2 is required. On OSX the default openssl is not capable of handling the Brainpool curves. If you installed openssl via homebrew, chances are it's not correctly configured for FFI. You will probably get a segmentation fault if you don't have the correct version.

You can configure the openssl library location using the config

PolyPseudo.configure do |config|
  config.ffi_lib = '/usr/local/opt/openssl/lib/libssl.dylib'
end

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake test to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/digidentity/poly_pseudo.

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