PsshBox

A builder for PSSH boxes used in content encryption, as per the specification at https://w3c.github.io/encrypted-media/format-registry/initdata/cenc.html.

The implementation was based on the the Shaka-Packager PSSH tool available at https://github.com/google/shaka-packager/tree/master/packager/tools/pssh. The tool was used to generate & validate the unit test values.

Installation

Add this line to your application's Gemfile:

gem 'pssh_box'

And then execute:

$ bundle

Or install it yourself as:

$ gem install pssh_box

Usage

A version 0 PSSH box can be generated with:

PsshBox::Builder.build_pssh_box(0, 'edef8ba9-79d6-4ace-a3c8-27dcd51d21ed', pssh_data_bytes)

A version 1 PSSH box can be generated with:

PsshBox::Builder.build_pssh_box(1, 'edef8ba9-79d6-4ace-a3c8-27dcd51d21ed', pssh_data_bytes, [key_id])

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec 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/[USERNAME]/pssh_box. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

License

The gem is available as open source under the terms of the MIT License.

Code of Conduct

Everyone interacting in the PsshBox project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.