We'd love to accept your patches and contributions to this project. There are just a few small guidelines you need to follow.
The files in src/crypto are pulled from external git repositories. They are not submoduled so that this repo can be exported as an Arduino library. If you want to modify prng.*, modify it directly in this repo. If you want to modify other file either modify them using pull_crypto.sh, or modify them in the repos they are pulled from.
Contributions to this project must be accompanied by a Contributor License Agreement. You (or your employer) retain the copyright to your contribution; this simply gives us permission to use and redistribute your contributions as part of the project. Head over to https://cla.developers.google.com/ to see your current agreements on file or to sign a new one.
You generally only need to submit a CLA once, so if you've already submitted one (even if it was for a different project), you probably don't need to do it again.
All submissions, including submissions by project members, require review. We use GitHub pull requests for this purpose. Consult GitHub Help for more information on using pull requests.
This project follows Google's Open Source Community Guidelines.