I’m working on a Content Security Policy parser. There are a handful of them around the web, but I couldn’t find one that implemented the entirety of the CSP spec and I wanted something I could use to verify structure and validity of CSP directives.

https://github.com/damien/content-security-policy/tree/main/...

Once I’m happy with my take on a reference implementation I’m hoping to create some tooling with it to do some interesting analysis of CSP abstract syntax trees to identify things like policy anti patterns, reporting on capabilities a policy grants to a domain/resource, and a better mechanism for allowing tools like OPA, SemGrep, etc. to define and enforce rules on a policy.