Ory is the largest open source community in the world for cloud software application security. We maintain advanced open source security software solving authentication, authorization, access control, application network security, and delegation. Ory implements a variety of industry and best-practice standards including OAuth 2.0 / OAuth 2.1, OpenID Connect, Zero Trust Networking, Google Zanzibar Policy Framework, FIDO2 U2F, WebAuthn, TOTP, and more.

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Is it possible for Oathkeeper to include <https://datatracker.ietf.org/doc/html/rfc7517#section-4.7|x5c> in the JWK? We have existing logic in our backend that uses this field for JWT validation and it's currently missing in the JWK that Oathkeeper generates.

Figured it out after reading more into the spec . Need to find a CLI way of doing this, but for those interested:
• Go to <https://mkjwk.org/> and generate a public/private key set with "Show X.509" cert enabled.
• Take the self-signed cert value (without "BEGIN/END CERTIFICATE) and create a new field in the key set:
```"x5c": ["SELF-SIGNED-CERT-VALUE"]```
And that's it! Oathkeeper will now provide the `x5c` field in the JWK payload and services will be able to successfully validate tokens using this field. Hope this is helpful.