2fa PGP Addon for XENFORO

Hello, I am looking for a person who can develop an addon adapted to xenforo. The functionality of the addon will be 2fa two-factor authentication by pgp key. explanations:    When registering, the member enters his PGP public key and at each connection once the ID and password have been entered, a random code encrypted with the member's public key appears in a box and he must decrypt it with his private key and then enter the code obtained in the response part of the box and validate. Only once this has been done can he access the [login to view URL] addon must also allow automatic encryption of all personal messages in PGP between the participants in the private conversation. what I don't want:   - No SMS or QR code system   - No elements or other part using or requiring google or its derivatives    - No javascript
 thank you