PRF + HMAC-Secret Extension support #210
Description
One of the major powers of pass keys is that it gives you a device secure (and often portable across devices with a password manager) private key that can be used to create hashes, and encrypt data.
It would be nice if there was a way to use this library to get access to the PRF and +HMAC-secret extensions which are supported on web, ios, macos and android.
Even if the library didn't directly support it, being able to get the right stuff that a package like: https://pub.dev/packages/signer could use would be super helpful.