Used curve is incorrect

[dynamix]

The example uses p256 but Apple requires p192.

[egorlitvinenko]

Confirmed https://developer.apple.com/documentation/storekit/skadnetwork/registering_an_ad_network

However, it looks like they changed the docs.

[dynamix]

They did, which is annoying because the key we submitted in the beginning used secp256r1. The choice of prime192v1 is questionable and I wrote them about it (nobody uses it, not all libs support it, it is considered not very secure, more hash digest than bits in the curve ...)

[danielxt7]

thanks @dynamix - yep, we also suspect this changed... we are updating the repo to use prime192v1 - thx!

[bzarzoza]

that guidance has changed once again to prime256v1

old: http://web.archive.org/web/20200920102544if_/https://developer.apple.com/documentation/storekit/skadnetwork/registering_an_ad_network new: https://developer.apple.com/documentation/storekit/skadnetwork/registering_an_ad_network

[fmaschmeier]

change to p192 plus a note in readme to highlight necessary equality in keypair and adserver -> addressed with #10