[Feature]: Passkey - Optimize P256 signature verification

[aramikm]

Details

Currently P256 signature verification is around 22 times heavier compared to a Sr25519 one in WASM and 6 times heavier in native code.
We would like to optimize the verification in WASM as much as possible to be closer to native one.

blocked by

• due to the details mentioned in https://substrate.stackexchange.com/questions/11690/custom-hosted-functions first we should be able to add these as hosted function into polkadot nodes.

Approach

• Checking host functions and API and see if can utilize

Searched for Related Issues

• I have done a search for related issues and either found none, or noted them