migrate make-credential entirely over to the crypto backend

Author: Progdrasil

passkey-authenticator/src/authenticator/make_credential.rs

@@ -1,4 +1,3 @@
-use p256::SecretKey;
 use passkey_crypto::{
     CryptoBackend,
     rng::{Rng, RngBackend},
@@ -118,10 +117,10 @@ where
         // 9. Generate a new credential key pair for the algorithm specified.
         let credential_id = Rng::random_vec(self.credential_id_length.into());
 
-        let private_key = {
-            let mut rng = Rng::new();
-            SecretKey::random(&mut rng)
-        };
+        let private_key = self
+            .crypto
+            .generate_key(algorithm)
+            .map_err(|_| Ctap2Error::UnsupportedAlgorithm)?;
 
         let extensions = self.make_extensions(input.extensions, flags.contains(Flags::UV))?;
 

passkey-authenticator/src/ctap2.rs

@@ -54,7 +54,7 @@ impl<S, U, C> Ctap2Api for Authenticator<S, U, C>
 where
     S: CredentialStore + Sync + Send,
     U: UserValidationMethod<PasskeyItem = <S as CredentialStore>::PasskeyItem> + Sync + Send,
-    C: CryptoBackend + Sync + Send,
+    C: CryptoBackend<SecretKey: Sync + Send> + Sync + Send,
 {
     async fn get_info(&self) -> Box<get_info::Response> {
         Authenticator::get_info(self).await