feat: update pkcs11 piv

native-pkcs11-piv/src/piv/backend.rs

@@ -15,6 +15,7 @@
 use std::sync::Arc;
 
 use tracing::instrument;
+use yubikey::YubiKey;
 
 use native_pkcs11_traits::{Backend, KeySearchOptions};
 use native_pkcs11_traits::Certificate as P11Certificate;
@@ -25,11 +26,15 @@ use native_pkcs11_traits::PublicKey as P11PublicKey;
 use native_pkcs11_traits::Result as P11Result;
 
 #[derive(Debug, Default)]
-pub struct YubikeyPivBackend;
+pub struct YubikeyPivBackend {
+    yubikey: Option<YubiKey>,
+}
 
 impl YubikeyPivBackend {
     pub fn new() -> Self {
-        Self
+        YubikeyPivBackend {
+            yubikey: None
+        }
     }
 }