Use indirection to implement the default KeyStore

src/env/test/mod.rs

@@ -16,6 +16,7 @@ use self::upgrade_storage::BufferUpgradeStorage;
 use crate::api::connection::{HidConnection, SendOrRecvResult, SendOrRecvStatus};
 use crate::api::customization::DEFAULT_CUSTOMIZATION;
 use crate::api::firmware_protection::FirmwareProtection;
+use crate::api::key_store;
 use crate::api::user_presence::{UserPresence, UserPresenceResult};
 use crate::clock::ClockInt;
 use crate::env::Env;
@@ -147,6 +148,8 @@ impl FirmwareProtection for TestEnv {
     }
 }
 
+impl key_store::Helper for TestEnv {}
+
 impl Env for TestEnv {
     type Rng = TestRng256;
     type UserPresence = TestUserPresence;