Enable SSH remotes in native frontends (#117)

crates/storage/src/authentication.rs

@@ -406,6 +406,22 @@ impl<B: SecretStoreBackend, C: AuthenticationClock> AuthenticationHandle<B, C> {
             .store_openpgp_passphrase(&reference, value)
             .map_err(Into::into)
     }
+
+    /// Persist a passphrase that a completed SSH operation proved could
+    /// unlock and authenticate the configured private key.
+    pub fn persist_verified_ssh_passphrase(
+        &self,
+        fingerprint: &crate::config::SshFingerprint,
+        value: SecretBytes,
+    ) -> Result<(), AuthenticationError> {
+        let _operation = self.shared.operation()?;
+        self.shared.expire_if_needed()?;
+        self.shared.with_active(self.generation, |_| ())?;
+        self.shared
+            .store
+            .persist_verified_ssh_passphrase(fingerprint, value)
+            .map_err(Into::into)
+    }
 }
 
 impl<B: SecretStoreBackend, C: AuthenticationClock> SecretProvider for AuthenticationHandle<B, C> {