If a hash core can't restore state, use a soft core instead.

1 files changed, 5 insertions, 3 deletions

diff --git a/hash.c b/hash.c
index 2a63900..a496e87 100644
--- a/hash.c
+++ b/hash.c
@@ -4,8 +4,9 @@
  * HAL interface to Cryptech hash cores.
  *
  * Authors: Joachim Strömbergson, Paul Selkirk, Rob Austein
- * Copyright (c) 2014-2018, NORDUnet A/S
- * All rights reserved.
+ * Copyright (c) 2014-2018, NORDUnet A/S All rights reserved.
+ * Copyright: 2020, The Commons Conservancy Cryptech Project
+ * SPDX-License-Identifier: BSD-3-Clause
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
@@ -384,7 +385,8 @@ static inline hal_error_t check_core(hal_core_t **core,
   if (*core != NULL)
     return HAL_OK;
 
-  if ((err = hal_core_alloc(descriptor->core_name, core, pomace)) == HAL_OK) {
+  if (descriptor->can_restore_state &&
+      (err = hal_core_alloc(descriptor->core_name, core, pomace)) == HAL_OK) {
     *flags |= STATE_FLAG_FREE_CORE;
     return HAL_OK;
   }