From 44c82424faffa37a9324d627dbf52550c2f5b90f Mon Sep 17 00:00:00 2001
From: Vishal Mhatre <38512878+mhatrevi@users.noreply.github.com>
Date: Mon, 6 Jan 2025 15:55:25 -0800
Subject: [PATCH] [fix] Update emulator to copy the HMAC tag to the tag
 register array in CSR mode. (#1879)

---
 sw-emulator/lib/periph/src/hmac.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sw-emulator/lib/periph/src/hmac.rs b/sw-emulator/lib/periph/src/hmac.rs
index 5067123385..84b61ef26a 100644
--- a/sw-emulator/lib/periph/src/hmac.rs
+++ b/sw-emulator/lib/periph/src/hmac.rs
@@ -348,8 +348,10 @@ impl HmacSha {
             let mode512 = self.control.reg.is_set(Control::MODE);
 
             // If CSR mode is set, use the pre-defined key.
+            // Also reset the key_from_kv flag since the key is not read from the key-vault.
             if self.control.reg.is_set(Control::CSR_MODE) {
                 self.key = self.csr_key;
+                self.key_from_kv = false;
             }
 
             if self.control.reg.is_set(Control::INIT) {