From 14a678fe4542d7c400d0d68b2859c54f2246abe4 Mon Sep 17 00:00:00 2001
From: Caleb Garrett <47389035+caleb-garrett@users.noreply.github.com>
Date: Mon, 12 Feb 2024 20:33:04 -0500
Subject: [PATCH] Fixed HMAC blocking mode.

---
 embassy-stm32/src/hash/mod.rs | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/embassy-stm32/src/hash/mod.rs b/embassy-stm32/src/hash/mod.rs
index bae538b5f..b47814f8b 100644
--- a/embassy-stm32/src/hash/mod.rs
+++ b/embassy-stm32/src/hash/mod.rs
@@ -215,7 +215,7 @@ impl<'d, T: Instance, D> Hash<'d, T, D> {
                 self.accumulate_blocking(key);
                 T::regs().str().write(|w| w.set_dcal(true));
                 // Block waiting for digest.
-                while !T::regs().sr().read().dcis() {}
+                while !T::regs().sr().read().dinis() {}
             }
             ctx.key_sent = true;
         }
@@ -365,16 +365,16 @@ impl<'d, T: Instance, D> Hash<'d, T, D> {
         //Start the digest calculation.
         T::regs().str().write(|w| w.set_dcal(true));
 
-        // Block waiting for digest.
-        while !T::regs().sr().read().dcis() {}
-
         // Load the HMAC key if provided.
         if let Some(key) = ctx.key {
+            while !T::regs().sr().read().dinis() {}
             self.accumulate_blocking(key);
             T::regs().str().write(|w| w.set_dcal(true));
-            while !T::regs().sr().read().dcis() {}
         }
 
+        // Block until digest computation is complete.
+        while !T::regs().sr().read().dcis() {}
+
         // Return the digest.
         let digest_words = match ctx.algo {
             Algorithm::SHA1 => 5,