From 17a616bec6aab0fedaae73e1dfe35e2555d1e7b3 Mon Sep 17 00:00:00 2001
From: Matt Borland <matt@mattborland.com>
Date: Mon, 4 Nov 2024 18:07:56 -0500
Subject: [PATCH] Fix memcpy

---
 include/boost/crypt/hash/hmac.hpp | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/include/boost/crypt/hash/hmac.hpp b/include/boost/crypt/hash/hmac.hpp
index a2edf8a..9982cf3 100644
--- a/include/boost/crypt/hash/hmac.hpp
+++ b/include/boost/crypt/hash/hmac.hpp
@@ -199,10 +199,9 @@ constexpr auto hmac<HasherType>::init(ForwardIter key, boost::crypt::size_t size
         
         BOOST_CRYPT_ASSERT(res.size() <= k0.size());
 
-        auto key_iter {res.begin()};
-        for (auto& byte : k0)
+        for (boost::crypt::size_t i {}; i < res.size(); ++i)
         {
-            byte = *key_iter++;
+            k0[i] = res[i];
         }
     }