commit 91d79387619e0a4fe6a0cc6e045102820b1a18d1
author Teppo Järvelin <teppo.jarvelin@arm.com> Wed Oct 02 09:09:31 2019 +0300
committer Teppo Järvelin <teppo.jarvelin@arm.com> Wed Oct 30 14:07:04 2019 +0200
tree 2b9aeda258513183faab54cdc313c91e5ce989ff
parent aeecf04be3ab7939a93ad6ad613a1f74a56c21b7

Changed every memcpy to SCA equivalent mbedtls_platform_memcpy

This makes physical attacks more difficult.

library/hkdf.c

diff --git a/library/hkdf.c b/library/hkdf.c
index d64dc4d..8157632 100644
--- a/library/hkdf.c
+++ b/library/hkdf.c
@@ -177,7 +177,7 @@
         }
 
         num_to_copy = i != n ? hash_len : okm_len - where;
-        memcpy( okm + where, t, num_to_copy );
+        mbedtls_platform_memcpy( okm + where, t, num_to_copy );
         where += hash_len;
         t_len = hash_len;
     }