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/aesni.c

diff --git a/library/aesni.c b/library/aesni.c
index c5873fc..35b3d00 100644
--- a/library/aesni.c
+++ b/library/aesni.c
@@ -39,6 +39,7 @@
 #endif
 
 #include "mbedtls/aesni.h"
+#include "mbedtls/platform_util.h"
 
 #include <string.h>
 
@@ -261,7 +262,7 @@
     unsigned char *ik = invkey;
     const unsigned char *fk = fwdkey + 16 * nr;
 
-    memcpy( ik, fk, 16 );
+    mbedtls_platform_memcpy( ik, fk, 16 );
 
     for( fk -= 16, ik += 16; fk > fwdkey; fk -= 16, ik += 16 )
         asm( "movdqu (%0), %%xmm0       \n\t"
@@ -271,7 +272,7 @@
              : "r" (fk), "r" (ik)
              : "memory", "xmm0" );
 
-    memcpy( ik, fk, 16 );
+    mbedtls_platform_memcpy( ik, fk, 16 );
 }
 
 /*