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/entropy_poll.c

diff --git a/library/entropy_poll.c b/library/entropy_poll.c
index 1fe4e81..acecd9b 100644
--- a/library/entropy_poll.c
+++ b/library/entropy_poll.c
@@ -37,6 +37,7 @@
 
 #include "mbedtls/entropy.h"
 #include "mbedtls/entropy_poll.h"
+#include "mbedtls/platform_util.h"
 
 #if defined(MBEDTLS_TIMING_C)
 #include "mbedtls/timing.h"
@@ -188,7 +189,7 @@
     if( len < sizeof(unsigned long) )
         return( 0 );
 
-    memcpy( output, &timer, sizeof(unsigned long) );
+    mbedtls_platform_memcpy( output, &timer, sizeof(unsigned long) );
     *olen = sizeof(unsigned long);
 
     return( 0 );
@@ -227,7 +228,7 @@
     if( len < use_len )
       use_len = len;
 
-    memcpy( output, buf, use_len );
+    mbedtls_platform_memcpy( output, buf, use_len );
     *olen = use_len;
 
     return( 0 );