commit 7195571681ec4793f04758ee0ec55de418d2bb69
author Arto Kinnunen <arto.kinnunen@arm.com> Fri Jan 03 14:26:20 2020 +0200
committer Arto Kinnunen <arto.kinnunen@arm.com> Tue Jan 07 10:47:58 2020 +0200
tree 790e0944c143f7e3b3b2d54fbf3e9c361e982653
parent e91f0dc905dde1177140de4452601883dca84d63

Replace mbedtls_platform_enforce_volatile_reads 2

Replace remaining mbedtls_platform_enforce_volatile_reads() with
mbedtls_platform_random_delay().

library/entropy.c

diff --git a/library/entropy.c b/library/entropy.c
index b4d1f29..8d42dd7 100644
--- a/library/entropy.c
+++ b/library/entropy.c
@@ -273,7 +273,7 @@
         volatile int strong_fi = ctx->source[i].strong;
         if( strong_fi == MBEDTLS_ENTROPY_SOURCE_STRONG )
         {
-            mbedtls_platform_enforce_volatile_reads();
+            mbedtls_platform_random_delay(50);
 
             if( strong_fi == MBEDTLS_ENTROPY_SOURCE_STRONG )
                 have_one_strong_fi = MBEDTLS_ENTROPY_SOURCE_STRONG;
@@ -305,7 +305,7 @@
 
     if( have_one_strong_fi == MBEDTLS_ENTROPY_SOURCE_STRONG )
     {
-        mbedtls_platform_enforce_volatile_reads();
+        mbedtls_platform_random_delay(50);
         if( have_one_strong_fi == MBEDTLS_ENTROPY_SOURCE_STRONG )
         {
             return( ret );