commit ac6d2269393f699a303e858913586b731630c6bf
author Arto Kinnunen <arto.kinnunen@arm.com> Thu Jan 09 10:11:20 2020 +0200
committer Arto Kinnunen <arto.kinnunen@arm.com> Thu Jan 09 10:19:07 2020 +0200
tree 25dbe398101867f4b40e4eead4a74106fb834aa5
parent 7195571681ec4793f04758ee0ec55de418d2bb69

Update signature of mbedtls_platform_random_delay

Skip parameter and return value from mbedtls_platform_random_delay
to make it more resistant for FI attacks.

library/ssl_srv.c

diff --git a/library/ssl_srv.c b/library/ssl_srv.c
index 2ba1c19..bab8f00 100644
--- a/library/ssl_srv.c
+++ b/library/ssl_srv.c
@@ -4064,7 +4064,7 @@
 
     if( pmscounter == ssl->handshake->pmslen )
     {
-        mbedtls_platform_random_delay(50);
+        mbedtls_platform_random_delay();
         if( pmscounter == ssl->handshake->pmslen )
         {
             ssl->handshake->premaster_generated = MBEDTLS_SSL_FI_FLAG_SET;
@@ -4651,7 +4651,7 @@
 
     if( ret == 0 )
     {
-        mbedtls_platform_random_delay(50);
+        mbedtls_platform_random_delay();
 
         if( ret == 0 )
         {