From c381444c7f033cbc5968069ed28795ac6933c091 Mon Sep 17 00:00:00 2001
From: Andres Amaya Garcia <andres.amayagarcia@arm.com>
Date: Wed, 12 Jul 2017 10:44:50 +0100
Subject: [PATCH] Zeroize tmp buf in mbedtls_mpi_fill_random()

---
 library/bignum.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/library/bignum.c b/library/bignum.c
index 4829d916b..e4a8dece5 100644
--- a/library/bignum.c
+++ b/library/bignum.c
@@ -1880,6 +1880,8 @@ int mpi_fill_random( mpi *X, size_t size,
     MPI_CHK( mpi_read_binary( X, buf, size ) );
 
 cleanup:
+    polarssl_zeroize( buf, sizeof( buf ) );
+
     return( ret );
 }