From 6512193efff3b0be6ba144b8a0b4d7ec63099cb8 Mon Sep 17 00:00:00 2001
From: Andres Amaya Garcia <Andres.AmayaGarcia@arm.com>
Date: Wed, 5 Jul 2017 15:45:47 +0100
Subject: [PATCH] Zeroize tmp buffer in entropy_update()

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

diff --git a/library/entropy.c b/library/entropy.c
index e6da98b10..90d09ebb1 100644
--- a/library/entropy.c
+++ b/library/entropy.c
@@ -195,6 +195,8 @@ static int entropy_update( mbedtls_entropy_context *ctx, unsigned char source_id
     mbedtls_sha256_update( &ctx->accumulator, p, use_len );
 #endif
 
+    mbedtls_zeroize( tmp, sizeof( tmp ) );
+
     return( 0 );
 }