From 1949378d618c4cde3e8d4ebb5ca693ab6bbac435 Mon Sep 17 00:00:00 2001
From: Daniel Pouzzner <douzzer@wolfssl.com>
Date: Thu, 1 Oct 2020 14:02:22 -0500
Subject: [PATCH] wc_Chacha_purge_current_block(): init "scratch" buffer to
 zeros, to avoid "garbage value" warnings.

---
 wolfcrypt/src/chacha.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/wolfcrypt/src/chacha.c b/wolfcrypt/src/chacha.c
index 23fcf813a..b67d545ca 100644
--- a/wolfcrypt/src/chacha.c
+++ b/wolfcrypt/src/chacha.c
@@ -431,7 +431,7 @@ int wc_Chacha_Process(ChaCha* ctx, byte* output, const byte* input,
 
 void wc_Chacha_purge_current_block(ChaCha* ctx) {
     if (ctx->left > 0) {
-        byte scratch[CHACHA_CHUNK_BYTES];
+        byte scratch[CHACHA_CHUNK_BYTES] = {};
         (void)wc_Chacha_Process(ctx, scratch, scratch, CHACHA_CHUNK_BYTES - ctx->left);
     }
 }