From 788aad117efe232ce1608cd6eb0bde23c2e87fb9 Mon Sep 17 00:00:00 2001
From: Gerard Wagener <gerard.wagener@circl.lu>
Date: Thu, 20 Dec 2018 14:55:49 +0100
Subject: [PATCH] chg: [client] Reset HMAC for each d4 packet

---
 client/d4.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/client/d4.c b/client/d4.c
index 803058f..5edc954 100644
--- a/client/d4.c
+++ b/client/d4.c
@@ -200,6 +200,8 @@ void d4_transfert(d4_t* d4)
             d4_update_header(d4, nread);
             //Do HMAC on header and payload. HMAC field is 0 during computation
             if (d4->ctx) {
+                bzero(d4->ctx,sizeof(hmac_sha256_ctx));
+                hmac_sha256_init(d4->ctx, (uint8_t*)d4->conf[KEY], strlen(d4->conf[KEY]));
                 hmac_sha256_update(d4->ctx, (const unsigned char*)&d4->header,
                                sizeof(d4_header_t));
                 hmac_sha256_update(d4->ctx, (const unsigned char*)buf, nread);