From 76ba5e8ede2320bc848814d70fb6001e88b58fa2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mikael=20=C3=85gren?= <mikael@tillitis.se>
Date: Thu, 10 Apr 2025 12:24:00 +0200
Subject: [PATCH] fw: Check blake2s_init return value

---
 hw/application_fpga/fw/tk1/auth_app.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/hw/application_fpga/fw/tk1/auth_app.c b/hw/application_fpga/fw/tk1/auth_app.c
index 185b909..6aad66b 100644
--- a/hw/application_fpga/fw/tk1/auth_app.c
+++ b/hw/application_fpga/fw/tk1/auth_app.c
@@ -24,7 +24,8 @@ static void calculate_auth_digest(uint8_t *nonce, uint8_t *auth_digest)
 	blake2s_ctx ctx = {0};
 
 	// Generate a 16 byte authentication digest
-	blake2s_init(&ctx, 16, NULL, 0);
+	int blake2err = blake2s_init(&ctx, 16, NULL, 0);
+	assert(blake2err == 0);
 	blake2s_update(&ctx, (const void *)cdi, 32);
 	blake2s_update(&ctx, nonce, 16);
 	blake2s_final(&ctx, auth_digest);