From 586ebd520657eaed361968c55c1ef3e268cf5053 Mon Sep 17 00:00:00 2001
From: Dmitry Belyavskiy <beldmit@gmail.com>
Date: Fri, 15 Jun 2018 13:53:27 +0300
Subject: [PATCH] Bugfix - copy dgst context

---
 gost_omac.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gost_omac.c b/gost_omac.c
index 23872bc..fa7ab74 100644
--- a/gost_omac.c
+++ b/gost_omac.c
@@ -89,6 +89,10 @@ int omac_imit_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from)
 		{
 			return 0;
 		}
+		if (c_to->cmac_ctx == c_from->cmac_ctx)
+		{
+			return 1;
+		}
 		return CMAC_CTX_copy(c_to->cmac_ctx, c_from->cmac_ctx);
 }
 
-- 
2.39.2