From 61345d0b6e06a5ce64a7145276355824eba5094d Mon Sep 17 00:00:00 2001
From: Jesper Louis Andersen <jesper.louis.andersen@gmail.com>
Date: Sun, 19 Jan 2020 12:08:05 +0100
Subject: [PATCH] Fix argument handling in generichash_final

If supplying 1 argument, it is in argv[0], not argv[1]
---
 c_src/generichash.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/c_src/generichash.c b/c_src/generichash.c
index f422578..9993bf7 100644
--- a/c_src/generichash.c
+++ b/c_src/generichash.c
@@ -258,7 +258,7 @@ ERL_NIF_TERM enacl_crypto_generichash_final(ErlNifEnv *env, int argc,
 
   if (argc != 1)
     goto bad_arg;
-  if (!enif_get_resource(env, argv[1], enacl_generic_hash_ctx_rtype,
+  if (!enif_get_resource(env, argv[0], enacl_generic_hash_ctx_rtype,
                          (void **)&obj))
     goto bad_arg;