insereated GPLv3 stub

[avr-crypto-lib.git] / hmac-sha256.h

diff --git a/hmac-sha256.h b/hmac-sha256.h
index 9bdd560d0432ffb60df33f4f87774ef31ee61ff5..00e00c2d383aca8991c1cc1d52d1d73b626e88a0 100644 (file)
--- a/hmac-sha256.h
+++ b/hmac-sha256.h
@@ -1,10 +1,28 @@
+/* hmac-sha256.h */
+/*
+    This file is part of the Crypto-avr-lib/microcrypt-lib.
+    Copyright (C) 2008  Daniel Otte (daniel.otte@rub.de)
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
 #ifndef HMACSHA256_H_
 #define HMACSHA256_H_
 
 #include "sha256.h"
 
 #define HMAC_BITS SHA256_HASH_BITS
-#define HMAC_BYTES (HMAC_BITS/8)
+#define HMAC_BYTES ((HMAC_BITS+7)/8)
 
 typedef sha256_ctx_t hmac_sha256_ctx_t;