SEC: Add hash function interface

git-svn-id: https://src.develer.com/svnoss/bertos/trunk@4284 38d2e660-2303-0410-9eaa-f027e97ec537

diff --git a/bertos/sec/hash.h b/bertos/sec/hash.h
new file mode 100644 (file)
index 0000000..4601e7e
--- /dev/null
+++ b/bertos/sec/hash.h
@@ -0,0 +1,81 @@
+/**
+ * \file
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos 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 2 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction.  Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License.  This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2010 Develer S.r.l. (http://www.develer.com/)
+ *
+ * -->
+ *
+ * \brief Generic interface for hashing algorithms.
+ * \author Giovanni Bajo <rasky@develer.com>
+ * 
+ */
+
+#ifndef SEC_HASH_H
+#define SEC_HASH_H
+
+#include <cfg/compiler.h>
+#include <cfg/debug.h>
+
+typedef struct Hash
+{
+       void (*begin)(struct Hash *h);
+       void (*update)(struct Hash *h, const void *data, size_t len);
+       uint8_t* (*final)(struct Hash *h);
+       uint8_t digest_len;
+       uint8_t block_len;
+} Hash;
+
+INLINE void hash_begin(Hash *h)
+{
+       ASSERT(h->begin);
+       h->begin(h);
+}
+
+INLINE void hash_update(Hash *h, const void* data, size_t len)
+{
+       ASSERT(h->update);
+       h->update(h, data, len);
+}
+
+INLINE uint8_t* hash_final(Hash *h)
+{
+       ASSERT(h->final);
+       return h->final(h);
+}
+
+INLINE int hash_digest_len(Hash *h)
+{
+       return h->digest_len;
+}
+
+INLINE int hash_block_len(Hash *h)
+{
+       return h->block_len;
+}
+
+#endif /* SEC_HASH_H */