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[avr-crypto-lib.git] / serpent / serpent.h

diff --git a/serpent/serpent.h b/serpent/serpent.h
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+/* serpent.h */
+/*
+    This file is part of the AVR-Crypto-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/>.
+*/
+/** \file   serpent.h
+ * \author  Daniel Otte
+ * \license GPLv3
+ * \brief a implementation of the serpent cipher for avr microcontrollers
+ */
+
+#ifndef SERPENT_H_
+#define SERPENT_H_
+
+#include <stdint.h>
+
+typedef uint32_t serpent_subkey_t[4];
+
+typedef struct serpent_ctx_st {
+       serpent_subkey_t k[33];
+}  serpent_ctx_t;
+
+#define SERPENT_KEY128 128
+#define SERPENT_KEY192 192
+#define SERPENT_KEY256 256
+
+
+/* key must be 256bit (32 byte) large! */
+void serpent_init(const void* key, uint16_t keysize_b, serpent_ctx_t* ctx);
+void serpent_enc(void* buffer, const serpent_ctx_t* ctx);
+void serpent_dec(void* buffer, const serpent_ctx_t* ctx);
+
+
+#endif /*SERPENT_H_*/