modified structure

[avr-crypto-lib.git] / rc5 / rc5.h

diff --git a/rc5/rc5.h b/rc5/rc5.h
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+++ b/rc5/rc5.h
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+/* rc5.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/>.
+*/
+/* rc5.h a C implementation of RC5 for AVR microcontrollers
+ * 
+ * author: Daniel Otte 
+ * email:  daniel.otte@rub.de
+ * license: GPLv3
+ * 
+ * this implementation is limited to 64bit blocks and a maximum of 255 rounds
+ * 
+ */
+#ifndef RC5_H_
+#define RC5_H_
+
+
+#include <stdint.h>
+#include <stdlib.h> /* malloc() & free() */
+#include <string.h> /* memset() & memcpy() */
+ 
+typedef struct rc5_ctx_st {
+       uint8_t rounds;
+       uint32_t *s;
+}rc5_ctx_t; 
+
+void rc5_enc(void* buffer, const rc5_ctx_t* ctx);
+void rc5_dec(void* buffer, const rc5_ctx_t* ctx);
+void rc5_init(void* key, uint16_t keysize_b, uint8_t rounds, rc5_ctx_t* ctx);
+void rc5_free(rc5_ctx_t* ctx);
+
+#endif /*RC5_H_*/