modified structure

[avr-crypto-lib.git] / rc6 / rc6.h

diff --git a/rc6/rc6.h b/rc6/rc6.h
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+++ b/rc6/rc6.h
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+/* rc6.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:       rc6.h
+ * Author:     Daniel Otte
+ * Date:       06.08.2006
+ * License: GPL
+ * Description: Implementation of the RC6 cipher algorithm.
+ *     This implementation is restricted to 32-bit words, but free in the choice of number of rounds (0 to 255).
+ *     so it is RC6-32/r/b
+ */
+
+#ifndef RC6_H_
+#define RC6_H_
+
+ 
+#include <stdint.h>
+ 
+typedef struct rc6_ctx_st{
+       uint8_t         rounds;         /* specifys the number of rounds; default: 20 */
+       uint32_t*       S;                      /* the round-keys */
+} rc6_ctx_t;
+ 
+ 
+uint8_t rc6_init(void* key, uint16_t keylength_b, rc6_ctx_t *s);
+ 
+uint8_t rc6_initl(void* key, uint16_t keylength_b, uint8_t rounds, rc6_ctx_t *s);
+ 
+void rc6_enc(void* block, rc6_ctx_t *s);
+
+void rc6_dec(void* block, rc6_ctx_t *s);
+ 
+void rc6_free(rc6_ctx_t *s); 
+
+#endif /* RC6_H_ */
+