forgotten files

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

diff --git a/serpent.h b/serpent.h
index e72178d6956b8e4bcfda804aa022af7f17a662bc..84e4a87c265714a2be10509879712076093350a3 100644 (file)
--- a/serpent.h
+++ b/serpent.h
@@ -1,7 +1,25 @@
-/* serpent.h
- * a bitsliced implementation of the serpent cipher for avr microcontrollers
- * author: Daniel Otte
- * license: GPLv3
+/* 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_
@@ -9,16 +27,21 @@
 
 #include <stdint.h>
 
-typedef uint8_t serpent_subkey_t[16];
+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_genctx(void * key, serpent_ctx_t * ctx);
-void serpent_enc(void * buffer, serpent_ctx_t * ctx);
-void serpent_dec(void * buffer, serpent_ctx_t * ctx);
+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_*/