modified structure

[avr-crypto-lib.git] / arcfour.c

diff --git a/arcfour.c b/arcfour.c
deleted file mode 100644 (file)
index e07193f..0000000
--- a/arcfour.c
+++ /dev/null
@@ -1,63 +0,0 @@
-/* arcfour.c */
-/*
-    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:        arcfour.c
- * Author:      Daniel Otte
- * email:       daniel.otte@rub.de
- * Date:        2006-06-07
- * License:     GPLv3 or later
- * Description: Implementation of the ARCFOUR (RC4 compatible) stream cipher algorithm.
- *
- */
-
-#include <stdint.h>
-#include "arcfour.h"
-
-/*
- * length is length of key in bytes!
- */
-
-void arcfour_init(const void *key, uint8_t length_B, arcfour_ctx_t *ctx){
-       uint8_t t;
-       uint16_t x,y=0;
-       for(x=0; x<= 255; ++x)
-               ctx->s[x]=x;
-
-       for(x=0; x<= 255; ++x){
-               y += ctx->s[x] + ((uint8_t*)key)[x % length_B];
-               y &= 0xff;
-               /* ctx->s[y] <--> ctx->s[x] */
-               t = ctx->s[y];
-               ctx->s[y] = ctx->s[x];
-               ctx->s[x] = t;
-       }
-       ctx->i = ctx->j = 0;
-}
-
-uint8_t arcfour_gen(arcfour_ctx_t *ctx){
-       uint8_t t;
-       ctx->i++;
-       ctx->j += ctx->s[ctx->i];
-       /* ctx->s[i] <--> ctx->s[j] */
-       t = ctx->s[ctx->j];
-       ctx->s[ctx->j] = ctx->s[ctx->i];
-       ctx->s[ctx->i] = t;
-       return ctx->s[(ctx->s[ctx->j] + ctx->s[ctx->i]) & 0xff];
-}
-