insereated GPLv3 stub

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

diff --git a/shabea.c b/shabea.c
index 844788a00defbe64c5a08ae6fb1d5c624e83e9f2..62ff6b4a27e72b5af76223f3e8c06f09bd2df6de 100644 (file)
--- a/shabea.c
+++ b/shabea.c
@@ -1,8 +1,26 @@
+/* shabea.c */
+/*
+    This file is part of the Crypto-avr-lib/microcrypt-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       shabea.c
  * \author     Daniel Otte 
  * \date       2007-06-07
- * \brief      SHABEA - a SHA Based Encrytion Algorithm implementation
+ * \brief      SHABEA - a SHA Based Encryption Algorithm implementation
  * \par License        
  * GPL
  * 
@@ -39,13 +57,12 @@ void memxor(uint8_t * dest, uint8_t * src, uint8_t length){
 #define R ((uint8_t*)block+16)
 void shabea256(void * block, void * key, uint16_t keysize, uint8_t enc, uint8_t rounds){
        int8_t r;               /**/
-       uint8_t *tb;    /**/
+       uint8_t tb[HALFSIZEB+2+(keysize+7)/8];  /**/
        uint16_t kbs;   /* bytes used for the key / temporary block */
        sha256_hash_t hash;
        
        r = (enc?0:(rounds-1));
        kbs = (keysize+7)/8;
-       tb = malloc(HALFSIZEB+2+kbs);
        memcpy(tb+HALFSIZEB+2, key, kbs); /* copy key to temporary block */
        tb[HALFSIZEB+0] = 0;    /* set round counter high value to zero */
        
@@ -63,7 +80,6 @@ void shabea256(void * block, void * key, uint16_t keysize, uint8_t enc, uint8_t
                        memxor(L, hash, HALFSIZE);      
                }
        }
-       free(tb);
 }