ctc_aes.h

00001 /* ctc_aes.h
00002  *
00003  * Copyright (C) 2006-2009 Sawtooth Consulting Ltd.
00004  *
00005  * This file is part of CyaSSL.
00006  *
00007  * CyaSSL is free software; you can redistribute it and/or modify
00008  * it under the terms of the GNU General Public License as published by
00009  * the Free Software Foundation; either version 2 of the License, or
00010  * (at your option) any later version.
00011  *
00012  * CyaSSL is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  * GNU General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU General Public License
00018  * along with this program; if not, write to the Free Software
00019  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
00020  */
00021 
00022 #ifndef NO_AES
00023 
00024 #ifndef CTAO_CRYPT_AES_H
00025 #define CTAO_CRYPT_AES_H
00026 
00027 
00028 #include "types.h"
00029 
00030 #ifdef CYASSL_AESNI
00031 
00032 #include <wmmintrin.h>
00033 
00034 #if !defined (ALIGN16)
00035     #if defined (__GNUC__)
00036         #define ALIGN16 __attribute__ ( (aligned (16)))
00037     #elif defined(_MSC_VER)
00038         #define ALIGN16 __declspec (align (16))
00039     #else
00040         #define ALIGN16
00041     #endif
00042 #endif
00043 
00044 #endif /* CYASSL_AESNI */
00045 
00046 #if !defined (ALIGN16)
00047     #define ALIGN16
00048 #endif
00049 
00050 #ifdef __cplusplus
00051     extern "C" {
00052 #endif
00053 
00054 
00055 enum {
00056     AES_ENCRYPTION = 0,
00057     AES_DECRYPTION = 1,
00058     AES_BLOCK_SIZE = 16
00059 };
00060 
00061 
00062 typedef struct Aes {
00063     /* AESNI needs key first, rounds 2nd, not sure why yet */
00064     ALIGN16 word32 key[60];
00065     word32  rounds;
00066 
00067     ALIGN16 word32 reg[AES_BLOCK_SIZE / sizeof(word32)];      /* for CBC mode */
00068     ALIGN16 word32 tmp[AES_BLOCK_SIZE / sizeof(word32)];      /* same         */
00069 } Aes;
00070 
00071 
00072 int  AesSetKey(Aes* aes, const byte* key, word32 len, const byte* iv, int dir);
00073 void AesCbcEncrypt(Aes* aes, byte* out, const byte* in, word32 sz);
00074 void AesCbcDecrypt(Aes* aes, byte* out, const byte* in, word32 sz);
00075 
00076 
00077 #ifdef __cplusplus
00078     } /* extern "C" */
00079 #endif
00080 
00081 
00082 #endif /* CTAO_CRYPT_AES_H */
00083 #endif /* NO_AES */
00084