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/**
* aes.h
*
* Copied from airpdcap_rijndael.h
*
* @version 3.0 (December 2000)
*
* Optimised ANSI C code for the Rijndael cipher (now AES)
*
* @author Vincent Rijmen <vincent.rijmen@esat.kuleuven.ac.be>
* @author Antoon Bosselaers <antoon.bosselaers@esat.kuleuven.ac.be>
* @author Paulo Barreto <paulo.barreto@terra.com.br>
*
* This code is hereby placed in the public domain.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ''AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/* Note: copied AirPDcap/rijndael/rijndael.h */
#ifndef _AES
#define _AES
#include "ws_symbol_export.h"
#define RIJNDAEL_MAXKC (256/32)
#define RIJNDAEL_MAXKB (256/8)
#define RIJNDAEL_MAXNR 14
typedef struct s_rijndael_ctx {
gint Nr; /* key-length-dependent number of rounds */
guint32 ek[4 * (RIJNDAEL_MAXNR + 1)]; /* encrypt key schedule */
guint32 dk[4 * (RIJNDAEL_MAXNR + 1)]; /* decrypt key schedule */
} rijndael_ctx;
WS_DLL_PUBLIC
void rijndael_set_key(
rijndael_ctx *ctx,
const guchar *key,
gint bits);
WS_DLL_PUBLIC
void rijndael_encrypt(
const rijndael_ctx *ctx,
const guchar *src,
guchar *dst);
WS_DLL_PUBLIC
void rijndael_decrypt(
const rijndael_ctx *ctx,
const guchar *src,
guchar *dst);
typedef struct s_aes_cmac_ctx {
rijndael_ctx aes;
guint key_len;
guint input_used;
guint8 state[RIJNDAEL_MAXKB];
guint8 input[RIJNDAEL_MAXKB];
} aes_cmac_ctx;
/**
* Initialize AES-CMAC calculation with the provided key.
* @param [OUT] ctx Context to initialize
* @param [IN] key Key to used
* @param [IN] key_len Key length in bytes
*/
WS_DLL_PUBLIC
void aes_cmac_encrypt_starts(
aes_cmac_ctx *ctx,
const guint8 *key,
guint key_len);
/**
* Add a new buffer for AES-CMAC calculation
* @param [IN] ctx Context (initialize with @ref AES_CMAC_encrypt_starts)
* @param [IN] input Buffer to add in AES-CMAC calculation
* @param [IN] length Length of input buffer (in bytes)
*/
WS_DLL_PUBLIC
void aes_cmac_encrypt_update(
aes_cmac_ctx *ctx,
const guint8 *input,
guint length);
/**
* Ends AES-CMAC calculation
* @param [IN] ctx Context (initialize with @ref AES_CMAC_encrypt_starts)
* @param [OUT] output Buffer to store MAC (must be at least key_len long)
*/
WS_DLL_PUBLIC
void aes_cmac_encrypt_finish(
aes_cmac_ctx *ctx,
guint8 *output);
#endif
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