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