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/*
* Copyright (c) 2001, Dr Brian Gladman <brg@gladman.uk.net>, Worcester, UK.
* All rights reserved.
*
* LICENSE TERMS
*
* The free distribution and use of this software in both source and binary
* form is allowed (with or without changes) provided that:
*
* 1. distributions of this source code include the above copyright
* notice, this list of conditions and the following disclaimer;
*
* 2. distributions in binary form include the above copyright
* notice, this list of conditions and the following disclaimer
* in the documentation and/or other associated materials;
*
* 3. the copyright holder's name is not used to endorse products
* built using this software without specific written permission.
*
* DISCLAIMER
*
* This software is provided 'as is' with no explcit or implied warranties
* in respect of any properties, including, but not limited to, correctness
* and fitness for purpose.
*/
/*
* Issue Date: 21/01/2002
*
* This file contains the definitions required to use AES (Rijndael) in C.
*/
#ifndef _AES_H
#define _AES_H
#include <stdint.h>
/* BLOCK_SIZE is in BYTES: 16, 24, 32 or undefined for aes.c and 16, 20,
24, 28, 32 or undefined for aespp.c. When left undefined a slower
version that provides variable block length is compiled.
*/
#define BLOCK_SIZE 16
/* key schedule length (in 32-bit words) */
#if !defined(BLOCK_SIZE)
#define KS_LENGTH 128
#else
#define KS_LENGTH 4 * BLOCK_SIZE
#endif
#if defined(__cplusplus)
extern "C"
{
#endif
typedef uint16_t aes_fret; /* type for function return value */
#define aes_bad 0 /* bad function return value */
#define aes_good 1 /* good function return value */
#ifndef AES_DLL /* implement normal or DLL functions */
#define aes_rval aes_fret
#else
#define aes_rval aes_fret __declspec(dllexport) _stdcall
#endif
typedef struct /* the AES context for encryption */
{ uint32_t k_sch[KS_LENGTH]; /* the encryption key schedule */
uint32_t n_rnd; /* the number of cipher rounds */
uint32_t n_blk; /* the number of bytes in the state */
} aes_ctx;
/* for Kerberos 5 tree -- hide names! */
#define aes_blk_len krb5int_aes_blk_len
#define aes_enc_key krb5int_aes_enc_key
#define aes_enc_blk krb5int_aes_enc_blk
#define aes_dec_key krb5int_aes_dec_key
#define aes_dec_blk krb5int_aes_dec_blk
#define fl_tab krb5int_fl_tab
#define ft_tab krb5int_ft_tab
#define il_tab krb5int_il_tab
#define im_tab krb5int_im_tab
#define it_tab krb5int_it_tab
#define rcon_tab krb5int_rcon_tab
aes_rval aes_blk_len(unsigned int blen, aes_ctx cx[1]);
aes_rval aes_enc_key(const unsigned char in_key[], unsigned int klen, aes_ctx cx[1]);
aes_rval aes_enc_blk(const unsigned char in_blk[], unsigned char out_blk[], const aes_ctx cx[1]);
aes_rval aes_dec_key(const unsigned char in_key[], unsigned int klen, aes_ctx cx[1]);
aes_rval aes_dec_blk(const unsigned char in_blk[], unsigned char out_blk[], const aes_ctx cx[1]);
#if defined(__cplusplus)
}
#endif
#endif
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