/*
 * Copyright (c) 2007-2016, Cameron Rich
 * 
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions are met:
 *
 * * Redistributions of source code must retain the above copyright notice, 
 *   this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright notice, 
 *   this list of conditions and the following disclaimer in the documentation 
 *   and/or other materials provided with the distribution.
 * * Neither the name of the axTLS project nor the names of its contributors 
 *   may be used to endorse or promote products derived from this software 
 *   without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "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 COPYRIGHT OWNER 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.
 */

/**
 * @file crypto.h
 */

#ifndef HEADER_CRYPTO_H
#define HEADER_CRYPTO_H

#ifdef __cplusplus
extern "C" {
#endif

#include <stdint.h>

#ifndef STDCALL
#define STDCALL
#endif
#ifndef EXP_FUNC
#define EXP_FUNC
#endif


/* enable features based on a 'super-set' capbaility. */
#if defined(CONFIG_SSL_FULL_MODE) 
#define CONFIG_SSL_ENABLE_CLIENT
#define CONFIG_SSL_CERT_VERIFICATION
#elif defined(CONFIG_SSL_ENABLE_CLIENT)
#define CONFIG_SSL_CERT_VERIFICATION
#endif

/**************************************************************************
 * AES declarations 
 **************************************************************************/

#define AES_MAXROUNDS			14
#define AES_BLOCKSIZE           16
#define AES_IV_SIZE             16

typedef struct aes_key_st 
{
    uint16_t rounds;
    uint16_t key_size;
    uint32_t ks[(AES_MAXROUNDS+1)*8];
    uint8_t iv[AES_IV_SIZE];
} AES_CTX;

typedef enum
{
    AES_MODE_128,
    AES_MODE_256
} AES_MODE;

void AES_set_key(AES_CTX *ctx, const uint8_t *key, 
        const uint8_t *iv, AES_MODE mode);
void AES_cbc_encrypt(AES_CTX *ctx, const uint8_t *msg, 
        uint8_t *out, int length);
void AES_cbc_decrypt(AES_CTX *ks, const uint8_t *in, uint8_t *out, int length);
void AES_convert_key(AES_CTX *ctx);

#ifdef __cplusplus
}
#endif

#endif