/*

 * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.

 *

 * Licensed under the Apache License 2.0 (the "License").  You may not use

 * this file except in compliance with the License.  You can obtain a copy

 * in the file LICENSE in the source distribution or at

 * https://www.openssl.org/source/license.html

 */

#ifndef OSSL_ENGINES_E_AFALG_H

# define OSSL_ENGINES_E_AFALG_H

# if defined(__GNUC__) && __GNUC__ >= 4 && \

     (!defined(__STDC_VERSION__) || __STDC_VERSION__ < 199901L)

#  pragma GCC diagnostic ignored "-Wvariadic-macros"

# endif

# ifdef ALG_DEBUG

#  define ALG_DGB(x, ...) fprintf(stderr, "ALG_DBG: " x, __VA_ARGS__)

#  define ALG_INFO(x, ...) fprintf(stderr, "ALG_INFO: " x, __VA_ARGS__)

#  define ALG_WARN(x, ...) fprintf(stderr, "ALG_WARN: " x, __VA_ARGS__)

# else

#  define ALG_DGB(x, ...)

#  define ALG_INFO(x, ...)

#  define ALG_WARN(x, ...)

# endif

# define ALG_ERR(x, ...) fprintf(stderr, "ALG_ERR: " x, __VA_ARGS__)

# define ALG_PERR(x, ...) \

                do { \

                    fprintf(stderr, "ALG_PERR: " x, __VA_ARGS__); \

                    perror(NULL); \

                } while(0)

# define ALG_PWARN(x, ...) \

                do { \

                    fprintf(stderr, "ALG_PERR: " x, __VA_ARGS__); \

                    perror(NULL); \

                } while(0)

# ifndef AES_BLOCK_SIZE

#  define AES_BLOCK_SIZE   16

# endif

# define AES_KEY_SIZE_128 16

# define AES_KEY_SIZE_192 24

# define AES_KEY_SIZE_256 32

# define AES_IV_LEN       16

# define MAX_INFLIGHTS 1

typedef enum {

    MODE_UNINIT = 0,

    MODE_SYNC,

    MODE_ASYNC

} op_mode;

enum {

    AES_CBC_128 = 0,

    AES_CBC_192,

    AES_CBC_256

};

struct cbc_cipher_handles {

    int key_size;

    EVP_CIPHER *_hidden;

};

typedef struct cbc_cipher_handles cbc_handles;

struct afalg_aio_st {

    int efd;

    op_mode mode;

    aio_context_t aio_ctx;

    struct io_event events[MAX_INFLIGHTS];

    struct iocb cbt[MAX_INFLIGHTS];

};

typedef struct afalg_aio_st afalg_aio;

/*

 * MAGIC Number to identify correct initialisation

 * of afalg_ctx.

 */

# define MAGIC_INIT_NUM 0x1890671

struct afalg_ctx_st {

    int init_done;

    int sfd;

    int bfd;

# ifdef ALG_ZERO_COPY

    int zc_pipe[2];

# endif

    afalg_aio aio;

};

typedef struct afalg_ctx_st afalg_ctx;

#endif