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/******************************************************
Copyright (c) 2011 Percona Ireland Ltd.
Encryption interface for XtraBackup.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*******************************************************/
#ifndef XBCRYPT_H
#define XBCRYPT_H
#include <my_base.h>
#include "common.h"
#define XB_CRYPT_CHUNK_MAGIC "XBCRYP01"
#define XB_CRYPT_CHUNK_MAGIC_SIZE (sizeof(XB_CRYPT_CHUNK_MAGIC)-1)
/******************************************************************************
Write interface */
typedef struct xb_wcrypt_struct xb_wcrypt_t;
/* Callback on write for i/o, must return # of bytes written or -1 on error */
typedef ssize_t xb_crypt_write_callback(void *userdata,
const void *buf, size_t len);
xb_wcrypt_t *xb_crypt_write_open(void *userdata,
xb_crypt_write_callback *onwrite);
/* Takes buffer, original length and encrypted length, formats output buffer
and calls write callback.
Returns 0 on success, 1 on error */
int xb_crypt_write_chunk(xb_wcrypt_t *crypt, const void *buf, size_t olen,
size_t elen);
/* Returns 0 on success, 1 on error */
int xb_crypt_write_close(xb_wcrypt_t *crypt);
/******************************************************************************
Read interface */
typedef struct xb_rcrypt_struct xb_rcrypt_t;
/* Callback on write for i/o, must return # of bytes read or -1 on error */
typedef ssize_t xb_crypt_read_callback(void *userdata,
void *buf, size_t len);
xb_rcrypt_t *xb_crypt_read_open(void *userdata,
xb_crypt_read_callback *onread);
typedef enum {
XB_CRYPT_READ_CHUNK,
XB_CRYPT_READ_EOF,
XB_CRYPT_READ_ERROR
} xb_rcrypt_result_t;
xb_rcrypt_result_t xb_crypt_read_chunk(xb_rcrypt_t *crypt, void **buf,
size_t *olen, size_t *elen);
int xb_crypt_read_close(xb_rcrypt_t *crypt);
/******************************************************************************
Utility interface */
my_bool xb_crypt_read_key_file(const char *filename,
void** key, uint *keylength);
#endif
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