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79 lines
2.7 KiB
C
79 lines
2.7 KiB
C
/******************************************************
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Copyright (c) 2011 Percona LLC and/or its affiliates.
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Encryption interface for XtraBackup.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*******************************************************/
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#ifndef XBCRYPT_H
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#define XBCRYPT_H
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#include <my_base.h>
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#include "common.h"
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#define XB_CRYPT_CHUNK_MAGIC1 "XBCRYP01"
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#define XB_CRYPT_CHUNK_MAGIC2 "XBCRYP02"
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#define XB_CRYPT_CHUNK_MAGIC3 "XBCRYP03" /* must be same size as ^^ */
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#define XB_CRYPT_CHUNK_MAGIC_CURRENT XB_CRYPT_CHUNK_MAGIC3
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#define XB_CRYPT_CHUNK_MAGIC_SIZE (sizeof(XB_CRYPT_CHUNK_MAGIC1)-1)
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#define XB_CRYPT_HASH GCRY_MD_SHA256
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#define XB_CRYPT_HASH_LEN 32
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/******************************************************************************
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Write interface */
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typedef struct xb_wcrypt_struct xb_wcrypt_t;
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/* Callback on write for i/o, must return # of bytes written or -1 on error */
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typedef ssize_t xb_crypt_write_callback(void *userdata,
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const void *buf, size_t len);
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xb_wcrypt_t *xb_crypt_write_open(void *userdata,
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xb_crypt_write_callback *onwrite);
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/* Takes buffer, original length, encrypted length iv and iv length, formats
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output buffer and calls write callback.
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Returns 0 on success, 1 on error */
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int xb_crypt_write_chunk(xb_wcrypt_t *crypt, const void *buf, size_t olen,
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size_t elen, const void *iv, size_t ivlen);
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/* Returns 0 on success, 1 on error */
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int xb_crypt_write_close(xb_wcrypt_t *crypt);
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/******************************************************************************
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Read interface */
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typedef struct xb_rcrypt_struct xb_rcrypt_t;
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/* Callback on read for i/o, must return # of bytes read or -1 on error */
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typedef size_t xb_crypt_read_callback(void *userdata, void *buf, size_t len);
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xb_rcrypt_t *xb_crypt_read_open(void *userdata,
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xb_crypt_read_callback *onread);
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typedef enum {
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XB_CRYPT_READ_CHUNK,
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XB_CRYPT_READ_INCOMPLETE,
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XB_CRYPT_READ_EOF,
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XB_CRYPT_READ_ERROR
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} xb_rcrypt_result_t;
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xb_rcrypt_result_t xb_crypt_read_chunk(xb_rcrypt_t *crypt, void **buf,
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size_t *olen, size_t *elen, void **iv,
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size_t *ivlen, my_bool *hash_appended);
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int xb_crypt_read_close(xb_rcrypt_t *crypt);
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#endif
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