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MDEV-9566 Add Percona Xtrabackup 2.3.7

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Vladislav Vaintroub 2017-04-18 18:43:20 +00:00 • committed by Sergei Golubchik
commit d7714308e0
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104
extra/mariabackup/xbcrypt_write.c Normal file
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/******************************************************
Copyright (c) 2013 Percona LLC and/or its affiliates.
The xbcrypt format writer implementation.
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*******************************************************/
#include "xbcrypt.h"
struct xb_wcrypt_struct {
void *userdata;
xb_crypt_write_callback *write;
};
xb_wcrypt_t *
xb_crypt_write_open(void *userdata, xb_crypt_write_callback *onwrite)
{
xb_wcrypt_t *crypt;
xb_ad(onwrite);
crypt = (xb_wcrypt_t *) my_malloc(sizeof(xb_wcrypt_t), MYF(MY_FAE));
crypt->userdata = userdata;
crypt->write = onwrite;
return crypt;
}
int xb_crypt_write_chunk(xb_wcrypt_t *crypt, const void *buf, size_t olen,
size_t elen, const void *iv, size_t ivlen)
{
uchar tmpbuf[XB_CRYPT_CHUNK_MAGIC_SIZE + 8 + 8 + 8 + 4 + 8];
uchar *ptr;
ulong checksum;
xb_ad(olen <= INT_MAX);
if (olen > INT_MAX)
return 0;
xb_ad(elen <= INT_MAX);
if (elen > INT_MAX)
return 0;
xb_ad(ivlen <= INT_MAX);
if (ivlen > INT_MAX)
return 0;
ptr = tmpbuf;
memcpy(ptr, XB_CRYPT_CHUNK_MAGIC_CURRENT, XB_CRYPT_CHUNK_MAGIC_SIZE);
ptr += XB_CRYPT_CHUNK_MAGIC_SIZE;
int8store(ptr, (ulonglong)0); /* reserved */
ptr += 8;
int8store(ptr, (ulonglong)olen); /* original size */
ptr += 8;
int8store(ptr, (ulonglong)elen); /* encrypted (actual) size */
ptr += 8;
checksum = crc32(0, buf, elen);
int4store(ptr, checksum); /* checksum */
ptr += 4;
int8store(ptr, (ulonglong)ivlen); /* iv size */
ptr += 8;
xb_ad(ptr <= tmpbuf + sizeof(tmpbuf));
if (crypt->write(crypt->userdata, tmpbuf, ptr-tmpbuf) == -1)
return 1;
if (crypt->write(crypt->userdata, iv, ivlen) == -1)
return 1;
if (crypt->write(crypt->userdata, buf, elen) == -1)
return 1;
return 0;
}
int xb_crypt_write_close(xb_wcrypt_t *crypt)
{
my_free(crypt);
return 0;
}