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/*
File: file_pgdump.c
Copyright (C) 2018 Christophe GRENIER <grenier@cgsecurity.org>
This software 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; either version 2 of the License, or
(at your option) any later version.
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 the Free Software Foundation, Inc., 51
Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#if !defined(SINGLE_FORMAT) || defined(SINGLE_FORMAT_pgdump)
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include <stdio.h>
#include <time.h>
#include "types.h"
#include "filegen.h"
#include "common.h"
#include "log.h"
/* Information from https://doxygen.postgresql.org/pg__backup__archiver_8h_source.html */
#define MAKE_ARCHIVE_VERSION(major, minor, rev) (((major) * 256 + (minor)) * 256 + (rev))
/* Historical version numbers (checked in code) */
#define K_VERS_1_0 MAKE_ARCHIVE_VERSION(1, 0, 0)
#define K_VERS_1_2 MAKE_ARCHIVE_VERSION(1, 2, 0) /* Allow No ZLIB */
#define K_VERS_1_3 MAKE_ARCHIVE_VERSION(1, 3, 0) /* BLOBs */
#define K_VERS_1_4 MAKE_ARCHIVE_VERSION(1, 4, 0) /* Date & name in header */
#define K_VERS_1_5 MAKE_ARCHIVE_VERSION(1, 5, 0) /* Handle dependencies */
#define K_VERS_1_6 MAKE_ARCHIVE_VERSION(1, 6, 0) /* Schema field in TOCs */
#define K_VERS_1_7 MAKE_ARCHIVE_VERSION(1, 7, 0) /* File Offset size in
* header */
#define K_VERS_1_8 MAKE_ARCHIVE_VERSION(1, 8, 0) /* change interpretation
* of ID numbers and
* dependencies */
#define K_VERS_1_9 MAKE_ARCHIVE_VERSION(1, 9, 0) /* add default_with_oids
* tracking */
#define K_VERS_1_10 MAKE_ARCHIVE_VERSION(1, 10, 0) /* add tablespace */
#define K_VERS_1_11 MAKE_ARCHIVE_VERSION(1, 11, 0) /* add toc section
* indicator */
#define K_VERS_1_12 MAKE_ARCHIVE_VERSION(1, 12, 0) /* add separate BLOB
* entries */
#define K_VERS_1_13 MAKE_ARCHIVE_VERSION(1, 13, 0) /* change search_path
* behavior */
struct pgdmp_hdr
{
char magic[5];
uint8_t vmaj;
uint8_t vmin;
uint8_t vrev;
uint8_t intSize;
uint8_t offSize; /* 1.7+ */
uint8_t format;
/* 1.2 uint8_t 1.4+ uint32_t assuming intSize == 4*/
uint32_t compression;
/* 1.4 uint32_t assuming intSize == 4 */
uint32_t tm_sec;
uint32_t tm_min;
uint32_t tm_hour;
uint32_t tm_mday;
uint32_t tm_mon;
uint32_t tm_year;
uint32_t tm_isdst;
/* connection */
/* 1.10 */
/* remoteVersionStr */
/* PG_VERSION */
} __attribute__ ((gcc_struct, __packed__));
/*@ requires valid_register_header_check(file_stat); */
static void register_header_check_pgdump(file_stat_t *file_stat);
const file_hint_t file_hint_pgdump= {
.extension="dump",
.description="Postgresql Binary Dump",
.max_filesize=PHOTOREC_MAX_FILE_SIZE,
.recover=1,
.enable_by_default=1,
.register_header_check=®ister_header_check_pgdump
};
/*@
@ requires buffer_size >= sizeof(struct pgdmp_hdr);
@ requires separation: \separated(&file_hint_pgdump, buffer+(..), file_recovery, file_recovery_new);
@ requires valid_header_check_param(buffer, buffer_size, safe_header_only, file_recovery, file_recovery_new);
@ ensures valid_header_check_result(\result, file_recovery_new);
@ assigns *file_recovery_new;
@*/
static int header_check_pgdump(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, const file_recovery_t *file_recovery, file_recovery_t *file_recovery_new)
{
const struct pgdmp_hdr *hdr=(const struct pgdmp_hdr *)buffer;
if(hdr->intSize == 0 || hdr->intSize > 32)
return 0;
reset_file_recovery(file_recovery_new);
file_recovery_new->extension=file_hint_pgdump.extension;
return 1;
}
static void register_header_check_pgdump(file_stat_t *file_stat)
{
register_header_check(0, "PGDMP", 5, &header_check_pgdump, file_stat);
}
#endif
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