107 lines
3.7 KiB
C
107 lines
3.7 KiB
C
/*
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File: file_mb.c
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Copyright (C) 2007 Christophe GRENIER <grenier@cgsecurity.org>
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This software 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; either version 2 of the License, or
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(at your option) any later version.
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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 along
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with this program; if not, write the Free Software Foundation, Inc., 51
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Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#if !defined(SINGLE_FORMAT) || defined(SINGLE_FORMAT_mb)
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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#include <stdio.h>
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#include "types.h"
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#include "filegen.h"
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#include "common.h"
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/*@ requires \valid(file_stat); */
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static void register_header_check_mb(file_stat_t *file_stat);
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const file_hint_t file_hint_mb= {
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.extension="mb",
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.description="Maya",
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.max_filesize=PHOTOREC_MAX_FILE_SIZE,
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.recover=1,
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.enable_by_default=1,
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.register_header_check=®ister_header_check_mb
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};
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struct maya_header
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{
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char magic[4];
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uint32_t size;
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char magic2[8];
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} __attribute__ ((gcc_struct, __packed__));
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/*@
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@ requires buffer_size >= sizeof(struct maya_header);
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@ requires \valid_read(buffer+(0..buffer_size-1));
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@ requires valid_file_recovery(file_recovery);
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@ requires \valid(file_recovery_new);
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@ requires file_recovery_new->blocksize > 0;
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@ requires separation: \separated(&file_hint_mb, buffer+(..), file_recovery, file_recovery_new);
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@ assigns *file_recovery_new;
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@ ensures \result == 0 || \result == 1;
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@ ensures \result!=0 ==> valid_file_recovery(file_recovery_new);
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@*/
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static int header_check_mb(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)
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{
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const struct maya_header *hdr=(const struct maya_header *)buffer;
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const unsigned int size=be32(hdr->size);
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if(memcmp(buffer,"FOR4",4)!=0 || size < 8)
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return 0;
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reset_file_recovery(file_recovery_new);
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file_recovery_new->extension=file_hint_mb.extension;
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file_recovery_new->min_filesize=16;
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file_recovery_new->calculated_file_size=(uint64_t)size+8;
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file_recovery_new->data_check=&data_check_size;
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file_recovery_new->file_check=&file_check_size;
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return 1;
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}
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/*@
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@ requires buffer_size >= 4;
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@ requires \valid_read(buffer+(0..buffer_size-1));
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@ requires valid_file_recovery(file_recovery);
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@ requires \valid(file_recovery_new);
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@ requires file_recovery_new->blocksize > 0;
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@ requires separation: \separated(&file_hint_mb, buffer+(..), file_recovery, file_recovery_new);
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@ assigns *file_recovery_new;
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@ ensures \result == 0 || \result == 1;
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@ ensures \result!=0 ==> valid_file_recovery(file_recovery_new);
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@*/
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static int header_check_mp(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)
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{
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if(memcmp(buffer,"FOR4",4)!=0)
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return 0;
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reset_file_recovery(file_recovery_new);
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file_recovery_new->extension="mp";
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file_recovery_new->min_filesize=16;
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return 1;
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}
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static void register_header_check_mb(file_stat_t *file_stat)
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{
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register_header_check(8, "MayaFOR4", 8, &header_check_mb, file_stat);
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register_header_check(8, "MAYAFOR4", 8, &header_check_mb, file_stat);
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register_header_check(8, "MPLEFOR4", 8, &header_check_mp, file_stat);
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}
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#endif
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