73 lines
2.5 KiB
C
73 lines
2.5 KiB
C
/*
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File: file_hfs.c
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Copyright (C) 2012 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_hfsp)
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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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#include "hfsp_struct.h"
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/*@ requires valid_register_header_check(file_stat); */
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static void register_header_check_hfsp(file_stat_t *file_stat);
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const file_hint_t file_hint_hfsp= {
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.extension="hfsp",
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.description="HFS+/HFSX",
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.max_filesize=2048,
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.recover=0,
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.enable_by_default=1,
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.register_header_check=®ister_header_check_hfsp
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};
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/*@
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@ requires buffer_size >= sizeof(struct hfsp_vh);
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@ requires separation: \separated(&file_hint_hfsp, buffer+(..), file_recovery, file_recovery_new);
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@ requires valid_header_check_param(buffer, buffer_size, safe_header_only, file_recovery, file_recovery_new);
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@ ensures valid_header_check_result(\result, file_recovery_new);
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@ assigns *file_recovery_new;
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@*/
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static int header_check_hfsp(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 hfsp_vh *vh=(const struct hfsp_vh *)buffer;
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if (!(be32(vh->blocksize)%512==0 && be32(vh->blocksize)!=0 && be32(vh->free_blocks)<=be32(vh->total_blocks)))
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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_hfsp.extension;
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return 1;
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}
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static void register_header_check_hfsp(file_stat_t *file_stat)
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{
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register_header_check(0, "H+\0\4", 4, &header_check_hfsp, file_stat);
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#ifndef __FRAMAC__
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register_header_check(0, "HX\0\5", 4, &header_check_hfsp, file_stat);
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#endif
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}
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#endif
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