96 lines
3.4 KiB
C
96 lines
3.4 KiB
C
/*
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File: file_als.c
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Copyright (C) 2008 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_als)
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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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/*@ requires valid_register_header_check(file_stat); */
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static void register_header_check_als(file_stat_t *file_stat);
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const file_hint_t file_hint_als= {
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.extension="als",
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.description="Ableton Live Sets",
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.max_filesize=100*1024*1024,
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.recover=1,
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.enable_by_default=1,
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.register_header_check=®ister_header_check_als
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};
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/*@
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@ requires file_recovery->file_check == &file_check_als;
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@ requires \separated(file_recovery, file_recovery->handle, file_recovery->extension, &errno, &Frama_C_entropy_source);
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@ requires valid_file_check_param(file_recovery);
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@ ensures valid_file_check_result(file_recovery);
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@ assigns *file_recovery->handle, errno, file_recovery->file_size;
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@ assigns Frama_C_entropy_source;
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@*/
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static void file_check_als(file_recovery_t *file_recovery)
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{
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static const unsigned char als_footer[0x16]= {
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x80, 0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00,
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0x80, 0x00, 0x00, 0x00, 0x80, 0x01
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};
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file_search_footer(file_recovery, als_footer, sizeof(als_footer), 7);
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}
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/*@
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@ requires buffer_size >= 11+13;
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@ requires separation: \separated(&file_hint_als, 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_als(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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static const unsigned char als_header2[13]= {
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0x0c, 'L', 'i', 'v', 'e', 'D', 'o', 'c',
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'u', 'm', 'e', 'n', 't'
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};
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if(memcmp(buffer+11,als_header2,sizeof(als_header2))!=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=file_hint_als.extension;
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file_recovery_new->file_check=&file_check_als;
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return 1;
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}
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/* Header
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* 0000 ab 1e 56 78 03 XX 00 00 00 00 XX 0c 4c 69 76 65 | Vx Live|
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* 0010 44 6f 63 75 6d 65 6e 74 XX 00 00 00 00 XX XX XX |Document |
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*/
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static void register_header_check_als(file_stat_t *file_stat)
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{
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static const unsigned char als_header[5]= {
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0xab, 0x1e, 'V', 'x', 0x03
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};
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register_header_check(0, als_header,sizeof(als_header), &header_check_als, file_stat);
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}
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#endif
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