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PhotoRec: recover .woff Web Open Font Format

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This commit is contained in:
Christophe Grenier 2014-05-27 22:09:39 +02:00
parent bf789c2453
commit d31e12877b
3 changed files with 86 additions and 0 deletions
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1
src/Makefile.am
View file

@ -281,6 +281,7 @@ file_C = filegen.c \
file_wks.c \
file_wmf.c \
file_wnk.c \
file_woff.c \
file_wpb.c \
file_wpd.c \
file_wtv.c \

2
src/file_list.c
View file

@ -284,6 +284,7 @@ extern const file_hint_t file_hint_win;
extern const file_hint_t file_hint_wks;
extern const file_hint_t file_hint_wmf;
extern const file_hint_t file_hint_wnk;
extern const file_hint_t file_hint_woff;
extern const file_hint_t file_hint_wpb;
extern const file_hint_t file_hint_wpd;
extern const file_hint_t file_hint_wtv;
@ -557,6 +558,7 @@ file_enable_t list_file_enable[]=
{ .enable=0, .file_hint=&file_hint_wks },
{ .enable=0, .file_hint=&file_hint_wmf },
{ .enable=0, .file_hint=&file_hint_wnk },
{ .enable=0, .file_hint=&file_hint_woff },
{ .enable=0, .file_hint=&file_hint_wpb },
{ .enable=0, .file_hint=&file_hint_wpd },
{ .enable=0, .file_hint=&file_hint_wtv },

83
src/file_woff.c Normal file
View file

@ -0,0 +1,83 @@
/*
File: file_woff.c
Copyright (C) 2014 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.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include <stdio.h>
#include "types.h"
#include "filegen.h"
#include "common.h"
static void register_header_check_woff(file_stat_t *file_stat);
const file_hint_t file_hint_woff= {
.extension="woff",
.description="Web Open Font Format",
.min_header_distance=0,
.max_filesize=PHOTOREC_MAX_FILE_SIZE,
.recover=1,
.enable_by_default=1,
.register_header_check=&register_header_check_woff
};
struct WOFFHeader
{
uint32_t signature;
uint32_t flavor;
uint32_t length;
uint16_t numTables;
uint16_t reserved;
uint32_t totalSfntSize;
uint16_t majorVersion;
uint16_t minorVersion;
uint32_t metaOffset;
uint32_t metaLength;
uint32_t metaOrigLength;
uint32_t privOffset;
uint32_t privLength;
} __attribute__ ((__packed__));
static int header_check_woff(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 WOFFHeader *woff=(const struct WOFFHeader *)buffer;
if(woff->reserved==0 &&
be32(woff->metaOffset) + be32(woff->metaLength)< be32(woff->length) &&
be32(woff->privOffset) + be32(woff->privLength)< be32(woff->length))
{
reset_file_recovery(file_recovery_new);
file_recovery_new->extension=file_hint_woff.extension;
file_recovery_new->calculated_file_size=(uint64_t)be32(woff->length);
file_recovery_new->data_check=&data_check_size;
file_recovery_new->file_check=&file_check_size;
return 1;
}
return 0;
}
static void register_header_check_woff(file_stat_t *file_stat)
{
register_header_check(0, "wOFF", 4, &header_check_woff, file_stat);
}