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/*
This file is part of libextractor.
Copyright Copyright (C) 2008 Heikki Lindholm
libextractor 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, or (at your
option) any later version.
libextractor 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 libextractor; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
/*
* handles AppleSingle and AppleDouble header files
* see RFC 1740
*/
#include "platform.h"
#include "extractor.h"
#include "pack.h"
#define DEBUG 0
#define APPLESINGLE_SIGNATURE "\x00\x05\x16\x00"
#define APPLEDOUBLE_SIGNATURE "\x00\x05\x16\x07"
typedef struct
{
unsigned char magic[4];
unsigned int version;
char homeFileSystem[16]; /* v1: in ASCII v2: zero filler */
unsigned short entries;
} ApplefileHeader;
#define APPLEFILE_HEADER_SIZE 26
#define APPLEFILE_HEADER_SPEC "4bW16bH"
#define APPLEFILE_HEADER_FIELDS(p) \
&(p)->magic, \
&(p)->version, \
&(p)->homeFileSystem, \
&(p)->entries
typedef struct
{
unsigned int id;
unsigned int offset;
unsigned int length;
} ApplefileEntryDescriptor;
#define APPLEFILE_ENTRY_DESCRIPTOR_SIZE 12
#define APPLEFILE_ENTRY_DESCRIPTOR_SPEC "WWW"
#define APPLEFILE_ENTRY_DESCRIPTOR_FIELDS(p) \
&(p)->id, \
&(p)->offset, \
&(p)->length
#define AED_ID_DATA_FORK 1
#define AED_ID_RESOURCE_FORK 2
#define AED_ID_REAL_NAME 3
#define AED_ID_COMMENT 4
#define AED_ID_ICON_BW 5
#define AED_ID_ICON_COLOUR 6
#define AED_ID_FILE_DATES_INFO 8
#define AED_ID_FINDER_INFO 9
#define AED_ID_MACINTOSH_FILE_INFO 10
#define AED_ID_PRODOS_FILE_INFO 11
#define AED_ID_MSDOS_FILE_INFO 12
#define AED_ID_SHORT_NAME 13
#define AED_ID_AFP_FILE_INFO 14
#define AED_ID_DIRECTORY_ID 15
static int readApplefileHeader(const unsigned char *data,
size_t *offset,
size_t size,
ApplefileHeader *hdr)
{
if ((*offset + APPLEFILE_HEADER_SIZE) > size)
return -1;
EXTRACTOR_common_cat_unpack(data + *offset,
APPLEFILE_HEADER_SPEC,
APPLEFILE_HEADER_FIELDS(hdr));
*offset += APPLEFILE_HEADER_SIZE;
return 0;
}
static int readEntryDescriptor(const unsigned char *data,
size_t *offset,
size_t size,
ApplefileEntryDescriptor *dsc)
{
if ((*offset + APPLEFILE_ENTRY_DESCRIPTOR_SIZE) > size)
return -1;
EXTRACTOR_common_cat_unpack(data + *offset,
APPLEFILE_ENTRY_DESCRIPTOR_SPEC,
APPLEFILE_ENTRY_DESCRIPTOR_FIELDS(dsc));
*offset += APPLEFILE_ENTRY_DESCRIPTOR_SIZE;
return 0;
}
/* mimetype = application/applefile */
int
EXTRACTOR_applefile_extract (const char *sdata,
size_t size,
EXTRACTOR_MetaDataProcessor proc,
void *proc_cls,
const char *options)
{
const unsigned char *data = (const unsigned char*) sdata;
size_t offset;
ApplefileHeader header;
ApplefileEntryDescriptor dsc;
int i;
offset = 0;
if (readApplefileHeader(data, &offset, size, &header) == -1)
return 0;
if ( (memcmp(header.magic, APPLESINGLE_SIGNATURE, 4) != 0) &&
(memcmp(header.magic, APPLEDOUBLE_SIGNATURE, 4) != 0) )
return 0;
if (0 != proc (proc_cls,
"applefile",
EXTRACTOR_METATYPE_MIMETYPE,
EXTRACTOR_METAFORMAT_UTF8,
"text/plain",
"application/applefile",
strlen ("application/applefile")+1))
return 1;
#if DEBUG
fprintf(stderr,
"applefile header: %08x %d\n", header.version, header.entries);
#endif
if ( (header.version != 0x00010000) &&
(header.version != 0x00020000) )
return 0;
for (i = 0; i < header.entries; i++) {
if (readEntryDescriptor(data, &offset, size, &dsc) == -1)
break;
#if DEBUG
fprintf(stderr,
"applefile entry: %u %u %u\n", dsc.id, dsc.offset, dsc.length);
#endif
switch (dsc.id)
{
case AED_ID_DATA_FORK:
{
/* same as in filenameextractor.c */
char s[14];
if (dsc.length >= 1000000000)
snprintf (s, 13, "%.2f %s", dsc.length / 1000000000.0,
_("GB"));
else if (dsc.length >= 1000000)
snprintf (s, 13, "%.2f %s", dsc.length / 1000000.0, _("MB"));
else if (dsc.length >= 1000)
snprintf (s, 13, "%.2f %s", dsc.length / 1000.0, _("KB"));
else
snprintf (s, 13, "%.2f %s", (double) dsc.length, _("Bytes"));
if (0 != proc (proc_cls,
"applefile",
EXTRACTOR_METATYPE_EMBEDDED_FILE_SIZE,
EXTRACTOR_METAFORMAT_UTF8,
"text/plain",
s,
strlen (s) + 1))
return 1;
}
break;
case AED_ID_REAL_NAME:
{
char s[2048];
if ( (dsc.length < sizeof(s)) &&
((dsc.offset + dsc.length) < size) ) {
memcpy(s, data + dsc.offset, dsc.length);
s[dsc.length] = '\0';
if (0 != proc (proc_cls,
"applefile",
EXTRACTOR_METATYPE_FILENAME,
EXTRACTOR_METAFORMAT_UTF8,
"text/plain",
s,
dsc.length + 1))
return 1;
}
}
break;
case AED_ID_COMMENT:
if ( (dsc.length < 65536) && ((dsc.offset + dsc.length) < size) ) {
char *s = malloc(dsc.length + 1);
if (s != NULL) {
memcpy(s, data + dsc.offset, dsc.length);
s[dsc.length] = '\0';
if (0 != proc (proc_cls,
"applefile",
EXTRACTOR_METATYPE_COMMENT,
EXTRACTOR_METAFORMAT_UTF8,
"text/plain",
s,
dsc.length + 1))
{
free (s);
return 1;
}
free (s);
}
}
break;
case AED_ID_FINDER_INFO:
if (dsc.length >= 16 && (dsc.offset + dsc.length) < size) {
char s[5];
memcpy(s, data + dsc.offset, 4);
s[4] = '\0';
if (0 != proc (proc_cls,
"applefile",
EXTRACTOR_METATYPE_FINDER_FILE_TYPE,
EXTRACTOR_METAFORMAT_C_STRING,
"text/plain",
s,
strlen(s) + 1))
return 1;
memcpy(s, data + dsc.offset + 4, 4);
s[4] = '\0';
if (0 != proc (proc_cls,
"applefile",
EXTRACTOR_METATYPE_FINDER_FILE_CREATOR,
EXTRACTOR_METAFORMAT_C_STRING,
"text/plain",
s,
strlen(s) + 1))
return 1;
}
break;
default:
break;
}
}
return 0;
}
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