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/*
File: file_rpm.c
Copyright (C) 2007 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.
*/
#if !defined(SINGLE_FORMAT) || defined(SINGLE_FORMAT_rpm)
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include <stdio.h>
#include "types.h"
#include "common.h"
#include "filegen.h"
/*@ requires valid_register_header_check(file_stat); */
static void register_header_check_rpm(file_stat_t *file_stat);
const file_hint_t file_hint_rpm= {
.extension="rpm",
.description="RPM package",
.max_filesize=PHOTOREC_MAX_FILE_SIZE,
.recover=1,
.enable_by_default=1,
.register_header_check=®ister_header_check_rpm
};
struct rpmlead {
unsigned char magic[4];
unsigned char major, minor;
uint16_t type;
uint16_t archnum;
char name[66];
uint16_t osnum;
uint16_t signature_type;
char reserved[16];
} __attribute__ ((gcc_struct, __packed__));
/*@
@ requires file_recovery->file_rename==&file_rename_rpm;
@ requires valid_file_rename_param(file_recovery);
@ ensures valid_file_rename_result(file_recovery);
@*/
static void file_rename_rpm(file_recovery_t *file_recovery)
{
FILE *file;
struct rpmlead hdr;
if((file=fopen(file_recovery->filename, "rb"))==NULL)
return;
if(fread(&hdr, sizeof(hdr), 1, file)!=1)
{
fclose(file);
return ;
}
fclose(file);
file_rename(file_recovery, &hdr.name, 66, 0, "rpm", 0);
}
/*@
@ requires buffer_size >= sizeof(struct rpmlead);
@ requires separation: \separated(&file_hint_rpm, buffer+(..), file_recovery, file_recovery_new);
@ requires valid_header_check_param(buffer, buffer_size, safe_header_only, file_recovery, file_recovery_new);
@ ensures valid_header_check_result(\result, file_recovery_new);
@ assigns *file_recovery_new;
@*/
static int header_check_rpm(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 rpmlead *hdr=(const struct rpmlead *)buffer;
if(be16(hdr->type)>1) /* 0=bin 1=src */
return 0;
switch(be16(hdr->signature_type))
{
case 0: /* RPMSIG_NONE */
case 1: /* RPMSIG_PGP262_1024 */
case 5: /* RPMSIG_HEADERSIG */
break;
default:
return 0;
}
if(hdr->name[0]=='\0')
return 0;
reset_file_recovery(file_recovery_new);
file_recovery_new->min_filesize=(96 + 16 + 16); /* file header + checksum + content header */
file_recovery_new->extension=file_hint_rpm.extension;
file_recovery_new->file_rename=&file_rename_rpm;
return 1;
}
static void register_header_check_rpm(file_stat_t *file_stat)
{
/* RPM v3 */
static const unsigned char rpm_header[5]= {0xed, 0xab, 0xee, 0xdb, 0x3};
register_header_check(0, rpm_header,sizeof(rpm_header), &header_check_rpm, file_stat);
}
#endif
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