blob: 37d1925f58f6ca210bf6ba4f09990ef6555072de [file] [log] [blame]
* Copyright (C) 2012 Jeremy Kerr <>
* This program 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 3
* 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
* 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 to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the OpenSSL
* library under certain conditions as described in each individual source file,
* and distribute linked combinations including the two.
* You must obey the GNU General Public License in all respects for all
* of the code used other than OpenSSL. If you modify file(s) with this
* exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do
* so, delete this exception statement from your version. If you delete
* this exception statement from all source files in the program, then
* also delete it here.
#ifndef IMAGE_H
#define IMAGE_H
#include <stdint.h>
#include <bfd.h>
#include "coff/external.h"
#include "coff/pe.h"
struct region {
void *data;
int size;
char *name;
struct image {
uint8_t *buf;
size_t size;
/* size of the image, without signature */
size_t data_size;
/* Pointers to interesting parts of the image */
uint32_t *checksum;
struct external_PEI_DOS_hdr *doshdr;
struct external_PEI_IMAGE_hdr *pehdr;
union {
PEAOUTHDR *opt_32;
void *addr;
} opthdr;
/* size of a minimal opthdr for this machine, without data
* directories */
unsigned int opthdr_min_size;
/* size of the opthdr as specified by the image */
unsigned int opthdr_size;
struct data_dir_entry *data_dir;
struct data_dir_entry *data_dir_sigtable;
struct external_scnhdr *scnhdr;
int sections;
void *cert_table;
int cert_table_size;
/* We cache a few values from the aout header, so we don't have to
* keep checking whether to use the 32- or 64-bit version */
uint32_t file_alignment;
uint32_t header_size;
/* Regions that are included in the image hash: populated
* during image parsing, then used during the hash process.
struct region *checksum_regions;
int n_checksum_regions;
/* Generated signature */
void *sigbuf;
size_t sigsize;
struct data_dir_entry {
uint32_t addr;
uint32_t size;
} __attribute__((packed));
struct cert_table_header {
uint32_t size;
uint16_t revision;
uint16_t type;
} __attribute__((packed));
struct image *image_load(const char *filename);
int image_hash_sha256(struct image *image, uint8_t digest[]);
int image_add_signature(struct image *, void *sig, int size);
int image_get_signature(struct image *image, int signum,
uint8_t **buf, size_t *size);
int image_remove_signature(struct image *image, int signum);
int image_write(struct image *image, const char *filename);
int image_write_detached(struct image *image, int signum, const char *filename);
#endif /* IMAGE_H */