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fwtool: update to latest Git head

Browse Source 
Includes following changes:

 9d9d4c284786 fix possible garbage in unitialized char* struct members
 dbc1b1b71b24 fix possible copy of null buffer and validation of unitialized header
 76d53deef8bb crc32: add missing stdint.h dependency
 e5666ed3b47c add cram based unit tests
 abe0cf7de053 add initial GitLab CI support
 e43042507b4f iron out extra compiler warnings
 5df0cd6e1523 convert into CMake project
 a7dc0526f819 refactor into separate Git project

adds missing PKG_LICENSE field and converts the package build to utilize
CMake.

Signed-off-by: Petr Štetiar <ynezz@true.cz>
This commit is contained in:
Petr Štetiar 2019-11-09 14:33:13 +01:00
parent e97113d5e1
commit 4ba8f7b1ef
5 changed files with 11 additions and 681 deletions
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21
package/system/fwtool/Makefile
View File

@ -8,15 +8,24 @@
include $(TOPDIR)/rules.mk
PKG_NAME:=fwtool
PKG_RELEASE:=2
PKG_RELEASE:=1
PKG_SOURCE_PROTO:=git
PKG_SOURCE_URL=$(PROJECT_GIT)/project/fwtool.git
PKG_SOURCE_DATE:=2019-11-09
PKG_SOURCE_VERSION:=9d9d4c2847862adec2f474d4126213c17f98e024
PKG_MIRROR_HASH:=4a72a48cbc7cda4c1860ec8328c049b4b84f7f00273d82ee98175937b63af1f8
CMAKE_INSTALL:=1
PKG_FLAGS:=nonshared
PKG_LICENSE:=GPL-2.0
PKG_MAINTAINER := Felix Fietkau <nbd@nbd.name>
PKG_BUILD_DEPENDS := fwtool/host
include $(INCLUDE_DIR)/package.mk
include $(INCLUDE_DIR)/host-build.mk
include $(INCLUDE_DIR)/cmake.mk
HOST_BUILD_PREFIX:=$(STAGING_DIR_HOST)
@ -26,21 +35,13 @@ define Package/fwtool
TITLE:=Utility for appending and extracting firmware metadata and signatures
endef
define Host/Compile
$(HOSTCC) $(HOST_CFLAGS) $(HOST_LDFLAGS) -o $(HOST_BUILD_DIR)/fwtool ./src/fwtool.c
endef
define Host/Install
$(INSTALL_BIN) $(HOST_BUILD_DIR)/fwtool $(1)/bin/
endef
define Build/Compile
$(TARGET_CC) $(TARGET_CFLAGS) $(TARGET_LDFLAGS) -o $(PKG_BUILD_DIR)/fwtool ./src/fwtool.c
endef
define Package/fwtool/install
$(INSTALL_DIR) $(1)/usr/bin
$(INSTALL_BIN) $(PKG_BUILD_DIR)/fwtool $(1)/usr/bin/
$(INSTALL_BIN) $(PKG_INSTALL_DIR)/usr/bin/fwtool $(1)/usr/bin/
endef
$(eval $(call HostBuild))

48
package/system/fwtool/src/crc32.h
View File

@ -1,48 +0,0 @@
/*
* Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
*
* Based on busybox code:
* CRC32 table fill function
* Copyright (C) 2006 by Rob Sullivan <cogito.ergo.cogito@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation
*
* 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.
*/
#ifndef __BB_CRC32_H
#define __BB_CRC32_H
static inline void
crc32_filltable(uint32_t *crc_table)
{
uint32_t polynomial = 0xedb88320;
uint32_t c;
int i, j;
for (i = 0; i < 256; i++) {
c = i;
for (j = 8; j; j--)
c = (c&1) ? ((c >> 1) ^ polynomial) : (c >> 1);
*crc_table++ = c;
}
}
static inline uint32_t
crc32_block(uint32_t val, const void *buf, unsigned len, uint32_t *crc_table)
{
const void *end = (uint8_t*)buf + len;
while (buf != end) {
val = crc_table[(uint8_t)val ^ *(uint8_t*)buf] ^ (val >> 8);
buf = (uint8_t*)buf + 1;
}
return val;
}
#endif

39
package/system/fwtool/src/fwimage.h
View File

@ -1,39 +0,0 @@
/*
* Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation
*
* 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.
*/
#ifndef __FWIMAGE_H
#define __FWIMAGE_H
#include <stdint.h>
#define FWIMAGE_MAGIC 0x46577830 /* FWx0 */
struct fwimage_header {
uint32_t version;
uint32_t flags;
char data[];
};
struct fwimage_trailer {
uint32_t magic;
uint32_t crc32;
uint8_t type;
uint8_t __pad[3];
uint32_t size;
};
enum fwimage_type {
FWIMAGE_SIGNATURE,
FWIMAGE_INFO,
};
#endif

468
package/system/fwtool/src/fwtool.c
View File

@ -1,468 +0,0 @@
/*
* Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation
*
* 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.
*/
#include <sys/types.h>
#include <stdio.h>
#include <getopt.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "fwimage.h"
#include "utils.h"
#include "crc32.h"
#define METADATA_MAXLEN 30 * 1024
#define SIGNATURE_MAXLEN 1 * 1024
#define BUFLEN (METADATA_MAXLEN + SIGNATURE_MAXLEN + 1024)
enum {
MODE_DEFAULT = -1,
MODE_EXTRACT = 0,
MODE_APPEND = 1,
};
struct data_buf {
char *cur;
char *prev;
int cur_len;
int file_len;
};
static FILE *signature_file, *metadata_file, *firmware_file;
static int file_mode = MODE_DEFAULT;
static bool truncate_file;
static bool write_truncated;
static bool quiet = false;
static uint32_t crc_table[256];
#define msg(...) \
do { \
if (!quiet) \
fprintf(stderr, __VA_ARGS__); \
} while (0)
static int
usage(const char *progname)
{
fprintf(stderr, "Usage: %s <options> <firmware>\n"
"\n"
"Options:\n"
" -S <file>: Append signature file to firmware image\n"
" -I <file>: Append metadata file to firmware image\n"
" -s <file>: Extract signature file from firmware image\n"
" -i <file>: Extract metadata file from firmware image\n"
" -t: Remove extracted chunks from firmare image (using -s, -i)\n"
" -T: Output firmware image without extracted chunks to stdout (using -s, -i)\n"
" -q: Quiet (suppress error messages)\n"
"\n", progname);
return 1;
}
static FILE *
open_file(const char *name, bool write)
{
FILE *ret;
if (!strcmp(name, "-"))
return write ? stdout : stdin;
ret = fopen(name, write ? "w" : "r+");
if (!ret && !write)
ret = fopen(name, "r");
return ret;
}
static int
set_file(FILE **file, const char *name, int mode)
{
if (file_mode < 0)
file_mode = mode;
else if (file_mode != mode) {
msg("Error: mixing appending and extracting data is not supported\n");
return 1;
}
if (*file) {
msg("Error: the same append/extract option cannot be used multiple times\n");
return 1;
}
*file = open_file(name, mode == MODE_EXTRACT);
return !*file;
}
static void
trailer_update_crc(struct fwimage_trailer *tr, void *buf, int len)
{
tr->crc32 = cpu_to_be32(crc32_block(be32_to_cpu(tr->crc32), buf, len, crc_table));
}
static int
append_data(FILE *in, FILE *out, struct fwimage_trailer *tr, int maxlen)
{
while (1) {
char buf[512];
int len;
len = fread(buf, 1, sizeof(buf), in);
if (!len)
break;
maxlen -= len;
if (maxlen < 0)
return 1;
tr->size += len;
trailer_update_crc(tr, buf, len);
fwrite(buf, len, 1, out);
}
return 0;
}
static void
append_trailer(FILE *out, struct fwimage_trailer *tr)
{
tr->size = cpu_to_be32(tr->size);
fwrite(tr, sizeof(*tr), 1, out);
trailer_update_crc(tr, tr, sizeof(*tr));
}
static int
add_metadata(struct fwimage_trailer *tr)
{
struct fwimage_header hdr = {};
tr->type = FWIMAGE_INFO;
tr->size = sizeof(hdr) + sizeof(*tr);
trailer_update_crc(tr, &hdr, sizeof(hdr));
fwrite(&hdr, sizeof(hdr), 1, firmware_file);
if (append_data(metadata_file, firmware_file, tr, METADATA_MAXLEN))
return 1;
append_trailer(firmware_file, tr);
return 0;
}
static int
add_signature(struct fwimage_trailer *tr)
{
if (!signature_file)
return 0;
tr->type = FWIMAGE_SIGNATURE;
tr->size = sizeof(*tr);
if (append_data(signature_file, firmware_file, tr, SIGNATURE_MAXLEN))
return 1;
append_trailer(firmware_file, tr);
return 0;
}
static int
add_data(const char *name)
{
struct fwimage_trailer tr = {
.magic = cpu_to_be32(FWIMAGE_MAGIC),
.crc32 = ~0,
};
int file_len = 0;
int ret = 0;
firmware_file = fopen(name, "r+");
if (!firmware_file) {
msg("Failed to open firmware file\n");
return 1;
}
while (1) {
char buf[512];
int len;
len = fread(buf, 1, sizeof(buf), firmware_file);
if (!len)
break;
file_len += len;
trailer_update_crc(&tr, buf, len);
}
if (metadata_file)
ret = add_metadata(&tr);
else if (signature_file)
ret = add_signature(&tr);
if (ret) {
fflush(firmware_file);
ftruncate(fileno(firmware_file), file_len);
}
return ret;
}
static void
remove_tail(struct data_buf *dbuf, int len)
{
dbuf->cur_len -= len;
dbuf->file_len -= len;
if (dbuf->cur_len)
return;
free(dbuf->cur);
dbuf->cur = dbuf->prev;
dbuf->prev = NULL;
dbuf->cur_len = BUFLEN;
}
static int
extract_tail(struct data_buf *dbuf, void *dest, int len)
{
int cur_len = dbuf->cur_len;
if (!dbuf->cur)
return 1;
if (cur_len >= len)
cur_len = len;
memcpy(dest + (len - cur_len), dbuf->cur + dbuf->cur_len - cur_len, cur_len);
remove_tail(dbuf, cur_len);
cur_len = len - cur_len;
if (cur_len && !dbuf->cur)
return 1;
memcpy(dest, dbuf->cur + dbuf->cur_len - cur_len, cur_len);
remove_tail(dbuf, cur_len);
return 0;
}
static uint32_t
tail_crc32(struct data_buf *dbuf, uint32_t crc32)
{
if (dbuf->prev)
crc32 = crc32_block(crc32, dbuf->prev, BUFLEN, crc_table);
return crc32_block(crc32, dbuf->cur, dbuf->cur_len, crc_table);
}
static int
validate_metadata(struct fwimage_header *hdr, int data_len)
{
if (hdr->version != 0)
return 1;
return 0;
}
static int
extract_data(const char *name)
{
struct fwimage_header *hdr;
struct fwimage_trailer tr;
struct data_buf dbuf = {};
uint32_t crc32 = ~0;
int data_len = 0;
int ret = 1;
void *buf;
bool metadata_keep = false;
firmware_file = open_file(name, false);
if (!firmware_file) {
msg("Failed to open firmware file\n");
return 1;
}
if (truncate_file && firmware_file == stdin) {
msg("Cannot truncate file when reading from stdin\n");
return 1;
}
buf = malloc(BUFLEN);
if (!buf)
return 1;
do {
char *tmp = dbuf.cur;
if (write_truncated && dbuf.prev)
fwrite(dbuf.prev, 1, BUFLEN, stdout);
dbuf.cur = dbuf.prev;
dbuf.prev = tmp;
if (dbuf.cur)
crc32 = crc32_block(crc32, dbuf.cur, BUFLEN, crc_table);
else
dbuf.cur = malloc(BUFLEN);
if (!dbuf.cur)
goto out;
dbuf.cur_len = fread(dbuf.cur, 1, BUFLEN, firmware_file);
dbuf.file_len += dbuf.cur_len;
} while (dbuf.cur_len == BUFLEN);
while (1) {
if (extract_tail(&dbuf, &tr, sizeof(tr)))
break;
if (tr.magic != cpu_to_be32(FWIMAGE_MAGIC)) {
msg("Data not found\n");
metadata_keep = true;
break;
}
data_len = be32_to_cpu(tr.size) - sizeof(tr);
if (be32_to_cpu(tr.crc32) != tail_crc32(&dbuf, crc32)) {
msg("CRC error\n");
break;
}
if (data_len > BUFLEN) {
msg("Size error\n");
break;
}
extract_tail(&dbuf, buf, data_len);
if (tr.type == FWIMAGE_SIGNATURE) {
if (!signature_file)
continue;
fwrite(buf, data_len, 1, signature_file);
ret = 0;
break;
} else if (tr.type == FWIMAGE_INFO) {
if (!metadata_file) {
dbuf.file_len += data_len + sizeof(tr);
metadata_keep = true;
break;
}
hdr = buf;
data_len -= sizeof(*hdr);
if (validate_metadata(hdr, data_len))
continue;
fwrite(hdr + 1, data_len, 1, metadata_file);
ret = 0;
break;
} else {
continue;
}
}
if (!ret && truncate_file)
ftruncate(fileno(firmware_file), dbuf.file_len);
if (write_truncated) {
if (dbuf.prev)
fwrite(dbuf.prev, 1, BUFLEN, stdout);
if (dbuf.cur)
fwrite(dbuf.cur, 1, dbuf.cur_len, stdout);
if (metadata_keep) {
fwrite(buf, data_len, 1, stdout);
fwrite(&tr, sizeof(tr), 1, stdout);
}
}
out:
free(buf);
free(dbuf.cur);
free(dbuf.prev);
return ret;
}
static void cleanup(void)
{
if (signature_file)
fclose(signature_file);
if (metadata_file)
fclose(metadata_file);
if (firmware_file)
fclose(firmware_file);
}
int main(int argc, char **argv)
{
const char *progname = argv[0];
int ret, ch;
crc32_filltable(crc_table);
while ((ch = getopt(argc, argv, "i:I:qs:S:tT")) != -1) {
ret = 0;
switch(ch) {
case 'S':
ret = set_file(&signature_file, optarg, MODE_APPEND);
break;
case 'I':
ret = set_file(&metadata_file, optarg, MODE_APPEND);
break;
case 's':
ret = set_file(&signature_file, optarg, MODE_EXTRACT);
break;
case 'i':
ret = set_file(&metadata_file, optarg, MODE_EXTRACT);
break;
case 't':
truncate_file = true;
break;
case 'T':
write_truncated = true;
break;
case 'q':
quiet = true;
break;
}
if (ret)
goto out;
}
if (optind >= argc) {
ret = usage(progname);
goto out;
}
if (file_mode == MODE_DEFAULT) {
ret = usage(progname);
goto out;
}
if (signature_file && metadata_file) {
msg("Cannot append/extract metadata and signature in one run\n");
return 1;
}
if (file_mode)
ret = add_data(argv[optind]);
else
ret = extract_data(argv[optind]);
out:
cleanup();
return ret;
}

116
package/system/fwtool/src/utils.h
View File

@ -1,116 +0,0 @@
/*
* utils - misc libubox utility functions
*
* Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef __LIBUBOX_UTILS_H
#define __LIBUBOX_UTILS_H
#include <sys/types.h>
#include <stdint.h>
#include <stdbool.h>
#ifndef ARRAY_SIZE
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
#endif
#ifdef __GNUC__
#define _GNUC_MIN_VER(maj, min) (((__GNUC__ << 8) + __GNUC_MINOR__) >= (((maj) << 8) + (min)))
#else
#define _GNUC_MIN_VER(maj, min) 0
#endif
#if defined(__linux__) || defined(__CYGWIN__)
#include <byteswap.h>
#include <endian.h>
#elif defined(__APPLE__)
#include <machine/endian.h>
#include <machine/byte_order.h>
#define bswap_32(x) OSSwapInt32(x)
#define bswap_64(x) OSSwapInt64(x)
#elif defined(__FreeBSD__)
#include <sys/endian.h>
#define bswap_32(x) bswap32(x)
#define bswap_64(x) bswap64(x)
#else
#include <machine/endian.h>
#define bswap_32(x) swap32(x)
#define bswap_64(x) swap64(x)
#endif
#ifndef __BYTE_ORDER
#define __BYTE_ORDER BYTE_ORDER
#endif
#ifndef __BIG_ENDIAN
#define __BIG_ENDIAN BIG_ENDIAN
#endif
#ifndef __LITTLE_ENDIAN
#define __LITTLE_ENDIAN LITTLE_ENDIAN
#endif
static inline uint16_t __u_bswap16(uint16_t val)
{
return ((val >> 8) & 0xffu) | ((val & 0xffu) << 8);
}
#if _GNUC_MIN_VER(4, 2)
#define __u_bswap32(x) __builtin_bswap32(x)
#define __u_bswap64(x) __builtin_bswap64(x)
#else
#define __u_bswap32(x) bswap_32(x)
#define __u_bswap64(x) bswap_64(x)
#endif
#if __BYTE_ORDER == __LITTLE_ENDIAN
#define cpu_to_be64(x) __u_bswap64(x)
#define cpu_to_be32(x) __u_bswap32(x)
#define cpu_to_be16(x) __u_bswap16((uint16_t) (x))
#define be64_to_cpu(x) __u_bswap64(x)
#define be32_to_cpu(x) __u_bswap32(x)
#define be16_to_cpu(x) __u_bswap16((uint16_t) (x))
#define cpu_to_le64(x) (x)
#define cpu_to_le32(x) (x)
#define cpu_to_le16(x) (x)
#define le64_to_cpu(x) (x)
#define le32_to_cpu(x) (x)
#define le16_to_cpu(x) (x)
#else /* __BYTE_ORDER == __LITTLE_ENDIAN */
#define cpu_to_le64(x) __u_bswap64(x)
#define cpu_to_le32(x) __u_bswap32(x)
#define cpu_to_le16(x) __u_bswap16((uint16_t) (x))
#define le64_to_cpu(x) __u_bswap64(x)
#define le32_to_cpu(x) __u_bswap32(x)
#define le16_to_cpu(x) __u_bswap16((uint16_t) (x))
#define cpu_to_be64(x) (x)
#define cpu_to_be32(x) (x)
#define cpu_to_be16(x) (x)
#define be64_to_cpu(x) (x)
#define be32_to_cpu(x) (x)
#define be16_to_cpu(x) (x)
#endif
#endif