u-boot/tools/fit_image.c

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/*
* (C) Copyright 2008 Semihalf
*
* (C) Copyright 2000-2004
* DENX Software Engineering
* Wolfgang Denk, wd@denx.de
*
* Updated-by: Prafulla Wadaskar <prafulla@marvell.com>
* FIT image specific code abstracted from mkimage.c
* some functions added to address abstraction
*
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include "imagetool.h"
#include "fit_common.h"
#include "mkimage.h"
#include <image.h>
#include <stdarg.h>
#include <version.h>
#include <u-boot/crc.h>
static image_header_t header;
static int fit_add_file_data(struct image_tool_params *params, size_t size_inc,
const char *tmpfile)
{
int tfd, destfd = 0;
void *dest_blob = NULL;
off_t destfd_size = 0;
struct stat sbuf;
void *ptr;
int ret = 0;
tfd = mmap_fdt(params->cmdname, tmpfile, size_inc, &ptr, &sbuf, true);
if (tfd < 0)
return -EIO;
if (params->keydest) {
struct stat dest_sbuf;
destfd = mmap_fdt(params->cmdname, params->keydest, size_inc,
&dest_blob, &dest_sbuf, false);
if (destfd < 0) {
ret = -EIO;
goto err_keydest;
}
destfd_size = dest_sbuf.st_size;
}
/* for first image creation, add a timestamp at offset 0 i.e., root */
if (params->datafile)
ret = fit_set_timestamp(ptr, 0, sbuf.st_mtime);
if (!ret) {
ret = fit_add_verification_data(params->keydir, dest_blob, ptr,
params->comment,
params->require_keys);
}
if (dest_blob) {
munmap(dest_blob, destfd_size);
close(destfd);
}
err_keydest:
munmap(ptr, sbuf.st_size);
close(tfd);
return ret;
}
/**
* fit_calc_size() - Calculate the approximate size of the FIT we will generate
*/
static int fit_calc_size(struct image_tool_params *params)
{
struct content_info *cont;
int size, total_size;
size = imagetool_get_filesize(params, params->datafile);
if (size < 0)
return -1;
total_size = size;
for (cont = params->content_head; cont; cont = cont->next) {
size = imagetool_get_filesize(params, cont->fname);
if (size < 0)
return -1;
/* Add space for properties */
total_size += size + 300;
}
/* Add plenty of space for headers, properties, nodes, etc. */
total_size += 4096;
return total_size;
}
static int fdt_property_file(struct image_tool_params *params,
void *fdt, const char *name, const char *fname)
{
struct stat sbuf;
void *ptr;
int ret;
int fd;
fd = open(fname, O_RDWR | O_BINARY);
if (fd < 0) {
fprintf(stderr, "%s: Can't open %s: %s\n",
params->cmdname, fname, strerror(errno));
return -1;
}
if (fstat(fd, &sbuf) < 0) {
fprintf(stderr, "%s: Can't stat %s: %s\n",
params->cmdname, fname, strerror(errno));
goto err;
}
ret = fdt_property_placeholder(fdt, "data", sbuf.st_size, &ptr);
if (ret)
goto err;
ret = read(fd, ptr, sbuf.st_size);
if (ret != sbuf.st_size) {
fprintf(stderr, "%s: Can't read %s: %s\n",
params->cmdname, fname, strerror(errno));
goto err;
}
close(fd);
return 0;
err:
close(fd);
return -1;
}
static int fdt_property_strf(void *fdt, const char *name, const char *fmt, ...)
{
char str[100];
va_list ptr;
va_start(ptr, fmt);
vsnprintf(str, sizeof(str), fmt, ptr);
va_end(ptr);
return fdt_property_string(fdt, name, str);
}
static void get_basename(char *str, int size, const char *fname)
{
const char *p, *start, *end;
int len;
/*
* Use the base name as the 'name' field. So for example:
*
* "arch/arm/dts/sun7i-a20-bananapro.dtb"
* becomes "sun7i-a20-bananapro"
*/
p = strrchr(fname, '/');
start = p ? p + 1 : fname;
p = strrchr(fname, '.');
end = p ? p : fname + strlen(fname);
len = end - start;
if (len >= size)
len = size - 1;
memcpy(str, start, len);
str[len] = '\0';
}
/**
* fit_write_images() - Write out a list of images to the FIT
*
* We always include the main image (params->datafile). If there are device
* tree files, we include an fdt@ node for each of those too.
*/
static int fit_write_images(struct image_tool_params *params, char *fdt)
{
struct content_info *cont;
const char *typename;
char str[100];
int upto;
int ret;
fdt_begin_node(fdt, "images");
/* First the main image */
typename = genimg_get_type_short_name(params->fit_image_type);
snprintf(str, sizeof(str), "%s@1", typename);
fdt_begin_node(fdt, str);
fdt_property_string(fdt, "description", params->imagename);
fdt_property_string(fdt, "type", typename);
fdt_property_string(fdt, "arch", genimg_get_arch_name(params->arch));
fdt_property_string(fdt, "os", genimg_get_os_short_name(params->os));
fdt_property_string(fdt, "compression",
genimg_get_comp_short_name(params->comp));
fdt_property_u32(fdt, "load", params->addr);
fdt_property_u32(fdt, "entry", params->ep);
/*
* Put data last since it is large. SPL may only load the first part
* of the DT, so this way it can access all the above fields.
*/
ret = fdt_property_file(params, fdt, "data", params->datafile);
if (ret)
return ret;
fdt_end_node(fdt);
/* Now the device tree files if available */
upto = 0;
for (cont = params->content_head; cont; cont = cont->next) {
if (cont->type != IH_TYPE_FLATDT)
continue;
snprintf(str, sizeof(str), "%s@%d", FIT_FDT_PROP, ++upto);
fdt_begin_node(fdt, str);
get_basename(str, sizeof(str), cont->fname);
fdt_property_string(fdt, "description", str);
ret = fdt_property_file(params, fdt, "data", cont->fname);
if (ret)
return ret;
fdt_property_string(fdt, "type", typename);
fdt_property_string(fdt, "arch",
genimg_get_arch_short_name(params->arch));
fdt_property_string(fdt, "compression",
genimg_get_comp_short_name(IH_COMP_NONE));
fdt_end_node(fdt);
}
fdt_end_node(fdt);
return 0;
}
/**
* fit_write_configs() - Write out a list of configurations to the FIT
*
* If there are device tree files, we include a configuration for each, which
* selects the main image (params->datafile) and its corresponding device
* tree file.
*
* Otherwise we just create a configuration with the main image in it.
*/
static void fit_write_configs(struct image_tool_params *params, char *fdt)
{
struct content_info *cont;
const char *typename;
char str[100];
int upto;
fdt_begin_node(fdt, "configurations");
fdt_property_string(fdt, "default", "conf@1");
upto = 0;
for (cont = params->content_head; cont; cont = cont->next) {
if (cont->type != IH_TYPE_FLATDT)
continue;
typename = genimg_get_type_short_name(cont->type);
snprintf(str, sizeof(str), "conf@%d", ++upto);
fdt_begin_node(fdt, str);
get_basename(str, sizeof(str), cont->fname);
fdt_property_string(fdt, "description", str);
typename = genimg_get_type_short_name(params->fit_image_type);
snprintf(str, sizeof(str), "%s@1", typename);
fdt_property_string(fdt, typename, str);
snprintf(str, sizeof(str), FIT_FDT_PROP "@%d", upto);
fdt_property_string(fdt, FIT_FDT_PROP, str);
fdt_end_node(fdt);
}
if (!upto) {
fdt_begin_node(fdt, "conf@1");
typename = genimg_get_type_short_name(params->fit_image_type);
snprintf(str, sizeof(str), "%s@1", typename);
fdt_property_string(fdt, typename, str);
fdt_end_node(fdt);
}
fdt_end_node(fdt);
}
static int fit_build_fdt(struct image_tool_params *params, char *fdt, int size)
{
int ret;
ret = fdt_create(fdt, size);
if (ret)
return ret;
fdt_finish_reservemap(fdt);
fdt_begin_node(fdt, "");
fdt_property_strf(fdt, "description",
"%s image with one or more FDT blobs",
genimg_get_type_name(params->fit_image_type));
fdt_property_strf(fdt, "creator", "U-Boot mkimage %s", PLAIN_VERSION);
fdt_property_u32(fdt, "#address-cells", 1);
ret = fit_write_images(params, fdt);
if (ret)
return ret;
fit_write_configs(params, fdt);
fdt_end_node(fdt);
ret = fdt_finish(fdt);
if (ret)
return ret;
return fdt_totalsize(fdt);
}
static int fit_build(struct image_tool_params *params, const char *fname)
{
char *buf;
int size;
int ret;
int fd;
size = fit_calc_size(params);
if (size < 0)
return -1;
buf = malloc(size);
if (!buf) {
fprintf(stderr, "%s: Out of memory (%d bytes)\n",
params->cmdname, size);
return -1;
}
ret = fit_build_fdt(params, buf, size);
if (ret < 0) {
fprintf(stderr, "%s: Failed to build FIT image\n",
params->cmdname);
goto err_buf;
}
size = ret;
fd = open(fname, O_RDWR | O_CREAT | O_TRUNC | O_BINARY, 0666);
if (fd < 0) {
fprintf(stderr, "%s: Can't open %s: %s\n",
params->cmdname, fname, strerror(errno));
goto err;
}
ret = write(fd, buf, size);
if (ret != size) {
fprintf(stderr, "%s: Can't write %s: %s\n",
params->cmdname, fname, strerror(errno));
goto err;
}
close(fd);
free(buf);
return 0;
err:
close(fd);
err_buf:
free(buf);
return -1;
}
/**
* fit_extract_data() - Move all data outside the FIT
*
* This takes a normal FIT file and removes all the 'data' properties from it.
* The data is placed in an area after the FIT so that it can be accessed
* using an offset into that area. The 'data' properties turn into
* 'data-offset' properties.
*
* This function cannot cope with FITs with 'data-offset' properties. All
* data must be in 'data' properties on entry.
*/
static int fit_extract_data(struct image_tool_params *params, const char *fname)
{
void *buf;
int buf_ptr;
int fit_size, new_size;
int fd;
struct stat sbuf;
void *fdt;
int ret;
int images;
int node;
fd = mmap_fdt(params->cmdname, fname, 0, &fdt, &sbuf, false);
if (fd < 0)
return -EIO;
fit_size = fdt_totalsize(fdt);
/* Allocate space to hold the image data we will extract */
buf = malloc(fit_size);
if (!buf) {
ret = -ENOMEM;
goto err_munmap;
}
buf_ptr = 0;
images = fdt_path_offset(fdt, FIT_IMAGES_PATH);
if (images < 0) {
debug("%s: Cannot find /images node: %d\n", __func__, images);
ret = -EINVAL;
goto err_munmap;
}
for (node = fdt_first_subnode(fdt, images);
node >= 0;
node = fdt_next_subnode(fdt, node)) {
const char *data;
int len;
data = fdt_getprop(fdt, node, "data", &len);
if (!data)
continue;
memcpy(buf + buf_ptr, data, len);
debug("Extracting data size %x\n", len);
ret = fdt_delprop(fdt, node, "data");
if (ret) {
ret = -EPERM;
goto err_munmap;
}
if (params->external_offset > 0) {
/* An external offset positions the data absolutely. */
fdt_setprop_u32(fdt, node, "data-position",
params->external_offset + buf_ptr);
} else {
fdt_setprop_u32(fdt, node, "data-offset", buf_ptr);
}
fdt_setprop_u32(fdt, node, "data-size", len);
buf_ptr += (len + 3) & ~3;
}
/* Pack the FDT and place the data after it */
fdt_pack(fdt);
debug("Size reduced from %x to %x\n", fit_size, fdt_totalsize(fdt));
debug("External data size %x\n", buf_ptr);
new_size = fdt_totalsize(fdt);
new_size = (new_size + 3) & ~3;
munmap(fdt, sbuf.st_size);
if (ftruncate(fd, new_size)) {
debug("%s: Failed to truncate file: %s\n", __func__,
strerror(errno));
ret = -EIO;
goto err;
}
/* Check if an offset for the external data was set. */
if (params->external_offset > 0) {
if (params->external_offset < new_size) {
debug("External offset %x overlaps FIT length %x",
params->external_offset, new_size);
ret = -EINVAL;
goto err;
}
new_size = params->external_offset;
}
if (lseek(fd, new_size, SEEK_SET) < 0) {
debug("%s: Failed to seek to end of file: %s\n", __func__,
strerror(errno));
ret = -EIO;
goto err;
}
if (write(fd, buf, buf_ptr) != buf_ptr) {
debug("%s: Failed to write external data to file %s\n",
__func__, strerror(errno));
ret = -EIO;
goto err;
}
close(fd);
return 0;
err_munmap:
munmap(fdt, sbuf.st_size);
err:
if (buf)
free(buf);
close(fd);
return ret;
}
static int fit_import_data(struct image_tool_params *params, const char *fname)
{
void *fdt, *old_fdt;
int fit_size, new_size, size, data_base;
int fd;
struct stat sbuf;
int ret;
int images;
int node;
fd = mmap_fdt(params->cmdname, fname, 0, &old_fdt, &sbuf, false);
if (fd < 0)
return -EIO;
fit_size = fdt_totalsize(old_fdt);
data_base = (fit_size + 3) & ~3;
/* Allocate space to hold the new FIT */
size = sbuf.st_size + 16384;
fdt = malloc(size);
if (!fdt) {
fprintf(stderr, "%s: Failed to allocate memory (%d bytes)\n",
__func__, size);
ret = -ENOMEM;
goto err;
}
ret = fdt_open_into(old_fdt, fdt, size);
if (ret) {
debug("%s: Failed to expand FIT: %s\n", __func__,
fdt_strerror(errno));
ret = -EINVAL;
goto err;
}
images = fdt_path_offset(fdt, FIT_IMAGES_PATH);
if (images < 0) {
debug("%s: Cannot find /images node: %d\n", __func__, images);
ret = -EINVAL;
goto err;
}
for (node = fdt_first_subnode(fdt, images);
node >= 0;
node = fdt_next_subnode(fdt, node)) {
int buf_ptr;
int len;
buf_ptr = fdtdec_get_int(fdt, node, "data-offset", -1);
len = fdtdec_get_int(fdt, node, "data-size", -1);
if (buf_ptr == -1 || len == -1)
continue;
debug("Importing data size %x\n", len);
ret = fdt_setprop(fdt, node, "data", fdt + data_base + buf_ptr,
len);
if (ret) {
debug("%s: Failed to write property: %s\n", __func__,
fdt_strerror(ret));
ret = -EINVAL;
goto err;
}
}
munmap(old_fdt, sbuf.st_size);
close(fd);
/* Pack the FDT and place the data after it */
fdt_pack(fdt);
new_size = fdt_totalsize(fdt);
debug("Size expanded from %x to %x\n", fit_size, new_size);
fd = open(fname, O_RDWR | O_CREAT | O_TRUNC | O_BINARY, 0666);
if (fd < 0) {
fprintf(stderr, "%s: Can't open %s: %s\n",
params->cmdname, fname, strerror(errno));
free(fdt);
return -EIO;
}
if (write(fd, fdt, new_size) != new_size) {
debug("%s: Failed to write external data to file %s\n",
__func__, strerror(errno));
ret = -EIO;
goto err;
}
ret = 0;
err:
free(fdt);
close(fd);
return ret;
}
/**
* fit_handle_file - main FIT file processing function
*
* fit_handle_file() runs dtc to convert .its to .itb, includes
* binary data, updates timestamp property and calculates hashes.
*
* datafile - .its file
* imagefile - .itb file
*
* returns:
* only on success, otherwise calls exit (EXIT_FAILURE);
*/
static int fit_handle_file(struct image_tool_params *params)
{
char tmpfile[MKIMAGE_MAX_TMPFILE_LEN];
char cmd[MKIMAGE_MAX_DTC_CMDLINE_LEN];
size_t size_inc;
int ret;
/* Flattened Image Tree (FIT) format handling */
debug ("FIT format handling\n");
/* call dtc to include binary properties into the tmp file */
if (strlen (params->imagefile) +
strlen (MKIMAGE_TMPFILE_SUFFIX) + 1 > sizeof (tmpfile)) {
fprintf (stderr, "%s: Image file name (%s) too long, "
"can't create tmpfile",
params->imagefile, params->cmdname);
return (EXIT_FAILURE);
}
sprintf (tmpfile, "%s%s", params->imagefile, MKIMAGE_TMPFILE_SUFFIX);
/* We either compile the source file, or use the existing FIT image */
if (params->auto_its) {
if (fit_build(params, tmpfile)) {
fprintf(stderr, "%s: failed to build FIT\n",
params->cmdname);
return EXIT_FAILURE;
}
*cmd = '\0';
} else if (params->datafile) {
/* dtc -I dts -O dtb -p 500 datafile > tmpfile */
snprintf(cmd, sizeof(cmd), "%s %s %s > %s",
MKIMAGE_DTC, params->dtc, params->datafile, tmpfile);
debug("Trying to execute \"%s\"\n", cmd);
} else {
snprintf(cmd, sizeof(cmd), "cp %s %s",
params->imagefile, tmpfile);
}
if (*cmd && system(cmd) == -1) {
fprintf (stderr, "%s: system(%s) failed: %s\n",
params->cmdname, cmd, strerror(errno));
goto err_system;
}
/* Move the data so it is internal to the FIT, if needed */
ret = fit_import_data(params, tmpfile);
if (ret)
goto err_system;
/*
* Set hashes for images in the blob. Unfortunately we may need more
* space in either FDT, so keep trying until we succeed.
*
* Note: this is pretty inefficient for signing, since we must
* calculate the signature every time. It would be better to calculate
* all the data and then store it in a separate step. However, this
* would be considerably more complex to implement. Generally a few
* steps of this loop is enough to sign with several keys.
*/
for (size_inc = 0; size_inc < 64 * 1024; size_inc += 1024) {
ret = fit_add_file_data(params, size_inc, tmpfile);
if (!ret || ret != -ENOSPC)
break;
}
if (ret) {
fprintf(stderr, "%s Can't add hashes to FIT blob\n",
params->cmdname);
goto err_system;
}
/* Move the data so it is external to the FIT, if requested */
if (params->external_data) {
ret = fit_extract_data(params, tmpfile);
if (ret)
goto err_system;
}
if (rename (tmpfile, params->imagefile) == -1) {
fprintf (stderr, "%s: Can't rename %s to %s: %s\n",
params->cmdname, tmpfile, params->imagefile,
strerror (errno));
unlink (tmpfile);
unlink (params->imagefile);
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
err_system:
unlink(tmpfile);
return -1;
}
/**
* fit_image_extract - extract a FIT component image
* @fit: pointer to the FIT format image header
* @image_noffset: offset of the component image node
* @file_name: name of the file to store the FIT sub-image
*
* returns:
* zero in case of success or a negative value if fail.
*/
static int fit_image_extract(
const void *fit,
int image_noffset,
const char *file_name)
{
const void *file_data;
size_t file_size = 0;
/* get the "data" property of component at offset "image_noffset" */
fit_image_get_data(fit, image_noffset, &file_data, &file_size);
/* save the "file_data" into the file specified by "file_name" */
return imagetool_save_subimage(file_name, (ulong) file_data, file_size);
}
/**
* fit_extract_contents - retrieve a sub-image component from the FIT image
* @ptr: pointer to the FIT format image header
* @params: command line parameters
*
* returns:
* zero in case of success or a negative value if fail.
*/
static int fit_extract_contents(void *ptr, struct image_tool_params *params)
{
int images_noffset;
int noffset;
int ndepth;
const void *fit = ptr;
int count = 0;
const char *p;
/* Indent string is defined in header image.h */
p = IMAGE_INDENT_STRING;
if (!fit_check_format(fit)) {
printf("Bad FIT image format\n");
return -1;
}
/* Find images parent node offset */
images_noffset = fdt_path_offset(fit, FIT_IMAGES_PATH);
if (images_noffset < 0) {
printf("Can't find images parent node '%s' (%s)\n",
FIT_IMAGES_PATH, fdt_strerror(images_noffset));
return -1;
}
/* Avoid any overrun */
count = fit_get_subimage_count(fit, images_noffset);
if ((params->pflag < 0) || (count <= params->pflag)) {
printf("No such component at '%d'\n", params->pflag);
return -1;
}
/* Process its subnodes, extract the desired component from image */
for (ndepth = 0, count = 0,
noffset = fdt_next_node(fit, images_noffset, &ndepth);
(noffset >= 0) && (ndepth > 0);
noffset = fdt_next_node(fit, noffset, &ndepth)) {
if (ndepth == 1) {
/*
* Direct child node of the images parent node,
* i.e. component image node.
*/
if (params->pflag == count) {
printf("Extracted:\n%s Image %u (%s)\n", p,
count, fit_get_name(fit, noffset, NULL));
fit_image_print(fit, noffset, p);
return fit_image_extract(fit, noffset,
params->outfile);
}
count++;
}
}
return 0;
}
static int fit_check_params(struct image_tool_params *params)
{
if (params->auto_its)
return 0;
return ((params->dflag && (params->fflag || params->lflag)) ||
(params->fflag && (params->dflag || params->lflag)) ||
(params->lflag && (params->dflag || params->fflag)));
}
U_BOOT_IMAGE_TYPE(
fitimage,
"FIT Image support",
sizeof(image_header_t),
(void *)&header,
fit_check_params,
fit_verify_header,
fit_print_contents,
NULL,
fit_extract_contents,
fit_check_image_types,
fit_handle_file,
NULL /* FIT images use DTB header */
);