mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-20 08:58:52 +09:00
![Simon Glass](/assets/img/avatar_default.png)
We intend to add signatures to FITs also, so rename this function so that it is not specific to hashing. Also rename fit_image_set_hashes() and make it static since it is not used outside this file. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Marek Vasut <marex@denx.de>
209 lines
5.6 KiB
C
209 lines
5.6 KiB
C
/*
|
|
* Copyright (c) 2013, Google Inc.
|
|
*
|
|
* (C) Copyright 2008 Semihalf
|
|
*
|
|
* (C) Copyright 2000-2006
|
|
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* 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 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 to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*/
|
|
|
|
#include "mkimage.h"
|
|
#include <bootstage.h>
|
|
#include <image.h>
|
|
#include <sha1.h>
|
|
#include <time.h>
|
|
#include <u-boot/crc.h>
|
|
#include <u-boot/md5.h>
|
|
|
|
/**
|
|
* fit_set_hash_value - set hash value in requested has node
|
|
* @fit: pointer to the FIT format image header
|
|
* @noffset: hash node offset
|
|
* @value: hash value to be set
|
|
* @value_len: hash value length
|
|
*
|
|
* fit_set_hash_value() attempts to set hash value in a node at offset
|
|
* given and returns operation status to the caller.
|
|
*
|
|
* returns
|
|
* 0, on success
|
|
* -1, on failure
|
|
*/
|
|
static int fit_set_hash_value(void *fit, int noffset, uint8_t *value,
|
|
int value_len)
|
|
{
|
|
int ret;
|
|
|
|
ret = fdt_setprop(fit, noffset, FIT_VALUE_PROP, value, value_len);
|
|
if (ret) {
|
|
printf("Can't set hash '%s' property for '%s' node(%s)\n",
|
|
FIT_VALUE_PROP, fit_get_name(fit, noffset, NULL),
|
|
fdt_strerror(ret));
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* fit_image_process_hash - Process a single subnode of the images/ node
|
|
*
|
|
* Check each subnode and process accordingly. For hash nodes we generate
|
|
* a hash of the supplised data and store it in the node.
|
|
*
|
|
* @fit: pointer to the FIT format image header
|
|
* @image_name: name of image being processes (used to display errors)
|
|
* @noffset: subnode offset
|
|
* @data: data to process
|
|
* @size: size of data in bytes
|
|
* @return 0 if ok, -1 on error
|
|
*/
|
|
static int fit_image_process_hash(void *fit, const char *image_name,
|
|
int noffset, const void *data, size_t size)
|
|
{
|
|
uint8_t value[FIT_MAX_HASH_LEN];
|
|
const char *node_name;
|
|
int value_len;
|
|
char *algo;
|
|
|
|
node_name = fit_get_name(fit, noffset, NULL);
|
|
|
|
if (fit_image_hash_get_algo(fit, noffset, &algo)) {
|
|
printf("Can't get hash algo property for '%s' hash node in '%s' image node\n",
|
|
node_name, image_name);
|
|
return -1;
|
|
}
|
|
|
|
if (calculate_hash(data, size, algo, value, &value_len)) {
|
|
printf("Unsupported hash algorithm (%s) for '%s' hash node in '%s' image node\n",
|
|
algo, node_name, image_name);
|
|
return -1;
|
|
}
|
|
|
|
if (fit_set_hash_value(fit, noffset, value, value_len)) {
|
|
printf("Can't set hash value for '%s' hash node in '%s' image node\n",
|
|
node_name, image_name);
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* fit_image_add_verification_data() - calculate/set hash data for image node
|
|
*
|
|
* This adds hash values for a component image node.
|
|
*
|
|
* All existing hash subnodes are checked, if algorithm property is set to
|
|
* one of the supported hash algorithms, hash value is computed and
|
|
* corresponding hash node property is set, for example:
|
|
*
|
|
* Input component image node structure:
|
|
*
|
|
* o image@1 (at image_noffset)
|
|
* | - data = [binary data]
|
|
* o hash@1
|
|
* |- algo = "sha1"
|
|
*
|
|
* Output component image node structure:
|
|
*
|
|
* o image@1 (at image_noffset)
|
|
* | - data = [binary data]
|
|
* o hash@1
|
|
* |- algo = "sha1"
|
|
* |- value = sha1(data)
|
|
*
|
|
* For signature details, please see doc/uImage.FIT/signature.txt
|
|
*
|
|
* @fit: Pointer to the FIT format image header
|
|
* @image_noffset: Requested component image node
|
|
* @return: 0 on success, <0 on failure
|
|
*/
|
|
int fit_image_add_verification_data(void *fit, int image_noffset)
|
|
{
|
|
const char *image_name;
|
|
const void *data;
|
|
size_t size;
|
|
int noffset;
|
|
|
|
/* Get image data and data length */
|
|
if (fit_image_get_data(fit, image_noffset, &data, &size)) {
|
|
printf("Can't get image data/size\n");
|
|
return -1;
|
|
}
|
|
|
|
image_name = fit_get_name(fit, image_noffset, NULL);
|
|
|
|
/* Process all hash subnodes of the component image node */
|
|
for (noffset = fdt_first_subnode(fit, image_noffset);
|
|
noffset >= 0;
|
|
noffset = fdt_next_subnode(fit, noffset)) {
|
|
const char *node_name;
|
|
int ret = 0;
|
|
|
|
/*
|
|
* Check subnode name, must be equal to "hash" or "signature".
|
|
* Multiple hash nodes require unique unit node
|
|
* names, e.g. hash@1, hash@2, signature@1, etc.
|
|
*/
|
|
node_name = fit_get_name(fit, noffset, NULL);
|
|
if (!strncmp(node_name, FIT_HASH_NODENAME,
|
|
strlen(FIT_HASH_NODENAME))) {
|
|
ret = fit_image_process_hash(fit, image_name, noffset,
|
|
data, size);
|
|
}
|
|
if (ret)
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int fit_add_verification_data(void *fit)
|
|
{
|
|
int images_noffset;
|
|
int noffset;
|
|
int ret;
|
|
|
|
/* 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 images_noffset;
|
|
}
|
|
|
|
/* Process its subnodes, print out component images details */
|
|
for (noffset = fdt_first_subnode(fit, images_noffset);
|
|
noffset >= 0;
|
|
noffset = fdt_next_subnode(fit, noffset)) {
|
|
/*
|
|
* Direct child node of the images parent node,
|
|
* i.e. component image node.
|
|
*/
|
|
ret = fit_image_add_verification_data(fit, noffset);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|