mirror of
https://github.com/u-boot/u-boot.git
synced 2024-12-12 22:33:27 +08:00
2b9912e6a7
commit 18b06652cd
"tools: include u-boot version of sha256.h"
unconditionally forced the sha256.h from u-boot to be used
for tools instead of the host version. This is fragile though
as it will also include the host version. Therefore move it
to include/u-boot to join u-boot/md5.h etc which were renamed
for the same reason.
cc: Simon Glass <sjg@chromium.org>
Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
473 lines
11 KiB
C
473 lines
11 KiB
C
/*
|
|
* Copyright (c) 2013, Google Inc.
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#ifdef USE_HOSTCC
|
|
#include "mkimage.h"
|
|
#include <time.h>
|
|
#else
|
|
#include <common.h>
|
|
#include <malloc.h>
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
#endif /* !USE_HOSTCC*/
|
|
#include <image.h>
|
|
#include <u-boot/rsa.h>
|
|
#include <u-boot/rsa-checksum.h>
|
|
|
|
#define IMAGE_MAX_HASHED_NODES 100
|
|
|
|
#ifdef USE_HOSTCC
|
|
void *host_blob;
|
|
void image_set_host_blob(void *blob)
|
|
{
|
|
host_blob = blob;
|
|
}
|
|
void *image_get_host_blob(void)
|
|
{
|
|
return host_blob;
|
|
}
|
|
#endif
|
|
|
|
struct checksum_algo checksum_algos[] = {
|
|
{
|
|
"sha1",
|
|
SHA1_SUM_LEN,
|
|
RSA2048_BYTES,
|
|
#if IMAGE_ENABLE_SIGN
|
|
EVP_sha1,
|
|
#endif
|
|
sha1_calculate,
|
|
padding_sha1_rsa2048,
|
|
},
|
|
{
|
|
"sha256",
|
|
SHA256_SUM_LEN,
|
|
RSA2048_BYTES,
|
|
#if IMAGE_ENABLE_SIGN
|
|
EVP_sha256,
|
|
#endif
|
|
sha256_calculate,
|
|
padding_sha256_rsa2048,
|
|
},
|
|
{
|
|
"sha256",
|
|
SHA256_SUM_LEN,
|
|
RSA4096_BYTES,
|
|
#if IMAGE_ENABLE_SIGN
|
|
EVP_sha256,
|
|
#endif
|
|
sha256_calculate,
|
|
padding_sha256_rsa4096,
|
|
}
|
|
|
|
};
|
|
|
|
struct image_sig_algo image_sig_algos[] = {
|
|
{
|
|
"sha1,rsa2048",
|
|
rsa_sign,
|
|
rsa_add_verify_data,
|
|
rsa_verify,
|
|
&checksum_algos[0],
|
|
},
|
|
{
|
|
"sha256,rsa2048",
|
|
rsa_sign,
|
|
rsa_add_verify_data,
|
|
rsa_verify,
|
|
&checksum_algos[1],
|
|
},
|
|
{
|
|
"sha256,rsa4096",
|
|
rsa_sign,
|
|
rsa_add_verify_data,
|
|
rsa_verify,
|
|
&checksum_algos[2],
|
|
}
|
|
|
|
};
|
|
|
|
struct image_sig_algo *image_get_sig_algo(const char *name)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(image_sig_algos); i++) {
|
|
if (!strcmp(image_sig_algos[i].name, name))
|
|
return &image_sig_algos[i];
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* fit_region_make_list() - Make a list of image regions
|
|
*
|
|
* Given a list of fdt_regions, create a list of image_regions. This is a
|
|
* simple conversion routine since the FDT and image code use different
|
|
* structures.
|
|
*
|
|
* @fit: FIT image
|
|
* @fdt_regions: Pointer to FDT regions
|
|
* @count: Number of FDT regions
|
|
* @region: Pointer to image regions, which must hold @count records. If
|
|
* region is NULL, then (except for an SPL build) the array will be
|
|
* allocated.
|
|
* @return: Pointer to image regions
|
|
*/
|
|
struct image_region *fit_region_make_list(const void *fit,
|
|
struct fdt_region *fdt_regions, int count,
|
|
struct image_region *region)
|
|
{
|
|
int i;
|
|
|
|
debug("Hash regions:\n");
|
|
debug("%10s %10s\n", "Offset", "Size");
|
|
|
|
/*
|
|
* Use malloc() except in SPL (to save code size). In SPL the caller
|
|
* must allocate the array.
|
|
*/
|
|
#ifndef CONFIG_SPL_BUILD
|
|
if (!region)
|
|
region = calloc(sizeof(*region), count);
|
|
#endif
|
|
if (!region)
|
|
return NULL;
|
|
for (i = 0; i < count; i++) {
|
|
debug("%10x %10x\n", fdt_regions[i].offset,
|
|
fdt_regions[i].size);
|
|
region[i].data = fit + fdt_regions[i].offset;
|
|
region[i].size = fdt_regions[i].size;
|
|
}
|
|
|
|
return region;
|
|
}
|
|
|
|
static int fit_image_setup_verify(struct image_sign_info *info,
|
|
const void *fit, int noffset, int required_keynode,
|
|
char **err_msgp)
|
|
{
|
|
char *algo_name;
|
|
|
|
if (fit_image_hash_get_algo(fit, noffset, &algo_name)) {
|
|
*err_msgp = "Can't get hash algo property";
|
|
return -1;
|
|
}
|
|
memset(info, '\0', sizeof(*info));
|
|
info->keyname = fdt_getprop(fit, noffset, "key-name-hint", NULL);
|
|
info->fit = (void *)fit;
|
|
info->node_offset = noffset;
|
|
info->algo = image_get_sig_algo(algo_name);
|
|
info->fdt_blob = gd_fdt_blob();
|
|
info->required_keynode = required_keynode;
|
|
printf("%s:%s", algo_name, info->keyname);
|
|
|
|
if (!info->algo) {
|
|
*err_msgp = "Unknown signature algorithm";
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int fit_image_check_sig(const void *fit, int noffset, const void *data,
|
|
size_t size, int required_keynode, char **err_msgp)
|
|
{
|
|
struct image_sign_info info;
|
|
struct image_region region;
|
|
uint8_t *fit_value;
|
|
int fit_value_len;
|
|
|
|
*err_msgp = NULL;
|
|
if (fit_image_setup_verify(&info, fit, noffset, required_keynode,
|
|
err_msgp))
|
|
return -1;
|
|
|
|
if (fit_image_hash_get_value(fit, noffset, &fit_value,
|
|
&fit_value_len)) {
|
|
*err_msgp = "Can't get hash value property";
|
|
return -1;
|
|
}
|
|
|
|
region.data = data;
|
|
region.size = size;
|
|
|
|
if (info.algo->verify(&info, ®ion, 1, fit_value, fit_value_len)) {
|
|
*err_msgp = "Verification failed";
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int fit_image_verify_sig(const void *fit, int image_noffset,
|
|
const char *data, size_t size, const void *sig_blob,
|
|
int sig_offset)
|
|
{
|
|
int noffset;
|
|
char *err_msg = "";
|
|
int verified = 0;
|
|
int ret;
|
|
|
|
/* 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 *name = fit_get_name(fit, noffset, NULL);
|
|
|
|
if (!strncmp(name, FIT_SIG_NODENAME,
|
|
strlen(FIT_SIG_NODENAME))) {
|
|
ret = fit_image_check_sig(fit, noffset, data,
|
|
size, -1, &err_msg);
|
|
if (ret) {
|
|
puts("- ");
|
|
} else {
|
|
puts("+ ");
|
|
verified = 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (noffset == -FDT_ERR_TRUNCATED || noffset == -FDT_ERR_BADSTRUCTURE) {
|
|
err_msg = "Corrupted or truncated tree";
|
|
goto error;
|
|
}
|
|
|
|
return verified ? 0 : -EPERM;
|
|
|
|
error:
|
|
printf(" error!\n%s for '%s' hash node in '%s' image node\n",
|
|
err_msg, fit_get_name(fit, noffset, NULL),
|
|
fit_get_name(fit, image_noffset, NULL));
|
|
return -1;
|
|
}
|
|
|
|
int fit_image_verify_required_sigs(const void *fit, int image_noffset,
|
|
const char *data, size_t size, const void *sig_blob,
|
|
int *no_sigsp)
|
|
{
|
|
int verify_count = 0;
|
|
int noffset;
|
|
int sig_node;
|
|
|
|
/* Work out what we need to verify */
|
|
*no_sigsp = 1;
|
|
sig_node = fdt_subnode_offset(sig_blob, 0, FIT_SIG_NODENAME);
|
|
if (sig_node < 0) {
|
|
debug("%s: No signature node found: %s\n", __func__,
|
|
fdt_strerror(sig_node));
|
|
return 0;
|
|
}
|
|
|
|
for (noffset = fdt_first_subnode(sig_blob, sig_node);
|
|
noffset >= 0;
|
|
noffset = fdt_next_subnode(sig_blob, noffset)) {
|
|
const char *required;
|
|
int ret;
|
|
|
|
required = fdt_getprop(sig_blob, noffset, "required", NULL);
|
|
if (!required || strcmp(required, "image"))
|
|
continue;
|
|
ret = fit_image_verify_sig(fit, image_noffset, data, size,
|
|
sig_blob, noffset);
|
|
if (ret) {
|
|
printf("Failed to verify required signature '%s'\n",
|
|
fit_get_name(sig_blob, noffset, NULL));
|
|
return ret;
|
|
}
|
|
verify_count++;
|
|
}
|
|
|
|
if (verify_count)
|
|
*no_sigsp = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int fit_config_check_sig(const void *fit, int noffset, int required_keynode,
|
|
char **err_msgp)
|
|
{
|
|
char * const exc_prop[] = {"data"};
|
|
const char *prop, *end, *name;
|
|
struct image_sign_info info;
|
|
const uint32_t *strings;
|
|
uint8_t *fit_value;
|
|
int fit_value_len;
|
|
int max_regions;
|
|
int i, prop_len;
|
|
char path[200];
|
|
int count;
|
|
|
|
debug("%s: fdt=%p, conf='%s', sig='%s'\n", __func__, gd_fdt_blob(),
|
|
fit_get_name(fit, noffset, NULL),
|
|
fit_get_name(gd_fdt_blob(), required_keynode, NULL));
|
|
*err_msgp = NULL;
|
|
if (fit_image_setup_verify(&info, fit, noffset, required_keynode,
|
|
err_msgp))
|
|
return -1;
|
|
|
|
if (fit_image_hash_get_value(fit, noffset, &fit_value,
|
|
&fit_value_len)) {
|
|
*err_msgp = "Can't get hash value property";
|
|
return -1;
|
|
}
|
|
|
|
/* Count the number of strings in the property */
|
|
prop = fdt_getprop(fit, noffset, "hashed-nodes", &prop_len);
|
|
end = prop ? prop + prop_len : prop;
|
|
for (name = prop, count = 0; name < end; name++)
|
|
if (!*name)
|
|
count++;
|
|
if (!count) {
|
|
*err_msgp = "Can't get hashed-nodes property";
|
|
return -1;
|
|
}
|
|
|
|
/* Add a sanity check here since we are using the stack */
|
|
if (count > IMAGE_MAX_HASHED_NODES) {
|
|
*err_msgp = "Number of hashed nodes exceeds maximum";
|
|
return -1;
|
|
}
|
|
|
|
/* Create a list of node names from those strings */
|
|
char *node_inc[count];
|
|
|
|
debug("Hash nodes (%d):\n", count);
|
|
for (name = prop, i = 0; name < end; name += strlen(name) + 1, i++) {
|
|
debug(" '%s'\n", name);
|
|
node_inc[i] = (char *)name;
|
|
}
|
|
|
|
/*
|
|
* Each node can generate one region for each sub-node. Allow for
|
|
* 7 sub-nodes (hash@1, signature@1, etc.) and some extra.
|
|
*/
|
|
max_regions = 20 + count * 7;
|
|
struct fdt_region fdt_regions[max_regions];
|
|
|
|
/* Get a list of regions to hash */
|
|
count = fdt_find_regions(fit, node_inc, count,
|
|
exc_prop, ARRAY_SIZE(exc_prop),
|
|
fdt_regions, max_regions - 1,
|
|
path, sizeof(path), 0);
|
|
if (count < 0) {
|
|
*err_msgp = "Failed to hash configuration";
|
|
return -1;
|
|
}
|
|
if (count == 0) {
|
|
*err_msgp = "No data to hash";
|
|
return -1;
|
|
}
|
|
if (count >= max_regions - 1) {
|
|
*err_msgp = "Too many hash regions";
|
|
return -1;
|
|
}
|
|
|
|
/* Add the strings */
|
|
strings = fdt_getprop(fit, noffset, "hashed-strings", NULL);
|
|
if (strings) {
|
|
fdt_regions[count].offset = fdt_off_dt_strings(fit) +
|
|
fdt32_to_cpu(strings[0]);
|
|
fdt_regions[count].size = fdt32_to_cpu(strings[1]);
|
|
count++;
|
|
}
|
|
|
|
/* Allocate the region list on the stack */
|
|
struct image_region region[count];
|
|
|
|
fit_region_make_list(fit, fdt_regions, count, region);
|
|
if (info.algo->verify(&info, region, count, fit_value,
|
|
fit_value_len)) {
|
|
*err_msgp = "Verification failed";
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int fit_config_verify_sig(const void *fit, int conf_noffset,
|
|
const void *sig_blob, int sig_offset)
|
|
{
|
|
int noffset;
|
|
char *err_msg = "";
|
|
int verified = 0;
|
|
int ret;
|
|
|
|
/* Process all hash subnodes of the component conf node */
|
|
for (noffset = fdt_first_subnode(fit, conf_noffset);
|
|
noffset >= 0;
|
|
noffset = fdt_next_subnode(fit, noffset)) {
|
|
const char *name = fit_get_name(fit, noffset, NULL);
|
|
|
|
if (!strncmp(name, FIT_SIG_NODENAME,
|
|
strlen(FIT_SIG_NODENAME))) {
|
|
ret = fit_config_check_sig(fit, noffset, sig_offset,
|
|
&err_msg);
|
|
if (ret) {
|
|
puts("- ");
|
|
} else {
|
|
puts("+ ");
|
|
verified = 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (noffset == -FDT_ERR_TRUNCATED || noffset == -FDT_ERR_BADSTRUCTURE) {
|
|
err_msg = "Corrupted or truncated tree";
|
|
goto error;
|
|
}
|
|
|
|
return verified ? 0 : -EPERM;
|
|
|
|
error:
|
|
printf(" error!\n%s for '%s' hash node in '%s' config node\n",
|
|
err_msg, fit_get_name(fit, noffset, NULL),
|
|
fit_get_name(fit, conf_noffset, NULL));
|
|
return -1;
|
|
}
|
|
|
|
int fit_config_verify_required_sigs(const void *fit, int conf_noffset,
|
|
const void *sig_blob)
|
|
{
|
|
int noffset;
|
|
int sig_node;
|
|
|
|
/* Work out what we need to verify */
|
|
sig_node = fdt_subnode_offset(sig_blob, 0, FIT_SIG_NODENAME);
|
|
if (sig_node < 0) {
|
|
debug("%s: No signature node found: %s\n", __func__,
|
|
fdt_strerror(sig_node));
|
|
return 0;
|
|
}
|
|
|
|
for (noffset = fdt_first_subnode(sig_blob, sig_node);
|
|
noffset >= 0;
|
|
noffset = fdt_next_subnode(sig_blob, noffset)) {
|
|
const char *required;
|
|
int ret;
|
|
|
|
required = fdt_getprop(sig_blob, noffset, "required", NULL);
|
|
if (!required || strcmp(required, "conf"))
|
|
continue;
|
|
ret = fit_config_verify_sig(fit, conf_noffset, sig_blob,
|
|
noffset);
|
|
if (ret) {
|
|
printf("Failed to verify required signature '%s'\n",
|
|
fit_get_name(sig_blob, noffset, NULL));
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int fit_config_verify(const void *fit, int conf_noffset)
|
|
{
|
|
return fit_config_verify_required_sigs(fit, conf_noffset,
|
|
gd_fdt_blob());
|
|
}
|