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tools: Pass the key blob around

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At present we rely on the key blob being in the global_data fdt_blob
pointer. This is true in U-Boot but not with tools. For clarity, pass the
parameter around.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2021-11-12 12:28:10 -07:00
parent 2ad90b3953
commit 99f844ba3a
4 changed files with 45 additions and 24 deletions
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31
boot/image-fit-sig.c
View file

@ -65,7 +65,8 @@ struct image_region *fit_region_make_list(const void *fit,
static int fit_image_setup_verify(struct image_sign_info *info,
const void *fit, int noffset,
int required_keynode, char **err_msgp)
const void *key_blob, int required_keynode,
char **err_msgp)
{
const char *algo_name;
const char *padding_name;
@ -91,7 +92,7 @@ static int fit_image_setup_verify(struct image_sign_info *info,
info->checksum = image_get_checksum_algo(algo_name);
info->crypto = image_get_crypto_algo(algo_name);
info->padding = image_get_padding_algo(padding_name);
info->fdt_blob = gd_fdt_blob();
info->fdt_blob = key_blob;
info->required_keynode = required_keynode;
printf("%s:%s", algo_name, info->keyname);
@ -104,7 +105,8 @@ static int fit_image_setup_verify(struct image_sign_info *info,
}
int fit_image_check_sig(const void *fit, int noffset, const void *data,
size_t size, int required_keynode, char **err_msgp)
size_t size, const void *key_blob, int required_keynode,
char **err_msgp)
{
struct image_sign_info info;
struct image_region region;
@ -112,8 +114,8 @@ int fit_image_check_sig(const void *fit, int noffset, const void *data,
int fit_value_len;
*err_msgp = NULL;
if (fit_image_setup_verify(&info, fit, noffset, required_keynode,
err_msgp))
if (fit_image_setup_verify(&info, fit, noffset, key_blob,
required_keynode, err_msgp))
return -1;
if (fit_image_hash_get_value(fit, noffset, &fit_value,
@ -156,8 +158,8 @@ static int fit_image_verify_sig(const void *fit, int image_noffset,
}
if (!strncmp(name, FIT_SIG_NODENAME,
strlen(FIT_SIG_NODENAME))) {
ret = fit_image_check_sig(fit, noffset, data,
size, -1, &err_msg);
ret = fit_image_check_sig(fit, noffset, data, size,
key_blob, -1, &err_msg);
if (ret) {
puts("- ");
} else {
@ -244,6 +246,7 @@ int fit_image_verify_required_sigs(const void *fit, int image_noffset,
* @noffset: Offset of the signature node being checked (e.g.
* /configurations/conf-1/signature-1)
* @conf_noffset: Offset of configuration node (e.g. /configurations/conf-1)
* @key_blob: Blob containing the keys to check against
* @required_keynode: Offset in @key_blob of the required key node,
* if any. If this is given, then the configuration wil not
* pass verification unless that key is used. If this is
@ -253,7 +256,8 @@ int fit_image_verify_required_sigs(const void *fit, int image_noffset,
* Return: 0 if all verified ok, <0 on error
*/
static int fit_config_check_sig(const void *fit, int noffset, int conf_noffset,
int required_keynode, char **err_msgp)
const void *key_blob, int required_keynode,
char **err_msgp)
{
static char * const exc_prop[] = {
"data",
@ -275,12 +279,12 @@ static int fit_config_check_sig(const void *fit, int noffset, int conf_noffset,
int count;
config_name = fit_get_name(fit, conf_noffset, NULL);
debug("%s: fdt=%p, conf='%s', sig='%s'\n", __func__, gd_fdt_blob(),
debug("%s: fdt=%p, conf='%s', sig='%s'\n", __func__, key_blob,
fit_get_name(fit, noffset, NULL),
fit_get_name(gd_fdt_blob(), required_keynode, NULL));
fit_get_name(key_blob, required_keynode, NULL));
*err_msgp = NULL;
if (fit_image_setup_verify(&info, fit, noffset, required_keynode,
err_msgp))
if (fit_image_setup_verify(&info, fit, noffset, key_blob,
required_keynode, err_msgp))
return -1;
if (fit_image_hash_get_value(fit, noffset, &fit_value,
@ -423,7 +427,8 @@ static int fit_config_verify_key(const void *fit, int conf_noffset,
if (!strncmp(name, FIT_SIG_NODENAME,
strlen(FIT_SIG_NODENAME))) {
ret = fit_config_check_sig(fit, noffset, conf_noffset,
key_offset, &err_msg);
key_blob, key_offset,
&err_msg);
if (ret) {
puts("- ");
} else {

12
boot/image-fit.c
View file

@ -1309,7 +1309,8 @@ static int fit_image_check_hash(const void *fit, int noffset, const void *data,
}
int fit_image_verify_with_data(const void *fit, int image_noffset,
const void *data, size_t size)
const void *key_blob, const void *data,
size_t size)
{
int noffset = 0;
char *err_msg = "";
@ -1319,7 +1320,7 @@ int fit_image_verify_with_data(const void *fit, int image_noffset,
/* Verify all required signatures */
if (FIT_IMAGE_ENABLE_VERIFY &&
fit_image_verify_required_sigs(fit, image_noffset, data, size,
gd_fdt_blob(), &verify_all)) {
key_blob, &verify_all)) {
err_msg = "Unable to verify required signature";
goto error;
}
@ -1342,8 +1343,8 @@ int fit_image_verify_with_data(const void *fit, int image_noffset,
} else if (FIT_IMAGE_ENABLE_VERIFY && verify_all &&
!strncmp(name, FIT_SIG_NODENAME,
strlen(FIT_SIG_NODENAME))) {
ret = fit_image_check_sig(fit, noffset, data,
size, -1, &err_msg);
ret = fit_image_check_sig(fit, noffset, data, size,
gd_fdt_blob(), -1, &err_msg);
/*
* Show an indication on failure, but do not return
@ -1406,7 +1407,8 @@ int fit_image_verify(const void *fit, int image_noffset)
goto err;
}
return fit_image_verify_with_data(fit, image_noffset, data, size);
return fit_image_verify_with_data(fit, image_noffset, gd_fdt_blob(),
data, size);
err:
printf("error!\n%s in '%s' image node\n", err_msg,

3
common/spl/spl_fit.c
View file

@ -321,7 +321,8 @@ static int spl_load_fit_image(struct spl_load_info *info, ulong sector,
if (CONFIG_IS_ENABLED(FIT_SIGNATURE)) {
printf("## Checking hash(es) for Image %s ... ",
fit_get_name(fit, node, NULL));
if (!fit_image_verify_with_data(fit, node, src, length))
if (!fit_image_verify_with_data(fit, node, gd_fdt_blob(), src,
length))
return -EPERM;
puts("OK\n");
}

23
include/image.h
View file

@ -1048,8 +1048,19 @@ int fit_add_verification_data(const char *keydir, const char *keyfile,
int require_keys, const char *engine_id,
const char *cmdname, const char *algo_name);
/**
* fit_image_verify_with_data() - Verify an image with given data
*
* @fit: Pointer to the FIT format image header
* @image_offset: Offset in @fit of image to verify
* @key_blob: FDT containing public keys
* @data: Image data to verify
* @size: Size of image data
*/
int fit_image_verify_with_data(const void *fit, int image_noffset,
const void *data, size_t size);
const void *key_blob, const void *data,
size_t size);
int fit_image_verify(const void *fit, int noffset);
int fit_config_verify(const void *fit, int conf_noffset);
int fit_all_image_verify(const void *fit);
@ -1297,7 +1308,7 @@ struct padding_algo *image_get_padding_algo(const char *name);
* @image_noffset: Offset of image node to check
* @data: Image data to check
* @size: Size of image data
* @sig_blob: FDT containing public keys
* @key_blob: FDT containing public keys
* @no_sigsp: Returns 1 if no signatures were required, and
* therefore nothing was checked. The caller may wish
* to fall back to other mechanisms, or refuse to
@ -1305,7 +1316,7 @@ struct padding_algo *image_get_padding_algo(const char *name);
* Return: 0 if all verified ok, <0 on error
*/
int fit_image_verify_required_sigs(const void *fit, int image_noffset,
const char *data, size_t size, const void *sig_blob,
const char *data, size_t size, const void *key_blob,
int *no_sigsp);
/**
@ -1315,7 +1326,8 @@ int fit_image_verify_required_sigs(const void *fit, int image_noffset,
* @noffset: Offset of signature node to check
* @data: Image data to check
* @size: Size of image data
* @required_keynode: Offset in the control FDT of the required key node,
* @keyblob: Key blob to check (typically the control FDT)
* @required_keynode: Offset in the keyblob of the required key node,
* if any. If this is given, then the image wil not
* pass verification unless that key is used. If this is
* -1 then any signature will do.
@ -1324,7 +1336,8 @@ int fit_image_verify_required_sigs(const void *fit, int image_noffset,
* Return: 0 if all verified ok, <0 on error
*/
int fit_image_check_sig(const void *fit, int noffset, const void *data,
size_t size, int required_keynode, char **err_msgp);
size_t size, const void *key_blob, int required_keynode,
char **err_msgp);
int fit_image_decrypt_data(const void *fit,
int image_noffset, int cipher_noffset,