]>
git.ipfire.org Git - people/ms/u-boot.git/blob - tools/image-host.c
2 * Copyright (c) 2013, Google Inc.
4 * (C) Copyright 2008 Semihalf
6 * (C) Copyright 2000-2006
7 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
9 * SPDX-License-Identifier: GPL-2.0+
18 * fit_set_hash_value - set hash value in requested has node
19 * @fit: pointer to the FIT format image header
20 * @noffset: hash node offset
21 * @value: hash value to be set
22 * @value_len: hash value length
24 * fit_set_hash_value() attempts to set hash value in a node at offset
25 * given and returns operation status to the caller.
31 static int fit_set_hash_value(void *fit
, int noffset
, uint8_t *value
,
36 ret
= fdt_setprop(fit
, noffset
, FIT_VALUE_PROP
, value
, value_len
);
38 printf("Can't set hash '%s' property for '%s' node(%s)\n",
39 FIT_VALUE_PROP
, fit_get_name(fit
, noffset
, NULL
),
41 return ret
== -FDT_ERR_NOSPACE
? -ENOSPC
: -EIO
;
48 * fit_image_process_hash - Process a single subnode of the images/ node
50 * Check each subnode and process accordingly. For hash nodes we generate
51 * a hash of the supplised data and store it in the node.
53 * @fit: pointer to the FIT format image header
54 * @image_name: name of image being processes (used to display errors)
55 * @noffset: subnode offset
56 * @data: data to process
57 * @size: size of data in bytes
58 * @return 0 if ok, -1 on error
60 static int fit_image_process_hash(void *fit
, const char *image_name
,
61 int noffset
, const void *data
, size_t size
)
63 uint8_t value
[FIT_MAX_HASH_LEN
];
64 const char *node_name
;
69 node_name
= fit_get_name(fit
, noffset
, NULL
);
71 if (fit_image_hash_get_algo(fit
, noffset
, &algo
)) {
72 printf("Can't get hash algo property for '%s' hash node in '%s' image node\n",
73 node_name
, image_name
);
77 if (calculate_hash(data
, size
, algo
, value
, &value_len
)) {
78 printf("Unsupported hash algorithm (%s) for '%s' hash node in '%s' image node\n",
79 algo
, node_name
, image_name
);
80 return -EPROTONOSUPPORT
;
83 ret
= fit_set_hash_value(fit
, noffset
, value
, value_len
);
85 printf("Can't set hash value for '%s' hash node in '%s' image node\n",
86 node_name
, image_name
);
94 * fit_image_write_sig() - write the signature to a FIT
96 * This writes the signature and signer data to the FIT.
98 * @fit: pointer to the FIT format image header
99 * @noffset: hash node offset
100 * @value: signature value to be set
101 * @value_len: signature value length
102 * @comment: Text comment to write (NULL for none)
106 * -FDT_ERR_..., on failure
108 static int fit_image_write_sig(void *fit
, int noffset
, uint8_t *value
,
109 int value_len
, const char *comment
, const char *region_prop
,
116 * Get the current string size, before we update the FIT and add
119 string_size
= fdt_size_dt_strings(fit
);
121 ret
= fdt_setprop(fit
, noffset
, FIT_VALUE_PROP
, value
, value_len
);
123 ret
= fdt_setprop_string(fit
, noffset
, "signer-name",
127 ret
= fdt_setprop_string(fit
, noffset
, "signer-version",
131 ret
= fdt_setprop_string(fit
, noffset
, "comment", comment
);
133 ret
= fit_set_timestamp(fit
, noffset
, time(NULL
));
134 if (region_prop
&& !ret
) {
137 ret
= fdt_setprop(fit
, noffset
, "hashed-nodes",
138 region_prop
, region_proplen
);
140 strdata
[1] = cpu_to_fdt32(string_size
);
142 ret
= fdt_setprop(fit
, noffset
, "hashed-strings",
143 strdata
, sizeof(strdata
));
150 static int fit_image_setup_sig(struct image_sign_info
*info
,
151 const char *keydir
, void *fit
, const char *image_name
,
152 int noffset
, const char *require_keys
)
154 const char *node_name
;
157 node_name
= fit_get_name(fit
, noffset
, NULL
);
158 if (fit_image_hash_get_algo(fit
, noffset
, &algo_name
)) {
159 printf("Can't get algo property for '%s' signature node in '%s' image node\n",
160 node_name
, image_name
);
164 memset(info
, '\0', sizeof(*info
));
165 info
->keydir
= keydir
;
166 info
->keyname
= fdt_getprop(fit
, noffset
, "key-name-hint", NULL
);
168 info
->node_offset
= noffset
;
169 info
->name
= algo_name
;
170 info
->checksum
= image_get_checksum_algo(algo_name
);
171 info
->crypto
= image_get_crypto_algo(algo_name
);
172 info
->require_keys
= require_keys
;
173 if (!info
->checksum
|| !info
->crypto
) {
174 printf("Unsupported signature algorithm (%s) for '%s' signature node in '%s' image node\n",
175 algo_name
, node_name
, image_name
);
183 * fit_image_process_sig- Process a single subnode of the images/ node
185 * Check each subnode and process accordingly. For signature nodes we
186 * generate a signed hash of the supplised data and store it in the node.
188 * @keydir: Directory containing keys to use for signing
189 * @keydest: Destination FDT blob to write public keys into
190 * @fit: pointer to the FIT format image header
191 * @image_name: name of image being processes (used to display errors)
192 * @noffset: subnode offset
193 * @data: data to process
194 * @size: size of data in bytes
195 * @comment: Comment to add to signature nodes
196 * @require_keys: Mark all keys as 'required'
197 * @return 0 if ok, -1 on error
199 static int fit_image_process_sig(const char *keydir
, void *keydest
,
200 void *fit
, const char *image_name
,
201 int noffset
, const void *data
, size_t size
,
202 const char *comment
, int require_keys
)
204 struct image_sign_info info
;
205 struct image_region region
;
206 const char *node_name
;
211 if (fit_image_setup_sig(&info
, keydir
, fit
, image_name
, noffset
,
212 require_keys
? "image" : NULL
))
215 node_name
= fit_get_name(fit
, noffset
, NULL
);
218 ret
= info
.crypto
->sign(&info
, ®ion
, 1, &value
, &value_len
);
220 printf("Failed to sign '%s' signature node in '%s' image node: %d\n",
221 node_name
, image_name
, ret
);
223 /* We allow keys to be missing */
229 ret
= fit_image_write_sig(fit
, noffset
, value
, value_len
, comment
,
232 if (ret
== -FDT_ERR_NOSPACE
)
234 printf("Can't write signature for '%s' signature node in '%s' conf node: %s\n",
235 node_name
, image_name
, fdt_strerror(ret
));
240 /* Get keyname again, as FDT has changed and invalidated our pointer */
241 info
.keyname
= fdt_getprop(fit
, noffset
, "key-name-hint", NULL
);
244 ret
= info
.crypto
->add_verify_data(&info
, keydest
);
249 * Write the public key into the supplied FDT file; this might fail
250 * several times, since we try signing with successively increasing
260 * fit_image_add_verification_data() - calculate/set verig. data for image node
262 * This adds hash and signature values for an component image node.
264 * All existing hash subnodes are checked, if algorithm property is set to
265 * one of the supported hash algorithms, hash value is computed and
266 * corresponding hash node property is set, for example:
268 * Input component image node structure:
270 * o image@1 (at image_noffset)
271 * | - data = [binary data]
275 * Output component image node structure:
277 * o image@1 (at image_noffset)
278 * | - data = [binary data]
281 * |- value = sha1(data)
283 * For signature details, please see doc/uImage.FIT/signature.txt
285 * @keydir Directory containing *.key and *.crt files (or NULL)
286 * @keydest FDT Blob to write public keys into (NULL if none)
287 * @fit: Pointer to the FIT format image header
288 * @image_noffset: Requested component image node
289 * @comment: Comment to add to signature nodes
290 * @require_keys: Mark all keys as 'required'
291 * @return: 0 on success, <0 on failure
293 int fit_image_add_verification_data(const char *keydir
, void *keydest
,
294 void *fit
, int image_noffset
, const char *comment
,
297 const char *image_name
;
302 /* Get image data and data length */
303 if (fit_image_get_data(fit
, image_noffset
, &data
, &size
)) {
304 printf("Can't get image data/size\n");
308 image_name
= fit_get_name(fit
, image_noffset
, NULL
);
310 /* Process all hash subnodes of the component image node */
311 for (noffset
= fdt_first_subnode(fit
, image_noffset
);
313 noffset
= fdt_next_subnode(fit
, noffset
)) {
314 const char *node_name
;
318 * Check subnode name, must be equal to "hash" or "signature".
319 * Multiple hash nodes require unique unit node
320 * names, e.g. hash@1, hash@2, signature@1, etc.
322 node_name
= fit_get_name(fit
, noffset
, NULL
);
323 if (!strncmp(node_name
, FIT_HASH_NODENAME
,
324 strlen(FIT_HASH_NODENAME
))) {
325 ret
= fit_image_process_hash(fit
, image_name
, noffset
,
327 } else if (IMAGE_ENABLE_SIGN
&& keydir
&&
328 !strncmp(node_name
, FIT_SIG_NODENAME
,
329 strlen(FIT_SIG_NODENAME
))) {
330 ret
= fit_image_process_sig(keydir
, keydest
,
331 fit
, image_name
, noffset
, data
, size
,
332 comment
, require_keys
);
346 static void strlist_init(struct strlist
*list
)
348 memset(list
, '\0', sizeof(*list
));
351 static void strlist_free(struct strlist
*list
)
355 for (i
= 0; i
< list
->count
; i
++)
356 free(list
->strings
[i
]);
360 static int strlist_add(struct strlist
*list
, const char *str
)
365 list
->strings
= realloc(list
->strings
,
366 (list
->count
+ 1) * sizeof(char *));
369 list
->strings
[list
->count
++] = dup
;
374 static const char *fit_config_get_image_list(void *fit
, int noffset
,
375 int *lenp
, int *allow_missingp
)
377 static const char default_list
[] = FIT_KERNEL_PROP
"\0"
381 /* If there is an "image" property, use that */
382 prop
= fdt_getprop(fit
, noffset
, "sign-images", lenp
);
385 return *lenp
? prop
: NULL
;
388 /* Default image list */
390 *lenp
= sizeof(default_list
);
395 static int fit_config_get_hash_list(void *fit
, int conf_noffset
,
396 int sig_offset
, struct strlist
*node_inc
)
399 const char *prop
, *iname
, *end
;
400 const char *conf_name
, *sig_name
;
401 char name
[200], path
[200];
405 conf_name
= fit_get_name(fit
, conf_noffset
, NULL
);
406 sig_name
= fit_get_name(fit
, sig_offset
, NULL
);
409 * Build a list of nodes we need to hash. We always need the root
410 * node and the configuration.
412 strlist_init(node_inc
);
413 snprintf(name
, sizeof(name
), "%s/%s", FIT_CONFS_PATH
, conf_name
);
414 if (strlist_add(node_inc
, "/") ||
415 strlist_add(node_inc
, name
))
418 /* Get a list of images that we intend to sign */
419 prop
= fit_config_get_image_list(fit
, sig_offset
, &len
,
424 /* Locate the images */
427 for (iname
= prop
; iname
< end
; iname
+= strlen(iname
) + 1) {
432 image_noffset
= fit_conf_get_prop_node(fit
, conf_noffset
,
434 if (image_noffset
< 0) {
435 printf("Failed to find image '%s' in configuration '%s/%s'\n",
436 iname
, conf_name
, sig_name
);
443 ret
= fdt_get_path(fit
, image_noffset
, path
, sizeof(path
));
446 if (strlist_add(node_inc
, path
))
449 snprintf(name
, sizeof(name
), "%s/%s", FIT_CONFS_PATH
,
452 /* Add all this image's hashes */
454 for (noffset
= fdt_first_subnode(fit
, image_noffset
);
456 noffset
= fdt_next_subnode(fit
, noffset
)) {
457 const char *name
= fit_get_name(fit
, noffset
, NULL
);
459 if (strncmp(name
, FIT_HASH_NODENAME
,
460 strlen(FIT_HASH_NODENAME
)))
462 ret
= fdt_get_path(fit
, noffset
, path
, sizeof(path
));
465 if (strlist_add(node_inc
, path
))
471 printf("Failed to find any hash nodes in configuration '%s/%s' image '%s' - without these it is not possible to verify this image\n",
472 conf_name
, sig_name
, iname
);
480 printf("Failed to find any images for configuration '%s/%s'\n",
481 conf_name
, sig_name
);
488 printf("Out of memory processing configuration '%s/%s'\n", conf_name
,
493 printf("Failed to get path for image '%s' in configuration '%s/%s': %s\n",
494 iname
, conf_name
, sig_name
, fdt_strerror(ret
));
498 static int fit_config_get_data(void *fit
, int conf_noffset
, int noffset
,
499 struct image_region
**regionp
, int *region_countp
,
500 char **region_propp
, int *region_proplen
)
502 char * const exc_prop
[] = {"data"};
503 struct strlist node_inc
;
504 struct image_region
*region
;
505 struct fdt_region fdt_regions
[100];
506 const char *conf_name
, *sig_name
;
512 conf_name
= fit_get_name(fit
, conf_noffset
, NULL
);
513 sig_name
= fit_get_name(fit
, conf_noffset
, NULL
);
514 debug("%s: conf='%s', sig='%s'\n", __func__
, conf_name
, sig_name
);
516 /* Get a list of nodes we want to hash */
517 ret
= fit_config_get_hash_list(fit
, conf_noffset
, noffset
, &node_inc
);
521 /* Get a list of regions to hash */
522 count
= fdt_find_regions(fit
, node_inc
.strings
, node_inc
.count
,
523 exc_prop
, ARRAY_SIZE(exc_prop
),
524 fdt_regions
, ARRAY_SIZE(fdt_regions
),
525 path
, sizeof(path
), 1);
527 printf("Failed to hash configuration '%s/%s': %s\n", conf_name
,
528 sig_name
, fdt_strerror(ret
));
532 printf("No data to hash for configuration '%s/%s': %s\n",
533 conf_name
, sig_name
, fdt_strerror(ret
));
537 /* Build our list of data blocks */
538 region
= fit_region_make_list(fit
, fdt_regions
, count
, NULL
);
540 printf("Out of memory hashing configuration '%s/%s'\n",
541 conf_name
, sig_name
);
545 /* Create a list of all hashed properties */
546 debug("Hash nodes:\n");
547 for (i
= len
= 0; i
< node_inc
.count
; i
++) {
548 debug(" %s\n", node_inc
.strings
[i
]);
549 len
+= strlen(node_inc
.strings
[i
]) + 1;
551 region_prop
= malloc(len
);
553 printf("Out of memory setting up regions for configuration '%s/%s'\n",
554 conf_name
, sig_name
);
557 for (i
= len
= 0; i
< node_inc
.count
;
558 len
+= strlen(node_inc
.strings
[i
]) + 1, i
++)
559 strcpy(region_prop
+ len
, node_inc
.strings
[i
]);
560 strlist_free(&node_inc
);
562 *region_countp
= count
;
564 *region_propp
= region_prop
;
565 *region_proplen
= len
;
570 static int fit_config_process_sig(const char *keydir
, void *keydest
,
571 void *fit
, const char *conf_name
, int conf_noffset
,
572 int noffset
, const char *comment
, int require_keys
)
574 struct image_sign_info info
;
575 const char *node_name
;
576 struct image_region
*region
;
584 node_name
= fit_get_name(fit
, noffset
, NULL
);
585 if (fit_config_get_data(fit
, conf_noffset
, noffset
, ®ion
,
586 ®ion_count
, ®ion_prop
, ®ion_proplen
))
589 if (fit_image_setup_sig(&info
, keydir
, fit
, conf_name
, noffset
,
590 require_keys
? "conf" : NULL
))
593 ret
= info
.crypto
->sign(&info
, region
, region_count
, &value
,
597 printf("Failed to sign '%s' signature node in '%s' conf node\n",
598 node_name
, conf_name
);
600 /* We allow keys to be missing */
606 ret
= fit_image_write_sig(fit
, noffset
, value
, value_len
, comment
,
607 region_prop
, region_proplen
);
609 if (ret
== -FDT_ERR_NOSPACE
)
611 printf("Can't write signature for '%s' signature node in '%s' conf node: %s\n",
612 node_name
, conf_name
, fdt_strerror(ret
));
618 /* Get keyname again, as FDT has changed and invalidated our pointer */
619 info
.keyname
= fdt_getprop(fit
, noffset
, "key-name-hint", NULL
);
621 /* Write the public key into the supplied FDT file */
623 ret
= info
.crypto
->add_verify_data(&info
, keydest
);
627 printf("Failed to add verification data for '%s' signature node in '%s' image node\n",
628 node_name
, conf_name
);
636 static int fit_config_add_verification_data(const char *keydir
, void *keydest
,
637 void *fit
, int conf_noffset
, const char *comment
,
640 const char *conf_name
;
643 conf_name
= fit_get_name(fit
, conf_noffset
, NULL
);
645 /* Process all hash subnodes of the configuration node */
646 for (noffset
= fdt_first_subnode(fit
, conf_noffset
);
648 noffset
= fdt_next_subnode(fit
, noffset
)) {
649 const char *node_name
;
652 node_name
= fit_get_name(fit
, noffset
, NULL
);
653 if (!strncmp(node_name
, FIT_SIG_NODENAME
,
654 strlen(FIT_SIG_NODENAME
))) {
655 ret
= fit_config_process_sig(keydir
, keydest
,
656 fit
, conf_name
, conf_noffset
, noffset
, comment
,
666 int fit_add_verification_data(const char *keydir
, void *keydest
, void *fit
,
667 const char *comment
, int require_keys
)
669 int images_noffset
, confs_noffset
;
673 /* Find images parent node offset */
674 images_noffset
= fdt_path_offset(fit
, FIT_IMAGES_PATH
);
675 if (images_noffset
< 0) {
676 printf("Can't find images parent node '%s' (%s)\n",
677 FIT_IMAGES_PATH
, fdt_strerror(images_noffset
));
678 return images_noffset
;
681 /* Process its subnodes, print out component images details */
682 for (noffset
= fdt_first_subnode(fit
, images_noffset
);
684 noffset
= fdt_next_subnode(fit
, noffset
)) {
686 * Direct child node of the images parent node,
687 * i.e. component image node.
689 ret
= fit_image_add_verification_data(keydir
, keydest
,
690 fit
, noffset
, comment
, require_keys
);
695 /* If there are no keys, we can't sign configurations */
696 if (!IMAGE_ENABLE_SIGN
|| !keydir
)
699 /* Find configurations parent node offset */
700 confs_noffset
= fdt_path_offset(fit
, FIT_CONFS_PATH
);
701 if (confs_noffset
< 0) {
702 printf("Can't find images parent node '%s' (%s)\n",
703 FIT_CONFS_PATH
, fdt_strerror(confs_noffset
));
707 /* Process its subnodes, print out component images details */
708 for (noffset
= fdt_first_subnode(fit
, confs_noffset
);
710 noffset
= fdt_next_subnode(fit
, noffset
)) {
711 ret
= fit_config_add_verification_data(keydir
, keydest
,
712 fit
, noffset
, comment
,
721 #ifdef CONFIG_FIT_SIGNATURE
722 int fit_check_sign(const void *fit
, const void *key
)
727 cfg_noffset
= fit_conf_get_node(fit
, NULL
);
731 printf("Verifying Hash Integrity ... ");
732 ret
= fit_config_verify(fit
, cfg_noffset
);
735 ret
= bootm_host_load_images(fit
, cfg_noffset
);