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1 | /* | |
2 | * Copyright (c) 2013, Google Inc. | |
3 | * | |
4 | * (C) Copyright 2008 Semihalf | |
5 | * | |
6 | * (C) Copyright 2000-2006 | |
7 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
8 | * | |
9 | * SPDX-License-Identifier: GPL-2.0+ | |
10 | */ | |
11 | ||
12 | #include "mkimage.h" | |
13 | #include <bootm.h> | |
14 | #include <image.h> | |
15 | #include <version.h> | |
16 | ||
17 | /** | |
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 | |
23 | * | |
24 | * fit_set_hash_value() attempts to set hash value in a node at offset | |
25 | * given and returns operation status to the caller. | |
26 | * | |
27 | * returns | |
28 | * 0, on success | |
29 | * -1, on failure | |
30 | */ | |
31 | static int fit_set_hash_value(void *fit, int noffset, uint8_t *value, | |
32 | int value_len) | |
33 | { | |
34 | int ret; | |
35 | ||
36 | ret = fdt_setprop(fit, noffset, FIT_VALUE_PROP, value, value_len); | |
37 | if (ret) { | |
38 | printf("Can't set hash '%s' property for '%s' node(%s)\n", | |
39 | FIT_VALUE_PROP, fit_get_name(fit, noffset, NULL), | |
40 | fdt_strerror(ret)); | |
41 | return ret == -FDT_ERR_NOSPACE ? -ENOSPC : -EIO; | |
42 | } | |
43 | ||
44 | return 0; | |
45 | } | |
46 | ||
47 | /** | |
48 | * fit_image_process_hash - Process a single subnode of the images/ node | |
49 | * | |
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. | |
52 | * | |
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 | |
59 | */ | |
60 | static int fit_image_process_hash(void *fit, const char *image_name, | |
61 | int noffset, const void *data, size_t size) | |
62 | { | |
63 | uint8_t value[FIT_MAX_HASH_LEN]; | |
64 | const char *node_name; | |
65 | int value_len; | |
66 | char *algo; | |
67 | int ret; | |
68 | ||
69 | node_name = fit_get_name(fit, noffset, NULL); | |
70 | ||
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); | |
74 | return -ENOENT; | |
75 | } | |
76 | ||
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; | |
81 | } | |
82 | ||
83 | ret = fit_set_hash_value(fit, noffset, value, value_len); | |
84 | if (ret) { | |
85 | printf("Can't set hash value for '%s' hash node in '%s' image node\n", | |
86 | node_name, image_name); | |
87 | return ret; | |
88 | } | |
89 | ||
90 | return 0; | |
91 | } | |
92 | ||
93 | /** | |
94 | * fit_image_write_sig() - write the signature to a FIT | |
95 | * | |
96 | * This writes the signature and signer data to the FIT. | |
97 | * | |
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) | |
103 | * | |
104 | * returns | |
105 | * 0, on success | |
106 | * -FDT_ERR_..., on failure | |
107 | */ | |
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, | |
110 | int region_proplen) | |
111 | { | |
112 | int string_size; | |
113 | int ret; | |
114 | ||
115 | /* | |
116 | * Get the current string size, before we update the FIT and add | |
117 | * more | |
118 | */ | |
119 | string_size = fdt_size_dt_strings(fit); | |
120 | ||
121 | ret = fdt_setprop(fit, noffset, FIT_VALUE_PROP, value, value_len); | |
122 | if (!ret) { | |
123 | ret = fdt_setprop_string(fit, noffset, "signer-name", | |
124 | "mkimage"); | |
125 | } | |
126 | if (!ret) { | |
127 | ret = fdt_setprop_string(fit, noffset, "signer-version", | |
128 | PLAIN_VERSION); | |
129 | } | |
130 | if (comment && !ret) | |
131 | ret = fdt_setprop_string(fit, noffset, "comment", comment); | |
132 | if (!ret) | |
133 | ret = fit_set_timestamp(fit, noffset, time(NULL)); | |
134 | if (region_prop && !ret) { | |
135 | uint32_t strdata[2]; | |
136 | ||
137 | ret = fdt_setprop(fit, noffset, "hashed-nodes", | |
138 | region_prop, region_proplen); | |
139 | strdata[0] = 0; | |
140 | strdata[1] = cpu_to_fdt32(string_size); | |
141 | if (!ret) { | |
142 | ret = fdt_setprop(fit, noffset, "hashed-strings", | |
143 | strdata, sizeof(strdata)); | |
144 | } | |
145 | } | |
146 | ||
147 | return ret; | |
148 | } | |
149 | ||
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, const char *engine_id) | |
153 | { | |
154 | const char *node_name; | |
155 | char *algo_name; | |
156 | ||
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); | |
161 | return -1; | |
162 | } | |
163 | ||
164 | memset(info, '\0', sizeof(*info)); | |
165 | info->keydir = keydir; | |
166 | info->keyname = fdt_getprop(fit, noffset, "key-name-hint", NULL); | |
167 | info->fit = fit; | |
168 | info->node_offset = noffset; | |
169 | info->name = strdup(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 | info->engine_id = engine_id; | |
174 | if (!info->checksum || !info->crypto) { | |
175 | printf("Unsupported signature algorithm (%s) for '%s' signature node in '%s' image node\n", | |
176 | algo_name, node_name, image_name); | |
177 | return -1; | |
178 | } | |
179 | ||
180 | return 0; | |
181 | } | |
182 | ||
183 | /** | |
184 | * fit_image_process_sig- Process a single subnode of the images/ node | |
185 | * | |
186 | * Check each subnode and process accordingly. For signature nodes we | |
187 | * generate a signed hash of the supplised data and store it in the node. | |
188 | * | |
189 | * @keydir: Directory containing keys to use for signing | |
190 | * @keydest: Destination FDT blob to write public keys into | |
191 | * @fit: pointer to the FIT format image header | |
192 | * @image_name: name of image being processes (used to display errors) | |
193 | * @noffset: subnode offset | |
194 | * @data: data to process | |
195 | * @size: size of data in bytes | |
196 | * @comment: Comment to add to signature nodes | |
197 | * @require_keys: Mark all keys as 'required' | |
198 | * @engine_id: Engine to use for signing | |
199 | * @return 0 if ok, -1 on error | |
200 | */ | |
201 | static int fit_image_process_sig(const char *keydir, void *keydest, | |
202 | void *fit, const char *image_name, | |
203 | int noffset, const void *data, size_t size, | |
204 | const char *comment, int require_keys, const char *engine_id) | |
205 | { | |
206 | struct image_sign_info info; | |
207 | struct image_region region; | |
208 | const char *node_name; | |
209 | uint8_t *value; | |
210 | uint value_len; | |
211 | int ret; | |
212 | ||
213 | if (fit_image_setup_sig(&info, keydir, fit, image_name, noffset, | |
214 | require_keys ? "image" : NULL, engine_id)) | |
215 | return -1; | |
216 | ||
217 | node_name = fit_get_name(fit, noffset, NULL); | |
218 | region.data = data; | |
219 | region.size = size; | |
220 | ret = info.crypto->sign(&info, ®ion, 1, &value, &value_len); | |
221 | if (ret) { | |
222 | printf("Failed to sign '%s' signature node in '%s' image node: %d\n", | |
223 | node_name, image_name, ret); | |
224 | ||
225 | /* We allow keys to be missing */ | |
226 | if (ret == -ENOENT) | |
227 | return 0; | |
228 | return -1; | |
229 | } | |
230 | ||
231 | ret = fit_image_write_sig(fit, noffset, value, value_len, comment, | |
232 | NULL, 0); | |
233 | if (ret) { | |
234 | if (ret == -FDT_ERR_NOSPACE) | |
235 | return -ENOSPC; | |
236 | printf("Can't write signature for '%s' signature node in '%s' conf node: %s\n", | |
237 | node_name, image_name, fdt_strerror(ret)); | |
238 | return -1; | |
239 | } | |
240 | free(value); | |
241 | ||
242 | /* Get keyname again, as FDT has changed and invalidated our pointer */ | |
243 | info.keyname = fdt_getprop(fit, noffset, "key-name-hint", NULL); | |
244 | ||
245 | /* | |
246 | * Write the public key into the supplied FDT file; this might fail | |
247 | * several times, since we try signing with successively increasing | |
248 | * size values | |
249 | */ | |
250 | if (keydest) { | |
251 | ret = info.crypto->add_verify_data(&info, keydest); | |
252 | if (ret) { | |
253 | printf("Failed to add verification data for '%s' signature node in '%s' image node\n", | |
254 | node_name, image_name); | |
255 | return ret; | |
256 | } | |
257 | } | |
258 | ||
259 | return 0; | |
260 | } | |
261 | ||
262 | /** | |
263 | * fit_image_add_verification_data() - calculate/set verig. data for image node | |
264 | * | |
265 | * This adds hash and signature values for an component image node. | |
266 | * | |
267 | * All existing hash subnodes are checked, if algorithm property is set to | |
268 | * one of the supported hash algorithms, hash value is computed and | |
269 | * corresponding hash node property is set, for example: | |
270 | * | |
271 | * Input component image node structure: | |
272 | * | |
273 | * o image@1 (at image_noffset) | |
274 | * | - data = [binary data] | |
275 | * o hash@1 | |
276 | * |- algo = "sha1" | |
277 | * | |
278 | * Output component image node structure: | |
279 | * | |
280 | * o image@1 (at image_noffset) | |
281 | * | - data = [binary data] | |
282 | * o hash@1 | |
283 | * |- algo = "sha1" | |
284 | * |- value = sha1(data) | |
285 | * | |
286 | * For signature details, please see doc/uImage.FIT/signature.txt | |
287 | * | |
288 | * @keydir Directory containing *.key and *.crt files (or NULL) | |
289 | * @keydest FDT Blob to write public keys into (NULL if none) | |
290 | * @fit: Pointer to the FIT format image header | |
291 | * @image_noffset: Requested component image node | |
292 | * @comment: Comment to add to signature nodes | |
293 | * @require_keys: Mark all keys as 'required' | |
294 | * @engine_id: Engine to use for signing | |
295 | * @return: 0 on success, <0 on failure | |
296 | */ | |
297 | int fit_image_add_verification_data(const char *keydir, void *keydest, | |
298 | void *fit, int image_noffset, const char *comment, | |
299 | int require_keys, const char *engine_id) | |
300 | { | |
301 | const char *image_name; | |
302 | const void *data; | |
303 | size_t size; | |
304 | int noffset; | |
305 | ||
306 | /* Get image data and data length */ | |
307 | if (fit_image_get_data(fit, image_noffset, &data, &size)) { | |
308 | printf("Can't get image data/size\n"); | |
309 | return -1; | |
310 | } | |
311 | ||
312 | image_name = fit_get_name(fit, image_noffset, NULL); | |
313 | ||
314 | /* Process all hash subnodes of the component image node */ | |
315 | for (noffset = fdt_first_subnode(fit, image_noffset); | |
316 | noffset >= 0; | |
317 | noffset = fdt_next_subnode(fit, noffset)) { | |
318 | const char *node_name; | |
319 | int ret = 0; | |
320 | ||
321 | /* | |
322 | * Check subnode name, must be equal to "hash" or "signature". | |
323 | * Multiple hash nodes require unique unit node | |
324 | * names, e.g. hash@1, hash@2, signature@1, etc. | |
325 | */ | |
326 | node_name = fit_get_name(fit, noffset, NULL); | |
327 | if (!strncmp(node_name, FIT_HASH_NODENAME, | |
328 | strlen(FIT_HASH_NODENAME))) { | |
329 | ret = fit_image_process_hash(fit, image_name, noffset, | |
330 | data, size); | |
331 | } else if (IMAGE_ENABLE_SIGN && keydir && | |
332 | !strncmp(node_name, FIT_SIG_NODENAME, | |
333 | strlen(FIT_SIG_NODENAME))) { | |
334 | ret = fit_image_process_sig(keydir, keydest, | |
335 | fit, image_name, noffset, data, size, | |
336 | comment, require_keys, engine_id); | |
337 | } | |
338 | if (ret) | |
339 | return ret; | |
340 | } | |
341 | ||
342 | return 0; | |
343 | } | |
344 | ||
345 | struct strlist { | |
346 | int count; | |
347 | char **strings; | |
348 | }; | |
349 | ||
350 | static void strlist_init(struct strlist *list) | |
351 | { | |
352 | memset(list, '\0', sizeof(*list)); | |
353 | } | |
354 | ||
355 | static void strlist_free(struct strlist *list) | |
356 | { | |
357 | int i; | |
358 | ||
359 | for (i = 0; i < list->count; i++) | |
360 | free(list->strings[i]); | |
361 | free(list->strings); | |
362 | } | |
363 | ||
364 | static int strlist_add(struct strlist *list, const char *str) | |
365 | { | |
366 | char *dup; | |
367 | ||
368 | dup = strdup(str); | |
369 | list->strings = realloc(list->strings, | |
370 | (list->count + 1) * sizeof(char *)); | |
371 | if (!list || !str) | |
372 | return -1; | |
373 | list->strings[list->count++] = dup; | |
374 | ||
375 | return 0; | |
376 | } | |
377 | ||
378 | static const char *fit_config_get_image_list(void *fit, int noffset, | |
379 | int *lenp, int *allow_missingp) | |
380 | { | |
381 | static const char default_list[] = FIT_KERNEL_PROP "\0" | |
382 | FIT_FDT_PROP; | |
383 | const char *prop; | |
384 | ||
385 | /* If there is an "image" property, use that */ | |
386 | prop = fdt_getprop(fit, noffset, "sign-images", lenp); | |
387 | if (prop) { | |
388 | *allow_missingp = 0; | |
389 | return *lenp ? prop : NULL; | |
390 | } | |
391 | ||
392 | /* Default image list */ | |
393 | *allow_missingp = 1; | |
394 | *lenp = sizeof(default_list); | |
395 | ||
396 | return default_list; | |
397 | } | |
398 | ||
399 | static int fit_config_get_hash_list(void *fit, int conf_noffset, | |
400 | int sig_offset, struct strlist *node_inc) | |
401 | { | |
402 | int allow_missing; | |
403 | const char *prop, *iname, *end; | |
404 | const char *conf_name, *sig_name; | |
405 | char name[200], path[200]; | |
406 | int image_count; | |
407 | int ret, len; | |
408 | ||
409 | conf_name = fit_get_name(fit, conf_noffset, NULL); | |
410 | sig_name = fit_get_name(fit, sig_offset, NULL); | |
411 | ||
412 | /* | |
413 | * Build a list of nodes we need to hash. We always need the root | |
414 | * node and the configuration. | |
415 | */ | |
416 | strlist_init(node_inc); | |
417 | snprintf(name, sizeof(name), "%s/%s", FIT_CONFS_PATH, conf_name); | |
418 | if (strlist_add(node_inc, "/") || | |
419 | strlist_add(node_inc, name)) | |
420 | goto err_mem; | |
421 | ||
422 | /* Get a list of images that we intend to sign */ | |
423 | prop = fit_config_get_image_list(fit, sig_offset, &len, | |
424 | &allow_missing); | |
425 | if (!prop) | |
426 | return 0; | |
427 | ||
428 | /* Locate the images */ | |
429 | end = prop + len; | |
430 | image_count = 0; | |
431 | for (iname = prop; iname < end; iname += strlen(iname) + 1) { | |
432 | int noffset; | |
433 | int image_noffset; | |
434 | int hash_count; | |
435 | ||
436 | image_noffset = fit_conf_get_prop_node(fit, conf_noffset, | |
437 | iname); | |
438 | if (image_noffset < 0) { | |
439 | printf("Failed to find image '%s' in configuration '%s/%s'\n", | |
440 | iname, conf_name, sig_name); | |
441 | if (allow_missing) | |
442 | continue; | |
443 | ||
444 | return -ENOENT; | |
445 | } | |
446 | ||
447 | ret = fdt_get_path(fit, image_noffset, path, sizeof(path)); | |
448 | if (ret < 0) | |
449 | goto err_path; | |
450 | if (strlist_add(node_inc, path)) | |
451 | goto err_mem; | |
452 | ||
453 | snprintf(name, sizeof(name), "%s/%s", FIT_CONFS_PATH, | |
454 | conf_name); | |
455 | ||
456 | /* Add all this image's hashes */ | |
457 | hash_count = 0; | |
458 | for (noffset = fdt_first_subnode(fit, image_noffset); | |
459 | noffset >= 0; | |
460 | noffset = fdt_next_subnode(fit, noffset)) { | |
461 | const char *name = fit_get_name(fit, noffset, NULL); | |
462 | ||
463 | if (strncmp(name, FIT_HASH_NODENAME, | |
464 | strlen(FIT_HASH_NODENAME))) | |
465 | continue; | |
466 | ret = fdt_get_path(fit, noffset, path, sizeof(path)); | |
467 | if (ret < 0) | |
468 | goto err_path; | |
469 | if (strlist_add(node_inc, path)) | |
470 | goto err_mem; | |
471 | hash_count++; | |
472 | } | |
473 | ||
474 | if (!hash_count) { | |
475 | printf("Failed to find any hash nodes in configuration '%s/%s' image '%s' - without these it is not possible to verify this image\n", | |
476 | conf_name, sig_name, iname); | |
477 | return -ENOMSG; | |
478 | } | |
479 | ||
480 | image_count++; | |
481 | } | |
482 | ||
483 | if (!image_count) { | |
484 | printf("Failed to find any images for configuration '%s/%s'\n", | |
485 | conf_name, sig_name); | |
486 | return -ENOMSG; | |
487 | } | |
488 | ||
489 | return 0; | |
490 | ||
491 | err_mem: | |
492 | printf("Out of memory processing configuration '%s/%s'\n", conf_name, | |
493 | sig_name); | |
494 | return -ENOMEM; | |
495 | ||
496 | err_path: | |
497 | printf("Failed to get path for image '%s' in configuration '%s/%s': %s\n", | |
498 | iname, conf_name, sig_name, fdt_strerror(ret)); | |
499 | return -ENOENT; | |
500 | } | |
501 | ||
502 | static int fit_config_get_data(void *fit, int conf_noffset, int noffset, | |
503 | struct image_region **regionp, int *region_countp, | |
504 | char **region_propp, int *region_proplen) | |
505 | { | |
506 | char * const exc_prop[] = {"data"}; | |
507 | struct strlist node_inc; | |
508 | struct image_region *region; | |
509 | struct fdt_region fdt_regions[100]; | |
510 | const char *conf_name, *sig_name; | |
511 | char path[200]; | |
512 | int count, i; | |
513 | char *region_prop; | |
514 | int ret, len; | |
515 | ||
516 | conf_name = fit_get_name(fit, conf_noffset, NULL); | |
517 | sig_name = fit_get_name(fit, noffset, NULL); | |
518 | debug("%s: conf='%s', sig='%s'\n", __func__, conf_name, sig_name); | |
519 | ||
520 | /* Get a list of nodes we want to hash */ | |
521 | ret = fit_config_get_hash_list(fit, conf_noffset, noffset, &node_inc); | |
522 | if (ret) | |
523 | return ret; | |
524 | ||
525 | /* Get a list of regions to hash */ | |
526 | count = fdt_find_regions(fit, node_inc.strings, node_inc.count, | |
527 | exc_prop, ARRAY_SIZE(exc_prop), | |
528 | fdt_regions, ARRAY_SIZE(fdt_regions), | |
529 | path, sizeof(path), 1); | |
530 | if (count < 0) { | |
531 | printf("Failed to hash configuration '%s/%s': %s\n", conf_name, | |
532 | sig_name, fdt_strerror(ret)); | |
533 | return -EIO; | |
534 | } | |
535 | if (count == 0) { | |
536 | printf("No data to hash for configuration '%s/%s': %s\n", | |
537 | conf_name, sig_name, fdt_strerror(ret)); | |
538 | return -EINVAL; | |
539 | } | |
540 | ||
541 | /* Build our list of data blocks */ | |
542 | region = fit_region_make_list(fit, fdt_regions, count, NULL); | |
543 | if (!region) { | |
544 | printf("Out of memory hashing configuration '%s/%s'\n", | |
545 | conf_name, sig_name); | |
546 | return -ENOMEM; | |
547 | } | |
548 | ||
549 | /* Create a list of all hashed properties */ | |
550 | debug("Hash nodes:\n"); | |
551 | for (i = len = 0; i < node_inc.count; i++) { | |
552 | debug(" %s\n", node_inc.strings[i]); | |
553 | len += strlen(node_inc.strings[i]) + 1; | |
554 | } | |
555 | region_prop = malloc(len); | |
556 | if (!region_prop) { | |
557 | printf("Out of memory setting up regions for configuration '%s/%s'\n", | |
558 | conf_name, sig_name); | |
559 | return -ENOMEM; | |
560 | } | |
561 | for (i = len = 0; i < node_inc.count; | |
562 | len += strlen(node_inc.strings[i]) + 1, i++) | |
563 | strcpy(region_prop + len, node_inc.strings[i]); | |
564 | strlist_free(&node_inc); | |
565 | ||
566 | *region_countp = count; | |
567 | *regionp = region; | |
568 | *region_propp = region_prop; | |
569 | *region_proplen = len; | |
570 | ||
571 | return 0; | |
572 | } | |
573 | ||
574 | static int fit_config_process_sig(const char *keydir, void *keydest, | |
575 | void *fit, const char *conf_name, int conf_noffset, | |
576 | int noffset, const char *comment, int require_keys, | |
577 | const char *engine_id) | |
578 | { | |
579 | struct image_sign_info info; | |
580 | const char *node_name; | |
581 | struct image_region *region; | |
582 | char *region_prop; | |
583 | int region_proplen; | |
584 | int region_count; | |
585 | uint8_t *value; | |
586 | uint value_len; | |
587 | int ret; | |
588 | ||
589 | node_name = fit_get_name(fit, noffset, NULL); | |
590 | if (fit_config_get_data(fit, conf_noffset, noffset, ®ion, | |
591 | ®ion_count, ®ion_prop, ®ion_proplen)) | |
592 | return -1; | |
593 | ||
594 | if (fit_image_setup_sig(&info, keydir, fit, conf_name, noffset, | |
595 | require_keys ? "conf" : NULL, engine_id)) | |
596 | return -1; | |
597 | ||
598 | ret = info.crypto->sign(&info, region, region_count, &value, | |
599 | &value_len); | |
600 | free(region); | |
601 | if (ret) { | |
602 | printf("Failed to sign '%s' signature node in '%s' conf node\n", | |
603 | node_name, conf_name); | |
604 | ||
605 | /* We allow keys to be missing */ | |
606 | if (ret == -ENOENT) | |
607 | return 0; | |
608 | return -1; | |
609 | } | |
610 | ||
611 | ret = fit_image_write_sig(fit, noffset, value, value_len, comment, | |
612 | region_prop, region_proplen); | |
613 | if (ret) { | |
614 | if (ret == -FDT_ERR_NOSPACE) | |
615 | return -ENOSPC; | |
616 | printf("Can't write signature for '%s' signature node in '%s' conf node: %s\n", | |
617 | node_name, conf_name, fdt_strerror(ret)); | |
618 | return -1; | |
619 | } | |
620 | free(value); | |
621 | free(region_prop); | |
622 | ||
623 | /* Get keyname again, as FDT has changed and invalidated our pointer */ | |
624 | info.keyname = fdt_getprop(fit, noffset, "key-name-hint", NULL); | |
625 | ||
626 | /* Write the public key into the supplied FDT file */ | |
627 | if (keydest) { | |
628 | ret = info.crypto->add_verify_data(&info, keydest); | |
629 | if (ret) { | |
630 | printf("Failed to add verification data for '%s' signature node in '%s' configuration node\n", | |
631 | node_name, conf_name); | |
632 | } | |
633 | return ret; | |
634 | } | |
635 | ||
636 | return 0; | |
637 | } | |
638 | ||
639 | static int fit_config_add_verification_data(const char *keydir, void *keydest, | |
640 | void *fit, int conf_noffset, const char *comment, | |
641 | int require_keys, const char *engine_id) | |
642 | { | |
643 | const char *conf_name; | |
644 | int noffset; | |
645 | ||
646 | conf_name = fit_get_name(fit, conf_noffset, NULL); | |
647 | ||
648 | /* Process all hash subnodes of the configuration node */ | |
649 | for (noffset = fdt_first_subnode(fit, conf_noffset); | |
650 | noffset >= 0; | |
651 | noffset = fdt_next_subnode(fit, noffset)) { | |
652 | const char *node_name; | |
653 | int ret = 0; | |
654 | ||
655 | node_name = fit_get_name(fit, noffset, NULL); | |
656 | if (!strncmp(node_name, FIT_SIG_NODENAME, | |
657 | strlen(FIT_SIG_NODENAME))) { | |
658 | ret = fit_config_process_sig(keydir, keydest, | |
659 | fit, conf_name, conf_noffset, noffset, comment, | |
660 | require_keys, engine_id); | |
661 | } | |
662 | if (ret) | |
663 | return ret; | |
664 | } | |
665 | ||
666 | return 0; | |
667 | } | |
668 | ||
669 | int fit_add_verification_data(const char *keydir, void *keydest, void *fit, | |
670 | const char *comment, int require_keys, | |
671 | const char *engine_id) | |
672 | { | |
673 | int images_noffset, confs_noffset; | |
674 | int noffset; | |
675 | int ret; | |
676 | ||
677 | /* Find images parent node offset */ | |
678 | images_noffset = fdt_path_offset(fit, FIT_IMAGES_PATH); | |
679 | if (images_noffset < 0) { | |
680 | printf("Can't find images parent node '%s' (%s)\n", | |
681 | FIT_IMAGES_PATH, fdt_strerror(images_noffset)); | |
682 | return images_noffset; | |
683 | } | |
684 | ||
685 | /* Process its subnodes, print out component images details */ | |
686 | for (noffset = fdt_first_subnode(fit, images_noffset); | |
687 | noffset >= 0; | |
688 | noffset = fdt_next_subnode(fit, noffset)) { | |
689 | /* | |
690 | * Direct child node of the images parent node, | |
691 | * i.e. component image node. | |
692 | */ | |
693 | ret = fit_image_add_verification_data(keydir, keydest, | |
694 | fit, noffset, comment, require_keys, engine_id); | |
695 | if (ret) | |
696 | return ret; | |
697 | } | |
698 | ||
699 | /* If there are no keys, we can't sign configurations */ | |
700 | if (!IMAGE_ENABLE_SIGN || !keydir) | |
701 | return 0; | |
702 | ||
703 | /* Find configurations parent node offset */ | |
704 | confs_noffset = fdt_path_offset(fit, FIT_CONFS_PATH); | |
705 | if (confs_noffset < 0) { | |
706 | printf("Can't find images parent node '%s' (%s)\n", | |
707 | FIT_CONFS_PATH, fdt_strerror(confs_noffset)); | |
708 | return -ENOENT; | |
709 | } | |
710 | ||
711 | /* Process its subnodes, print out component images details */ | |
712 | for (noffset = fdt_first_subnode(fit, confs_noffset); | |
713 | noffset >= 0; | |
714 | noffset = fdt_next_subnode(fit, noffset)) { | |
715 | ret = fit_config_add_verification_data(keydir, keydest, | |
716 | fit, noffset, comment, | |
717 | require_keys, | |
718 | engine_id); | |
719 | if (ret) | |
720 | return ret; | |
721 | } | |
722 | ||
723 | return 0; | |
724 | } | |
725 | ||
726 | #ifdef CONFIG_FIT_SIGNATURE | |
727 | int fit_check_sign(const void *fit, const void *key) | |
728 | { | |
729 | int cfg_noffset; | |
730 | int ret; | |
731 | ||
732 | cfg_noffset = fit_conf_get_node(fit, NULL); | |
733 | if (!cfg_noffset) | |
734 | return -1; | |
735 | ||
736 | printf("Verifying Hash Integrity ... "); | |
737 | ret = fit_config_verify(fit, cfg_noffset); | |
738 | if (ret) | |
739 | return ret; | |
740 | ret = bootm_host_load_images(fit, cfg_noffset); | |
741 | ||
742 | return ret; | |
743 | } | |
744 | #endif |