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604f23dd SG |
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 | * | |
1a459660 | 9 | * SPDX-License-Identifier: GPL-2.0+ |
604f23dd SG |
10 | */ |
11 | ||
12 | #include "mkimage.h" | |
604f23dd | 13 | #include <image.h> |
56518e71 | 14 | #include <version.h> |
604f23dd | 15 | |
b7260910 SG |
16 | /** |
17 | * fit_set_hash_value - set hash value in requested has node | |
18 | * @fit: pointer to the FIT format image header | |
19 | * @noffset: hash node offset | |
20 | * @value: hash value to be set | |
21 | * @value_len: hash value length | |
22 | * | |
23 | * fit_set_hash_value() attempts to set hash value in a node at offset | |
24 | * given and returns operation status to the caller. | |
25 | * | |
26 | * returns | |
27 | * 0, on success | |
28 | * -1, on failure | |
29 | */ | |
30 | static int fit_set_hash_value(void *fit, int noffset, uint8_t *value, | |
31 | int value_len) | |
32 | { | |
33 | int ret; | |
34 | ||
35 | ret = fdt_setprop(fit, noffset, FIT_VALUE_PROP, value, value_len); | |
36 | if (ret) { | |
37 | printf("Can't set hash '%s' property for '%s' node(%s)\n", | |
38 | FIT_VALUE_PROP, fit_get_name(fit, noffset, NULL), | |
39 | fdt_strerror(ret)); | |
40 | return -1; | |
41 | } | |
42 | ||
43 | return 0; | |
44 | } | |
45 | ||
94e5fa46 SG |
46 | /** |
47 | * fit_image_process_hash - Process a single subnode of the images/ node | |
48 | * | |
49 | * Check each subnode and process accordingly. For hash nodes we generate | |
50 | * a hash of the supplised data and store it in the node. | |
51 | * | |
52 | * @fit: pointer to the FIT format image header | |
53 | * @image_name: name of image being processes (used to display errors) | |
54 | * @noffset: subnode offset | |
55 | * @data: data to process | |
56 | * @size: size of data in bytes | |
57 | * @return 0 if ok, -1 on error | |
58 | */ | |
59 | static int fit_image_process_hash(void *fit, const char *image_name, | |
60 | int noffset, const void *data, size_t size) | |
61 | { | |
62 | uint8_t value[FIT_MAX_HASH_LEN]; | |
bbb467dc | 63 | const char *node_name; |
94e5fa46 SG |
64 | int value_len; |
65 | char *algo; | |
66 | ||
bbb467dc | 67 | node_name = fit_get_name(fit, noffset, NULL); |
94e5fa46 SG |
68 | |
69 | if (fit_image_hash_get_algo(fit, noffset, &algo)) { | |
70 | printf("Can't get hash algo property for '%s' hash node in '%s' image node\n", | |
bbb467dc | 71 | node_name, image_name); |
94e5fa46 SG |
72 | return -1; |
73 | } | |
74 | ||
75 | if (calculate_hash(data, size, algo, value, &value_len)) { | |
76 | printf("Unsupported hash algorithm (%s) for '%s' hash node in '%s' image node\n", | |
bbb467dc | 77 | algo, node_name, image_name); |
94e5fa46 SG |
78 | return -1; |
79 | } | |
80 | ||
b7260910 | 81 | if (fit_set_hash_value(fit, noffset, value, value_len)) { |
94e5fa46 | 82 | printf("Can't set hash value for '%s' hash node in '%s' image node\n", |
bbb467dc | 83 | node_name, image_name); |
94e5fa46 SG |
84 | return -1; |
85 | } | |
86 | ||
87 | return 0; | |
88 | } | |
89 | ||
604f23dd | 90 | /** |
56518e71 | 91 | * fit_image_write_sig() - write the signature to a FIT |
604f23dd | 92 | * |
56518e71 SG |
93 | * This writes the signature and signer data to the FIT. |
94 | * | |
95 | * @fit: pointer to the FIT format image header | |
96 | * @noffset: hash node offset | |
97 | * @value: signature value to be set | |
98 | * @value_len: signature value length | |
99 | * @comment: Text comment to write (NULL for none) | |
100 | * | |
101 | * returns | |
102 | * 0, on success | |
103 | * -FDT_ERR_..., on failure | |
104 | */ | |
105 | static int fit_image_write_sig(void *fit, int noffset, uint8_t *value, | |
106 | int value_len, const char *comment, const char *region_prop, | |
107 | int region_proplen) | |
108 | { | |
109 | int string_size; | |
110 | int ret; | |
111 | ||
112 | /* | |
113 | * Get the current string size, before we update the FIT and add | |
114 | * more | |
115 | */ | |
116 | string_size = fdt_size_dt_strings(fit); | |
117 | ||
118 | ret = fdt_setprop(fit, noffset, FIT_VALUE_PROP, value, value_len); | |
119 | if (!ret) { | |
120 | ret = fdt_setprop_string(fit, noffset, "signer-name", | |
121 | "mkimage"); | |
122 | } | |
123 | if (!ret) { | |
124 | ret = fdt_setprop_string(fit, noffset, "signer-version", | |
125 | PLAIN_VERSION); | |
126 | } | |
127 | if (comment && !ret) | |
128 | ret = fdt_setprop_string(fit, noffset, "comment", comment); | |
129 | if (!ret) | |
130 | ret = fit_set_timestamp(fit, noffset, time(NULL)); | |
131 | if (region_prop && !ret) { | |
132 | uint32_t strdata[2]; | |
133 | ||
134 | ret = fdt_setprop(fit, noffset, "hashed-nodes", | |
135 | region_prop, region_proplen); | |
136 | strdata[0] = 0; | |
137 | strdata[1] = cpu_to_fdt32(string_size); | |
138 | if (!ret) { | |
139 | ret = fdt_setprop(fit, noffset, "hashed-strings", | |
140 | strdata, sizeof(strdata)); | |
141 | } | |
142 | } | |
143 | ||
144 | return ret; | |
145 | } | |
146 | ||
147 | static int fit_image_setup_sig(struct image_sign_info *info, | |
148 | const char *keydir, void *fit, const char *image_name, | |
149 | int noffset, const char *require_keys) | |
150 | { | |
151 | const char *node_name; | |
152 | char *algo_name; | |
153 | ||
154 | node_name = fit_get_name(fit, noffset, NULL); | |
155 | if (fit_image_hash_get_algo(fit, noffset, &algo_name)) { | |
156 | printf("Can't get algo property for '%s' signature node in '%s' image node\n", | |
157 | node_name, image_name); | |
158 | return -1; | |
159 | } | |
160 | ||
161 | memset(info, '\0', sizeof(*info)); | |
162 | info->keydir = keydir; | |
163 | info->keyname = fdt_getprop(fit, noffset, "key-name-hint", NULL); | |
164 | info->fit = fit; | |
165 | info->node_offset = noffset; | |
166 | info->algo = image_get_sig_algo(algo_name); | |
167 | info->require_keys = require_keys; | |
168 | if (!info->algo) { | |
169 | printf("Unsupported signature algorithm (%s) for '%s' signature node in '%s' image node\n", | |
170 | algo_name, node_name, image_name); | |
171 | return -1; | |
172 | } | |
173 | ||
174 | return 0; | |
175 | } | |
176 | ||
177 | /** | |
178 | * fit_image_process_sig- Process a single subnode of the images/ node | |
179 | * | |
180 | * Check each subnode and process accordingly. For signature nodes we | |
181 | * generate a signed hash of the supplised data and store it in the node. | |
182 | * | |
183 | * @keydir: Directory containing keys to use for signing | |
184 | * @keydest: Destination FDT blob to write public keys into | |
185 | * @fit: pointer to the FIT format image header | |
186 | * @image_name: name of image being processes (used to display errors) | |
187 | * @noffset: subnode offset | |
188 | * @data: data to process | |
189 | * @size: size of data in bytes | |
190 | * @comment: Comment to add to signature nodes | |
191 | * @require_keys: Mark all keys as 'required' | |
192 | * @return 0 if ok, -1 on error | |
193 | */ | |
194 | static int fit_image_process_sig(const char *keydir, void *keydest, | |
195 | void *fit, const char *image_name, | |
196 | int noffset, const void *data, size_t size, | |
197 | const char *comment, int require_keys) | |
198 | { | |
199 | struct image_sign_info info; | |
200 | struct image_region region; | |
201 | const char *node_name; | |
202 | uint8_t *value; | |
203 | uint value_len; | |
204 | int ret; | |
205 | ||
206 | if (fit_image_setup_sig(&info, keydir, fit, image_name, noffset, | |
207 | require_keys ? "image" : NULL)) | |
208 | return -1; | |
209 | ||
210 | node_name = fit_get_name(fit, noffset, NULL); | |
211 | region.data = data; | |
212 | region.size = size; | |
213 | ret = info.algo->sign(&info, ®ion, 1, &value, &value_len); | |
214 | if (ret) { | |
215 | printf("Failed to sign '%s' signature node in '%s' image node: %d\n", | |
216 | node_name, image_name, ret); | |
217 | ||
218 | /* We allow keys to be missing */ | |
219 | if (ret == -ENOENT) | |
220 | return 0; | |
221 | return -1; | |
222 | } | |
223 | ||
224 | ret = fit_image_write_sig(fit, noffset, value, value_len, comment, | |
225 | NULL, 0); | |
226 | if (ret) { | |
227 | printf("Can't write signature for '%s' signature node in '%s' image node: %s\n", | |
228 | node_name, image_name, fdt_strerror(ret)); | |
229 | return -1; | |
230 | } | |
231 | free(value); | |
232 | ||
233 | /* Get keyname again, as FDT has changed and invalidated our pointer */ | |
234 | info.keyname = fdt_getprop(fit, noffset, "key-name-hint", NULL); | |
235 | ||
236 | /* Write the public key into the supplied FDT file */ | |
237 | if (keydest && info.algo->add_verify_data(&info, keydest)) { | |
238 | printf("Failed to add verification data for '%s' signature node in '%s' image node\n", | |
239 | node_name, image_name); | |
240 | return -1; | |
241 | } | |
242 | ||
243 | return 0; | |
244 | } | |
245 | ||
246 | /** | |
247 | * fit_image_add_verification_data() - calculate/set verig. data for image node | |
248 | * | |
249 | * This adds hash and signature values for an component image node. | |
bbb467dc SG |
250 | * |
251 | * All existing hash subnodes are checked, if algorithm property is set to | |
252 | * one of the supported hash algorithms, hash value is computed and | |
253 | * corresponding hash node property is set, for example: | |
604f23dd SG |
254 | * |
255 | * Input component image node structure: | |
256 | * | |
257 | * o image@1 (at image_noffset) | |
258 | * | - data = [binary data] | |
259 | * o hash@1 | |
260 | * |- algo = "sha1" | |
261 | * | |
262 | * Output component image node structure: | |
263 | * | |
264 | * o image@1 (at image_noffset) | |
265 | * | - data = [binary data] | |
266 | * o hash@1 | |
267 | * |- algo = "sha1" | |
268 | * |- value = sha1(data) | |
269 | * | |
bbb467dc SG |
270 | * For signature details, please see doc/uImage.FIT/signature.txt |
271 | * | |
56518e71 SG |
272 | * @keydir Directory containing *.key and *.crt files (or NULL) |
273 | * @keydest FDT Blob to write public keys into (NULL if none) | |
bbb467dc SG |
274 | * @fit: Pointer to the FIT format image header |
275 | * @image_noffset: Requested component image node | |
56518e71 SG |
276 | * @comment: Comment to add to signature nodes |
277 | * @require_keys: Mark all keys as 'required' | |
bbb467dc | 278 | * @return: 0 on success, <0 on failure |
604f23dd | 279 | */ |
56518e71 SG |
280 | int fit_image_add_verification_data(const char *keydir, void *keydest, |
281 | void *fit, int image_noffset, const char *comment, | |
282 | int require_keys) | |
604f23dd | 283 | { |
bbb467dc | 284 | const char *image_name; |
604f23dd SG |
285 | const void *data; |
286 | size_t size; | |
604f23dd | 287 | int noffset; |
604f23dd SG |
288 | |
289 | /* Get image data and data length */ | |
290 | if (fit_image_get_data(fit, image_noffset, &data, &size)) { | |
291 | printf("Can't get image data/size\n"); | |
292 | return -1; | |
293 | } | |
294 | ||
94e5fa46 SG |
295 | image_name = fit_get_name(fit, image_noffset, NULL); |
296 | ||
604f23dd | 297 | /* Process all hash subnodes of the component image node */ |
bbb467dc SG |
298 | for (noffset = fdt_first_subnode(fit, image_noffset); |
299 | noffset >= 0; | |
300 | noffset = fdt_next_subnode(fit, noffset)) { | |
301 | const char *node_name; | |
302 | int ret = 0; | |
303 | ||
304 | /* | |
305 | * Check subnode name, must be equal to "hash" or "signature". | |
306 | * Multiple hash nodes require unique unit node | |
307 | * names, e.g. hash@1, hash@2, signature@1, etc. | |
308 | */ | |
309 | node_name = fit_get_name(fit, noffset, NULL); | |
310 | if (!strncmp(node_name, FIT_HASH_NODENAME, | |
311 | strlen(FIT_HASH_NODENAME))) { | |
312 | ret = fit_image_process_hash(fit, image_name, noffset, | |
313 | data, size); | |
56518e71 SG |
314 | } else if (IMAGE_ENABLE_SIGN && keydir && |
315 | !strncmp(node_name, FIT_SIG_NODENAME, | |
316 | strlen(FIT_SIG_NODENAME))) { | |
317 | ret = fit_image_process_sig(keydir, keydest, | |
318 | fit, image_name, noffset, data, size, | |
319 | comment, require_keys); | |
604f23dd | 320 | } |
bbb467dc SG |
321 | if (ret) |
322 | return -1; | |
323 | } | |
324 | ||
325 | return 0; | |
326 | } | |
327 | ||
4d098529 SG |
328 | struct strlist { |
329 | int count; | |
330 | char **strings; | |
331 | }; | |
332 | ||
333 | static void strlist_init(struct strlist *list) | |
334 | { | |
335 | memset(list, '\0', sizeof(*list)); | |
336 | } | |
337 | ||
338 | static void strlist_free(struct strlist *list) | |
339 | { | |
340 | int i; | |
341 | ||
342 | for (i = 0; i < list->count; i++) | |
343 | free(list->strings[i]); | |
344 | free(list->strings); | |
345 | } | |
346 | ||
347 | static int strlist_add(struct strlist *list, const char *str) | |
348 | { | |
349 | char *dup; | |
350 | ||
351 | dup = strdup(str); | |
352 | list->strings = realloc(list->strings, | |
353 | (list->count + 1) * sizeof(char *)); | |
354 | if (!list || !str) | |
355 | return -1; | |
356 | list->strings[list->count++] = dup; | |
357 | ||
358 | return 0; | |
359 | } | |
360 | ||
361 | static const char *fit_config_get_image_list(void *fit, int noffset, | |
362 | int *lenp, int *allow_missingp) | |
363 | { | |
364 | static const char default_list[] = FIT_KERNEL_PROP "\0" | |
365 | FIT_FDT_PROP; | |
366 | const char *prop; | |
367 | ||
368 | /* If there is an "image" property, use that */ | |
369 | prop = fdt_getprop(fit, noffset, "sign-images", lenp); | |
370 | if (prop) { | |
371 | *allow_missingp = 0; | |
372 | return *lenp ? prop : NULL; | |
373 | } | |
374 | ||
375 | /* Default image list */ | |
376 | *allow_missingp = 1; | |
377 | *lenp = sizeof(default_list); | |
378 | ||
379 | return default_list; | |
380 | } | |
381 | ||
382 | static int fit_config_get_hash_list(void *fit, int conf_noffset, | |
383 | int sig_offset, struct strlist *node_inc) | |
384 | { | |
385 | int allow_missing; | |
386 | const char *prop, *iname, *end; | |
387 | const char *conf_name, *sig_name; | |
388 | char name[200], path[200]; | |
389 | int image_count; | |
390 | int ret, len; | |
391 | ||
392 | conf_name = fit_get_name(fit, conf_noffset, NULL); | |
393 | sig_name = fit_get_name(fit, sig_offset, NULL); | |
394 | ||
395 | /* | |
396 | * Build a list of nodes we need to hash. We always need the root | |
397 | * node and the configuration. | |
398 | */ | |
399 | strlist_init(node_inc); | |
400 | snprintf(name, sizeof(name), "%s/%s", FIT_CONFS_PATH, conf_name); | |
401 | if (strlist_add(node_inc, "/") || | |
402 | strlist_add(node_inc, name)) | |
403 | goto err_mem; | |
404 | ||
405 | /* Get a list of images that we intend to sign */ | |
406 | prop = fit_config_get_image_list(fit, conf_noffset, &len, | |
407 | &allow_missing); | |
408 | if (!prop) | |
409 | return 0; | |
410 | ||
411 | /* Locate the images */ | |
412 | end = prop + len; | |
413 | image_count = 0; | |
414 | for (iname = prop; iname < end; iname += strlen(iname) + 1) { | |
415 | int noffset; | |
416 | int image_noffset; | |
417 | int hash_count; | |
418 | ||
419 | image_noffset = fit_conf_get_prop_node(fit, conf_noffset, | |
420 | iname); | |
421 | if (image_noffset < 0) { | |
422 | printf("Failed to find image '%s' in configuration '%s/%s'\n", | |
423 | iname, conf_name, sig_name); | |
424 | if (allow_missing) | |
425 | continue; | |
426 | ||
427 | return -ENOENT; | |
428 | } | |
429 | ||
430 | ret = fdt_get_path(fit, image_noffset, path, sizeof(path)); | |
431 | if (ret < 0) | |
432 | goto err_path; | |
433 | if (strlist_add(node_inc, path)) | |
434 | goto err_mem; | |
435 | ||
436 | snprintf(name, sizeof(name), "%s/%s", FIT_CONFS_PATH, | |
437 | conf_name); | |
438 | ||
439 | /* Add all this image's hashes */ | |
440 | hash_count = 0; | |
441 | for (noffset = fdt_first_subnode(fit, image_noffset); | |
442 | noffset >= 0; | |
443 | noffset = fdt_next_subnode(fit, noffset)) { | |
444 | const char *name = fit_get_name(fit, noffset, NULL); | |
445 | ||
446 | if (strncmp(name, FIT_HASH_NODENAME, | |
447 | strlen(FIT_HASH_NODENAME))) | |
448 | continue; | |
449 | ret = fdt_get_path(fit, noffset, path, sizeof(path)); | |
450 | if (ret < 0) | |
451 | goto err_path; | |
452 | if (strlist_add(node_inc, path)) | |
453 | goto err_mem; | |
454 | hash_count++; | |
455 | } | |
456 | ||
457 | if (!hash_count) { | |
458 | printf("Failed to find any hash nodes in configuration '%s/%s' image '%s' - without these it is not possible to verify this image\n", | |
459 | conf_name, sig_name, iname); | |
460 | return -ENOMSG; | |
461 | } | |
462 | ||
463 | image_count++; | |
464 | } | |
465 | ||
466 | if (!image_count) { | |
467 | printf("Failed to find any images for configuration '%s/%s'\n", | |
468 | conf_name, sig_name); | |
469 | return -ENOMSG; | |
470 | } | |
471 | ||
472 | return 0; | |
473 | ||
474 | err_mem: | |
475 | printf("Out of memory processing configuration '%s/%s'\n", conf_name, | |
476 | sig_name); | |
477 | return -ENOMEM; | |
478 | ||
479 | err_path: | |
480 | printf("Failed to get path for image '%s' in configuration '%s/%s': %s\n", | |
481 | iname, conf_name, sig_name, fdt_strerror(ret)); | |
482 | return -ENOENT; | |
483 | } | |
484 | ||
485 | static int fit_config_get_data(void *fit, int conf_noffset, int noffset, | |
486 | struct image_region **regionp, int *region_countp, | |
487 | char **region_propp, int *region_proplen) | |
488 | { | |
489 | char * const exc_prop[] = {"data"}; | |
490 | struct strlist node_inc; | |
491 | struct image_region *region; | |
492 | struct fdt_region fdt_regions[100]; | |
493 | const char *conf_name, *sig_name; | |
494 | char path[200]; | |
495 | int count, i; | |
496 | char *region_prop; | |
497 | int ret, len; | |
498 | ||
499 | conf_name = fit_get_name(fit, conf_noffset, NULL); | |
500 | sig_name = fit_get_name(fit, conf_noffset, NULL); | |
501 | debug("%s: conf='%s', sig='%s'\n", __func__, conf_name, sig_name); | |
502 | ||
503 | /* Get a list of nodes we want to hash */ | |
504 | ret = fit_config_get_hash_list(fit, conf_noffset, noffset, &node_inc); | |
505 | if (ret) | |
506 | return ret; | |
507 | ||
508 | /* Get a list of regions to hash */ | |
509 | count = fdt_find_regions(fit, node_inc.strings, node_inc.count, | |
510 | exc_prop, ARRAY_SIZE(exc_prop), | |
511 | fdt_regions, ARRAY_SIZE(fdt_regions), | |
512 | path, sizeof(path), 1); | |
513 | if (count < 0) { | |
514 | printf("Failed to hash configuration '%s/%s': %s\n", conf_name, | |
515 | sig_name, fdt_strerror(ret)); | |
516 | return -EIO; | |
517 | } | |
518 | if (count == 0) { | |
519 | printf("No data to hash for configuration '%s/%s': %s\n", | |
520 | conf_name, sig_name, fdt_strerror(ret)); | |
521 | return -EINVAL; | |
522 | } | |
523 | ||
524 | /* Build our list of data blocks */ | |
525 | region = fit_region_make_list(fit, fdt_regions, count, NULL); | |
526 | if (!region) { | |
527 | printf("Out of memory hashing configuration '%s/%s'\n", | |
528 | conf_name, sig_name); | |
529 | return -ENOMEM; | |
530 | } | |
531 | ||
532 | /* Create a list of all hashed properties */ | |
533 | debug("Hash nodes:\n"); | |
534 | for (i = len = 0; i < node_inc.count; i++) { | |
535 | debug(" %s\n", node_inc.strings[i]); | |
536 | len += strlen(node_inc.strings[i]) + 1; | |
537 | } | |
538 | region_prop = malloc(len); | |
539 | if (!region_prop) { | |
540 | printf("Out of memory setting up regions for configuration '%s/%s'\n", | |
541 | conf_name, sig_name); | |
542 | return -ENOMEM; | |
543 | } | |
544 | for (i = len = 0; i < node_inc.count; | |
545 | len += strlen(node_inc.strings[i]) + 1, i++) | |
546 | strcpy(region_prop + len, node_inc.strings[i]); | |
547 | strlist_free(&node_inc); | |
548 | ||
549 | *region_countp = count; | |
550 | *regionp = region; | |
551 | *region_propp = region_prop; | |
552 | *region_proplen = len; | |
553 | ||
554 | return 0; | |
555 | } | |
556 | ||
557 | static int fit_config_process_sig(const char *keydir, void *keydest, | |
558 | void *fit, const char *conf_name, int conf_noffset, | |
559 | int noffset, const char *comment, int require_keys) | |
560 | { | |
561 | struct image_sign_info info; | |
562 | const char *node_name; | |
563 | struct image_region *region; | |
564 | char *region_prop; | |
565 | int region_proplen; | |
566 | int region_count; | |
567 | uint8_t *value; | |
568 | uint value_len; | |
569 | int ret; | |
570 | ||
571 | node_name = fit_get_name(fit, noffset, NULL); | |
572 | if (fit_config_get_data(fit, conf_noffset, noffset, ®ion, | |
573 | ®ion_count, ®ion_prop, ®ion_proplen)) | |
574 | return -1; | |
575 | ||
576 | if (fit_image_setup_sig(&info, keydir, fit, conf_name, noffset, | |
577 | require_keys ? "conf" : NULL)) | |
578 | return -1; | |
579 | ||
580 | ret = info.algo->sign(&info, region, region_count, &value, &value_len); | |
581 | free(region); | |
582 | if (ret) { | |
583 | printf("Failed to sign '%s' signature node in '%s' conf node\n", | |
584 | node_name, conf_name); | |
585 | ||
586 | /* We allow keys to be missing */ | |
587 | if (ret == -ENOENT) | |
588 | return 0; | |
589 | return -1; | |
590 | } | |
591 | ||
592 | if (fit_image_write_sig(fit, noffset, value, value_len, comment, | |
593 | region_prop, region_proplen)) { | |
594 | printf("Can't write signature for '%s' signature node in '%s' conf node\n", | |
595 | node_name, conf_name); | |
596 | return -1; | |
597 | } | |
598 | free(value); | |
599 | free(region_prop); | |
600 | ||
601 | /* Get keyname again, as FDT has changed and invalidated our pointer */ | |
602 | info.keyname = fdt_getprop(fit, noffset, "key-name-hint", NULL); | |
603 | ||
604 | /* Write the public key into the supplied FDT file */ | |
605 | if (keydest && info.algo->add_verify_data(&info, keydest)) { | |
606 | printf("Failed to add verification data for '%s' signature node in '%s' image node\n", | |
607 | node_name, conf_name); | |
608 | return -1; | |
609 | } | |
610 | ||
611 | return 0; | |
612 | } | |
613 | ||
614 | static int fit_config_add_verification_data(const char *keydir, void *keydest, | |
615 | void *fit, int conf_noffset, const char *comment, | |
616 | int require_keys) | |
617 | { | |
618 | const char *conf_name; | |
619 | int noffset; | |
620 | ||
621 | conf_name = fit_get_name(fit, conf_noffset, NULL); | |
622 | ||
623 | /* Process all hash subnodes of the configuration node */ | |
624 | for (noffset = fdt_first_subnode(fit, conf_noffset); | |
625 | noffset >= 0; | |
626 | noffset = fdt_next_subnode(fit, noffset)) { | |
627 | const char *node_name; | |
628 | int ret = 0; | |
629 | ||
630 | node_name = fit_get_name(fit, noffset, NULL); | |
631 | if (!strncmp(node_name, FIT_SIG_NODENAME, | |
632 | strlen(FIT_SIG_NODENAME))) { | |
633 | ret = fit_config_process_sig(keydir, keydest, | |
634 | fit, conf_name, conf_noffset, noffset, comment, | |
635 | require_keys); | |
636 | } | |
637 | if (ret) | |
638 | return ret; | |
639 | } | |
640 | ||
641 | return 0; | |
642 | } | |
643 | ||
56518e71 SG |
644 | int fit_add_verification_data(const char *keydir, void *keydest, void *fit, |
645 | const char *comment, int require_keys) | |
bbb467dc | 646 | { |
4d098529 | 647 | int images_noffset, confs_noffset; |
bbb467dc SG |
648 | int noffset; |
649 | int ret; | |
650 | ||
651 | /* Find images parent node offset */ | |
652 | images_noffset = fdt_path_offset(fit, FIT_IMAGES_PATH); | |
653 | if (images_noffset < 0) { | |
654 | printf("Can't find images parent node '%s' (%s)\n", | |
655 | FIT_IMAGES_PATH, fdt_strerror(images_noffset)); | |
656 | return images_noffset; | |
657 | } | |
658 | ||
659 | /* Process its subnodes, print out component images details */ | |
660 | for (noffset = fdt_first_subnode(fit, images_noffset); | |
661 | noffset >= 0; | |
662 | noffset = fdt_next_subnode(fit, noffset)) { | |
663 | /* | |
664 | * Direct child node of the images parent node, | |
665 | * i.e. component image node. | |
666 | */ | |
56518e71 SG |
667 | ret = fit_image_add_verification_data(keydir, keydest, |
668 | fit, noffset, comment, require_keys); | |
bbb467dc SG |
669 | if (ret) |
670 | return ret; | |
604f23dd SG |
671 | } |
672 | ||
4d098529 SG |
673 | /* If there are no keys, we can't sign configurations */ |
674 | if (!IMAGE_ENABLE_SIGN || !keydir) | |
675 | return 0; | |
676 | ||
677 | /* Find configurations parent node offset */ | |
678 | confs_noffset = fdt_path_offset(fit, FIT_CONFS_PATH); | |
679 | if (confs_noffset < 0) { | |
680 | printf("Can't find images parent node '%s' (%s)\n", | |
681 | FIT_IMAGES_PATH, fdt_strerror(confs_noffset)); | |
682 | return -ENOENT; | |
683 | } | |
684 | ||
685 | /* Process its subnodes, print out component images details */ | |
686 | for (noffset = fdt_first_subnode(fit, confs_noffset); | |
687 | noffset >= 0; | |
688 | noffset = fdt_next_subnode(fit, noffset)) { | |
689 | ret = fit_config_add_verification_data(keydir, keydest, | |
690 | fit, noffset, comment, | |
691 | require_keys); | |
692 | if (ret) | |
693 | return ret; | |
694 | } | |
695 | ||
604f23dd SG |
696 | return 0; |
697 | } |