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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, [email protected]. | |
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) { | |
a9468115 SG |
227 | if (ret == -FDT_ERR_NOSPACE) |
228 | return -ENOSPC; | |
229 | printf("Can't write signature for '%s' signature node in '%s' conf node: %s\n", | |
56518e71 SG |
230 | node_name, image_name, fdt_strerror(ret)); |
231 | return -1; | |
232 | } | |
233 | free(value); | |
234 | ||
235 | /* Get keyname again, as FDT has changed and invalidated our pointer */ | |
236 | info.keyname = fdt_getprop(fit, noffset, "key-name-hint", NULL); | |
237 | ||
238 | /* Write the public key into the supplied FDT file */ | |
239 | if (keydest && info.algo->add_verify_data(&info, keydest)) { | |
240 | printf("Failed to add verification data for '%s' signature node in '%s' image node\n", | |
241 | node_name, image_name); | |
242 | return -1; | |
243 | } | |
244 | ||
245 | return 0; | |
246 | } | |
247 | ||
248 | /** | |
249 | * fit_image_add_verification_data() - calculate/set verig. data for image node | |
250 | * | |
251 | * This adds hash and signature values for an component image node. | |
bbb467dc SG |
252 | * |
253 | * All existing hash subnodes are checked, if algorithm property is set to | |
254 | * one of the supported hash algorithms, hash value is computed and | |
255 | * corresponding hash node property is set, for example: | |
604f23dd SG |
256 | * |
257 | * Input component image node structure: | |
258 | * | |
259 | * o image@1 (at image_noffset) | |
260 | * | - data = [binary data] | |
261 | * o hash@1 | |
262 | * |- algo = "sha1" | |
263 | * | |
264 | * Output component image node structure: | |
265 | * | |
266 | * o image@1 (at image_noffset) | |
267 | * | - data = [binary data] | |
268 | * o hash@1 | |
269 | * |- algo = "sha1" | |
270 | * |- value = sha1(data) | |
271 | * | |
bbb467dc SG |
272 | * For signature details, please see doc/uImage.FIT/signature.txt |
273 | * | |
56518e71 SG |
274 | * @keydir Directory containing *.key and *.crt files (or NULL) |
275 | * @keydest FDT Blob to write public keys into (NULL if none) | |
bbb467dc SG |
276 | * @fit: Pointer to the FIT format image header |
277 | * @image_noffset: Requested component image node | |
56518e71 SG |
278 | * @comment: Comment to add to signature nodes |
279 | * @require_keys: Mark all keys as 'required' | |
bbb467dc | 280 | * @return: 0 on success, <0 on failure |
604f23dd | 281 | */ |
56518e71 SG |
282 | int fit_image_add_verification_data(const char *keydir, void *keydest, |
283 | void *fit, int image_noffset, const char *comment, | |
284 | int require_keys) | |
604f23dd | 285 | { |
bbb467dc | 286 | const char *image_name; |
604f23dd SG |
287 | const void *data; |
288 | size_t size; | |
604f23dd | 289 | int noffset; |
604f23dd SG |
290 | |
291 | /* Get image data and data length */ | |
292 | if (fit_image_get_data(fit, image_noffset, &data, &size)) { | |
293 | printf("Can't get image data/size\n"); | |
294 | return -1; | |
295 | } | |
296 | ||
94e5fa46 SG |
297 | image_name = fit_get_name(fit, image_noffset, NULL); |
298 | ||
604f23dd | 299 | /* Process all hash subnodes of the component image node */ |
bbb467dc SG |
300 | for (noffset = fdt_first_subnode(fit, image_noffset); |
301 | noffset >= 0; | |
302 | noffset = fdt_next_subnode(fit, noffset)) { | |
303 | const char *node_name; | |
304 | int ret = 0; | |
305 | ||
306 | /* | |
307 | * Check subnode name, must be equal to "hash" or "signature". | |
308 | * Multiple hash nodes require unique unit node | |
309 | * names, e.g. hash@1, hash@2, signature@1, etc. | |
310 | */ | |
311 | node_name = fit_get_name(fit, noffset, NULL); | |
312 | if (!strncmp(node_name, FIT_HASH_NODENAME, | |
313 | strlen(FIT_HASH_NODENAME))) { | |
314 | ret = fit_image_process_hash(fit, image_name, noffset, | |
315 | data, size); | |
56518e71 SG |
316 | } else if (IMAGE_ENABLE_SIGN && keydir && |
317 | !strncmp(node_name, FIT_SIG_NODENAME, | |
318 | strlen(FIT_SIG_NODENAME))) { | |
319 | ret = fit_image_process_sig(keydir, keydest, | |
320 | fit, image_name, noffset, data, size, | |
321 | comment, require_keys); | |
604f23dd | 322 | } |
bbb467dc SG |
323 | if (ret) |
324 | return -1; | |
325 | } | |
326 | ||
327 | return 0; | |
328 | } | |
329 | ||
4d098529 SG |
330 | struct strlist { |
331 | int count; | |
332 | char **strings; | |
333 | }; | |
334 | ||
335 | static void strlist_init(struct strlist *list) | |
336 | { | |
337 | memset(list, '\0', sizeof(*list)); | |
338 | } | |
339 | ||
340 | static void strlist_free(struct strlist *list) | |
341 | { | |
342 | int i; | |
343 | ||
344 | for (i = 0; i < list->count; i++) | |
345 | free(list->strings[i]); | |
346 | free(list->strings); | |
347 | } | |
348 | ||
349 | static int strlist_add(struct strlist *list, const char *str) | |
350 | { | |
351 | char *dup; | |
352 | ||
353 | dup = strdup(str); | |
354 | list->strings = realloc(list->strings, | |
355 | (list->count + 1) * sizeof(char *)); | |
356 | if (!list || !str) | |
357 | return -1; | |
358 | list->strings[list->count++] = dup; | |
359 | ||
360 | return 0; | |
361 | } | |
362 | ||
363 | static const char *fit_config_get_image_list(void *fit, int noffset, | |
364 | int *lenp, int *allow_missingp) | |
365 | { | |
366 | static const char default_list[] = FIT_KERNEL_PROP "\0" | |
367 | FIT_FDT_PROP; | |
368 | const char *prop; | |
369 | ||
370 | /* If there is an "image" property, use that */ | |
371 | prop = fdt_getprop(fit, noffset, "sign-images", lenp); | |
372 | if (prop) { | |
373 | *allow_missingp = 0; | |
374 | return *lenp ? prop : NULL; | |
375 | } | |
376 | ||
377 | /* Default image list */ | |
378 | *allow_missingp = 1; | |
379 | *lenp = sizeof(default_list); | |
380 | ||
381 | return default_list; | |
382 | } | |
383 | ||
384 | static int fit_config_get_hash_list(void *fit, int conf_noffset, | |
385 | int sig_offset, struct strlist *node_inc) | |
386 | { | |
387 | int allow_missing; | |
388 | const char *prop, *iname, *end; | |
389 | const char *conf_name, *sig_name; | |
390 | char name[200], path[200]; | |
391 | int image_count; | |
392 | int ret, len; | |
393 | ||
394 | conf_name = fit_get_name(fit, conf_noffset, NULL); | |
395 | sig_name = fit_get_name(fit, sig_offset, NULL); | |
396 | ||
397 | /* | |
398 | * Build a list of nodes we need to hash. We always need the root | |
399 | * node and the configuration. | |
400 | */ | |
401 | strlist_init(node_inc); | |
402 | snprintf(name, sizeof(name), "%s/%s", FIT_CONFS_PATH, conf_name); | |
403 | if (strlist_add(node_inc, "/") || | |
404 | strlist_add(node_inc, name)) | |
405 | goto err_mem; | |
406 | ||
407 | /* Get a list of images that we intend to sign */ | |
66b36f83 | 408 | prop = fit_config_get_image_list(fit, sig_offset, &len, |
4d098529 SG |
409 | &allow_missing); |
410 | if (!prop) | |
411 | return 0; | |
412 | ||
413 | /* Locate the images */ | |
414 | end = prop + len; | |
415 | image_count = 0; | |
416 | for (iname = prop; iname < end; iname += strlen(iname) + 1) { | |
417 | int noffset; | |
418 | int image_noffset; | |
419 | int hash_count; | |
420 | ||
421 | image_noffset = fit_conf_get_prop_node(fit, conf_noffset, | |
422 | iname); | |
423 | if (image_noffset < 0) { | |
424 | printf("Failed to find image '%s' in configuration '%s/%s'\n", | |
425 | iname, conf_name, sig_name); | |
426 | if (allow_missing) | |
427 | continue; | |
428 | ||
429 | return -ENOENT; | |
430 | } | |
431 | ||
432 | ret = fdt_get_path(fit, image_noffset, path, sizeof(path)); | |
433 | if (ret < 0) | |
434 | goto err_path; | |
435 | if (strlist_add(node_inc, path)) | |
436 | goto err_mem; | |
437 | ||
438 | snprintf(name, sizeof(name), "%s/%s", FIT_CONFS_PATH, | |
439 | conf_name); | |
440 | ||
441 | /* Add all this image's hashes */ | |
442 | hash_count = 0; | |
443 | for (noffset = fdt_first_subnode(fit, image_noffset); | |
444 | noffset >= 0; | |
445 | noffset = fdt_next_subnode(fit, noffset)) { | |
446 | const char *name = fit_get_name(fit, noffset, NULL); | |
447 | ||
448 | if (strncmp(name, FIT_HASH_NODENAME, | |
449 | strlen(FIT_HASH_NODENAME))) | |
450 | continue; | |
451 | ret = fdt_get_path(fit, noffset, path, sizeof(path)); | |
452 | if (ret < 0) | |
453 | goto err_path; | |
454 | if (strlist_add(node_inc, path)) | |
455 | goto err_mem; | |
456 | hash_count++; | |
457 | } | |
458 | ||
459 | if (!hash_count) { | |
460 | printf("Failed to find any hash nodes in configuration '%s/%s' image '%s' - without these it is not possible to verify this image\n", | |
461 | conf_name, sig_name, iname); | |
462 | return -ENOMSG; | |
463 | } | |
464 | ||
465 | image_count++; | |
466 | } | |
467 | ||
468 | if (!image_count) { | |
469 | printf("Failed to find any images for configuration '%s/%s'\n", | |
470 | conf_name, sig_name); | |
471 | return -ENOMSG; | |
472 | } | |
473 | ||
474 | return 0; | |
475 | ||
476 | err_mem: | |
477 | printf("Out of memory processing configuration '%s/%s'\n", conf_name, | |
478 | sig_name); | |
479 | return -ENOMEM; | |
480 | ||
481 | err_path: | |
482 | printf("Failed to get path for image '%s' in configuration '%s/%s': %s\n", | |
483 | iname, conf_name, sig_name, fdt_strerror(ret)); | |
484 | return -ENOENT; | |
485 | } | |
486 | ||
487 | static int fit_config_get_data(void *fit, int conf_noffset, int noffset, | |
488 | struct image_region **regionp, int *region_countp, | |
489 | char **region_propp, int *region_proplen) | |
490 | { | |
491 | char * const exc_prop[] = {"data"}; | |
492 | struct strlist node_inc; | |
493 | struct image_region *region; | |
494 | struct fdt_region fdt_regions[100]; | |
495 | const char *conf_name, *sig_name; | |
496 | char path[200]; | |
497 | int count, i; | |
498 | char *region_prop; | |
499 | int ret, len; | |
500 | ||
501 | conf_name = fit_get_name(fit, conf_noffset, NULL); | |
502 | sig_name = fit_get_name(fit, conf_noffset, NULL); | |
503 | debug("%s: conf='%s', sig='%s'\n", __func__, conf_name, sig_name); | |
504 | ||
505 | /* Get a list of nodes we want to hash */ | |
506 | ret = fit_config_get_hash_list(fit, conf_noffset, noffset, &node_inc); | |
507 | if (ret) | |
508 | return ret; | |
509 | ||
510 | /* Get a list of regions to hash */ | |
511 | count = fdt_find_regions(fit, node_inc.strings, node_inc.count, | |
512 | exc_prop, ARRAY_SIZE(exc_prop), | |
513 | fdt_regions, ARRAY_SIZE(fdt_regions), | |
514 | path, sizeof(path), 1); | |
515 | if (count < 0) { | |
516 | printf("Failed to hash configuration '%s/%s': %s\n", conf_name, | |
517 | sig_name, fdt_strerror(ret)); | |
518 | return -EIO; | |
519 | } | |
520 | if (count == 0) { | |
521 | printf("No data to hash for configuration '%s/%s': %s\n", | |
522 | conf_name, sig_name, fdt_strerror(ret)); | |
523 | return -EINVAL; | |
524 | } | |
525 | ||
526 | /* Build our list of data blocks */ | |
527 | region = fit_region_make_list(fit, fdt_regions, count, NULL); | |
528 | if (!region) { | |
529 | printf("Out of memory hashing configuration '%s/%s'\n", | |
530 | conf_name, sig_name); | |
531 | return -ENOMEM; | |
532 | } | |
533 | ||
534 | /* Create a list of all hashed properties */ | |
535 | debug("Hash nodes:\n"); | |
536 | for (i = len = 0; i < node_inc.count; i++) { | |
537 | debug(" %s\n", node_inc.strings[i]); | |
538 | len += strlen(node_inc.strings[i]) + 1; | |
539 | } | |
540 | region_prop = malloc(len); | |
541 | if (!region_prop) { | |
542 | printf("Out of memory setting up regions for configuration '%s/%s'\n", | |
543 | conf_name, sig_name); | |
544 | return -ENOMEM; | |
545 | } | |
546 | for (i = len = 0; i < node_inc.count; | |
547 | len += strlen(node_inc.strings[i]) + 1, i++) | |
548 | strcpy(region_prop + len, node_inc.strings[i]); | |
549 | strlist_free(&node_inc); | |
550 | ||
551 | *region_countp = count; | |
552 | *regionp = region; | |
553 | *region_propp = region_prop; | |
554 | *region_proplen = len; | |
555 | ||
556 | return 0; | |
557 | } | |
558 | ||
559 | static int fit_config_process_sig(const char *keydir, void *keydest, | |
560 | void *fit, const char *conf_name, int conf_noffset, | |
561 | int noffset, const char *comment, int require_keys) | |
562 | { | |
563 | struct image_sign_info info; | |
564 | const char *node_name; | |
565 | struct image_region *region; | |
566 | char *region_prop; | |
567 | int region_proplen; | |
568 | int region_count; | |
569 | uint8_t *value; | |
570 | uint value_len; | |
571 | int ret; | |
572 | ||
573 | node_name = fit_get_name(fit, noffset, NULL); | |
574 | if (fit_config_get_data(fit, conf_noffset, noffset, ®ion, | |
575 | ®ion_count, ®ion_prop, ®ion_proplen)) | |
576 | return -1; | |
577 | ||
578 | if (fit_image_setup_sig(&info, keydir, fit, conf_name, noffset, | |
579 | require_keys ? "conf" : NULL)) | |
580 | return -1; | |
581 | ||
582 | ret = info.algo->sign(&info, region, region_count, &value, &value_len); | |
583 | free(region); | |
584 | if (ret) { | |
585 | printf("Failed to sign '%s' signature node in '%s' conf node\n", | |
586 | node_name, conf_name); | |
587 | ||
588 | /* We allow keys to be missing */ | |
589 | if (ret == -ENOENT) | |
590 | return 0; | |
591 | return -1; | |
592 | } | |
593 | ||
a9468115 SG |
594 | ret = fit_image_write_sig(fit, noffset, value, value_len, comment, |
595 | region_prop, region_proplen); | |
596 | if (ret) { | |
597 | if (ret == -FDT_ERR_NOSPACE) | |
598 | return -ENOSPC; | |
599 | printf("Can't write signature for '%s' signature node in '%s' conf node: %s\n", | |
600 | node_name, conf_name, fdt_strerror(ret)); | |
4d098529 SG |
601 | return -1; |
602 | } | |
603 | free(value); | |
604 | free(region_prop); | |
605 | ||
606 | /* Get keyname again, as FDT has changed and invalidated our pointer */ | |
607 | info.keyname = fdt_getprop(fit, noffset, "key-name-hint", NULL); | |
608 | ||
609 | /* Write the public key into the supplied FDT file */ | |
a9468115 SG |
610 | if (keydest) { |
611 | ret = info.algo->add_verify_data(&info, keydest); | |
612 | if (ret) { | |
613 | printf("Failed to add verification data for '%s' signature node in '%s' image node\n", | |
614 | node_name, conf_name); | |
615 | return ret == FDT_ERR_NOSPACE ? -ENOSPC : -EIO; | |
616 | } | |
4d098529 SG |
617 | } |
618 | ||
619 | return 0; | |
620 | } | |
621 | ||
622 | static int fit_config_add_verification_data(const char *keydir, void *keydest, | |
623 | void *fit, int conf_noffset, const char *comment, | |
624 | int require_keys) | |
625 | { | |
626 | const char *conf_name; | |
627 | int noffset; | |
628 | ||
629 | conf_name = fit_get_name(fit, conf_noffset, NULL); | |
630 | ||
631 | /* Process all hash subnodes of the configuration node */ | |
632 | for (noffset = fdt_first_subnode(fit, conf_noffset); | |
633 | noffset >= 0; | |
634 | noffset = fdt_next_subnode(fit, noffset)) { | |
635 | const char *node_name; | |
636 | int ret = 0; | |
637 | ||
638 | node_name = fit_get_name(fit, noffset, NULL); | |
639 | if (!strncmp(node_name, FIT_SIG_NODENAME, | |
640 | strlen(FIT_SIG_NODENAME))) { | |
641 | ret = fit_config_process_sig(keydir, keydest, | |
642 | fit, conf_name, conf_noffset, noffset, comment, | |
643 | require_keys); | |
644 | } | |
645 | if (ret) | |
646 | return ret; | |
647 | } | |
648 | ||
649 | return 0; | |
650 | } | |
651 | ||
56518e71 SG |
652 | int fit_add_verification_data(const char *keydir, void *keydest, void *fit, |
653 | const char *comment, int require_keys) | |
bbb467dc | 654 | { |
4d098529 | 655 | int images_noffset, confs_noffset; |
bbb467dc SG |
656 | int noffset; |
657 | int ret; | |
658 | ||
659 | /* Find images parent node offset */ | |
660 | images_noffset = fdt_path_offset(fit, FIT_IMAGES_PATH); | |
661 | if (images_noffset < 0) { | |
662 | printf("Can't find images parent node '%s' (%s)\n", | |
663 | FIT_IMAGES_PATH, fdt_strerror(images_noffset)); | |
664 | return images_noffset; | |
665 | } | |
666 | ||
667 | /* Process its subnodes, print out component images details */ | |
668 | for (noffset = fdt_first_subnode(fit, images_noffset); | |
669 | noffset >= 0; | |
670 | noffset = fdt_next_subnode(fit, noffset)) { | |
671 | /* | |
672 | * Direct child node of the images parent node, | |
673 | * i.e. component image node. | |
674 | */ | |
56518e71 SG |
675 | ret = fit_image_add_verification_data(keydir, keydest, |
676 | fit, noffset, comment, require_keys); | |
bbb467dc SG |
677 | if (ret) |
678 | return ret; | |
604f23dd SG |
679 | } |
680 | ||
4d098529 SG |
681 | /* If there are no keys, we can't sign configurations */ |
682 | if (!IMAGE_ENABLE_SIGN || !keydir) | |
683 | return 0; | |
684 | ||
685 | /* Find configurations parent node offset */ | |
686 | confs_noffset = fdt_path_offset(fit, FIT_CONFS_PATH); | |
687 | if (confs_noffset < 0) { | |
688 | printf("Can't find images parent node '%s' (%s)\n", | |
689 | FIT_IMAGES_PATH, fdt_strerror(confs_noffset)); | |
690 | return -ENOENT; | |
691 | } | |
692 | ||
693 | /* Process its subnodes, print out component images details */ | |
694 | for (noffset = fdt_first_subnode(fit, confs_noffset); | |
695 | noffset >= 0; | |
696 | noffset = fdt_next_subnode(fit, noffset)) { | |
697 | ret = fit_config_add_verification_data(keydir, keydest, | |
698 | fit, noffset, comment, | |
699 | require_keys); | |
700 | if (ret) | |
701 | return ret; | |
702 | } | |
703 | ||
604f23dd SG |
704 | return 0; |
705 | } | |
29a23f9d HS |
706 | |
707 | #ifdef CONFIG_FIT_SIGNATURE | |
708 | int fit_check_sign(const void *working_fdt, const void *key) | |
709 | { | |
710 | int cfg_noffset; | |
711 | int ret; | |
712 | ||
713 | cfg_noffset = fit_conf_get_node(working_fdt, NULL); | |
714 | if (!cfg_noffset) | |
715 | return -1; | |
716 | ||
717 | ret = fit_config_verify(working_fdt, cfg_noffset); | |
718 | return ret; | |
719 | } | |
720 | #endif |