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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" | |
ce1400f6 | 13 | #include <bootm.h> |
604f23dd | 14 | #include <image.h> |
56518e71 | 15 | #include <version.h> |
604f23dd | 16 | |
b7260910 SG |
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)); | |
1152a05e | 41 | return ret == -FDT_ERR_NOSPACE ? -ENOSPC : -EIO; |
b7260910 SG |
42 | } |
43 | ||
44 | return 0; | |
45 | } | |
46 | ||
94e5fa46 SG |
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]; | |
bbb467dc | 64 | const char *node_name; |
94e5fa46 SG |
65 | int value_len; |
66 | char *algo; | |
1152a05e | 67 | int ret; |
94e5fa46 | 68 | |
bbb467dc | 69 | node_name = fit_get_name(fit, noffset, NULL); |
94e5fa46 SG |
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", | |
bbb467dc | 73 | node_name, image_name); |
1152a05e | 74 | return -ENOENT; |
94e5fa46 SG |
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", | |
bbb467dc | 79 | algo, node_name, image_name); |
1152a05e | 80 | return -EPROTONOSUPPORT; |
94e5fa46 SG |
81 | } |
82 | ||
1152a05e SG |
83 | ret = fit_set_hash_value(fit, noffset, value, value_len); |
84 | if (ret) { | |
94e5fa46 | 85 | printf("Can't set hash value for '%s' hash node in '%s' image node\n", |
bbb467dc | 86 | node_name, image_name); |
1152a05e | 87 | return ret; |
94e5fa46 SG |
88 | } |
89 | ||
90 | return 0; | |
91 | } | |
92 | ||
604f23dd | 93 | /** |
56518e71 | 94 | * fit_image_write_sig() - write the signature to a FIT |
604f23dd | 95 | * |
56518e71 SG |
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) | |
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->algo = image_get_sig_algo(algo_name); | |
170 | info->require_keys = require_keys; | |
171 | if (!info->algo) { | |
172 | printf("Unsupported signature algorithm (%s) for '%s' signature node in '%s' image node\n", | |
173 | algo_name, node_name, image_name); | |
174 | return -1; | |
175 | } | |
176 | ||
177 | return 0; | |
178 | } | |
179 | ||
180 | /** | |
181 | * fit_image_process_sig- Process a single subnode of the images/ node | |
182 | * | |
183 | * Check each subnode and process accordingly. For signature nodes we | |
184 | * generate a signed hash of the supplised data and store it in the node. | |
185 | * | |
186 | * @keydir: Directory containing keys to use for signing | |
187 | * @keydest: Destination FDT blob to write public keys into | |
188 | * @fit: pointer to the FIT format image header | |
189 | * @image_name: name of image being processes (used to display errors) | |
190 | * @noffset: subnode offset | |
191 | * @data: data to process | |
192 | * @size: size of data in bytes | |
193 | * @comment: Comment to add to signature nodes | |
194 | * @require_keys: Mark all keys as 'required' | |
195 | * @return 0 if ok, -1 on error | |
196 | */ | |
197 | static int fit_image_process_sig(const char *keydir, void *keydest, | |
198 | void *fit, const char *image_name, | |
199 | int noffset, const void *data, size_t size, | |
200 | const char *comment, int require_keys) | |
201 | { | |
202 | struct image_sign_info info; | |
203 | struct image_region region; | |
204 | const char *node_name; | |
205 | uint8_t *value; | |
206 | uint value_len; | |
207 | int ret; | |
208 | ||
209 | if (fit_image_setup_sig(&info, keydir, fit, image_name, noffset, | |
210 | require_keys ? "image" : NULL)) | |
211 | return -1; | |
212 | ||
213 | node_name = fit_get_name(fit, noffset, NULL); | |
214 | region.data = data; | |
215 | region.size = size; | |
216 | ret = info.algo->sign(&info, ®ion, 1, &value, &value_len); | |
217 | if (ret) { | |
218 | printf("Failed to sign '%s' signature node in '%s' image node: %d\n", | |
219 | node_name, image_name, ret); | |
220 | ||
221 | /* We allow keys to be missing */ | |
222 | if (ret == -ENOENT) | |
223 | return 0; | |
224 | return -1; | |
225 | } | |
226 | ||
227 | ret = fit_image_write_sig(fit, noffset, value, value_len, comment, | |
228 | NULL, 0); | |
229 | if (ret) { | |
a9468115 SG |
230 | if (ret == -FDT_ERR_NOSPACE) |
231 | return -ENOSPC; | |
232 | printf("Can't write signature for '%s' signature node in '%s' conf node: %s\n", | |
56518e71 SG |
233 | node_name, image_name, fdt_strerror(ret)); |
234 | return -1; | |
235 | } | |
236 | free(value); | |
237 | ||
238 | /* Get keyname again, as FDT has changed and invalidated our pointer */ | |
239 | info.keyname = fdt_getprop(fit, noffset, "key-name-hint", NULL); | |
240 | ||
241 | /* Write the public key into the supplied FDT file */ | |
242 | if (keydest && info.algo->add_verify_data(&info, keydest)) { | |
243 | printf("Failed to add verification data for '%s' signature node in '%s' image node\n", | |
244 | node_name, image_name); | |
245 | return -1; | |
246 | } | |
247 | ||
248 | return 0; | |
249 | } | |
250 | ||
251 | /** | |
252 | * fit_image_add_verification_data() - calculate/set verig. data for image node | |
253 | * | |
254 | * This adds hash and signature values for an component image node. | |
bbb467dc SG |
255 | * |
256 | * All existing hash subnodes are checked, if algorithm property is set to | |
257 | * one of the supported hash algorithms, hash value is computed and | |
258 | * corresponding hash node property is set, for example: | |
604f23dd SG |
259 | * |
260 | * Input component image node structure: | |
261 | * | |
262 | * o image@1 (at image_noffset) | |
263 | * | - data = [binary data] | |
264 | * o hash@1 | |
265 | * |- algo = "sha1" | |
266 | * | |
267 | * Output component image node structure: | |
268 | * | |
269 | * o image@1 (at image_noffset) | |
270 | * | - data = [binary data] | |
271 | * o hash@1 | |
272 | * |- algo = "sha1" | |
273 | * |- value = sha1(data) | |
274 | * | |
bbb467dc SG |
275 | * For signature details, please see doc/uImage.FIT/signature.txt |
276 | * | |
56518e71 SG |
277 | * @keydir Directory containing *.key and *.crt files (or NULL) |
278 | * @keydest FDT Blob to write public keys into (NULL if none) | |
bbb467dc SG |
279 | * @fit: Pointer to the FIT format image header |
280 | * @image_noffset: Requested component image node | |
56518e71 SG |
281 | * @comment: Comment to add to signature nodes |
282 | * @require_keys: Mark all keys as 'required' | |
bbb467dc | 283 | * @return: 0 on success, <0 on failure |
604f23dd | 284 | */ |
56518e71 SG |
285 | int fit_image_add_verification_data(const char *keydir, void *keydest, |
286 | void *fit, int image_noffset, const char *comment, | |
287 | int require_keys) | |
604f23dd | 288 | { |
bbb467dc | 289 | const char *image_name; |
604f23dd SG |
290 | const void *data; |
291 | size_t size; | |
604f23dd | 292 | int noffset; |
604f23dd SG |
293 | |
294 | /* Get image data and data length */ | |
295 | if (fit_image_get_data(fit, image_noffset, &data, &size)) { | |
296 | printf("Can't get image data/size\n"); | |
297 | return -1; | |
298 | } | |
299 | ||
94e5fa46 SG |
300 | image_name = fit_get_name(fit, image_noffset, NULL); |
301 | ||
604f23dd | 302 | /* Process all hash subnodes of the component image node */ |
bbb467dc SG |
303 | for (noffset = fdt_first_subnode(fit, image_noffset); |
304 | noffset >= 0; | |
305 | noffset = fdt_next_subnode(fit, noffset)) { | |
306 | const char *node_name; | |
307 | int ret = 0; | |
308 | ||
309 | /* | |
310 | * Check subnode name, must be equal to "hash" or "signature". | |
311 | * Multiple hash nodes require unique unit node | |
312 | * names, e.g. hash@1, hash@2, signature@1, etc. | |
313 | */ | |
314 | node_name = fit_get_name(fit, noffset, NULL); | |
315 | if (!strncmp(node_name, FIT_HASH_NODENAME, | |
316 | strlen(FIT_HASH_NODENAME))) { | |
317 | ret = fit_image_process_hash(fit, image_name, noffset, | |
318 | data, size); | |
56518e71 SG |
319 | } else if (IMAGE_ENABLE_SIGN && keydir && |
320 | !strncmp(node_name, FIT_SIG_NODENAME, | |
321 | strlen(FIT_SIG_NODENAME))) { | |
322 | ret = fit_image_process_sig(keydir, keydest, | |
323 | fit, image_name, noffset, data, size, | |
324 | comment, require_keys); | |
604f23dd | 325 | } |
bbb467dc | 326 | if (ret) |
1152a05e | 327 | return ret; |
bbb467dc SG |
328 | } |
329 | ||
330 | return 0; | |
331 | } | |
332 | ||
4d098529 SG |
333 | struct strlist { |
334 | int count; | |
335 | char **strings; | |
336 | }; | |
337 | ||
338 | static void strlist_init(struct strlist *list) | |
339 | { | |
340 | memset(list, '\0', sizeof(*list)); | |
341 | } | |
342 | ||
343 | static void strlist_free(struct strlist *list) | |
344 | { | |
345 | int i; | |
346 | ||
347 | for (i = 0; i < list->count; i++) | |
348 | free(list->strings[i]); | |
349 | free(list->strings); | |
350 | } | |
351 | ||
352 | static int strlist_add(struct strlist *list, const char *str) | |
353 | { | |
354 | char *dup; | |
355 | ||
356 | dup = strdup(str); | |
357 | list->strings = realloc(list->strings, | |
358 | (list->count + 1) * sizeof(char *)); | |
359 | if (!list || !str) | |
360 | return -1; | |
361 | list->strings[list->count++] = dup; | |
362 | ||
363 | return 0; | |
364 | } | |
365 | ||
366 | static const char *fit_config_get_image_list(void *fit, int noffset, | |
367 | int *lenp, int *allow_missingp) | |
368 | { | |
369 | static const char default_list[] = FIT_KERNEL_PROP "\0" | |
370 | FIT_FDT_PROP; | |
371 | const char *prop; | |
372 | ||
373 | /* If there is an "image" property, use that */ | |
374 | prop = fdt_getprop(fit, noffset, "sign-images", lenp); | |
375 | if (prop) { | |
376 | *allow_missingp = 0; | |
377 | return *lenp ? prop : NULL; | |
378 | } | |
379 | ||
380 | /* Default image list */ | |
381 | *allow_missingp = 1; | |
382 | *lenp = sizeof(default_list); | |
383 | ||
384 | return default_list; | |
385 | } | |
386 | ||
387 | static int fit_config_get_hash_list(void *fit, int conf_noffset, | |
388 | int sig_offset, struct strlist *node_inc) | |
389 | { | |
390 | int allow_missing; | |
391 | const char *prop, *iname, *end; | |
392 | const char *conf_name, *sig_name; | |
393 | char name[200], path[200]; | |
394 | int image_count; | |
395 | int ret, len; | |
396 | ||
397 | conf_name = fit_get_name(fit, conf_noffset, NULL); | |
398 | sig_name = fit_get_name(fit, sig_offset, NULL); | |
399 | ||
400 | /* | |
401 | * Build a list of nodes we need to hash. We always need the root | |
402 | * node and the configuration. | |
403 | */ | |
404 | strlist_init(node_inc); | |
405 | snprintf(name, sizeof(name), "%s/%s", FIT_CONFS_PATH, conf_name); | |
406 | if (strlist_add(node_inc, "/") || | |
407 | strlist_add(node_inc, name)) | |
408 | goto err_mem; | |
409 | ||
410 | /* Get a list of images that we intend to sign */ | |
66b36f83 | 411 | prop = fit_config_get_image_list(fit, sig_offset, &len, |
4d098529 SG |
412 | &allow_missing); |
413 | if (!prop) | |
414 | return 0; | |
415 | ||
416 | /* Locate the images */ | |
417 | end = prop + len; | |
418 | image_count = 0; | |
419 | for (iname = prop; iname < end; iname += strlen(iname) + 1) { | |
420 | int noffset; | |
421 | int image_noffset; | |
422 | int hash_count; | |
423 | ||
424 | image_noffset = fit_conf_get_prop_node(fit, conf_noffset, | |
425 | iname); | |
426 | if (image_noffset < 0) { | |
427 | printf("Failed to find image '%s' in configuration '%s/%s'\n", | |
428 | iname, conf_name, sig_name); | |
429 | if (allow_missing) | |
430 | continue; | |
431 | ||
432 | return -ENOENT; | |
433 | } | |
434 | ||
435 | ret = fdt_get_path(fit, image_noffset, path, sizeof(path)); | |
436 | if (ret < 0) | |
437 | goto err_path; | |
438 | if (strlist_add(node_inc, path)) | |
439 | goto err_mem; | |
440 | ||
441 | snprintf(name, sizeof(name), "%s/%s", FIT_CONFS_PATH, | |
442 | conf_name); | |
443 | ||
444 | /* Add all this image's hashes */ | |
445 | hash_count = 0; | |
446 | for (noffset = fdt_first_subnode(fit, image_noffset); | |
447 | noffset >= 0; | |
448 | noffset = fdt_next_subnode(fit, noffset)) { | |
449 | const char *name = fit_get_name(fit, noffset, NULL); | |
450 | ||
451 | if (strncmp(name, FIT_HASH_NODENAME, | |
452 | strlen(FIT_HASH_NODENAME))) | |
453 | continue; | |
454 | ret = fdt_get_path(fit, noffset, path, sizeof(path)); | |
455 | if (ret < 0) | |
456 | goto err_path; | |
457 | if (strlist_add(node_inc, path)) | |
458 | goto err_mem; | |
459 | hash_count++; | |
460 | } | |
461 | ||
462 | if (!hash_count) { | |
463 | printf("Failed to find any hash nodes in configuration '%s/%s' image '%s' - without these it is not possible to verify this image\n", | |
464 | conf_name, sig_name, iname); | |
465 | return -ENOMSG; | |
466 | } | |
467 | ||
468 | image_count++; | |
469 | } | |
470 | ||
471 | if (!image_count) { | |
472 | printf("Failed to find any images for configuration '%s/%s'\n", | |
473 | conf_name, sig_name); | |
474 | return -ENOMSG; | |
475 | } | |
476 | ||
477 | return 0; | |
478 | ||
479 | err_mem: | |
480 | printf("Out of memory processing configuration '%s/%s'\n", conf_name, | |
481 | sig_name); | |
482 | return -ENOMEM; | |
483 | ||
484 | err_path: | |
485 | printf("Failed to get path for image '%s' in configuration '%s/%s': %s\n", | |
486 | iname, conf_name, sig_name, fdt_strerror(ret)); | |
487 | return -ENOENT; | |
488 | } | |
489 | ||
490 | static int fit_config_get_data(void *fit, int conf_noffset, int noffset, | |
491 | struct image_region **regionp, int *region_countp, | |
492 | char **region_propp, int *region_proplen) | |
493 | { | |
494 | char * const exc_prop[] = {"data"}; | |
495 | struct strlist node_inc; | |
496 | struct image_region *region; | |
497 | struct fdt_region fdt_regions[100]; | |
498 | const char *conf_name, *sig_name; | |
499 | char path[200]; | |
500 | int count, i; | |
501 | char *region_prop; | |
502 | int ret, len; | |
503 | ||
504 | conf_name = fit_get_name(fit, conf_noffset, NULL); | |
505 | sig_name = fit_get_name(fit, conf_noffset, NULL); | |
506 | debug("%s: conf='%s', sig='%s'\n", __func__, conf_name, sig_name); | |
507 | ||
508 | /* Get a list of nodes we want to hash */ | |
509 | ret = fit_config_get_hash_list(fit, conf_noffset, noffset, &node_inc); | |
510 | if (ret) | |
511 | return ret; | |
512 | ||
513 | /* Get a list of regions to hash */ | |
514 | count = fdt_find_regions(fit, node_inc.strings, node_inc.count, | |
515 | exc_prop, ARRAY_SIZE(exc_prop), | |
516 | fdt_regions, ARRAY_SIZE(fdt_regions), | |
517 | path, sizeof(path), 1); | |
518 | if (count < 0) { | |
519 | printf("Failed to hash configuration '%s/%s': %s\n", conf_name, | |
520 | sig_name, fdt_strerror(ret)); | |
521 | return -EIO; | |
522 | } | |
523 | if (count == 0) { | |
524 | printf("No data to hash for configuration '%s/%s': %s\n", | |
525 | conf_name, sig_name, fdt_strerror(ret)); | |
526 | return -EINVAL; | |
527 | } | |
528 | ||
529 | /* Build our list of data blocks */ | |
530 | region = fit_region_make_list(fit, fdt_regions, count, NULL); | |
531 | if (!region) { | |
532 | printf("Out of memory hashing configuration '%s/%s'\n", | |
533 | conf_name, sig_name); | |
534 | return -ENOMEM; | |
535 | } | |
536 | ||
537 | /* Create a list of all hashed properties */ | |
538 | debug("Hash nodes:\n"); | |
539 | for (i = len = 0; i < node_inc.count; i++) { | |
540 | debug(" %s\n", node_inc.strings[i]); | |
541 | len += strlen(node_inc.strings[i]) + 1; | |
542 | } | |
543 | region_prop = malloc(len); | |
544 | if (!region_prop) { | |
545 | printf("Out of memory setting up regions for configuration '%s/%s'\n", | |
546 | conf_name, sig_name); | |
547 | return -ENOMEM; | |
548 | } | |
549 | for (i = len = 0; i < node_inc.count; | |
550 | len += strlen(node_inc.strings[i]) + 1, i++) | |
551 | strcpy(region_prop + len, node_inc.strings[i]); | |
552 | strlist_free(&node_inc); | |
553 | ||
554 | *region_countp = count; | |
555 | *regionp = region; | |
556 | *region_propp = region_prop; | |
557 | *region_proplen = len; | |
558 | ||
559 | return 0; | |
560 | } | |
561 | ||
562 | static int fit_config_process_sig(const char *keydir, void *keydest, | |
563 | void *fit, const char *conf_name, int conf_noffset, | |
564 | int noffset, const char *comment, int require_keys) | |
565 | { | |
566 | struct image_sign_info info; | |
567 | const char *node_name; | |
568 | struct image_region *region; | |
569 | char *region_prop; | |
570 | int region_proplen; | |
571 | int region_count; | |
572 | uint8_t *value; | |
573 | uint value_len; | |
574 | int ret; | |
575 | ||
576 | node_name = fit_get_name(fit, noffset, NULL); | |
577 | if (fit_config_get_data(fit, conf_noffset, noffset, ®ion, | |
578 | ®ion_count, ®ion_prop, ®ion_proplen)) | |
579 | return -1; | |
580 | ||
581 | if (fit_image_setup_sig(&info, keydir, fit, conf_name, noffset, | |
582 | require_keys ? "conf" : NULL)) | |
583 | return -1; | |
584 | ||
585 | ret = info.algo->sign(&info, region, region_count, &value, &value_len); | |
586 | free(region); | |
587 | if (ret) { | |
588 | printf("Failed to sign '%s' signature node in '%s' conf node\n", | |
589 | node_name, conf_name); | |
590 | ||
591 | /* We allow keys to be missing */ | |
592 | if (ret == -ENOENT) | |
593 | return 0; | |
594 | return -1; | |
595 | } | |
596 | ||
a9468115 SG |
597 | ret = fit_image_write_sig(fit, noffset, value, value_len, comment, |
598 | region_prop, region_proplen); | |
599 | if (ret) { | |
600 | if (ret == -FDT_ERR_NOSPACE) | |
601 | return -ENOSPC; | |
602 | printf("Can't write signature for '%s' signature node in '%s' conf node: %s\n", | |
603 | node_name, conf_name, fdt_strerror(ret)); | |
4d098529 SG |
604 | return -1; |
605 | } | |
606 | free(value); | |
607 | free(region_prop); | |
608 | ||
609 | /* Get keyname again, as FDT has changed and invalidated our pointer */ | |
610 | info.keyname = fdt_getprop(fit, noffset, "key-name-hint", NULL); | |
611 | ||
612 | /* Write the public key into the supplied FDT file */ | |
a9468115 SG |
613 | if (keydest) { |
614 | ret = info.algo->add_verify_data(&info, keydest); | |
597a8b2c SG |
615 | if (ret == -ENOSPC) |
616 | return -ENOSPC; | |
a9468115 SG |
617 | if (ret) { |
618 | printf("Failed to add verification data for '%s' signature node in '%s' image node\n", | |
619 | node_name, conf_name); | |
a9468115 | 620 | } |
597a8b2c | 621 | return ret; |
4d098529 SG |
622 | } |
623 | ||
624 | return 0; | |
625 | } | |
626 | ||
627 | static int fit_config_add_verification_data(const char *keydir, void *keydest, | |
628 | void *fit, int conf_noffset, const char *comment, | |
629 | int require_keys) | |
630 | { | |
631 | const char *conf_name; | |
632 | int noffset; | |
633 | ||
634 | conf_name = fit_get_name(fit, conf_noffset, NULL); | |
635 | ||
636 | /* Process all hash subnodes of the configuration node */ | |
637 | for (noffset = fdt_first_subnode(fit, conf_noffset); | |
638 | noffset >= 0; | |
639 | noffset = fdt_next_subnode(fit, noffset)) { | |
640 | const char *node_name; | |
641 | int ret = 0; | |
642 | ||
643 | node_name = fit_get_name(fit, noffset, NULL); | |
644 | if (!strncmp(node_name, FIT_SIG_NODENAME, | |
645 | strlen(FIT_SIG_NODENAME))) { | |
646 | ret = fit_config_process_sig(keydir, keydest, | |
647 | fit, conf_name, conf_noffset, noffset, comment, | |
648 | require_keys); | |
649 | } | |
650 | if (ret) | |
651 | return ret; | |
652 | } | |
653 | ||
654 | return 0; | |
655 | } | |
656 | ||
56518e71 SG |
657 | int fit_add_verification_data(const char *keydir, void *keydest, void *fit, |
658 | const char *comment, int require_keys) | |
bbb467dc | 659 | { |
4d098529 | 660 | int images_noffset, confs_noffset; |
bbb467dc SG |
661 | int noffset; |
662 | int ret; | |
663 | ||
664 | /* Find images parent node offset */ | |
665 | images_noffset = fdt_path_offset(fit, FIT_IMAGES_PATH); | |
666 | if (images_noffset < 0) { | |
667 | printf("Can't find images parent node '%s' (%s)\n", | |
668 | FIT_IMAGES_PATH, fdt_strerror(images_noffset)); | |
669 | return images_noffset; | |
670 | } | |
671 | ||
672 | /* Process its subnodes, print out component images details */ | |
673 | for (noffset = fdt_first_subnode(fit, images_noffset); | |
674 | noffset >= 0; | |
675 | noffset = fdt_next_subnode(fit, noffset)) { | |
676 | /* | |
677 | * Direct child node of the images parent node, | |
678 | * i.e. component image node. | |
679 | */ | |
56518e71 SG |
680 | ret = fit_image_add_verification_data(keydir, keydest, |
681 | fit, noffset, comment, require_keys); | |
bbb467dc SG |
682 | if (ret) |
683 | return ret; | |
604f23dd SG |
684 | } |
685 | ||
4d098529 SG |
686 | /* If there are no keys, we can't sign configurations */ |
687 | if (!IMAGE_ENABLE_SIGN || !keydir) | |
688 | return 0; | |
689 | ||
690 | /* Find configurations parent node offset */ | |
691 | confs_noffset = fdt_path_offset(fit, FIT_CONFS_PATH); | |
692 | if (confs_noffset < 0) { | |
693 | printf("Can't find images parent node '%s' (%s)\n", | |
04a710a5 | 694 | FIT_CONFS_PATH, fdt_strerror(confs_noffset)); |
4d098529 SG |
695 | return -ENOENT; |
696 | } | |
697 | ||
698 | /* Process its subnodes, print out component images details */ | |
699 | for (noffset = fdt_first_subnode(fit, confs_noffset); | |
700 | noffset >= 0; | |
701 | noffset = fdt_next_subnode(fit, noffset)) { | |
702 | ret = fit_config_add_verification_data(keydir, keydest, | |
703 | fit, noffset, comment, | |
704 | require_keys); | |
705 | if (ret) | |
706 | return ret; | |
707 | } | |
708 | ||
604f23dd SG |
709 | return 0; |
710 | } | |
29a23f9d HS |
711 | |
712 | #ifdef CONFIG_FIT_SIGNATURE | |
ce1400f6 | 713 | int fit_check_sign(const void *fit, const void *key) |
29a23f9d HS |
714 | { |
715 | int cfg_noffset; | |
716 | int ret; | |
717 | ||
ce1400f6 | 718 | cfg_noffset = fit_conf_get_node(fit, NULL); |
29a23f9d HS |
719 | if (!cfg_noffset) |
720 | return -1; | |
721 | ||
ce1400f6 SG |
722 | printf("Verifying Hash Integrity ... "); |
723 | ret = fit_config_verify(fit, cfg_noffset); | |
724 | if (ret) | |
725 | return ret; | |
726 | ret = bootm_host_load_images(fit, cfg_noffset); | |
727 | ||
29a23f9d HS |
728 | return ret; |
729 | } | |
730 | #endif |