blob: 2c0030b5e23ef076c9fb48ce821982708486c873 [file] [log] [blame]
Simon Glass604f23d2013-05-07 06:11:54 +00001/*
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 *
Wolfgang Denk1a459662013-07-08 09:37:19 +02009 * SPDX-License-Identifier: GPL-2.0+
Simon Glass604f23d2013-05-07 06:11:54 +000010 */
11
12#include "mkimage.h"
Simon Glassce1400f2014-06-12 07:24:53 -060013#include <bootm.h>
Simon Glass604f23d2013-05-07 06:11:54 +000014#include <image.h>
Simon Glass56518e72013-06-13 15:10:01 -070015#include <version.h>
Simon Glass604f23d2013-05-07 06:11:54 +000016
17/**
Simon Glassb7260912013-05-07 06:11:56 +000018 * 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 */
31static 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));
Simon Glass1152a052016-07-03 09:40:44 -060041 return ret == -FDT_ERR_NOSPACE ? -ENOSPC : -EIO;
Simon Glassb7260912013-05-07 06:11:56 +000042 }
43
44 return 0;
45}
46
47/**
Simon Glass94e5fa42013-05-07 06:11:55 +000048 * 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 */
60static 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];
Simon Glassbbb467d2013-05-07 06:12:01 +000064 const char *node_name;
Simon Glass94e5fa42013-05-07 06:11:55 +000065 int value_len;
66 char *algo;
Simon Glass1152a052016-07-03 09:40:44 -060067 int ret;
Simon Glass94e5fa42013-05-07 06:11:55 +000068
Simon Glassbbb467d2013-05-07 06:12:01 +000069 node_name = fit_get_name(fit, noffset, NULL);
Simon Glass94e5fa42013-05-07 06:11:55 +000070
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",
Simon Glassbbb467d2013-05-07 06:12:01 +000073 node_name, image_name);
Simon Glass1152a052016-07-03 09:40:44 -060074 return -ENOENT;
Simon Glass94e5fa42013-05-07 06:11:55 +000075 }
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",
Simon Glassbbb467d2013-05-07 06:12:01 +000079 algo, node_name, image_name);
Simon Glass1152a052016-07-03 09:40:44 -060080 return -EPROTONOSUPPORT;
Simon Glass94e5fa42013-05-07 06:11:55 +000081 }
82
Simon Glass1152a052016-07-03 09:40:44 -060083 ret = fit_set_hash_value(fit, noffset, value, value_len);
84 if (ret) {
Simon Glass94e5fa42013-05-07 06:11:55 +000085 printf("Can't set hash value for '%s' hash node in '%s' image node\n",
Simon Glassbbb467d2013-05-07 06:12:01 +000086 node_name, image_name);
Simon Glass1152a052016-07-03 09:40:44 -060087 return ret;
Simon Glass94e5fa42013-05-07 06:11:55 +000088 }
89
90 return 0;
91}
92
93/**
Simon Glass56518e72013-06-13 15:10:01 -070094 * fit_image_write_sig() - write the signature to a FIT
Simon Glass604f23d2013-05-07 06:11:54 +000095 *
Simon Glass56518e72013-06-13 15:10:01 -070096 * 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 */
108static 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
150static int fit_image_setup_sig(struct image_sign_info *info,
151 const char *keydir, void *fit, const char *image_name,
George McCollisterf1ca1fd2017-01-06 13:14:17 -0600152 int noffset, const char *require_keys, const char *engine_id)
Simon Glass56518e72013-06-13 15:10:01 -0700153{
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;
Masahiro Yamada1d88a992017-10-27 13:25:21 +0900169 info->name = strdup(algo_name);
Andrew Duda83dd98e2016-11-08 18:53:41 +0000170 info->checksum = image_get_checksum_algo(algo_name);
171 info->crypto = image_get_crypto_algo(algo_name);
Simon Glass56518e72013-06-13 15:10:01 -0700172 info->require_keys = require_keys;
George McCollisterf1ca1fd2017-01-06 13:14:17 -0600173 info->engine_id = engine_id;
Andrew Duda83dd98e2016-11-08 18:53:41 +0000174 if (!info->checksum || !info->crypto) {
Simon Glass56518e72013-06-13 15:10:01 -0700175 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'
George McCollisterf1ca1fd2017-01-06 13:14:17 -0600198 * @engine_id: Engine to use for signing
Simon Glass56518e72013-06-13 15:10:01 -0700199 * @return 0 if ok, -1 on error
200 */
201static 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,
George McCollisterf1ca1fd2017-01-06 13:14:17 -0600204 const char *comment, int require_keys, const char *engine_id)
Simon Glass56518e72013-06-13 15:10:01 -0700205{
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,
George McCollisterf1ca1fd2017-01-06 13:14:17 -0600214 require_keys ? "image" : NULL, engine_id))
Simon Glass56518e72013-06-13 15:10:01 -0700215 return -1;
216
217 node_name = fit_get_name(fit, noffset, NULL);
218 region.data = data;
219 region.size = size;
Andrew Duda83dd98e2016-11-08 18:53:41 +0000220 ret = info.crypto->sign(&info, &region, 1, &value, &value_len);
Simon Glass56518e72013-06-13 15:10:01 -0700221 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) {
Simon Glassa9468112014-06-02 22:04:53 -0600234 if (ret == -FDT_ERR_NOSPACE)
235 return -ENOSPC;
236 printf("Can't write signature for '%s' signature node in '%s' conf node: %s\n",
Simon Glass56518e72013-06-13 15:10:01 -0700237 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
mario.six@gdsys.cc713fb2d2016-07-22 08:58:40 +0200245 /*
246 * Write the public key into the supplied FDT file; this might fail
mario.six@gdsys.ccc236ebd2016-07-19 11:07:06 +0200247 * several times, since we try signing with successively increasing
mario.six@gdsys.cc713fb2d2016-07-22 08:58:40 +0200248 * size values
249 */
Masahiro Yamada6793d012017-10-27 15:04:20 +0900250 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 }
Simon Glass56518e72013-06-13 15:10:01 -0700258
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.
Simon Glassbbb467d2013-05-07 06:12:01 +0000266 *
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:
Simon Glass604f23d2013-05-07 06:11:54 +0000270 *
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 *
Simon Glassbbb467d2013-05-07 06:12:01 +0000286 * For signature details, please see doc/uImage.FIT/signature.txt
287 *
Simon Glass56518e72013-06-13 15:10:01 -0700288 * @keydir Directory containing *.key and *.crt files (or NULL)
289 * @keydest FDT Blob to write public keys into (NULL if none)
Simon Glassbbb467d2013-05-07 06:12:01 +0000290 * @fit: Pointer to the FIT format image header
291 * @image_noffset: Requested component image node
Simon Glass56518e72013-06-13 15:10:01 -0700292 * @comment: Comment to add to signature nodes
293 * @require_keys: Mark all keys as 'required'
George McCollisterf1ca1fd2017-01-06 13:14:17 -0600294 * @engine_id: Engine to use for signing
Simon Glassbbb467d2013-05-07 06:12:01 +0000295 * @return: 0 on success, <0 on failure
Simon Glass604f23d2013-05-07 06:11:54 +0000296 */
Simon Glass56518e72013-06-13 15:10:01 -0700297int fit_image_add_verification_data(const char *keydir, void *keydest,
298 void *fit, int image_noffset, const char *comment,
George McCollisterf1ca1fd2017-01-06 13:14:17 -0600299 int require_keys, const char *engine_id)
Simon Glass604f23d2013-05-07 06:11:54 +0000300{
Simon Glassbbb467d2013-05-07 06:12:01 +0000301 const char *image_name;
Simon Glass604f23d2013-05-07 06:11:54 +0000302 const void *data;
303 size_t size;
Simon Glass604f23d2013-05-07 06:11:54 +0000304 int noffset;
Simon Glass604f23d2013-05-07 06:11:54 +0000305
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
Simon Glass94e5fa42013-05-07 06:11:55 +0000312 image_name = fit_get_name(fit, image_noffset, NULL);
313
Simon Glass604f23d2013-05-07 06:11:54 +0000314 /* Process all hash subnodes of the component image node */
Simon Glassbbb467d2013-05-07 06:12:01 +0000315 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);
Simon Glass56518e72013-06-13 15:10:01 -0700331 } 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,
George McCollisterf1ca1fd2017-01-06 13:14:17 -0600336 comment, require_keys, engine_id);
Simon Glass604f23d2013-05-07 06:11:54 +0000337 }
Simon Glassbbb467d2013-05-07 06:12:01 +0000338 if (ret)
Simon Glass1152a052016-07-03 09:40:44 -0600339 return ret;
Simon Glassbbb467d2013-05-07 06:12:01 +0000340 }
341
342 return 0;
343}
344
Simon Glass4d098522013-06-13 15:10:09 -0700345struct strlist {
346 int count;
347 char **strings;
348};
349
350static void strlist_init(struct strlist *list)
351{
352 memset(list, '\0', sizeof(*list));
353}
354
355static 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
364static 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
378static 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
399static 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 */
Heiko Schocher66b36f82014-03-03 12:19:23 +0100423 prop = fit_config_get_image_list(fit, sig_offset, &len,
Simon Glass4d098522013-06-13 15:10:09 -0700424 &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
491err_mem:
492 printf("Out of memory processing configuration '%s/%s'\n", conf_name,
493 sig_name);
494 return -ENOMEM;
495
496err_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
502static 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);
Masahiro Yamada16067e62017-10-19 19:16:21 +0900517 sig_name = fit_get_name(fit, noffset, NULL);
Simon Glass4d098522013-06-13 15:10:09 -0700518 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
574static int fit_config_process_sig(const char *keydir, void *keydest,
575 void *fit, const char *conf_name, int conf_noffset,
George McCollisterf1ca1fd2017-01-06 13:14:17 -0600576 int noffset, const char *comment, int require_keys,
577 const char *engine_id)
Simon Glass4d098522013-06-13 15:10:09 -0700578{
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, &region,
591 &region_count, &region_prop, &region_proplen))
592 return -1;
593
594 if (fit_image_setup_sig(&info, keydir, fit, conf_name, noffset,
George McCollisterf1ca1fd2017-01-06 13:14:17 -0600595 require_keys ? "conf" : NULL, engine_id))
Simon Glass4d098522013-06-13 15:10:09 -0700596 return -1;
597
Andrew Duda83dd98e2016-11-08 18:53:41 +0000598 ret = info.crypto->sign(&info, region, region_count, &value,
599 &value_len);
Simon Glass4d098522013-06-13 15:10:09 -0700600 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
Simon Glassa9468112014-06-02 22:04:53 -0600611 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));
Simon Glass4d098522013-06-13 15:10:09 -0700618 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 */
Simon Glassa9468112014-06-02 22:04:53 -0600627 if (keydest) {
Andrew Duda83dd98e2016-11-08 18:53:41 +0000628 ret = info.crypto->add_verify_data(&info, keydest);
Simon Glassa9468112014-06-02 22:04:53 -0600629 if (ret) {
Masahiro Yamada76b9cba2017-10-27 15:04:21 +0900630 printf("Failed to add verification data for '%s' signature node in '%s' configuration node\n",
Simon Glassa9468112014-06-02 22:04:53 -0600631 node_name, conf_name);
Simon Glassa9468112014-06-02 22:04:53 -0600632 }
Simon Glass597a8b22014-06-12 07:24:42 -0600633 return ret;
Simon Glass4d098522013-06-13 15:10:09 -0700634 }
635
636 return 0;
637}
638
639static int fit_config_add_verification_data(const char *keydir, void *keydest,
640 void *fit, int conf_noffset, const char *comment,
George McCollisterf1ca1fd2017-01-06 13:14:17 -0600641 int require_keys, const char *engine_id)
Simon Glass4d098522013-06-13 15:10:09 -0700642{
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,
George McCollisterf1ca1fd2017-01-06 13:14:17 -0600660 require_keys, engine_id);
Simon Glass4d098522013-06-13 15:10:09 -0700661 }
662 if (ret)
663 return ret;
664 }
665
666 return 0;
667}
668
Simon Glass56518e72013-06-13 15:10:01 -0700669int fit_add_verification_data(const char *keydir, void *keydest, void *fit,
George McCollisterf1ca1fd2017-01-06 13:14:17 -0600670 const char *comment, int require_keys,
671 const char *engine_id)
Simon Glassbbb467d2013-05-07 06:12:01 +0000672{
Simon Glass4d098522013-06-13 15:10:09 -0700673 int images_noffset, confs_noffset;
Simon Glassbbb467d2013-05-07 06:12:01 +0000674 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 */
Simon Glass56518e72013-06-13 15:10:01 -0700693 ret = fit_image_add_verification_data(keydir, keydest,
George McCollisterf1ca1fd2017-01-06 13:14:17 -0600694 fit, noffset, comment, require_keys, engine_id);
Simon Glassbbb467d2013-05-07 06:12:01 +0000695 if (ret)
696 return ret;
Simon Glass604f23d2013-05-07 06:11:54 +0000697 }
698
Simon Glass4d098522013-06-13 15:10:09 -0700699 /* 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",
Heiko Schocher04a710a2014-08-11 11:02:17 +0200707 FIT_CONFS_PATH, fdt_strerror(confs_noffset));
Simon Glass4d098522013-06-13 15:10:09 -0700708 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,
George McCollisterf1ca1fd2017-01-06 13:14:17 -0600717 require_keys,
718 engine_id);
Simon Glass4d098522013-06-13 15:10:09 -0700719 if (ret)
720 return ret;
721 }
722
Simon Glass604f23d2013-05-07 06:11:54 +0000723 return 0;
724}
Heiko Schocher29a23f92014-03-03 12:19:30 +0100725
726#ifdef CONFIG_FIT_SIGNATURE
Simon Glassce1400f2014-06-12 07:24:53 -0600727int fit_check_sign(const void *fit, const void *key)
Heiko Schocher29a23f92014-03-03 12:19:30 +0100728{
729 int cfg_noffset;
730 int ret;
731
Simon Glassce1400f2014-06-12 07:24:53 -0600732 cfg_noffset = fit_conf_get_node(fit, NULL);
Heiko Schocher29a23f92014-03-03 12:19:30 +0100733 if (!cfg_noffset)
734 return -1;
735
Simon Glassce1400f2014-06-12 07:24:53 -0600736 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
Heiko Schocher29a23f92014-03-03 12:19:30 +0100742 return ret;
743}
744#endif