blob: 5e4d690714160dcd68932f8eb6cf728640532ea6 [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;
Andrew Duda83dd98e2016-11-08 18:53:41 +0000169 info->name = algo_name;
170 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 if (keydest)
Andrew Duda83dd98e2016-11-08 18:53:41 +0000246 ret = info.crypto->add_verify_data(&info, keydest);
mario.six@gdsys.cc713fb2d2016-07-22 08:58:40 +0200247 else
248 return -1;
mario.six@gdsys.ccc236ebd2016-07-19 11:07:06 +0200249
mario.six@gdsys.cc713fb2d2016-07-22 08:58:40 +0200250 /*
251 * Write the public key into the supplied FDT file; this might fail
mario.six@gdsys.ccc236ebd2016-07-19 11:07:06 +0200252 * several times, since we try signing with successively increasing
mario.six@gdsys.cc713fb2d2016-07-22 08:58:40 +0200253 * size values
254 */
mario.six@gdsys.ccc236ebd2016-07-19 11:07:06 +0200255 if (keydest && ret)
256 return ret;
Simon Glass56518e72013-06-13 15:10:01 -0700257
258 return 0;
259}
260
261/**
262 * fit_image_add_verification_data() - calculate/set verig. data for image node
263 *
264 * This adds hash and signature values for an component image node.
Simon Glassbbb467d2013-05-07 06:12:01 +0000265 *
266 * All existing hash subnodes are checked, if algorithm property is set to
267 * one of the supported hash algorithms, hash value is computed and
268 * corresponding hash node property is set, for example:
Simon Glass604f23d2013-05-07 06:11:54 +0000269 *
270 * Input component image node structure:
271 *
272 * o image@1 (at image_noffset)
273 * | - data = [binary data]
274 * o hash@1
275 * |- algo = "sha1"
276 *
277 * Output component image node structure:
278 *
279 * o image@1 (at image_noffset)
280 * | - data = [binary data]
281 * o hash@1
282 * |- algo = "sha1"
283 * |- value = sha1(data)
284 *
Simon Glassbbb467d2013-05-07 06:12:01 +0000285 * For signature details, please see doc/uImage.FIT/signature.txt
286 *
Simon Glass56518e72013-06-13 15:10:01 -0700287 * @keydir Directory containing *.key and *.crt files (or NULL)
288 * @keydest FDT Blob to write public keys into (NULL if none)
Simon Glassbbb467d2013-05-07 06:12:01 +0000289 * @fit: Pointer to the FIT format image header
290 * @image_noffset: Requested component image node
Simon Glass56518e72013-06-13 15:10:01 -0700291 * @comment: Comment to add to signature nodes
292 * @require_keys: Mark all keys as 'required'
George McCollisterf1ca1fd2017-01-06 13:14:17 -0600293 * @engine_id: Engine to use for signing
Simon Glassbbb467d2013-05-07 06:12:01 +0000294 * @return: 0 on success, <0 on failure
Simon Glass604f23d2013-05-07 06:11:54 +0000295 */
Simon Glass56518e72013-06-13 15:10:01 -0700296int fit_image_add_verification_data(const char *keydir, void *keydest,
297 void *fit, int image_noffset, const char *comment,
George McCollisterf1ca1fd2017-01-06 13:14:17 -0600298 int require_keys, const char *engine_id)
Simon Glass604f23d2013-05-07 06:11:54 +0000299{
Simon Glassbbb467d2013-05-07 06:12:01 +0000300 const char *image_name;
Simon Glass604f23d2013-05-07 06:11:54 +0000301 const void *data;
302 size_t size;
Simon Glass604f23d2013-05-07 06:11:54 +0000303 int noffset;
Simon Glass604f23d2013-05-07 06:11:54 +0000304
305 /* Get image data and data length */
306 if (fit_image_get_data(fit, image_noffset, &data, &size)) {
307 printf("Can't get image data/size\n");
308 return -1;
309 }
310
Simon Glass94e5fa42013-05-07 06:11:55 +0000311 image_name = fit_get_name(fit, image_noffset, NULL);
312
Simon Glass604f23d2013-05-07 06:11:54 +0000313 /* Process all hash subnodes of the component image node */
Simon Glassbbb467d2013-05-07 06:12:01 +0000314 for (noffset = fdt_first_subnode(fit, image_noffset);
315 noffset >= 0;
316 noffset = fdt_next_subnode(fit, noffset)) {
317 const char *node_name;
318 int ret = 0;
319
320 /*
321 * Check subnode name, must be equal to "hash" or "signature".
322 * Multiple hash nodes require unique unit node
323 * names, e.g. hash@1, hash@2, signature@1, etc.
324 */
325 node_name = fit_get_name(fit, noffset, NULL);
326 if (!strncmp(node_name, FIT_HASH_NODENAME,
327 strlen(FIT_HASH_NODENAME))) {
328 ret = fit_image_process_hash(fit, image_name, noffset,
329 data, size);
Simon Glass56518e72013-06-13 15:10:01 -0700330 } else if (IMAGE_ENABLE_SIGN && keydir &&
331 !strncmp(node_name, FIT_SIG_NODENAME,
332 strlen(FIT_SIG_NODENAME))) {
333 ret = fit_image_process_sig(keydir, keydest,
334 fit, image_name, noffset, data, size,
George McCollisterf1ca1fd2017-01-06 13:14:17 -0600335 comment, require_keys, engine_id);
Simon Glass604f23d2013-05-07 06:11:54 +0000336 }
Simon Glassbbb467d2013-05-07 06:12:01 +0000337 if (ret)
Simon Glass1152a052016-07-03 09:40:44 -0600338 return ret;
Simon Glassbbb467d2013-05-07 06:12:01 +0000339 }
340
341 return 0;
342}
343
Simon Glass4d098522013-06-13 15:10:09 -0700344struct strlist {
345 int count;
346 char **strings;
347};
348
349static void strlist_init(struct strlist *list)
350{
351 memset(list, '\0', sizeof(*list));
352}
353
354static void strlist_free(struct strlist *list)
355{
356 int i;
357
358 for (i = 0; i < list->count; i++)
359 free(list->strings[i]);
360 free(list->strings);
361}
362
363static int strlist_add(struct strlist *list, const char *str)
364{
365 char *dup;
366
367 dup = strdup(str);
368 list->strings = realloc(list->strings,
369 (list->count + 1) * sizeof(char *));
370 if (!list || !str)
371 return -1;
372 list->strings[list->count++] = dup;
373
374 return 0;
375}
376
377static const char *fit_config_get_image_list(void *fit, int noffset,
378 int *lenp, int *allow_missingp)
379{
380 static const char default_list[] = FIT_KERNEL_PROP "\0"
381 FIT_FDT_PROP;
382 const char *prop;
383
384 /* If there is an "image" property, use that */
385 prop = fdt_getprop(fit, noffset, "sign-images", lenp);
386 if (prop) {
387 *allow_missingp = 0;
388 return *lenp ? prop : NULL;
389 }
390
391 /* Default image list */
392 *allow_missingp = 1;
393 *lenp = sizeof(default_list);
394
395 return default_list;
396}
397
398static int fit_config_get_hash_list(void *fit, int conf_noffset,
399 int sig_offset, struct strlist *node_inc)
400{
401 int allow_missing;
402 const char *prop, *iname, *end;
403 const char *conf_name, *sig_name;
404 char name[200], path[200];
405 int image_count;
406 int ret, len;
407
408 conf_name = fit_get_name(fit, conf_noffset, NULL);
409 sig_name = fit_get_name(fit, sig_offset, NULL);
410
411 /*
412 * Build a list of nodes we need to hash. We always need the root
413 * node and the configuration.
414 */
415 strlist_init(node_inc);
416 snprintf(name, sizeof(name), "%s/%s", FIT_CONFS_PATH, conf_name);
417 if (strlist_add(node_inc, "/") ||
418 strlist_add(node_inc, name))
419 goto err_mem;
420
421 /* Get a list of images that we intend to sign */
Heiko Schocher66b36f82014-03-03 12:19:23 +0100422 prop = fit_config_get_image_list(fit, sig_offset, &len,
Simon Glass4d098522013-06-13 15:10:09 -0700423 &allow_missing);
424 if (!prop)
425 return 0;
426
427 /* Locate the images */
428 end = prop + len;
429 image_count = 0;
430 for (iname = prop; iname < end; iname += strlen(iname) + 1) {
431 int noffset;
432 int image_noffset;
433 int hash_count;
434
435 image_noffset = fit_conf_get_prop_node(fit, conf_noffset,
436 iname);
437 if (image_noffset < 0) {
438 printf("Failed to find image '%s' in configuration '%s/%s'\n",
439 iname, conf_name, sig_name);
440 if (allow_missing)
441 continue;
442
443 return -ENOENT;
444 }
445
446 ret = fdt_get_path(fit, image_noffset, path, sizeof(path));
447 if (ret < 0)
448 goto err_path;
449 if (strlist_add(node_inc, path))
450 goto err_mem;
451
452 snprintf(name, sizeof(name), "%s/%s", FIT_CONFS_PATH,
453 conf_name);
454
455 /* Add all this image's hashes */
456 hash_count = 0;
457 for (noffset = fdt_first_subnode(fit, image_noffset);
458 noffset >= 0;
459 noffset = fdt_next_subnode(fit, noffset)) {
460 const char *name = fit_get_name(fit, noffset, NULL);
461
462 if (strncmp(name, FIT_HASH_NODENAME,
463 strlen(FIT_HASH_NODENAME)))
464 continue;
465 ret = fdt_get_path(fit, noffset, path, sizeof(path));
466 if (ret < 0)
467 goto err_path;
468 if (strlist_add(node_inc, path))
469 goto err_mem;
470 hash_count++;
471 }
472
473 if (!hash_count) {
474 printf("Failed to find any hash nodes in configuration '%s/%s' image '%s' - without these it is not possible to verify this image\n",
475 conf_name, sig_name, iname);
476 return -ENOMSG;
477 }
478
479 image_count++;
480 }
481
482 if (!image_count) {
483 printf("Failed to find any images for configuration '%s/%s'\n",
484 conf_name, sig_name);
485 return -ENOMSG;
486 }
487
488 return 0;
489
490err_mem:
491 printf("Out of memory processing configuration '%s/%s'\n", conf_name,
492 sig_name);
493 return -ENOMEM;
494
495err_path:
496 printf("Failed to get path for image '%s' in configuration '%s/%s': %s\n",
497 iname, conf_name, sig_name, fdt_strerror(ret));
498 return -ENOENT;
499}
500
501static int fit_config_get_data(void *fit, int conf_noffset, int noffset,
502 struct image_region **regionp, int *region_countp,
503 char **region_propp, int *region_proplen)
504{
505 char * const exc_prop[] = {"data"};
506 struct strlist node_inc;
507 struct image_region *region;
508 struct fdt_region fdt_regions[100];
509 const char *conf_name, *sig_name;
510 char path[200];
511 int count, i;
512 char *region_prop;
513 int ret, len;
514
515 conf_name = fit_get_name(fit, conf_noffset, NULL);
516 sig_name = fit_get_name(fit, conf_noffset, NULL);
517 debug("%s: conf='%s', sig='%s'\n", __func__, conf_name, sig_name);
518
519 /* Get a list of nodes we want to hash */
520 ret = fit_config_get_hash_list(fit, conf_noffset, noffset, &node_inc);
521 if (ret)
522 return ret;
523
524 /* Get a list of regions to hash */
525 count = fdt_find_regions(fit, node_inc.strings, node_inc.count,
526 exc_prop, ARRAY_SIZE(exc_prop),
527 fdt_regions, ARRAY_SIZE(fdt_regions),
528 path, sizeof(path), 1);
529 if (count < 0) {
530 printf("Failed to hash configuration '%s/%s': %s\n", conf_name,
531 sig_name, fdt_strerror(ret));
532 return -EIO;
533 }
534 if (count == 0) {
535 printf("No data to hash for configuration '%s/%s': %s\n",
536 conf_name, sig_name, fdt_strerror(ret));
537 return -EINVAL;
538 }
539
540 /* Build our list of data blocks */
541 region = fit_region_make_list(fit, fdt_regions, count, NULL);
542 if (!region) {
543 printf("Out of memory hashing configuration '%s/%s'\n",
544 conf_name, sig_name);
545 return -ENOMEM;
546 }
547
548 /* Create a list of all hashed properties */
549 debug("Hash nodes:\n");
550 for (i = len = 0; i < node_inc.count; i++) {
551 debug(" %s\n", node_inc.strings[i]);
552 len += strlen(node_inc.strings[i]) + 1;
553 }
554 region_prop = malloc(len);
555 if (!region_prop) {
556 printf("Out of memory setting up regions for configuration '%s/%s'\n",
557 conf_name, sig_name);
558 return -ENOMEM;
559 }
560 for (i = len = 0; i < node_inc.count;
561 len += strlen(node_inc.strings[i]) + 1, i++)
562 strcpy(region_prop + len, node_inc.strings[i]);
563 strlist_free(&node_inc);
564
565 *region_countp = count;
566 *regionp = region;
567 *region_propp = region_prop;
568 *region_proplen = len;
569
570 return 0;
571}
572
573static int fit_config_process_sig(const char *keydir, void *keydest,
574 void *fit, const char *conf_name, int conf_noffset,
George McCollisterf1ca1fd2017-01-06 13:14:17 -0600575 int noffset, const char *comment, int require_keys,
576 const char *engine_id)
Simon Glass4d098522013-06-13 15:10:09 -0700577{
578 struct image_sign_info info;
579 const char *node_name;
580 struct image_region *region;
581 char *region_prop;
582 int region_proplen;
583 int region_count;
584 uint8_t *value;
585 uint value_len;
586 int ret;
587
588 node_name = fit_get_name(fit, noffset, NULL);
589 if (fit_config_get_data(fit, conf_noffset, noffset, &region,
590 &region_count, &region_prop, &region_proplen))
591 return -1;
592
593 if (fit_image_setup_sig(&info, keydir, fit, conf_name, noffset,
George McCollisterf1ca1fd2017-01-06 13:14:17 -0600594 require_keys ? "conf" : NULL, engine_id))
Simon Glass4d098522013-06-13 15:10:09 -0700595 return -1;
596
Andrew Duda83dd98e2016-11-08 18:53:41 +0000597 ret = info.crypto->sign(&info, region, region_count, &value,
598 &value_len);
Simon Glass4d098522013-06-13 15:10:09 -0700599 free(region);
600 if (ret) {
601 printf("Failed to sign '%s' signature node in '%s' conf node\n",
602 node_name, conf_name);
603
604 /* We allow keys to be missing */
605 if (ret == -ENOENT)
606 return 0;
607 return -1;
608 }
609
Simon Glassa9468112014-06-02 22:04:53 -0600610 ret = fit_image_write_sig(fit, noffset, value, value_len, comment,
611 region_prop, region_proplen);
612 if (ret) {
613 if (ret == -FDT_ERR_NOSPACE)
614 return -ENOSPC;
615 printf("Can't write signature for '%s' signature node in '%s' conf node: %s\n",
616 node_name, conf_name, fdt_strerror(ret));
Simon Glass4d098522013-06-13 15:10:09 -0700617 return -1;
618 }
619 free(value);
620 free(region_prop);
621
622 /* Get keyname again, as FDT has changed and invalidated our pointer */
623 info.keyname = fdt_getprop(fit, noffset, "key-name-hint", NULL);
624
625 /* Write the public key into the supplied FDT file */
Simon Glassa9468112014-06-02 22:04:53 -0600626 if (keydest) {
Andrew Duda83dd98e2016-11-08 18:53:41 +0000627 ret = info.crypto->add_verify_data(&info, keydest);
Simon Glass597a8b22014-06-12 07:24:42 -0600628 if (ret == -ENOSPC)
629 return -ENOSPC;
Simon Glassa9468112014-06-02 22:04:53 -0600630 if (ret) {
631 printf("Failed to add verification data for '%s' signature node in '%s' image node\n",
632 node_name, conf_name);
Simon Glassa9468112014-06-02 22:04:53 -0600633 }
Simon Glass597a8b22014-06-12 07:24:42 -0600634 return ret;
Simon Glass4d098522013-06-13 15:10:09 -0700635 }
636
637 return 0;
638}
639
640static int fit_config_add_verification_data(const char *keydir, void *keydest,
641 void *fit, int conf_noffset, const char *comment,
George McCollisterf1ca1fd2017-01-06 13:14:17 -0600642 int require_keys, const char *engine_id)
Simon Glass4d098522013-06-13 15:10:09 -0700643{
644 const char *conf_name;
645 int noffset;
646
647 conf_name = fit_get_name(fit, conf_noffset, NULL);
648
649 /* Process all hash subnodes of the configuration node */
650 for (noffset = fdt_first_subnode(fit, conf_noffset);
651 noffset >= 0;
652 noffset = fdt_next_subnode(fit, noffset)) {
653 const char *node_name;
654 int ret = 0;
655
656 node_name = fit_get_name(fit, noffset, NULL);
657 if (!strncmp(node_name, FIT_SIG_NODENAME,
658 strlen(FIT_SIG_NODENAME))) {
659 ret = fit_config_process_sig(keydir, keydest,
660 fit, conf_name, conf_noffset, noffset, comment,
George McCollisterf1ca1fd2017-01-06 13:14:17 -0600661 require_keys, engine_id);
Simon Glass4d098522013-06-13 15:10:09 -0700662 }
663 if (ret)
664 return ret;
665 }
666
667 return 0;
668}
669
Simon Glass56518e72013-06-13 15:10:01 -0700670int fit_add_verification_data(const char *keydir, void *keydest, void *fit,
George McCollisterf1ca1fd2017-01-06 13:14:17 -0600671 const char *comment, int require_keys,
672 const char *engine_id)
Simon Glassbbb467d2013-05-07 06:12:01 +0000673{
Simon Glass4d098522013-06-13 15:10:09 -0700674 int images_noffset, confs_noffset;
Simon Glassbbb467d2013-05-07 06:12:01 +0000675 int noffset;
676 int ret;
677
678 /* Find images parent node offset */
679 images_noffset = fdt_path_offset(fit, FIT_IMAGES_PATH);
680 if (images_noffset < 0) {
681 printf("Can't find images parent node '%s' (%s)\n",
682 FIT_IMAGES_PATH, fdt_strerror(images_noffset));
683 return images_noffset;
684 }
685
686 /* Process its subnodes, print out component images details */
687 for (noffset = fdt_first_subnode(fit, images_noffset);
688 noffset >= 0;
689 noffset = fdt_next_subnode(fit, noffset)) {
690 /*
691 * Direct child node of the images parent node,
692 * i.e. component image node.
693 */
Simon Glass56518e72013-06-13 15:10:01 -0700694 ret = fit_image_add_verification_data(keydir, keydest,
George McCollisterf1ca1fd2017-01-06 13:14:17 -0600695 fit, noffset, comment, require_keys, engine_id);
Simon Glassbbb467d2013-05-07 06:12:01 +0000696 if (ret)
697 return ret;
Simon Glass604f23d2013-05-07 06:11:54 +0000698 }
699
Simon Glass4d098522013-06-13 15:10:09 -0700700 /* If there are no keys, we can't sign configurations */
701 if (!IMAGE_ENABLE_SIGN || !keydir)
702 return 0;
703
704 /* Find configurations parent node offset */
705 confs_noffset = fdt_path_offset(fit, FIT_CONFS_PATH);
706 if (confs_noffset < 0) {
707 printf("Can't find images parent node '%s' (%s)\n",
Heiko Schocher04a710a2014-08-11 11:02:17 +0200708 FIT_CONFS_PATH, fdt_strerror(confs_noffset));
Simon Glass4d098522013-06-13 15:10:09 -0700709 return -ENOENT;
710 }
711
712 /* Process its subnodes, print out component images details */
713 for (noffset = fdt_first_subnode(fit, confs_noffset);
714 noffset >= 0;
715 noffset = fdt_next_subnode(fit, noffset)) {
716 ret = fit_config_add_verification_data(keydir, keydest,
717 fit, noffset, comment,
George McCollisterf1ca1fd2017-01-06 13:14:17 -0600718 require_keys,
719 engine_id);
Simon Glass4d098522013-06-13 15:10:09 -0700720 if (ret)
721 return ret;
722 }
723
Simon Glass604f23d2013-05-07 06:11:54 +0000724 return 0;
725}
Heiko Schocher29a23f92014-03-03 12:19:30 +0100726
727#ifdef CONFIG_FIT_SIGNATURE
Simon Glassce1400f2014-06-12 07:24:53 -0600728int fit_check_sign(const void *fit, const void *key)
Heiko Schocher29a23f92014-03-03 12:19:30 +0100729{
730 int cfg_noffset;
731 int ret;
732
Simon Glassce1400f2014-06-12 07:24:53 -0600733 cfg_noffset = fit_conf_get_node(fit, NULL);
Heiko Schocher29a23f92014-03-03 12:19:30 +0100734 if (!cfg_noffset)
735 return -1;
736
Simon Glassce1400f2014-06-12 07:24:53 -0600737 printf("Verifying Hash Integrity ... ");
738 ret = fit_config_verify(fit, cfg_noffset);
739 if (ret)
740 return ret;
741 ret = bootm_host_load_images(fit, cfg_noffset);
742
Heiko Schocher29a23f92014-03-03 12:19:30 +0100743 return ret;
744}
745#endif