tools/image-host.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (c) 2013, Google Inc.
   4  *
   5  * (C) Copyright 2008 Semihalf
   6  *
   7  * (C) Copyright 2000-2006
   8  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   9  */
  10
  11 #include "mkimage.h"
  12 #include <bootm.h>
  13 #include <image.h>
  14 #include <version.h>
  15
  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 ret == -FDT_ERR_NOSPACE ? -ENOSPC : -EIO;
  41         }
  42
  43         return 0;
  44 }
  45
  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];
  63         const char *node_name;
  64         int value_len;
  65         char *algo;
  66         int ret;
  67
  68         node_name = fit_get_name(fit, noffset, NULL);
  69
  70         if (fit_image_hash_get_algo(fit, noffset, &algo)) {
  71                 printf("Can't get hash algo property for '%s' hash node in '%s' image node\n",
  72                        node_name, image_name);
  73                 return -ENOENT;
  74         }
  75
  76         if (calculate_hash(data, size, algo, value, &value_len)) {
  77                 printf("Unsupported hash algorithm (%s) for '%s' hash node in '%s' image node\n",
  78                        algo, node_name, image_name);
  79                 return -EPROTONOSUPPORT;
  80         }
  81
  82         ret = fit_set_hash_value(fit, noffset, value, value_len);
  83         if (ret) {
  84                 printf("Can't set hash value for '%s' hash node in '%s' image node\n",
  85                        node_name, image_name);
  86                 return ret;
  87         }
  88
  89         return 0;
  90 }
  91
  92 /**
  93  * fit_image_write_sig() - write the signature to a FIT
  94  *
  95  * This writes the signature and signer data to the FIT.
  96  *
  97  * @fit: pointer to the FIT format image header
  98  * @noffset: hash node offset
  99  * @value: signature value to be set
 100  * @value_len: signature value length
 101  * @comment: Text comment to write (NULL for none)
 102  *
 103  * returns
 104  *     0, on success
 105  *     -FDT_ERR_..., on failure
 106  */
 107 static int fit_image_write_sig(void *fit, int noffset, uint8_t *value,
 108                 int value_len, const char *comment, const char *region_prop,
 109                 int region_proplen, const char *cmdname)
 110 {
 111         int string_size;
 112         int ret;
 113
 114         /*
 115          * Get the current string size, before we update the FIT and add
 116          * more
 117          */
 118         string_size = fdt_size_dt_strings(fit);
 119
 120         ret = fdt_setprop(fit, noffset, FIT_VALUE_PROP, value, value_len);
 121         if (!ret) {
 122                 ret = fdt_setprop_string(fit, noffset, "signer-name",
 123                                          "mkimage");
 124         }
 125         if (!ret) {
 126                 ret = fdt_setprop_string(fit, noffset, "signer-version",
 127                                   PLAIN_VERSION);
 128         }
 129         if (comment && !ret)
 130                 ret = fdt_setprop_string(fit, noffset, "comment", comment);
 131         if (!ret) {
 132                 time_t timestamp = imagetool_get_source_date(cmdname,
 133                                                              time(NULL));
 134
 135                 ret = fit_set_timestamp(fit, noffset, timestamp);
 136         }
 137         if (region_prop && !ret) {
 138                 uint32_t strdata[2];
 139
 140                 ret = fdt_setprop(fit, noffset, "hashed-nodes",
 141                                    region_prop, region_proplen);
 142                 /* This is a legacy offset, it is unused, and must remain 0. */
 143                 strdata[0] = 0;
 144                 strdata[1] = cpu_to_fdt32(string_size);
 145                 if (!ret) {
 146                         ret = fdt_setprop(fit, noffset, "hashed-strings",
 147                                           strdata, sizeof(strdata));
 148                 }
 149         }
 150
 151         return ret;
 152 }
 153
 154 static int fit_image_setup_sig(struct image_sign_info *info,
 155                 const char *keydir, void *fit, const char *image_name,
 156                 int noffset, const char *require_keys, const char *engine_id)
 157 {
 158         const char *node_name;
 159         char *algo_name;
 160         const char *padding_name;
 161
 162         node_name = fit_get_name(fit, noffset, NULL);
 163         if (fit_image_hash_get_algo(fit, noffset, &algo_name)) {
 164                 printf("Can't get algo property for '%s' signature node in '%s' image node\n",
 165                        node_name, image_name);
 166                 return -1;
 167         }
 168
 169         padding_name = fdt_getprop(fit, noffset, "padding", NULL);
 170
 171         memset(info, '\0', sizeof(*info));
 172         info->keydir = keydir;
 173         info->keyname = fdt_getprop(fit, noffset, "key-name-hint", NULL);
 174         info->fit = fit;
 175         info->node_offset = noffset;
 176         info->name = strdup(algo_name);
 177         info->checksum = image_get_checksum_algo(algo_name);
 178         info->crypto = image_get_crypto_algo(algo_name);
 179         info->padding = image_get_padding_algo(padding_name);
 180         info->require_keys = require_keys;
 181         info->engine_id = engine_id;
 182         if (!info->checksum || !info->crypto) {
 183                 printf("Unsupported signature algorithm (%s) for '%s' signature node in '%s' image node\n",
 184                        algo_name, node_name, image_name);
 185                 return -1;
 186         }
 187
 188         return 0;
 189 }
 190
 191 /**
 192  * fit_image_process_sig- Process a single subnode of the images/ node
 193  *
 194  * Check each subnode and process accordingly. For signature nodes we
 195  * generate a signed hash of the supplised data and store it in the node.
 196  *
 197  * @keydir:     Directory containing keys to use for signing
 198  * @keydest:    Destination FDT blob to write public keys into
 199  * @fit:        pointer to the FIT format image header
 200  * @image_name: name of image being processes (used to display errors)
 201  * @noffset:    subnode offset
 202  * @data:       data to process
 203  * @size:       size of data in bytes
 204  * @comment:    Comment to add to signature nodes
 205  * @require_keys: Mark all keys as 'required'
 206  * @engine_id:  Engine to use for signing
 207  * @return 0 if ok, -1 on error
 208  */
 209 static int fit_image_process_sig(const char *keydir, void *keydest,
 210                 void *fit, const char *image_name,
 211                 int noffset, const void *data, size_t size,
 212                 const char *comment, int require_keys, const char *engine_id,
 213                 const char *cmdname)
 214 {
 215         struct image_sign_info info;
 216         struct image_region region;
 217         const char *node_name;
 218         uint8_t *value;
 219         uint value_len;
 220         int ret;
 221
 222         if (fit_image_setup_sig(&info, keydir, fit, image_name, noffset,
 223                                 require_keys ? "image" : NULL, engine_id))
 224                 return -1;
 225
 226         node_name = fit_get_name(fit, noffset, NULL);
 227         region.data = data;
 228         region.size = size;
 229         ret = info.crypto->sign(&info, &region, 1, &value, &value_len);
 230         if (ret) {
 231                 printf("Failed to sign '%s' signature node in '%s' image node: %d\n",
 232                        node_name, image_name, ret);
 233
 234                 /* We allow keys to be missing */
 235                 if (ret == -ENOENT)
 236                         return 0;
 237                 return -1;
 238         }
 239
 240         ret = fit_image_write_sig(fit, noffset, value, value_len, comment,
 241                         NULL, 0, cmdname);
 242         if (ret) {
 243                 if (ret == -FDT_ERR_NOSPACE)
 244                         return -ENOSPC;
 245                 printf("Can't write signature for '%s' signature node in '%s' conf node: %s\n",
 246                        node_name, image_name, fdt_strerror(ret));
 247                 return -1;
 248         }
 249         free(value);
 250
 251         /* Get keyname again, as FDT has changed and invalidated our pointer */
 252         info.keyname = fdt_getprop(fit, noffset, "key-name-hint", NULL);
 253
 254         /*
 255          * Write the public key into the supplied FDT file; this might fail
 256          * several times, since we try signing with successively increasing
 257          * size values
 258          */
 259         if (keydest) {
 260                 ret = info.crypto->add_verify_data(&info, keydest);
 261                 if (ret) {
 262                         printf("Failed to add verification data for '%s' signature node in '%s' image node\n",
 263                                node_name, image_name);
 264                         return ret;
 265                 }
 266         }
 267
 268         return 0;
 269 }
 270
 271 /**
 272  * fit_image_add_verification_data() - calculate/set verig. data for image node
 273  *
 274  * This adds hash and signature values for an component image node.
 275  *
 276  * All existing hash subnodes are checked, if algorithm property is set to
 277  * one of the supported hash algorithms, hash value is computed and
 278  * corresponding hash node property is set, for example:
 279  *
 280  * Input component image node structure:
 281  *
 282  * o image-1 (at image_noffset)
 283  *   | - data = [binary data]
 284  *   o hash-1
 285  *     |- algo = "sha1"
 286  *
 287  * Output component image node structure:
 288  *
 289  * o image-1 (at image_noffset)
 290  *   | - data = [binary data]
 291  *   o hash-1
 292  *     |- algo = "sha1"
 293  *     |- value = sha1(data)
 294  *
 295  * For signature details, please see doc/uImage.FIT/signature.txt
 296  *
 297  * @keydir      Directory containing *.key and *.crt files (or NULL)
 298  * @keydest     FDT Blob to write public keys into (NULL if none)
 299  * @fit:        Pointer to the FIT format image header
 300  * @image_noffset: Requested component image node
 301  * @comment:    Comment to add to signature nodes
 302  * @require_keys: Mark all keys as 'required'
 303  * @engine_id:  Engine to use for signing
 304  * @return: 0 on success, <0 on failure
 305  */
 306 int fit_image_add_verification_data(const char *keydir, void *keydest,
 307                 void *fit, int image_noffset, const char *comment,
 308                 int require_keys, const char *engine_id, const char *cmdname)
 309 {
 310         const char *image_name;
 311         const void *data;
 312         size_t size;
 313         int noffset;
 314
 315         /* Get image data and data length */
 316         if (fit_image_get_data(fit, image_noffset, &data, &size)) {
 317                 printf("Can't get image data/size\n");
 318                 return -1;
 319         }
 320
 321         image_name = fit_get_name(fit, image_noffset, NULL);
 322
 323         /* Process all hash subnodes of the component image node */
 324         for (noffset = fdt_first_subnode(fit, image_noffset);
 325              noffset >= 0;
 326              noffset = fdt_next_subnode(fit, noffset)) {
 327                 const char *node_name;
 328                 int ret = 0;
 329
 330                 /*
 331                  * Check subnode name, must be equal to "hash" or "signature".
 332                  * Multiple hash nodes require unique unit node
 333                  * names, e.g. hash-1, hash-2, signature-1, etc.
 334                  */
 335                 node_name = fit_get_name(fit, noffset, NULL);
 336                 if (!strncmp(node_name, FIT_HASH_NODENAME,
 337                              strlen(FIT_HASH_NODENAME))) {
 338                         ret = fit_image_process_hash(fit, image_name, noffset,
 339                                                 data, size);
 340                 } else if (IMAGE_ENABLE_SIGN && keydir &&
 341                            !strncmp(node_name, FIT_SIG_NODENAME,
 342                                 strlen(FIT_SIG_NODENAME))) {
 343                         ret = fit_image_process_sig(keydir, keydest,
 344                                 fit, image_name, noffset, data, size,
 345                                 comment, require_keys, engine_id, cmdname);
 346                 }
 347                 if (ret)
 348                         return ret;
 349         }
 350
 351         return 0;
 352 }
 353
 354 struct strlist {
 355         int count;
 356         char **strings;
 357 };
 358
 359 static void strlist_init(struct strlist *list)
 360 {
 361         memset(list, '\0', sizeof(*list));
 362 }
 363
 364 static void strlist_free(struct strlist *list)
 365 {
 366         int i;
 367
 368         for (i = 0; i < list->count; i++)
 369                 free(list->strings[i]);
 370         free(list->strings);
 371 }
 372
 373 static int strlist_add(struct strlist *list, const char *str)
 374 {
 375         char *dup;
 376
 377         dup = strdup(str);
 378         list->strings = realloc(list->strings,
 379                                 (list->count + 1) * sizeof(char *));
 380         if (!list || !str)
 381                 return -1;
 382         list->strings[list->count++] = dup;
 383
 384         return 0;
 385 }
 386
 387 static const char *fit_config_get_image_list(void *fit, int noffset,
 388                 int *lenp, int *allow_missingp)
 389 {
 390         static const char default_list[] = FIT_KERNEL_PROP "\0"
 391                         FIT_FDT_PROP;
 392         const char *prop;
 393
 394         /* If there is an "image" property, use that */
 395         prop = fdt_getprop(fit, noffset, "sign-images", lenp);
 396         if (prop) {
 397                 *allow_missingp = 0;
 398                 return *lenp ? prop : NULL;
 399         }
 400
 401         /* Default image list */
 402         *allow_missingp = 1;
 403         *lenp = sizeof(default_list);
 404
 405         return default_list;
 406 }
 407
 408 static int fit_config_get_hash_list(void *fit, int conf_noffset,
 409                                     int sig_offset, struct strlist *node_inc)
 410 {
 411         int allow_missing;
 412         const char *prop, *iname, *end;
 413         const char *conf_name, *sig_name;
 414         char name[200], path[200];
 415         int image_count;
 416         int ret, len;
 417
 418         conf_name = fit_get_name(fit, conf_noffset, NULL);
 419         sig_name = fit_get_name(fit, sig_offset, NULL);
 420
 421         /*
 422          * Build a list of nodes we need to hash. We always need the root
 423          * node and the configuration.
 424          */
 425         strlist_init(node_inc);
 426         snprintf(name, sizeof(name), "%s/%s", FIT_CONFS_PATH, conf_name);
 427         if (strlist_add(node_inc, "/") ||
 428             strlist_add(node_inc, name))
 429                 goto err_mem;
 430
 431         /* Get a list of images that we intend to sign */
 432         prop = fit_config_get_image_list(fit, sig_offset, &len,
 433                                         &allow_missing);
 434         if (!prop)
 435                 return 0;
 436
 437         /* Locate the images */
 438         end = prop + len;
 439         image_count = 0;
 440         for (iname = prop; iname < end; iname += strlen(iname) + 1) {
 441                 int noffset;
 442                 int image_noffset;
 443                 int hash_count;
 444
 445                 image_noffset = fit_conf_get_prop_node(fit, conf_noffset,
 446                                                        iname);
 447                 if (image_noffset < 0) {
 448                         printf("Failed to find image '%s' in  configuration '%s/%s'\n",
 449                                iname, conf_name, sig_name);
 450                         if (allow_missing)
 451                                 continue;
 452
 453                         return -ENOENT;
 454                 }
 455
 456                 ret = fdt_get_path(fit, image_noffset, path, sizeof(path));
 457                 if (ret < 0)
 458                         goto err_path;
 459                 if (strlist_add(node_inc, path))
 460                         goto err_mem;
 461
 462                 snprintf(name, sizeof(name), "%s/%s", FIT_CONFS_PATH,
 463                          conf_name);
 464
 465                 /* Add all this image's hashes */
 466                 hash_count = 0;
 467                 for (noffset = fdt_first_subnode(fit, image_noffset);
 468                      noffset >= 0;
 469                      noffset = fdt_next_subnode(fit, noffset)) {
 470                         const char *name = fit_get_name(fit, noffset, NULL);
 471
 472                         if (strncmp(name, FIT_HASH_NODENAME,
 473                                     strlen(FIT_HASH_NODENAME)))
 474                                 continue;
 475                         ret = fdt_get_path(fit, noffset, path, sizeof(path));
 476                         if (ret < 0)
 477                                 goto err_path;
 478                         if (strlist_add(node_inc, path))
 479                                 goto err_mem;
 480                         hash_count++;
 481                 }
 482
 483                 if (!hash_count) {
 484                         printf("Failed to find any hash nodes in configuration '%s/%s' image '%s' - without these it is not possible to verify this image\n",
 485                                conf_name, sig_name, iname);
 486                         return -ENOMSG;
 487                 }
 488
 489                 image_count++;
 490         }
 491
 492         if (!image_count) {
 493                 printf("Failed to find any images for configuration '%s/%s'\n",
 494                        conf_name, sig_name);
 495                 return -ENOMSG;
 496         }
 497
 498         return 0;
 499
 500 err_mem:
 501         printf("Out of memory processing configuration '%s/%s'\n", conf_name,
 502                sig_name);
 503         return -ENOMEM;
 504
 505 err_path:
 506         printf("Failed to get path for image '%s' in configuration '%s/%s': %s\n",
 507                iname, conf_name, sig_name, fdt_strerror(ret));
 508         return -ENOENT;
 509 }
 510
 511 static int fit_config_get_data(void *fit, int conf_noffset, int noffset,
 512                 struct image_region **regionp, int *region_countp,
 513                 char **region_propp, int *region_proplen)
 514 {
 515         char * const exc_prop[] = {"data"};
 516         struct strlist node_inc;
 517         struct image_region *region;
 518         struct fdt_region fdt_regions[100];
 519         const char *conf_name, *sig_name;
 520         char path[200];
 521         int count, i;
 522         char *region_prop;
 523         int ret, len;
 524
 525         conf_name = fit_get_name(fit, conf_noffset, NULL);
 526         sig_name = fit_get_name(fit, noffset, NULL);
 527         debug("%s: conf='%s', sig='%s'\n", __func__, conf_name, sig_name);
 528
 529         /* Get a list of nodes we want to hash */
 530         ret = fit_config_get_hash_list(fit, conf_noffset, noffset, &node_inc);
 531         if (ret)
 532                 return ret;
 533
 534         /* Get a list of regions to hash */
 535         count = fdt_find_regions(fit, node_inc.strings, node_inc.count,
 536                         exc_prop, ARRAY_SIZE(exc_prop),
 537                         fdt_regions, ARRAY_SIZE(fdt_regions),
 538                         path, sizeof(path), 1);
 539         if (count < 0) {
 540                 printf("Failed to hash configuration '%s/%s': %s\n", conf_name,
 541                        sig_name, fdt_strerror(ret));
 542                 return -EIO;
 543         }
 544         if (count == 0) {
 545                 printf("No data to hash for configuration '%s/%s': %s\n",
 546                        conf_name, sig_name, fdt_strerror(ret));
 547                 return -EINVAL;
 548         }
 549
 550         /* Build our list of data blocks */
 551         region = fit_region_make_list(fit, fdt_regions, count, NULL);
 552         if (!region) {
 553                 printf("Out of memory hashing configuration '%s/%s'\n",
 554                        conf_name, sig_name);
 555                 return -ENOMEM;
 556         }
 557
 558         /* Create a list of all hashed properties */
 559         debug("Hash nodes:\n");
 560         for (i = len = 0; i < node_inc.count; i++) {
 561                 debug("   %s\n", node_inc.strings[i]);
 562                 len += strlen(node_inc.strings[i]) + 1;
 563         }
 564         region_prop = malloc(len);
 565         if (!region_prop) {
 566                 printf("Out of memory setting up regions for configuration '%s/%s'\n",
 567                        conf_name, sig_name);
 568                 return -ENOMEM;
 569         }
 570         for (i = len = 0; i < node_inc.count;
 571              len += strlen(node_inc.strings[i]) + 1, i++)
 572                 strcpy(region_prop + len, node_inc.strings[i]);
 573         strlist_free(&node_inc);
 574
 575         *region_countp = count;
 576         *regionp = region;
 577         *region_propp = region_prop;
 578         *region_proplen = len;
 579
 580         return 0;
 581 }
 582
 583 static int fit_config_process_sig(const char *keydir, void *keydest,
 584                 void *fit, const char *conf_name, int conf_noffset,
 585                 int noffset, const char *comment, int require_keys,
 586                 const char *engine_id, const char *cmdname)
 587 {
 588         struct image_sign_info info;
 589         const char *node_name;
 590         struct image_region *region;
 591         char *region_prop;
 592         int region_proplen;
 593         int region_count;
 594         uint8_t *value;
 595         uint value_len;
 596         int ret;
 597
 598         node_name = fit_get_name(fit, noffset, NULL);
 599         if (fit_config_get_data(fit, conf_noffset, noffset, &region,
 600                                 &region_count, &region_prop, &region_proplen))
 601                 return -1;
 602
 603         if (fit_image_setup_sig(&info, keydir, fit, conf_name, noffset,
 604                                 require_keys ? "conf" : NULL, engine_id))
 605                 return -1;
 606
 607         ret = info.crypto->sign(&info, region, region_count, &value,
 608                                 &value_len);
 609         free(region);
 610         if (ret) {
 611                 printf("Failed to sign '%s' signature node in '%s' conf node\n",
 612                        node_name, conf_name);
 613
 614                 /* We allow keys to be missing */
 615                 if (ret == -ENOENT)
 616                         return 0;
 617                 return -1;
 618         }
 619
 620         ret = fit_image_write_sig(fit, noffset, value, value_len, comment,
 621                                 region_prop, region_proplen, cmdname);
 622         if (ret) {
 623                 if (ret == -FDT_ERR_NOSPACE)
 624                         return -ENOSPC;
 625                 printf("Can't write signature for '%s' signature node in '%s' conf node: %s\n",
 626                        node_name, conf_name, fdt_strerror(ret));
 627                 return -1;
 628         }
 629         free(value);
 630         free(region_prop);
 631
 632         /* Get keyname again, as FDT has changed and invalidated our pointer */
 633         info.keyname = fdt_getprop(fit, noffset, "key-name-hint", NULL);
 634
 635         /* Write the public key into the supplied FDT file */
 636         if (keydest) {
 637                 ret = info.crypto->add_verify_data(&info, keydest);
 638                 if (ret) {
 639                         printf("Failed to add verification data for '%s' signature node in '%s' configuration node\n",
 640                                node_name, conf_name);
 641                 }
 642                 return ret;
 643         }
 644
 645         return 0;
 646 }
 647
 648 static int fit_config_add_verification_data(const char *keydir, void *keydest,
 649                 void *fit, int conf_noffset, const char *comment,
 650                 int require_keys, const char *engine_id, const char *cmdname)
 651 {
 652         const char *conf_name;
 653         int noffset;
 654
 655         conf_name = fit_get_name(fit, conf_noffset, NULL);
 656
 657         /* Process all hash subnodes of the configuration node */
 658         for (noffset = fdt_first_subnode(fit, conf_noffset);
 659              noffset >= 0;
 660              noffset = fdt_next_subnode(fit, noffset)) {
 661                 const char *node_name;
 662                 int ret = 0;
 663
 664                 node_name = fit_get_name(fit, noffset, NULL);
 665                 if (!strncmp(node_name, FIT_SIG_NODENAME,
 666                              strlen(FIT_SIG_NODENAME))) {
 667                         ret = fit_config_process_sig(keydir, keydest,
 668                                 fit, conf_name, conf_noffset, noffset, comment,
 669                                 require_keys, engine_id, cmdname);
 670                 }
 671                 if (ret)
 672                         return ret;
 673         }
 674
 675         return 0;
 676 }
 677
 678 int fit_add_verification_data(const char *keydir, void *keydest, void *fit,
 679                               const char *comment, int require_keys,
 680                               const char *engine_id, const char *cmdname)
 681 {
 682         int images_noffset, confs_noffset;
 683         int noffset;
 684         int ret;
 685
 686         /* Find images parent node offset */
 687         images_noffset = fdt_path_offset(fit, FIT_IMAGES_PATH);
 688         if (images_noffset < 0) {
 689                 printf("Can't find images parent node '%s' (%s)\n",
 690                        FIT_IMAGES_PATH, fdt_strerror(images_noffset));
 691                 return images_noffset;
 692         }
 693
 694         /* Process its subnodes, print out component images details */
 695         for (noffset = fdt_first_subnode(fit, images_noffset);
 696              noffset >= 0;
 697              noffset = fdt_next_subnode(fit, noffset)) {
 698                 /*
 699                  * Direct child node of the images parent node,
 700                  * i.e. component image node.
 701                  */
 702                 ret = fit_image_add_verification_data(keydir, keydest,
 703                                 fit, noffset, comment, require_keys, engine_id,
 704                                 cmdname);
 705                 if (ret)
 706                         return ret;
 707         }
 708
 709         /* If there are no keys, we can't sign configurations */
 710         if (!IMAGE_ENABLE_SIGN || !keydir)
 711                 return 0;
 712
 713         /* Find configurations parent node offset */
 714         confs_noffset = fdt_path_offset(fit, FIT_CONFS_PATH);
 715         if (confs_noffset < 0) {
 716                 printf("Can't find images parent node '%s' (%s)\n",
 717                        FIT_CONFS_PATH, fdt_strerror(confs_noffset));
 718                 return -ENOENT;
 719         }
 720
 721         /* Process its subnodes, print out component images details */
 722         for (noffset = fdt_first_subnode(fit, confs_noffset);
 723              noffset >= 0;
 724              noffset = fdt_next_subnode(fit, noffset)) {
 725                 ret = fit_config_add_verification_data(keydir, keydest,
 726                                                        fit, noffset, comment,
 727                                                        require_keys,
 728                                                        engine_id, cmdname);
 729                 if (ret)
 730                         return ret;
 731         }
 732
 733         return 0;
 734 }
 735
 736 #ifdef CONFIG_FIT_SIGNATURE
 737 int fit_check_sign(const void *fit, const void *key)
 738 {
 739         int cfg_noffset;
 740         int ret;
 741
 742         cfg_noffset = fit_conf_get_node(fit, NULL);
 743         if (!cfg_noffset)
 744                 return -1;
 745
 746         printf("Verifying Hash Integrity ... ");
 747         ret = fit_config_verify(fit, cfg_noffset);
 748         if (ret)
 749                 return ret;
 750         ret = bootm_host_load_images(fit, cfg_noffset);
 751
 752         return ret;
 753 }
 754 #endif