tools/image-host.c

   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  *
   9  * SPDX-License-Identifier:     GPL-2.0+
  10  */
  11
  12 #include "mkimage.h"
  13 #include <bootm.h>
  14 #include <image.h>
  15 #include <version.h>
  16
  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));
  41                 return ret == -FDT_ERR_NOSPACE ? -ENOSPC : -EIO;
  42         }
  43
  44         return 0;
  45 }
  46
  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];
  64         const char *node_name;
  65         int value_len;
  66         char *algo;
  67         int ret;
  68
  69         node_name = fit_get_name(fit, noffset, NULL);
  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",
  73                        node_name, image_name);
  74                 return -ENOENT;
  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",
  79                        algo, node_name, image_name);
  80                 return -EPROTONOSUPPORT;
  81         }
  82
  83         ret = fit_set_hash_value(fit, noffset, value, value_len);
  84         if (ret) {
  85                 printf("Can't set hash value for '%s' hash node in '%s' image node\n",
  86                        node_name, image_name);
  87                 return ret;
  88         }
  89
  90         return 0;
  91 }
  92
  93 /**
  94  * fit_image_write_sig() - write the signature to a FIT
  95  *
  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, const char *engine_id)
 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->name = strdup(algo_name);
 170         info->checksum = image_get_checksum_algo(algo_name);
 171         info->crypto = image_get_crypto_algo(algo_name);
 172         info->require_keys = require_keys;
 173         info->engine_id = engine_id;
 174         if (!info->checksum || !info->crypto) {
 175                 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'
 198  * @engine_id:  Engine to use for signing
 199  * @return 0 if ok, -1 on error
 200  */
 201 static 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,
 204                 const char *comment, int require_keys, const char *engine_id)
 205 {
 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,
 214                                 require_keys ? "image" : NULL, engine_id))
 215                 return -1;
 216
 217         node_name = fit_get_name(fit, noffset, NULL);
 218         region.data = data;
 219         region.size = size;
 220         ret = info.crypto->sign(&info, &region, 1, &value, &value_len);
 221         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) {
 234                 if (ret == -FDT_ERR_NOSPACE)
 235                         return -ENOSPC;
 236                 printf("Can't write signature for '%s' signature node in '%s' conf node: %s\n",
 237                        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
 245         /*
 246          * Write the public key into the supplied FDT file; this might fail
 247          * several times, since we try signing with successively increasing
 248          * size values
 249          */
 250         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         }
 258
 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.
 266  *
 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:
 270  *
 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  *
 286  * For signature details, please see doc/uImage.FIT/signature.txt
 287  *
 288  * @keydir      Directory containing *.key and *.crt files (or NULL)
 289  * @keydest     FDT Blob to write public keys into (NULL if none)
 290  * @fit:        Pointer to the FIT format image header
 291  * @image_noffset: Requested component image node
 292  * @comment:    Comment to add to signature nodes
 293  * @require_keys: Mark all keys as 'required'
 294  * @engine_id:  Engine to use for signing
 295  * @return: 0 on success, <0 on failure
 296  */
 297 int fit_image_add_verification_data(const char *keydir, void *keydest,
 298                 void *fit, int image_noffset, const char *comment,
 299                 int require_keys, const char *engine_id)
 300 {
 301         const char *image_name;
 302         const void *data;
 303         size_t size;
 304         int noffset;
 305
 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
 312         image_name = fit_get_name(fit, image_noffset, NULL);
 313
 314         /* Process all hash subnodes of the component image node */
 315         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);
 331                 } 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,
 336                                 comment, require_keys, engine_id);
 337                 }
 338                 if (ret)
 339                         return ret;
 340         }
 341
 342         return 0;
 343 }
 344
 345 struct strlist {
 346         int count;
 347         char **strings;
 348 };
 349
 350 static void strlist_init(struct strlist *list)
 351 {
 352         memset(list, '\0', sizeof(*list));
 353 }
 354
 355 static 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
 364 static 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
 378 static 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
 399 static 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 */
 423         prop = fit_config_get_image_list(fit, sig_offset, &len,
 424                                         &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
 491 err_mem:
 492         printf("Out of memory processing configuration '%s/%s'\n", conf_name,
 493                sig_name);
 494         return -ENOMEM;
 495
 496 err_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
 502 static 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);
 517         sig_name = fit_get_name(fit, noffset, NULL);
 518         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
 574 static int fit_config_process_sig(const char *keydir, void *keydest,
 575                 void *fit, const char *conf_name, int conf_noffset,
 576                 int noffset, const char *comment, int require_keys,
 577                 const char *engine_id)
 578 {
 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,
 595                                 require_keys ? "conf" : NULL, engine_id))
 596                 return -1;
 597
 598         ret = info.crypto->sign(&info, region, region_count, &value,
 599                                 &value_len);
 600         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
 611         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));
 618                 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 */
 627         if (keydest) {
 628                 ret = info.crypto->add_verify_data(&info, keydest);
 629                 if (ret) {
 630                         printf("Failed to add verification data for '%s' signature node in '%s' configuration node\n",
 631                                node_name, conf_name);
 632                 }
 633                 return ret;
 634         }
 635
 636         return 0;
 637 }
 638
 639 static int fit_config_add_verification_data(const char *keydir, void *keydest,
 640                 void *fit, int conf_noffset, const char *comment,
 641                 int require_keys, const char *engine_id)
 642 {
 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,
 660                                 require_keys, engine_id);
 661                 }
 662                 if (ret)
 663                         return ret;
 664         }
 665
 666         return 0;
 667 }
 668
 669 int fit_add_verification_data(const char *keydir, void *keydest, void *fit,
 670                               const char *comment, int require_keys,
 671                               const char *engine_id)
 672 {
 673         int images_noffset, confs_noffset;
 674         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                  */
 693                 ret = fit_image_add_verification_data(keydir, keydest,
 694                                 fit, noffset, comment, require_keys, engine_id);
 695                 if (ret)
 696                         return ret;
 697         }
 698
 699         /* 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",
 707                        FIT_CONFS_PATH, fdt_strerror(confs_noffset));
 708                 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,
 717                                                        require_keys,
 718                                                        engine_id);
 719                 if (ret)
 720                         return ret;
 721         }
 722
 723         return 0;
 724 }
 725
 726 #ifdef CONFIG_FIT_SIGNATURE
 727 int fit_check_sign(const void *fit, const void *key)
 728 {
 729         int cfg_noffset;
 730         int ret;
 731
 732         cfg_noffset = fit_conf_get_node(fit, NULL);
 733         if (!cfg_noffset)
 734                 return -1;
 735
 736         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
 742         return ret;
 743 }
 744 #endif