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