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