tools/fit_image.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2008 Semihalf
   4  *
   5  * (C) Copyright 2000-2004
   6  * DENX Software Engineering
   7  * Wolfgang Denk, wd@denx.de
   8  *
   9  * Updated-by: Prafulla Wadaskar <prafulla@marvell.com>
  10  *              FIT image specific code abstracted from mkimage.c
  11  *              some functions added to address abstraction
  12  *
  13  * All rights reserved.
  14  */
  15
  16 #include "imagetool.h"
  17 #include "fit_common.h"
  18 #include "mkimage.h"
  19 #include <image.h>
  20 #include <stdarg.h>
  21 #include <version.h>
  22 #include <u-boot/crc.h>
  23
  24 static image_header_t header;
  25
  26 static int fit_add_file_data(struct image_tool_params *params, size_t size_inc,
  27                              const char *tmpfile)
  28 {
  29         int tfd, destfd = 0;
  30         void *dest_blob = NULL;
  31         off_t destfd_size = 0;
  32         struct stat sbuf;
  33         void *ptr;
  34         int ret = 0;
  35
  36         tfd = mmap_fdt(params->cmdname, tmpfile, size_inc, &ptr, &sbuf, true,
  37                        false);
  38         if (tfd < 0)
  39                 return -EIO;
  40
  41         if (params->keydest) {
  42                 struct stat dest_sbuf;
  43
  44                 destfd = mmap_fdt(params->cmdname, params->keydest, size_inc,
  45                                   &dest_blob, &dest_sbuf, false,
  46                                   false);
  47                 if (destfd < 0) {
  48                         ret = -EIO;
  49                         goto err_keydest;
  50                 }
  51                 destfd_size = dest_sbuf.st_size;
  52         }
  53
  54         /* for first image creation, add a timestamp at offset 0 i.e., root  */
  55         if (params->datafile) {
  56                 time_t time = imagetool_get_source_date(params->cmdname,
  57                                                         sbuf.st_mtime);
  58                 ret = fit_set_timestamp(ptr, 0, time);
  59         }
  60
  61         if (!ret) {
  62                 ret = fit_add_verification_data(params->keydir, dest_blob, ptr,
  63                                                 params->comment,
  64                                                 params->require_keys,
  65                                                 params->engine_id,
  66                                                 params->cmdname);
  67         }
  68
  69         if (dest_blob) {
  70                 munmap(dest_blob, destfd_size);
  71                 close(destfd);
  72         }
  73
  74 err_keydest:
  75         munmap(ptr, sbuf.st_size);
  76         close(tfd);
  77
  78         return ret;
  79 }
  80
  81 /**
  82  * fit_calc_size() - Calculate the approximate size of the FIT we will generate
  83  */
  84 static int fit_calc_size(struct image_tool_params *params)
  85 {
  86         struct content_info *cont;
  87         int size, total_size;
  88
  89         size = imagetool_get_filesize(params, params->datafile);
  90         if (size < 0)
  91                 return -1;
  92         total_size = size;
  93
  94         if (params->fit_ramdisk) {
  95                 size = imagetool_get_filesize(params, params->fit_ramdisk);
  96                 if (size < 0)
  97                         return -1;
  98                 total_size += size;
  99         }
 100
 101         for (cont = params->content_head; cont; cont = cont->next) {
 102                 size = imagetool_get_filesize(params, cont->fname);
 103                 if (size < 0)
 104                         return -1;
 105
 106                 /* Add space for properties */
 107                 total_size += size + 300;
 108         }
 109
 110         /* Add plenty of space for headers, properties, nodes, etc. */
 111         total_size += 4096;
 112
 113         return total_size;
 114 }
 115
 116 static int fdt_property_file(struct image_tool_params *params,
 117                              void *fdt, const char *name, const char *fname)
 118 {
 119         struct stat sbuf;
 120         void *ptr;
 121         int ret;
 122         int fd;
 123
 124         fd = open(fname, O_RDWR | O_BINARY);
 125         if (fd < 0) {
 126                 fprintf(stderr, "%s: Can't open %s: %s\n",
 127                         params->cmdname, fname, strerror(errno));
 128                 return -1;
 129         }
 130
 131         if (fstat(fd, &sbuf) < 0) {
 132                 fprintf(stderr, "%s: Can't stat %s: %s\n",
 133                         params->cmdname, fname, strerror(errno));
 134                 goto err;
 135         }
 136
 137         ret = fdt_property_placeholder(fdt, "data", sbuf.st_size, &ptr);
 138         if (ret)
 139                 goto err;
 140         ret = read(fd, ptr, sbuf.st_size);
 141         if (ret != sbuf.st_size) {
 142                 fprintf(stderr, "%s: Can't read %s: %s\n",
 143                         params->cmdname, fname, strerror(errno));
 144                 goto err;
 145         }
 146         close(fd);
 147
 148         return 0;
 149 err:
 150         close(fd);
 151         return -1;
 152 }
 153
 154 static int fdt_property_strf(void *fdt, const char *name, const char *fmt, ...)
 155 {
 156         char str[100];
 157         va_list ptr;
 158
 159         va_start(ptr, fmt);
 160         vsnprintf(str, sizeof(str), fmt, ptr);
 161         va_end(ptr);
 162         return fdt_property_string(fdt, name, str);
 163 }
 164
 165 static void get_basename(char *str, int size, const char *fname)
 166 {
 167         const char *p, *start, *end;
 168         int len;
 169
 170         /*
 171          * Use the base name as the 'name' field. So for example:
 172          *
 173          * "arch/arm/dts/sun7i-a20-bananapro.dtb"
 174          * becomes "sun7i-a20-bananapro"
 175          */
 176         p = strrchr(fname, '/');
 177         start = p ? p + 1 : fname;
 178         p = strrchr(fname, '.');
 179         end = p ? p : fname + strlen(fname);
 180         len = end - start;
 181         if (len >= size)
 182                 len = size - 1;
 183         memcpy(str, start, len);
 184         str[len] = '\0';
 185 }
 186
 187 /**
 188  * fit_write_images() - Write out a list of images to the FIT
 189  *
 190  * We always include the main image (params->datafile). If there are device
 191  * tree files, we include an fdt- node for each of those too.
 192  */
 193 static int fit_write_images(struct image_tool_params *params, char *fdt)
 194 {
 195         struct content_info *cont;
 196         const char *typename;
 197         char str[100];
 198         int upto;
 199         int ret;
 200
 201         fdt_begin_node(fdt, "images");
 202
 203         /* First the main image */
 204         typename = genimg_get_type_short_name(params->fit_image_type);
 205         snprintf(str, sizeof(str), "%s-1", typename);
 206         fdt_begin_node(fdt, str);
 207         fdt_property_string(fdt, FIT_DESC_PROP, params->imagename);
 208         fdt_property_string(fdt, FIT_TYPE_PROP, typename);
 209         fdt_property_string(fdt, FIT_ARCH_PROP,
 210                             genimg_get_arch_short_name(params->arch));
 211         fdt_property_string(fdt, FIT_OS_PROP,
 212                             genimg_get_os_short_name(params->os));
 213         fdt_property_string(fdt, FIT_COMP_PROP,
 214                             genimg_get_comp_short_name(params->comp));
 215         fdt_property_u32(fdt, FIT_LOAD_PROP, params->addr);
 216         fdt_property_u32(fdt, FIT_ENTRY_PROP, params->ep);
 217
 218         /*
 219          * Put data last since it is large. SPL may only load the first part
 220          * of the DT, so this way it can access all the above fields.
 221          */
 222         ret = fdt_property_file(params, fdt, FIT_DATA_PROP, params->datafile);
 223         if (ret)
 224                 return ret;
 225         fdt_end_node(fdt);
 226
 227         /* Now the device tree files if available */
 228         upto = 0;
 229         for (cont = params->content_head; cont; cont = cont->next) {
 230                 if (cont->type != IH_TYPE_FLATDT)
 231                         continue;
 232                 snprintf(str, sizeof(str), "%s-%d", FIT_FDT_PROP, ++upto);
 233                 fdt_begin_node(fdt, str);
 234
 235                 get_basename(str, sizeof(str), cont->fname);
 236                 fdt_property_string(fdt, FIT_DESC_PROP, str);
 237                 ret = fdt_property_file(params, fdt, FIT_DATA_PROP,
 238                                         cont->fname);
 239                 if (ret)
 240                         return ret;
 241                 fdt_property_string(fdt, FIT_TYPE_PROP, typename);
 242                 fdt_property_string(fdt, FIT_ARCH_PROP,
 243                                     genimg_get_arch_short_name(params->arch));
 244                 fdt_property_string(fdt, FIT_COMP_PROP,
 245                                     genimg_get_comp_short_name(IH_COMP_NONE));
 246                 fdt_end_node(fdt);
 247         }
 248
 249         /* And a ramdisk file if available */
 250         if (params->fit_ramdisk) {
 251                 fdt_begin_node(fdt, FIT_RAMDISK_PROP "-1");
 252
 253                 fdt_property_string(fdt, FIT_TYPE_PROP, FIT_RAMDISK_PROP);
 254                 fdt_property_string(fdt, FIT_OS_PROP,
 255                                     genimg_get_os_short_name(params->os));
 256
 257                 ret = fdt_property_file(params, fdt, FIT_DATA_PROP,
 258                                         params->fit_ramdisk);
 259                 if (ret)
 260                         return ret;
 261
 262                 fdt_end_node(fdt);
 263         }
 264
 265         fdt_end_node(fdt);
 266
 267         return 0;
 268 }
 269
 270 /**
 271  * fit_write_configs() - Write out a list of configurations to the FIT
 272  *
 273  * If there are device tree files, we include a configuration for each, which
 274  * selects the main image (params->datafile) and its corresponding device
 275  * tree file.
 276  *
 277  * Otherwise we just create a configuration with the main image in it.
 278  */
 279 static void fit_write_configs(struct image_tool_params *params, char *fdt)
 280 {
 281         struct content_info *cont;
 282         const char *typename;
 283         char str[100];
 284         int upto;
 285
 286         fdt_begin_node(fdt, "configurations");
 287         fdt_property_string(fdt, FIT_DEFAULT_PROP, "conf-1");
 288
 289         upto = 0;
 290         for (cont = params->content_head; cont; cont = cont->next) {
 291                 if (cont->type != IH_TYPE_FLATDT)
 292                         continue;
 293                 typename = genimg_get_type_short_name(cont->type);
 294                 snprintf(str, sizeof(str), "conf-%d", ++upto);
 295                 fdt_begin_node(fdt, str);
 296
 297                 get_basename(str, sizeof(str), cont->fname);
 298                 fdt_property_string(fdt, FIT_DESC_PROP, str);
 299
 300                 typename = genimg_get_type_short_name(params->fit_image_type);
 301                 snprintf(str, sizeof(str), "%s-1", typename);
 302                 fdt_property_string(fdt, typename, str);
 303                 fdt_property_string(fdt, FIT_LOADABLE_PROP, str);
 304
 305                 if (params->fit_ramdisk)
 306                         fdt_property_string(fdt, FIT_RAMDISK_PROP,
 307                                             FIT_RAMDISK_PROP "-1");
 308
 309                 snprintf(str, sizeof(str), FIT_FDT_PROP "-%d", upto);
 310                 fdt_property_string(fdt, FIT_FDT_PROP, str);
 311                 fdt_end_node(fdt);
 312         }
 313
 314         if (!upto) {
 315                 fdt_begin_node(fdt, "conf-1");
 316                 typename = genimg_get_type_short_name(params->fit_image_type);
 317                 snprintf(str, sizeof(str), "%s-1", typename);
 318                 fdt_property_string(fdt, typename, str);
 319
 320                 if (params->fit_ramdisk)
 321                         fdt_property_string(fdt, FIT_RAMDISK_PROP,
 322                                             FIT_RAMDISK_PROP "-1");
 323
 324                 fdt_end_node(fdt);
 325         }
 326
 327         fdt_end_node(fdt);
 328 }
 329
 330 static int fit_build_fdt(struct image_tool_params *params, char *fdt, int size)
 331 {
 332         int ret;
 333
 334         ret = fdt_create(fdt, size);
 335         if (ret)
 336                 return ret;
 337         fdt_finish_reservemap(fdt);
 338         fdt_begin_node(fdt, "");
 339         fdt_property_strf(fdt, FIT_DESC_PROP,
 340                           "%s image with one or more FDT blobs",
 341                           genimg_get_type_name(params->fit_image_type));
 342         fdt_property_strf(fdt, "creator", "U-Boot mkimage %s", PLAIN_VERSION);
 343         fdt_property_u32(fdt, "#address-cells", 1);
 344         ret = fit_write_images(params, fdt);
 345         if (ret)
 346                 return ret;
 347         fit_write_configs(params, fdt);
 348         fdt_end_node(fdt);
 349         ret = fdt_finish(fdt);
 350         if (ret)
 351                 return ret;
 352
 353         return fdt_totalsize(fdt);
 354 }
 355
 356 static int fit_build(struct image_tool_params *params, const char *fname)
 357 {
 358         char *buf;
 359         int size;
 360         int ret;
 361         int fd;
 362
 363         size = fit_calc_size(params);
 364         if (size < 0)
 365                 return -1;
 366         buf = malloc(size);
 367         if (!buf) {
 368                 fprintf(stderr, "%s: Out of memory (%d bytes)\n",
 369                         params->cmdname, size);
 370                 return -1;
 371         }
 372         ret = fit_build_fdt(params, buf, size);
 373         if (ret < 0) {
 374                 fprintf(stderr, "%s: Failed to build FIT image\n",
 375                         params->cmdname);
 376                 goto err_buf;
 377         }
 378         size = ret;
 379         fd = open(fname, O_RDWR | O_CREAT | O_TRUNC | O_BINARY, 0666);
 380         if (fd < 0) {
 381                 fprintf(stderr, "%s: Can't open %s: %s\n",
 382                         params->cmdname, fname, strerror(errno));
 383                 goto err_buf;
 384         }
 385         ret = write(fd, buf, size);
 386         if (ret != size) {
 387                 fprintf(stderr, "%s: Can't write %s: %s\n",
 388                         params->cmdname, fname, strerror(errno));
 389                 goto err;
 390         }
 391         close(fd);
 392         free(buf);
 393
 394         return 0;
 395 err:
 396         close(fd);
 397 err_buf:
 398         free(buf);
 399         return -1;
 400 }
 401
 402 /**
 403  * fit_extract_data() - Move all data outside the FIT
 404  *
 405  * This takes a normal FIT file and removes all the 'data' properties from it.
 406  * The data is placed in an area after the FIT so that it can be accessed
 407  * using an offset into that area. The 'data' properties turn into
 408  * 'data-offset' properties.
 409  *
 410  * This function cannot cope with FITs with 'data-offset' properties. All
 411  * data must be in 'data' properties on entry.
 412  */
 413 static int fit_extract_data(struct image_tool_params *params, const char *fname)
 414 {
 415         void *buf;
 416         int buf_ptr;
 417         int fit_size, new_size;
 418         int fd;
 419         struct stat sbuf;
 420         void *fdt;
 421         int ret;
 422         int images;
 423         int node;
 424
 425         fd = mmap_fdt(params->cmdname, fname, 0, &fdt, &sbuf, false, false);
 426         if (fd < 0)
 427                 return -EIO;
 428         fit_size = fdt_totalsize(fdt);
 429
 430         /* Allocate space to hold the image data we will extract */
 431         buf = malloc(fit_size);
 432         if (!buf) {
 433                 ret = -ENOMEM;
 434                 goto err_munmap;
 435         }
 436         buf_ptr = 0;
 437
 438         images = fdt_path_offset(fdt, FIT_IMAGES_PATH);
 439         if (images < 0) {
 440                 debug("%s: Cannot find /images node: %d\n", __func__, images);
 441                 ret = -EINVAL;
 442                 goto err_munmap;
 443         }
 444
 445         for (node = fdt_first_subnode(fdt, images);
 446              node >= 0;
 447              node = fdt_next_subnode(fdt, node)) {
 448                 const char *data;
 449                 int len;
 450
 451                 data = fdt_getprop(fdt, node, FIT_DATA_PROP, &len);
 452                 if (!data)
 453                         continue;
 454                 memcpy(buf + buf_ptr, data, len);
 455                 debug("Extracting data size %x\n", len);
 456
 457                 ret = fdt_delprop(fdt, node, FIT_DATA_PROP);
 458                 if (ret) {
 459                         ret = -EPERM;
 460                         goto err_munmap;
 461                 }
 462                 if (params->external_offset > 0) {
 463                         /* An external offset positions the data absolutely. */
 464                         fdt_setprop_u32(fdt, node, FIT_DATA_POSITION_PROP,
 465                                         params->external_offset + buf_ptr);
 466                 } else {
 467                         fdt_setprop_u32(fdt, node, FIT_DATA_OFFSET_PROP,
 468                                         buf_ptr);
 469                 }
 470                 fdt_setprop_u32(fdt, node, FIT_DATA_SIZE_PROP, len);
 471
 472                 buf_ptr += (len + 3) & ~3;
 473         }
 474
 475         /* Pack the FDT and place the data after it */
 476         fdt_pack(fdt);
 477
 478         debug("Size reduced from %x to %x\n", fit_size, fdt_totalsize(fdt));
 479         debug("External data size %x\n", buf_ptr);
 480         new_size = fdt_totalsize(fdt);
 481         new_size = (new_size + 3) & ~3;
 482         munmap(fdt, sbuf.st_size);
 483
 484         if (ftruncate(fd, new_size)) {
 485                 debug("%s: Failed to truncate file: %s\n", __func__,
 486                       strerror(errno));
 487                 ret = -EIO;
 488                 goto err;
 489         }
 490
 491         /* Check if an offset for the external data was set. */
 492         if (params->external_offset > 0) {
 493                 if (params->external_offset < new_size) {
 494                         debug("External offset %x overlaps FIT length %x",
 495                               params->external_offset, new_size);
 496                         ret = -EINVAL;
 497                         goto err;
 498                 }
 499                 new_size = params->external_offset;
 500         }
 501         if (lseek(fd, new_size, SEEK_SET) < 0) {
 502                 debug("%s: Failed to seek to end of file: %s\n", __func__,
 503                       strerror(errno));
 504                 ret = -EIO;
 505                 goto err;
 506         }
 507         if (write(fd, buf, buf_ptr) != buf_ptr) {
 508                 debug("%s: Failed to write external data to file %s\n",
 509                       __func__, strerror(errno));
 510                 ret = -EIO;
 511                 goto err;
 512         }
 513         free(buf);
 514         close(fd);
 515         return 0;
 516
 517 err_munmap:
 518         munmap(fdt, sbuf.st_size);
 519 err:
 520         if (buf)
 521                 free(buf);
 522         close(fd);
 523         return ret;
 524 }
 525
 526 static int fit_import_data(struct image_tool_params *params, const char *fname)
 527 {
 528         void *fdt, *old_fdt;
 529         int fit_size, new_size, size, data_base;
 530         int fd;
 531         struct stat sbuf;
 532         int ret;
 533         int images;
 534         int node;
 535
 536         fd = mmap_fdt(params->cmdname, fname, 0, &old_fdt, &sbuf, false, false);
 537         if (fd < 0)
 538                 return -EIO;
 539         fit_size = fdt_totalsize(old_fdt);
 540         data_base = (fit_size + 3) & ~3;
 541
 542         /* Allocate space to hold the new FIT */
 543         size = sbuf.st_size + 16384;
 544         fdt = malloc(size);
 545         if (!fdt) {
 546                 fprintf(stderr, "%s: Failed to allocate memory (%d bytes)\n",
 547                         __func__, size);
 548                 ret = -ENOMEM;
 549                 goto err_has_fd;
 550         }
 551         ret = fdt_open_into(old_fdt, fdt, size);
 552         if (ret) {
 553                 debug("%s: Failed to expand FIT: %s\n", __func__,
 554                       fdt_strerror(errno));
 555                 ret = -EINVAL;
 556                 goto err_has_fd;
 557         }
 558
 559         images = fdt_path_offset(fdt, FIT_IMAGES_PATH);
 560         if (images < 0) {
 561                 debug("%s: Cannot find /images node: %d\n", __func__, images);
 562                 ret = -EINVAL;
 563                 goto err_has_fd;
 564         }
 565
 566         for (node = fdt_first_subnode(fdt, images);
 567              node >= 0;
 568              node = fdt_next_subnode(fdt, node)) {
 569                 int buf_ptr;
 570                 int len;
 571
 572                 buf_ptr = fdtdec_get_int(fdt, node, "data-offset", -1);
 573                 len = fdtdec_get_int(fdt, node, "data-size", -1);
 574                 if (buf_ptr == -1 || len == -1)
 575                         continue;
 576                 debug("Importing data size %x\n", len);
 577
 578                 ret = fdt_setprop(fdt, node, "data", fdt + data_base + buf_ptr,
 579                                   len);
 580                 if (ret) {
 581                         debug("%s: Failed to write property: %s\n", __func__,
 582                               fdt_strerror(ret));
 583                         ret = -EINVAL;
 584                         goto err_has_fd;
 585                 }
 586         }
 587
 588         /* Close the old fd so we can re-use it. */
 589         close(fd);
 590
 591         /* Pack the FDT and place the data after it */
 592         fdt_pack(fdt);
 593
 594         new_size = fdt_totalsize(fdt);
 595         debug("Size expanded from %x to %x\n", fit_size, new_size);
 596
 597         fd = open(fname, O_RDWR | O_CREAT | O_TRUNC | O_BINARY, 0666);
 598         if (fd < 0) {
 599                 fprintf(stderr, "%s: Can't open %s: %s\n",
 600                         params->cmdname, fname, strerror(errno));
 601                 ret = -EIO;
 602                 goto err_no_fd;
 603         }
 604         if (write(fd, fdt, new_size) != new_size) {
 605                 debug("%s: Failed to write external data to file %s\n",
 606                       __func__, strerror(errno));
 607                 ret = -EIO;
 608                 goto err_has_fd;
 609         }
 610
 611         ret = 0;
 612
 613 err_has_fd:
 614         close(fd);
 615 err_no_fd:
 616         munmap(old_fdt, sbuf.st_size);
 617         free(fdt);
 618         return ret;
 619 }
 620
 621 /**
 622  * fit_handle_file - main FIT file processing function
 623  *
 624  * fit_handle_file() runs dtc to convert .its to .itb, includes
 625  * binary data, updates timestamp property and calculates hashes.
 626  *
 627  * datafile  - .its file
 628  * imagefile - .itb file
 629  *
 630  * returns:
 631  *     only on success, otherwise calls exit (EXIT_FAILURE);
 632  */
 633 static int fit_handle_file(struct image_tool_params *params)
 634 {
 635         char tmpfile[MKIMAGE_MAX_TMPFILE_LEN];
 636         char cmd[MKIMAGE_MAX_DTC_CMDLINE_LEN];
 637         size_t size_inc;
 638         int ret;
 639
 640         /* Flattened Image Tree (FIT) format  handling */
 641         debug ("FIT format handling\n");
 642
 643         /* call dtc to include binary properties into the tmp file */
 644         if (strlen (params->imagefile) +
 645                 strlen (MKIMAGE_TMPFILE_SUFFIX) + 1 > sizeof (tmpfile)) {
 646                 fprintf (stderr, "%s: Image file name (%s) too long, "
 647                                 "can't create tmpfile",
 648                                 params->imagefile, params->cmdname);
 649                 return (EXIT_FAILURE);
 650         }
 651         sprintf (tmpfile, "%s%s", params->imagefile, MKIMAGE_TMPFILE_SUFFIX);
 652
 653         /* We either compile the source file, or use the existing FIT image */
 654         if (params->auto_its) {
 655                 if (fit_build(params, tmpfile)) {
 656                         fprintf(stderr, "%s: failed to build FIT\n",
 657                                 params->cmdname);
 658                         return EXIT_FAILURE;
 659                 }
 660                 *cmd = '\0';
 661         } else if (params->datafile) {
 662                 /* dtc -I dts -O dtb -p 500 -o tmpfile datafile */
 663                 snprintf(cmd, sizeof(cmd), "%s %s -o \"%s\" \"%s\"",
 664                          MKIMAGE_DTC, params->dtc, tmpfile, params->datafile);
 665                 debug("Trying to execute \"%s\"\n", cmd);
 666         } else {
 667                 snprintf(cmd, sizeof(cmd), "cp \"%s\" \"%s\"",
 668                          params->imagefile, tmpfile);
 669         }
 670         if (*cmd && system(cmd) == -1) {
 671                 fprintf (stderr, "%s: system(%s) failed: %s\n",
 672                                 params->cmdname, cmd, strerror(errno));
 673                 goto err_system;
 674         }
 675
 676         /* Move the data so it is internal to the FIT, if needed */
 677         ret = fit_import_data(params, tmpfile);
 678         if (ret)
 679                 goto err_system;
 680
 681         /*
 682          * Set hashes for images in the blob. Unfortunately we may need more
 683          * space in either FDT, so keep trying until we succeed.
 684          *
 685          * Note: this is pretty inefficient for signing, since we must
 686          * calculate the signature every time. It would be better to calculate
 687          * all the data and then store it in a separate step. However, this
 688          * would be considerably more complex to implement. Generally a few
 689          * steps of this loop is enough to sign with several keys.
 690          */
 691         for (size_inc = 0; size_inc < 64 * 1024; size_inc += 1024) {
 692                 ret = fit_add_file_data(params, size_inc, tmpfile);
 693                 if (!ret || ret != -ENOSPC)
 694                         break;
 695         }
 696
 697         if (ret) {
 698                 fprintf(stderr, "%s Can't add hashes to FIT blob: %d\n",
 699                         params->cmdname, ret);
 700                 goto err_system;
 701         }
 702
 703         /* Move the data so it is external to the FIT, if requested */
 704         if (params->external_data) {
 705                 ret = fit_extract_data(params, tmpfile);
 706                 if (ret)
 707                         goto err_system;
 708         }
 709
 710         if (rename (tmpfile, params->imagefile) == -1) {
 711                 fprintf (stderr, "%s: Can't rename %s to %s: %s\n",
 712                                 params->cmdname, tmpfile, params->imagefile,
 713                                 strerror (errno));
 714                 unlink (tmpfile);
 715                 unlink (params->imagefile);
 716                 return EXIT_FAILURE;
 717         }
 718         return EXIT_SUCCESS;
 719
 720 err_system:
 721         unlink(tmpfile);
 722         return -1;
 723 }
 724
 725 /**
 726  * fit_image_extract - extract a FIT component image
 727  * @fit: pointer to the FIT format image header
 728  * @image_noffset: offset of the component image node
 729  * @file_name: name of the file to store the FIT sub-image
 730  *
 731  * returns:
 732  *     zero in case of success or a negative value if fail.
 733  */
 734 static int fit_image_extract(
 735         const void *fit,
 736         int image_noffset,
 737         const char *file_name)
 738 {
 739         const void *file_data;
 740         size_t file_size = 0;
 741
 742         /* get the "data" property of component at offset "image_noffset" */
 743         fit_image_get_data(fit, image_noffset, &file_data, &file_size);
 744
 745         /* save the "file_data" into the file specified by "file_name" */
 746         return imagetool_save_subimage(file_name, (ulong) file_data, file_size);
 747 }
 748
 749 /**
 750  * fit_extract_contents - retrieve a sub-image component from the FIT image
 751  * @ptr: pointer to the FIT format image header
 752  * @params: command line parameters
 753  *
 754  * returns:
 755  *     zero in case of success or a negative value if fail.
 756  */
 757 static int fit_extract_contents(void *ptr, struct image_tool_params *params)
 758 {
 759         int images_noffset;
 760         int noffset;
 761         int ndepth;
 762         const void *fit = ptr;
 763         int count = 0;
 764         const char *p;
 765
 766         /* Indent string is defined in header image.h */
 767         p = IMAGE_INDENT_STRING;
 768
 769         if (!fit_check_format(fit)) {
 770                 printf("Bad FIT image format\n");
 771                 return -1;
 772         }
 773
 774         /* Find images parent node offset */
 775         images_noffset = fdt_path_offset(fit, FIT_IMAGES_PATH);
 776         if (images_noffset < 0) {
 777                 printf("Can't find images parent node '%s' (%s)\n",
 778                        FIT_IMAGES_PATH, fdt_strerror(images_noffset));
 779                 return -1;
 780         }
 781
 782         /* Avoid any overrun */
 783         count = fit_get_subimage_count(fit, images_noffset);
 784         if ((params->pflag < 0) || (count <= params->pflag)) {
 785                 printf("No such component at '%d'\n", params->pflag);
 786                 return -1;
 787         }
 788
 789         /* Process its subnodes, extract the desired component from image */
 790         for (ndepth = 0, count = 0,
 791                 noffset = fdt_next_node(fit, images_noffset, &ndepth);
 792                 (noffset >= 0) && (ndepth > 0);
 793                 noffset = fdt_next_node(fit, noffset, &ndepth)) {
 794                 if (ndepth == 1) {
 795                         /*
 796                          * Direct child node of the images parent node,
 797                          * i.e. component image node.
 798                          */
 799                         if (params->pflag == count) {
 800                                 printf("Extracted:\n%s Image %u (%s)\n", p,
 801                                        count, fit_get_name(fit, noffset, NULL));
 802
 803                                 fit_image_print(fit, noffset, p);
 804
 805                                 return fit_image_extract(fit, noffset,
 806                                                 params->outfile);
 807                         }
 808
 809                         count++;
 810                 }
 811         }
 812
 813         return 0;
 814 }
 815
 816 static int fit_check_params(struct image_tool_params *params)
 817 {
 818         if (params->auto_its)
 819                 return 0;
 820         return  ((params->dflag && (params->fflag || params->lflag)) ||
 821                 (params->fflag && (params->dflag || params->lflag)) ||
 822                 (params->lflag && (params->dflag || params->fflag)));
 823 }
 824
 825 U_BOOT_IMAGE_TYPE(
 826         fitimage,
 827         "FIT Image support",
 828         sizeof(image_header_t),
 829         (void *)&header,
 830         fit_check_params,
 831         fit_verify_header,
 832         fit_print_contents,
 833         NULL,
 834         fit_extract_contents,
 835         fit_check_image_types,
 836         fit_handle_file,
 837         NULL /* FIT images use DTB header */
 838 );