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