avb_footer.c 1015 B

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  1. // SPDX-License-Identifier: MIT
  2. /*
  3. * Copyright (C) 2016 The Android Open Source Project
  4. */
  5. #include "avb_footer.h"
  6. #include "avb_util.h"
  7. bool avb_footer_validate_and_byteswap(const AvbFooter* src, AvbFooter* dest) {
  8. avb_memcpy(dest, src, sizeof(AvbFooter));
  9. dest->version_major = avb_be32toh(dest->version_major);
  10. dest->version_minor = avb_be32toh(dest->version_minor);
  11. dest->original_image_size = avb_be64toh(dest->original_image_size);
  12. dest->vbmeta_offset = avb_be64toh(dest->vbmeta_offset);
  13. dest->vbmeta_size = avb_be64toh(dest->vbmeta_size);
  14. /* Check that magic is correct. */
  15. if (avb_safe_memcmp(dest->magic, AVB_FOOTER_MAGIC, AVB_FOOTER_MAGIC_LEN) !=
  16. 0) {
  17. avb_error("Footer magic is incorrect.\n");
  18. return false;
  19. }
  20. /* Ensure we don't attempt to access any fields if the footer major
  21. * version is not supported.
  22. */
  23. if (dest->version_major > AVB_FOOTER_VERSION_MAJOR) {
  24. avb_error("No support for footer version.\n");
  25. return false;
  26. }
  27. return true;
  28. }