/* * Copyright (C) 2016 The Android Open Source Project * * Permission is hereby granted, free of charge, to any person * obtaining a copy of this software and associated documentation * files (the "Software"), to deal in the Software without * restriction, including without limitation the rights to use, copy, * modify, merge, publish, distribute, sublicense, and/or sell copies * of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #include "avb_footer.h" #include "avb_util.h" bool avb_footer_validate_and_byteswap(const AvbFooter* src, AvbFooter* dest) { avb_memcpy(dest, src, sizeof(AvbFooter)); dest->version_major = avb_be32toh(dest->version_major); dest->version_minor = avb_be32toh(dest->version_minor); dest->original_image_size = avb_be64toh(dest->original_image_size); dest->vbmeta_offset = avb_be64toh(dest->vbmeta_offset); dest->vbmeta_size = avb_be64toh(dest->vbmeta_size); /* Check that magic is correct. */ if (avb_safe_memcmp(dest->magic, AVB_FOOTER_MAGIC, AVB_FOOTER_MAGIC_LEN) != 0) { avb_error("Footer magic is incorrect.\n"); return false; } /* Ensure we don't attempt to access any fields if the footer major * version is not supported. */ if (dest->version_major > AVB_FOOTER_VERSION_MAJOR) { avb_error("No support for footer version.\n"); return false; } return true; }