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/*
* 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.
*/
#if !defined(AVB_INSIDE_LIBAVB_H) && !defined(AVB_COMPILATION)
#error "Never include this file directly, include libavb.h instead."
#endif
#ifndef AVB_HASH_DESCRIPTOR_H_
#define AVB_HASH_DESCRIPTOR_H_
#include "avb_descriptor.h"
#ifdef __cplusplus
extern "C" {
#endif
/* A descriptor containing information about hash for an image.
*
* This descriptor is typically used for boot partitions to verify the
* entire kernel+initramfs image before executing it.
*
* Following this struct are |partition_name_len| bytes of the
* partition name (UTF-8 encoded), |salt_len| bytes of salt, and then
* |digest_len| bytes of the digest.
*
* The |reserved| field is for future expansion and must be set to NUL
* bytes.
*/
typedef struct AvbHashDescriptor {
AvbDescriptor parent_descriptor;
uint64_t image_size;
uint8_t hash_algorithm[32];
uint32_t partition_name_len;
uint32_t salt_len;
uint32_t digest_len;
uint8_t reserved[64];
} AVB_ATTR_PACKED AvbHashDescriptor;
/* Copies |src| to |dest| and validates, byte-swapping fields in the
* process if needed. Returns true if valid, false if invalid.
*
* Data following the struct is not validated nor copied.
*/
bool avb_hash_descriptor_validate_and_byteswap(const AvbHashDescriptor* src,
AvbHashDescriptor* dest)
AVB_ATTR_WARN_UNUSED_RESULT;
#ifdef __cplusplus
}
#endif
#endif /* AVB_HASH_DESCRIPTOR_H_ */
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