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/*
* dm-verity volume handling
*
* Copyright (C) 2012-2023 Red Hat, Inc. All rights reserved.
*
* This file is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This file is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this file; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef _VERITY_H
#define _VERITY_H
#include <stddef.h>
#include <stdint.h>
#define VERITY_MAX_HASH_TYPE 1
#define VERITY_BLOCK_SIZE_OK(x) ((x) % 512 || (x) < 512 || \
(x) > (512 * 1024) || (x) & ((x)-1))
struct crypt_device;
struct crypt_params_verity;
struct device;
int VERITY_read_sb(struct crypt_device *cd,
uint64_t sb_offset,
char **uuid,
struct crypt_params_verity *params);
int VERITY_write_sb(struct crypt_device *cd,
uint64_t sb_offset,
const char *uuid_string,
struct crypt_params_verity *params);
int VERITY_activate(struct crypt_device *cd,
const char *name,
const char *root_hash,
size_t root_hash_size,
const char *signature_description,
struct device *fec_device,
struct crypt_params_verity *verity_hdr,
uint32_t activation_flags);
int VERITY_verify(struct crypt_device *cd,
struct crypt_params_verity *verity_hdr,
const char *root_hash,
size_t root_hash_size);
int VERITY_create(struct crypt_device *cd,
struct crypt_params_verity *verity_hdr,
const char *root_hash,
size_t root_hash_size);
int VERITY_FEC_process(struct crypt_device *cd,
struct crypt_params_verity *params,
struct device *fec_device,
int check_fec,
unsigned int *errors);
uint64_t VERITY_hash_offset_block(struct crypt_params_verity *params);
uint64_t VERITY_hash_blocks(struct crypt_device *cd, struct crypt_params_verity *params);
uint64_t VERITY_FEC_blocks(struct crypt_device *cd,
struct device *fec_device,
struct crypt_params_verity *params);
uint64_t VERITY_FEC_RS_blocks(uint64_t blocks, uint32_t roots);
int VERITY_UUID_generate(char **uuid_string);
int VERITY_dump(struct crypt_device *cd,
struct crypt_params_verity *verity_hdr,
const char *root_hash,
unsigned int root_hash_size,
struct device *fec_device);
#endif
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