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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Based on BLAKE3 v1.3.1, https://github.com/BLAKE3-team/BLAKE3
* Copyright (c) 2019-2020 Samuel Neves and Jack O'Connor
* Copyright (c) 2021 Tino Reichardt <milky-zfs@mcmilk.de>
*/
#ifndef BLAKE3_H
#define BLAKE3_H
#ifdef _KERNEL
#include <sys/types.h>
#else
#include <stdint.h>
#include <stdlib.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
#define BLAKE3_KEY_LEN 32
#define BLAKE3_OUT_LEN 32
#define BLAKE3_MAX_DEPTH 54
#define BLAKE3_BLOCK_LEN 64
#define BLAKE3_CHUNK_LEN 1024
/*
* This struct is a private implementation detail.
* It has to be here because it's part of BLAKE3_CTX below.
*/
typedef struct {
uint32_t cv[8];
uint64_t chunk_counter;
uint8_t buf[BLAKE3_BLOCK_LEN];
uint8_t buf_len;
uint8_t blocks_compressed;
uint8_t flags;
} blake3_chunk_state_t;
typedef struct {
uint32_t key[8];
blake3_chunk_state_t chunk;
uint8_t cv_stack_len;
/*
* The stack size is MAX_DEPTH + 1 because we do lazy merging. For
* example, with 7 chunks, we have 3 entries in the stack. Adding an
* 8th chunk requires a 4th entry, rather than merging everything down
* to 1, because we don't know whether more input is coming. This is
* different from how the reference implementation does things.
*/
uint8_t cv_stack[(BLAKE3_MAX_DEPTH + 1) * BLAKE3_OUT_LEN];
/* const blake3_impl_ops_t *ops */
const void *ops;
} BLAKE3_CTX;
/* init the context for hash operation */
void Blake3_Init(BLAKE3_CTX *ctx);
/* init the context for a MAC and/or tree hash operation */
void Blake3_InitKeyed(BLAKE3_CTX *ctx, const uint8_t key[BLAKE3_KEY_LEN]);
/* process the input bytes */
void Blake3_Update(BLAKE3_CTX *ctx, const void *input, size_t input_len);
/* finalize the hash computation and output the result */
void Blake3_Final(const BLAKE3_CTX *ctx, uint8_t *out);
/* finalize the hash computation and output the result */
void Blake3_FinalSeek(const BLAKE3_CTX *ctx, uint64_t seek, uint8_t *out,
size_t out_len);
/* return number of supported implementations */
extern int blake3_get_impl_count(void);
/* return id of selected implementation */
extern int blake3_get_impl_id(void);
/* return name of selected implementation */
extern const char *blake3_get_impl_name(void);
/* setup id as fastest implementation */
extern void blake3_set_impl_fastest(uint32_t id);
/* set implementation by id */
extern void blake3_set_impl_id(uint32_t id);
/* set implementation by name */
extern int blake3_set_impl_name(const char *name);
/* set startup implementation */
extern void blake3_setup_impl(void);
#ifdef __cplusplus
}
#endif
#endif /* BLAKE3_H */
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