/*
* Copyright (c) 2019-2021 David Timber <mieabby@gmail.com>
*
* 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.
*/
#pragma once
#include <stdint.h>
#include <stddef.h>
#include <stdbool.h>

#define PRNE_RND_WELL512_SEEDLEN 64

struct prne_rnd {
	void *ctx;
	void (*free_ctx_f)(void*);
	bool (*random)(void*, uint8_t *buf, size_t len);
};

typedef struct prne_rnd prne_rnd_t;


void prne_init_rnd (prne_rnd_t *p);
void prne_free_rnd (prne_rnd_t *p);
bool prne_rnd (prne_rnd_t *p, uint8_t *buf, const size_t len);

/*
* is_len should be 64 bytes(512 bits).
*/
bool prne_rnd_alloc_well512 (
	prne_rnd_t *p,
	const uint8_t *is);