/*      $NetBSD: chacha_impl.h,v 1.2 2025/12/22 16:35:34 nia Exp $      */

/*-
 * Copyright (c) 2020 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _SYS_CRYPTO_CHACHA_CHACHA_IMPL_H
#define _SYS_CRYPTO_CHACHA_CHACHA_IMPL_H

#ifdef _KERNEL
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/endian.h>
#else
#include <stdint.h>
#include <string.h>
#include <endian.h>
#endif

#include <crypto/chacha/chacha.h>

struct chacha_impl {
        const char *ci_name;
        int     (*ci_probe)(void);
        void    (*ci_chacha_core)(uint8_t[restrict static CHACHA_CORE_OUTBYTES],
                    const uint8_t[static CHACHA_CORE_INBYTES],
                    const uint8_t[static CHACHA_CORE_KEYBYTES],
                    const uint8_t[static CHACHA_CORE_CONSTBYTES],
                    unsigned);
        void    (*ci_hchacha)(uint8_t[restrict static HCHACHA_OUTBYTES],
                    const uint8_t[static HCHACHA_INBYTES],
                    const uint8_t[static HCHACHA_KEYBYTES],
                    const uint8_t[static HCHACHA_CONSTBYTES],
                    unsigned);
        void    (*ci_chacha_stream)(uint8_t *restrict, size_t,
                    uint32_t,
                    const uint8_t[static CHACHA_STREAM_NONCEBYTES],
                    const uint8_t[static CHACHA_STREAM_KEYBYTES],
                    unsigned);
        void    (*ci_chacha_stream_xor)(uint8_t *, const uint8_t *,
                    size_t,
                    uint32_t,
                    const uint8_t[static CHACHA_STREAM_NONCEBYTES],
                    const uint8_t[static CHACHA_STREAM_KEYBYTES],
                    unsigned);
        void    (*ci_xchacha_stream)(uint8_t *restrict, size_t,
                    uint32_t,
                    const uint8_t[static XCHACHA_STREAM_NONCEBYTES],
                    const uint8_t[static XCHACHA_STREAM_KEYBYTES],
                    unsigned);
        void    (*ci_xchacha_stream_xor)(uint8_t *, const uint8_t *,
                    size_t,
                    uint32_t,
                    const uint8_t[static XCHACHA_STREAM_NONCEBYTES],
                    const uint8_t[static XCHACHA_STREAM_KEYBYTES],
                    unsigned);
};

int     chacha_selftest(const struct chacha_impl *);

void    chacha_md_init(const struct chacha_impl *);

#endif  /* _SYS_CRYPTO_CHACHA_CHACHA_IMPL_H */