blake2-impl.h

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/*
Copyright (c) 2018-2019, tevador <tevador@gmail.com>

All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
    * Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.
    * 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.
    * Neither the name of the copyright holder nor the
      names of its contributors may be used to endorse or promote products
      derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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.
*/

/* Original code from Argon2 reference source code package used under CC0 Licence
 * https://github.com/P-H-C/phc-winner-argon2
 * Copyright 2015
 * Daniel Dinu, Dmitry Khovratovich, Jean-Philippe Aumasson, and Samuel Neves
*/

#ifndef PORTABLE_BLAKE2_IMPL_H
#define PORTABLE_BLAKE2_IMPL_H

#include <stdint.h>

#include "endian.h"

static FORCE_INLINE uint64_t load48(const void *src) {
    const uint8_t *p = (const uint8_t *)src;
    uint64_t w = *p++;
    w |= (uint64_t)(*p++) << 8;
    w |= (uint64_t)(*p++) << 16;
    w |= (uint64_t)(*p++) << 24;
    w |= (uint64_t)(*p++) << 32;
    w |= (uint64_t)(*p++) << 40;
    return w;
}

static FORCE_INLINE void store48(void *dst, uint64_t w) {
    uint8_t *p = (uint8_t *)dst;
    *p++ = (uint8_t)w;
    w >>= 8;
    *p++ = (uint8_t)w;
    w >>= 8;
    *p++ = (uint8_t)w;
    w >>= 8;
    *p++ = (uint8_t)w;
    w >>= 8;
    *p++ = (uint8_t)w;
    w >>= 8;
    *p++ = (uint8_t)w;
}

static FORCE_INLINE uint32_t rotr32(const uint32_t w, const unsigned c) {
    return (w >> c) | (w << (32 - c));
}

static FORCE_INLINE uint64_t rotr64(const uint64_t w, const unsigned c) {
    return (w >> c) | (w << (64 - c));
}

#endif