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/*
* Copyright 2016-2017 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
/*
* Derived from the BLAKE2 reference implementation written by Samuel Neves.
* Copyright 2012, Samuel Neves <sneves@dei.uc.pt>
* More information about the BLAKE2 hash function and its implementations
* can be found at https://blake2.net.
*/
#include <string.h>
static ossl_inline uint32_t load32(const uint8_t *src)
{
const union {
long one;
char little;
} is_endian = { 1 };
if (is_endian.little) {
uint32_t w;
memcpy(&w, src, sizeof(w));
return w;
} else {
uint32_t w = ((uint32_t)src[0])
| ((uint32_t)src[1] << 8)
| ((uint32_t)src[2] << 16)
| ((uint32_t)src[3] << 24);
return w;
}
}
static ossl_inline uint64_t load64(const uint8_t *src)
{
const union {
long one;
char little;
} is_endian = { 1 };
if (is_endian.little) {
uint64_t w;
memcpy(&w, src, sizeof(w));
return w;
} else {
uint64_t w = ((uint64_t)src[0])
| ((uint64_t)src[1] << 8)
| ((uint64_t)src[2] << 16)
| ((uint64_t)src[3] << 24)
| ((uint64_t)src[4] << 32)
| ((uint64_t)src[5] << 40)
| ((uint64_t)src[6] << 48)
| ((uint64_t)src[7] << 56);
return w;
}
}
static ossl_inline void store32(uint8_t *dst, uint32_t w)
{
const union {
long one;
char little;
} is_endian = { 1 };
if (is_endian.little) {
memcpy(dst, &w, sizeof(w));
} else {
uint8_t *p = (uint8_t *)dst;
int i;
for (i = 0; i < 4; i++)
p[i] = (uint8_t)(w >> (8 * i));
}
}
static ossl_inline void store64(uint8_t *dst, uint64_t w)
{
const union {
long one;
char little;
} is_endian = { 1 };
if (is_endian.little) {
memcpy(dst, &w, sizeof(w));
} else {
uint8_t *p = (uint8_t *)dst;
int i;
for (i = 0; i < 8; i++)
p[i] = (uint8_t)(w >> (8 * i));
}
}
static ossl_inline uint64_t load48(const uint8_t *src)
{
uint64_t w = ((uint64_t)src[0])
| ((uint64_t)src[1] << 8)
| ((uint64_t)src[2] << 16)
| ((uint64_t)src[3] << 24)
| ((uint64_t)src[4] << 32)
| ((uint64_t)src[5] << 40);
return w;
}
static ossl_inline void store48(uint8_t *dst, uint64_t w)
{
uint8_t *p = (uint8_t *)dst;
p[0] = (uint8_t)w;
p[1] = (uint8_t)(w>>8);
p[2] = (uint8_t)(w>>16);
p[3] = (uint8_t)(w>>24);
p[4] = (uint8_t)(w>>32);
p[5] = (uint8_t)(w>>40);
}
static ossl_inline uint32_t rotr32(const uint32_t w, const unsigned int c)
{
return (w >> c) | (w << (32 - c));
}
static ossl_inline uint64_t rotr64(const uint64_t w, const unsigned int c)
{
return (w >> c) | (w << (64 - c));
}
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