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