2 * Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
11 * Derived from the BLAKE2 reference implementation written by Samuel Neves.
12 * Copyright 2012, Samuel Neves <sneves@dei.uc.pt>
13 * More information about the BLAKE2 hash function and its implementations
14 * can be found at https://blake2.net.
18 #include "internal/endian.h"
20 static ossl_inline uint32_t load32(const uint8_t *src)
24 if (IS_LITTLE_ENDIAN) {
26 memcpy(&w, src, sizeof(w));
29 uint32_t w = ((uint32_t)src[0])
30 | ((uint32_t)src[1] << 8)
31 | ((uint32_t)src[2] << 16)
32 | ((uint32_t)src[3] << 24);
37 static ossl_inline uint64_t load64(const uint8_t *src)
41 if (IS_LITTLE_ENDIAN) {
43 memcpy(&w, src, sizeof(w));
46 uint64_t w = ((uint64_t)src[0])
47 | ((uint64_t)src[1] << 8)
48 | ((uint64_t)src[2] << 16)
49 | ((uint64_t)src[3] << 24)
50 | ((uint64_t)src[4] << 32)
51 | ((uint64_t)src[5] << 40)
52 | ((uint64_t)src[6] << 48)
53 | ((uint64_t)src[7] << 56);
58 static ossl_inline void store32(uint8_t *dst, uint32_t w)
62 if (IS_LITTLE_ENDIAN) {
63 memcpy(dst, &w, sizeof(w));
65 uint8_t *p = (uint8_t *)dst;
68 for (i = 0; i < 4; i++)
69 p[i] = (uint8_t)(w >> (8 * i));
73 static ossl_inline void store64(uint8_t *dst, uint64_t w)
77 if (IS_LITTLE_ENDIAN) {
78 memcpy(dst, &w, sizeof(w));
80 uint8_t *p = (uint8_t *)dst;
83 for (i = 0; i < 8; i++)
84 p[i] = (uint8_t)(w >> (8 * i));
88 static ossl_inline uint64_t load48(const uint8_t *src)
90 uint64_t w = ((uint64_t)src[0])
91 | ((uint64_t)src[1] << 8)
92 | ((uint64_t)src[2] << 16)
93 | ((uint64_t)src[3] << 24)
94 | ((uint64_t)src[4] << 32)
95 | ((uint64_t)src[5] << 40);
99 static ossl_inline void store48(uint8_t *dst, uint64_t w)
101 uint8_t *p = (uint8_t *)dst;
103 p[1] = (uint8_t)(w>>8);
104 p[2] = (uint8_t)(w>>16);
105 p[3] = (uint8_t)(w>>24);
106 p[4] = (uint8_t)(w>>32);
107 p[5] = (uint8_t)(w>>40);
110 static ossl_inline uint32_t rotr32(const uint32_t w, const unsigned int c)
112 return (w >> c) | (w << (32 - c));
115 static ossl_inline uint64_t rotr64(const uint64_t w, const unsigned int c)
117 return (w >> c) | (w << (64 - c));