[331] | 1 | /*
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| 2 | * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | /*
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| 11 | * Derived from the BLAKE2 reference implementation written by Samuel Neves.
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| 12 | * Copyright 2012, Samuel Neves <sneves@dei.uc.pt>
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| 13 | * More information about the BLAKE2 hash function and its implementations
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| 14 | * can be found at https://blake2.net.
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| 15 | */
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| 16 |
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| 17 | #include <string.h>
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| 18 | #include "e_os.h"
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| 19 |
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| 20 | static ossl_inline uint32_t load32(const uint8_t *src)
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| 21 | {
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| 22 | const union {
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| 23 | long one;
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| 24 | char little;
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| 25 | } is_endian = { 1 };
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| 26 |
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| 27 | if (is_endian.little) {
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| 28 | uint32_t w;
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| 29 | memcpy(&w, src, sizeof(w));
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| 30 | return w;
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| 31 | } else {
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| 32 | uint32_t w = ((uint32_t)src[0])
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| 33 | | ((uint32_t)src[1] << 8)
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| 34 | | ((uint32_t)src[2] << 16)
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| 35 | | ((uint32_t)src[3] << 24);
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| 36 | return w;
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| 37 | }
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| 38 | }
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| 39 |
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| 40 | static ossl_inline uint64_t load64(const uint8_t *src)
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| 41 | {
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| 42 | const union {
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| 43 | long one;
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| 44 | char little;
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| 45 | } is_endian = { 1 };
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| 46 |
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| 47 | if (is_endian.little) {
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| 48 | uint64_t w;
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| 49 | memcpy(&w, src, sizeof(w));
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| 50 | return w;
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| 51 | } else {
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| 52 | uint64_t w = ((uint64_t)src[0])
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| 53 | | ((uint64_t)src[1] << 8)
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| 54 | | ((uint64_t)src[2] << 16)
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| 55 | | ((uint64_t)src[3] << 24)
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| 56 | | ((uint64_t)src[4] << 32)
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| 57 | | ((uint64_t)src[5] << 40)
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| 58 | | ((uint64_t)src[6] << 48)
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| 59 | | ((uint64_t)src[7] << 56);
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| 60 | return w;
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| 61 | }
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| 62 | }
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| 63 |
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| 64 | static ossl_inline void store32(uint8_t *dst, uint32_t w)
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| 65 | {
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| 66 | const union {
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| 67 | long one;
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| 68 | char little;
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| 69 | } is_endian = { 1 };
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| 70 |
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| 71 | if (is_endian.little) {
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| 72 | memcpy(dst, &w, sizeof(w));
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| 73 | } else {
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| 74 | uint8_t *p = (uint8_t *)dst;
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| 75 | int i;
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| 76 |
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| 77 | for (i = 0; i < 4; i++)
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| 78 | p[i] = (uint8_t)(w >> (8 * i));
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| 79 | }
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| 80 | }
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| 81 |
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| 82 | static ossl_inline void store64(uint8_t *dst, uint64_t w)
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| 83 | {
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| 84 | const union {
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| 85 | long one;
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| 86 | char little;
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| 87 | } is_endian = { 1 };
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| 88 |
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| 89 | if (is_endian.little) {
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| 90 | memcpy(dst, &w, sizeof(w));
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| 91 | } else {
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| 92 | uint8_t *p = (uint8_t *)dst;
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| 93 | int i;
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| 94 |
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| 95 | for (i = 0; i < 8; i++)
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| 96 | p[i] = (uint8_t)(w >> (8 * i));
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| 97 | }
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| 98 | }
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| 99 |
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| 100 | static ossl_inline uint64_t load48(const uint8_t *src)
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| 101 | {
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| 102 | uint64_t w = ((uint64_t)src[0])
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| 103 | | ((uint64_t)src[1] << 8)
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| 104 | | ((uint64_t)src[2] << 16)
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| 105 | | ((uint64_t)src[3] << 24)
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| 106 | | ((uint64_t)src[4] << 32)
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| 107 | | ((uint64_t)src[5] << 40);
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| 108 | return w;
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| 109 | }
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| 110 |
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| 111 | static ossl_inline void store48(uint8_t *dst, uint64_t w)
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| 112 | {
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| 113 | uint8_t *p = (uint8_t *)dst;
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| 114 | p[0] = (uint8_t)w;
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| 115 | p[1] = (uint8_t)(w>>8);
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| 116 | p[2] = (uint8_t)(w>>16);
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| 117 | p[3] = (uint8_t)(w>>24);
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| 118 | p[4] = (uint8_t)(w>>32);
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| 119 | p[5] = (uint8_t)(w>>40);
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| 120 | }
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| 121 |
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| 122 | static ossl_inline uint32_t rotr32(const uint32_t w, const unsigned int c)
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| 123 | {
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| 124 | return (w >> c) | (w << (32 - c));
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| 125 | }
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| 126 |
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| 127 | static ossl_inline uint64_t rotr64(const uint64_t w, const unsigned int c)
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| 128 | {
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| 129 | return (w >> c) | (w << (64 - c));
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| 130 | }
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