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"Das U-Boot" Source Tree
1/* SPDX-License-Identifier: CC0-1.0 */
2/*
3 BLAKE2 reference source code package - reference C implementations
4
5 Copyright 2012, Samuel Neves <sneves@dei.uc.pt>. You may use this under the
6 terms of the CC0, the OpenSSL Licence, or the Apache Public License 2.0, at
7 your option. The terms of these licenses can be found at:
8
9 - CC0 1.0 Universal : http://creativecommons.org/publicdomain/zero/1.0
10 - OpenSSL license : https://www.openssl.org/source/license.html
11 - Apache 2.0 : http://www.apache.org/licenses/LICENSE-2.0
12
13 More information about the BLAKE2 hash function can be found at
14 https://blake2.net.
15*/
16
17/*
18 * Cross-ported from BLAKE2 (https://github.com/BLAKE2/BLAKE2).
19 * Modifications includes:
20 *
21 * - Remove unsupported compilers like MSC/CPP
22 * - Use u-boot library functions/macros
23 */
24#ifndef BLAKE2_IMPL_H
25#define BLAKE2_IMPL_H
26
27#include <stdint.h>
28#include <string.h>
29
30#define BLAKE2_INLINE inline
31
32#ifdef __LITTLE_ENDIAN
33# define NATIVE_LITTLE_ENDIAN
34#endif
35
36static BLAKE2_INLINE uint32_t load32( const void *src )
37{
38#if defined(NATIVE_LITTLE_ENDIAN)
39 uint32_t w;
40 memcpy(&w, src, sizeof w);
41 return w;
42#else
43 const uint8_t *p = ( const uint8_t * )src;
44 return (( uint32_t )( p[0] ) << 0) |
45 (( uint32_t )( p[1] ) << 8) |
46 (( uint32_t )( p[2] ) << 16) |
47 (( uint32_t )( p[3] ) << 24) ;
48#endif
49}
50
51static BLAKE2_INLINE uint64_t load64( const void *src )
52{
53#if defined(NATIVE_LITTLE_ENDIAN)
54 uint64_t w;
55 memcpy(&w, src, sizeof w);
56 return w;
57#else
58 const uint8_t *p = ( const uint8_t * )src;
59 return (( uint64_t )( p[0] ) << 0) |
60 (( uint64_t )( p[1] ) << 8) |
61 (( uint64_t )( p[2] ) << 16) |
62 (( uint64_t )( p[3] ) << 24) |
63 (( uint64_t )( p[4] ) << 32) |
64 (( uint64_t )( p[5] ) << 40) |
65 (( uint64_t )( p[6] ) << 48) |
66 (( uint64_t )( p[7] ) << 56) ;
67#endif
68}
69
70static BLAKE2_INLINE uint16_t load16( const void *src )
71{
72#if defined(NATIVE_LITTLE_ENDIAN)
73 uint16_t w;
74 memcpy(&w, src, sizeof w);
75 return w;
76#else
77 const uint8_t *p = ( const uint8_t * )src;
78 return ( uint16_t )((( uint32_t )( p[0] ) << 0) |
79 (( uint32_t )( p[1] ) << 8));
80#endif
81}
82
83static BLAKE2_INLINE void store16( void *dst, uint16_t w )
84{
85#if defined(NATIVE_LITTLE_ENDIAN)
86 memcpy(dst, &w, sizeof w);
87#else
88 uint8_t *p = ( uint8_t * )dst;
89 *p++ = ( uint8_t )w; w >>= 8;
90 *p++ = ( uint8_t )w;
91#endif
92}
93
94static BLAKE2_INLINE void store32( void *dst, uint32_t w )
95{
96#if defined(NATIVE_LITTLE_ENDIAN)
97 memcpy(dst, &w, sizeof w);
98#else
99 uint8_t *p = ( uint8_t * )dst;
100 p[0] = (uint8_t)(w >> 0);
101 p[1] = (uint8_t)(w >> 8);
102 p[2] = (uint8_t)(w >> 16);
103 p[3] = (uint8_t)(w >> 24);
104#endif
105}
106
107static BLAKE2_INLINE void store64( void *dst, uint64_t w )
108{
109#if defined(NATIVE_LITTLE_ENDIAN)
110 memcpy(dst, &w, sizeof w);
111#else
112 uint8_t *p = ( uint8_t * )dst;
113 p[0] = (uint8_t)(w >> 0);
114 p[1] = (uint8_t)(w >> 8);
115 p[2] = (uint8_t)(w >> 16);
116 p[3] = (uint8_t)(w >> 24);
117 p[4] = (uint8_t)(w >> 32);
118 p[5] = (uint8_t)(w >> 40);
119 p[6] = (uint8_t)(w >> 48);
120 p[7] = (uint8_t)(w >> 56);
121#endif
122}
123
124static BLAKE2_INLINE uint64_t load48( const void *src )
125{
126 const uint8_t *p = ( const uint8_t * )src;
127 return (( uint64_t )( p[0] ) << 0) |
128 (( uint64_t )( p[1] ) << 8) |
129 (( uint64_t )( p[2] ) << 16) |
130 (( uint64_t )( p[3] ) << 24) |
131 (( uint64_t )( p[4] ) << 32) |
132 (( uint64_t )( p[5] ) << 40) ;
133}
134
135static BLAKE2_INLINE void store48( void *dst, uint64_t w )
136{
137 uint8_t *p = ( uint8_t * )dst;
138 p[0] = (uint8_t)(w >> 0);
139 p[1] = (uint8_t)(w >> 8);
140 p[2] = (uint8_t)(w >> 16);
141 p[3] = (uint8_t)(w >> 24);
142 p[4] = (uint8_t)(w >> 32);
143 p[5] = (uint8_t)(w >> 40);
144}
145
146static BLAKE2_INLINE uint32_t rotr32( const uint32_t w, const unsigned c )
147{
148 return ( w >> c ) | ( w << ( 32 - c ) );
149}
150
151static BLAKE2_INLINE uint64_t rotr64( const uint64_t w, const unsigned c )
152{
153 return ( w >> c ) | ( w << ( 64 - c ) );
154}
155
156/* prevents compiler optimizing out memset() */
157static BLAKE2_INLINE void secure_zero_memory(void *v, size_t n)
158{
159 static void *(*const volatile memset_v)(void *, int, size_t) = &memset;
160 memset_v(v, 0, n);
161}
162
163#endif