1 /*
2 BLAKE2 reference source code package - reference C implementations
3
4 Copyright 2012, Samuel Neves <sneves@dei.uc.pt>. You may use this under the
5 terms of the CC0, the OpenSSL Licence, or the Apache Public License 2.0, at
6 your option. The terms of these licenses can be found at:
7
8 - CC0 1.0 Universal : https://creativecommons.org/publicdomain/zero/1.0
9 - OpenSSL license : https://www.openssl.org/source/license.html
10 - Apache 2.0 : https://www.apache.org/licenses/LICENSE-2.0
11
12 More information about the BLAKE2 hash function can be found at
13 https://blake2.net.
14 */
15 #ifndef BLAKE2_IMPL_H
16 #define BLAKE2_IMPL_H
17
18 #ifndef WORDS_BIGENDIAN
19 # define NATIVE_LITTLE_ENDIAN 1
20 #endif
21
22 #include <stdint.h>
23 #include <string.h>
24
25 #if !defined(__cplusplus) && (!defined(__STDC_VERSION__) || __STDC_VERSION__ < 199901L)
26 #if defined(_MSC_VER)
27 #define BLAKE2_INLINE __inline
28 #elif defined(__GNUC__)
29 #define BLAKE2_INLINE __inline__
30 #else
31 #define BLAKE2_INLINE
32 #endif
33 #else
34 #define BLAKE2_INLINE inline
35 #endif
36
load32(const void * src)37 static BLAKE2_INLINE uint32_t load32( const void *src )
38 {
39 #if defined(NATIVE_LITTLE_ENDIAN)
40 uint32_t w;
41 memcpy(&w, src, sizeof w);
42 return w;
43 #else
44 const uint8_t *p = ( const uint8_t * )src;
45 return (( uint32_t )( p[0] ) << 0) |
46 (( uint32_t )( p[1] ) << 8) |
47 (( uint32_t )( p[2] ) << 16) |
48 (( uint32_t )( p[3] ) << 24) ;
49 #endif
50 }
51
load64(const void * src)52 static BLAKE2_INLINE uint64_t load64( const void *src )
53 {
54 #if defined(NATIVE_LITTLE_ENDIAN)
55 uint64_t w;
56 memcpy(&w, src, sizeof w);
57 return w;
58 #else
59 const uint8_t *p = ( const uint8_t * )src;
60 return (( uint64_t )( p[0] ) << 0) |
61 (( uint64_t )( p[1] ) << 8) |
62 (( uint64_t )( p[2] ) << 16) |
63 (( uint64_t )( p[3] ) << 24) |
64 (( uint64_t )( p[4] ) << 32) |
65 (( uint64_t )( p[5] ) << 40) |
66 (( uint64_t )( p[6] ) << 48) |
67 (( uint64_t )( p[7] ) << 56) ;
68 #endif
69 }
70
load16(const void * src)71 static BLAKE2_INLINE uint16_t load16( const void *src )
72 {
73 #if defined(NATIVE_LITTLE_ENDIAN)
74 uint16_t w;
75 memcpy(&w, src, sizeof w);
76 return w;
77 #else
78 const uint8_t *p = ( const uint8_t * )src;
79 return ( uint16_t )((( uint32_t )( p[0] ) << 0) |
80 (( uint32_t )( p[1] ) << 8));
81 #endif
82 }
83
store16(void * dst,uint16_t w)84 static BLAKE2_INLINE void store16( void *dst, uint16_t w )
85 {
86 #if defined(NATIVE_LITTLE_ENDIAN)
87 memcpy(dst, &w, sizeof w);
88 #else
89 uint8_t *p = ( uint8_t * )dst;
90 *p++ = ( uint8_t )w; w >>= 8;
91 *p++ = ( uint8_t )w;
92 #endif
93 }
94
store32(void * dst,uint32_t w)95 static BLAKE2_INLINE void store32( void *dst, uint32_t w )
96 {
97 #if defined(NATIVE_LITTLE_ENDIAN)
98 memcpy(dst, &w, sizeof w);
99 #else
100 uint8_t *p = ( uint8_t * )dst;
101 p[0] = (uint8_t)(w >> 0);
102 p[1] = (uint8_t)(w >> 8);
103 p[2] = (uint8_t)(w >> 16);
104 p[3] = (uint8_t)(w >> 24);
105 #endif
106 }
107
store64(void * dst,uint64_t w)108 static BLAKE2_INLINE void store64( void *dst, uint64_t w )
109 {
110 #if defined(NATIVE_LITTLE_ENDIAN)
111 memcpy(dst, &w, sizeof w);
112 #else
113 uint8_t *p = ( uint8_t * )dst;
114 p[0] = (uint8_t)(w >> 0);
115 p[1] = (uint8_t)(w >> 8);
116 p[2] = (uint8_t)(w >> 16);
117 p[3] = (uint8_t)(w >> 24);
118 p[4] = (uint8_t)(w >> 32);
119 p[5] = (uint8_t)(w >> 40);
120 p[6] = (uint8_t)(w >> 48);
121 p[7] = (uint8_t)(w >> 56);
122 #endif
123 }
124
load48(const void * src)125 static BLAKE2_INLINE uint64_t load48( const void *src )
126 {
127 const uint8_t *p = ( const uint8_t * )src;
128 return (( uint64_t )( p[0] ) << 0) |
129 (( uint64_t )( p[1] ) << 8) |
130 (( uint64_t )( p[2] ) << 16) |
131 (( uint64_t )( p[3] ) << 24) |
132 (( uint64_t )( p[4] ) << 32) |
133 (( uint64_t )( p[5] ) << 40) ;
134 }
135
store48(void * dst,uint64_t w)136 static BLAKE2_INLINE void store48( void *dst, uint64_t w )
137 {
138 uint8_t *p = ( uint8_t * )dst;
139 p[0] = (uint8_t)(w >> 0);
140 p[1] = (uint8_t)(w >> 8);
141 p[2] = (uint8_t)(w >> 16);
142 p[3] = (uint8_t)(w >> 24);
143 p[4] = (uint8_t)(w >> 32);
144 p[5] = (uint8_t)(w >> 40);
145 }
146
rotr32(const uint32_t w,const unsigned c)147 static BLAKE2_INLINE uint32_t rotr32( const uint32_t w, const unsigned c )
148 {
149 return ( w >> c ) | ( w << ( 32 - c ) );
150 }
151
rotr64(const uint64_t w,const unsigned c)152 static BLAKE2_INLINE uint64_t rotr64( const uint64_t w, const unsigned c )
153 {
154 return ( w >> c ) | ( w << ( 64 - c ) );
155 }
156
157 /* prevents compiler optimizing out memset() */
secure_zero_memory(void * v,size_t n)158 static BLAKE2_INLINE void secure_zero_memory(void *v, size_t n)
159 {
160 static void *(*const volatile memset_v)(void *, int, size_t) = &memset;
161 memset_v(v, 0, n);
162 }
163
164 #endif
165