release/src/router/libsodium/src/libsodium/crypto_generichash/blake2/ref/blake2-impl.h

   1 /*
   2    BLAKE2 reference source code package - reference C implementations
   3
   4    Written in 2012 by Samuel Neves <sneves@dei.uc.pt>
   5
   6    To the extent possible under law, the author(s) have dedicated all copyright
   7    and related and neighboring rights to this software to the public domain
   8    worldwide. This software is distributed without any warranty.
   9
  10    You should have received a copy of the CC0 Public Domain Dedication along with
  11    this software. If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
  12 */
  13
  14 #ifndef blake2_impl_H
  15 #define blake2_impl_H
  16
  17 #include <stdint.h>
  18 #include <string.h>
  19
  20 #include "utils.h"
  21
  22 static inline uint32_t load32( const void *src )
  23 {
  24 #ifdef NATIVE_LITTLE_ENDIAN
  25   uint32_t w;
  26   memcpy(&w, src, sizeof w);
  27   return w;
  28 #else
  29   const uint8_t *p = ( const uint8_t * )src;
  30   uint32_t w = *p++;
  31   w |= ( uint32_t )( *p++ ) <<  8;
  32   w |= ( uint32_t )( *p++ ) << 16;
  33   w |= ( uint32_t )( *p++ ) << 24;
  34   return w;
  35 #endif
  36 }
  37
  38 static inline uint64_t load64( const void *src )
  39 {
  40 #ifdef NATIVE_LITTLE_ENDIAN
  41   uint64_t w;
  42   memcpy(&w, src, sizeof w);
  43   return w;
  44 #else
  45   const uint8_t *p = ( const uint8_t * )src;
  46   uint64_t w = *p++;
  47   w |= ( uint64_t )( *p++ ) <<  8;
  48   w |= ( uint64_t )( *p++ ) << 16;
  49   w |= ( uint64_t )( *p++ ) << 24;
  50   w |= ( uint64_t )( *p++ ) << 32;
  51   w |= ( uint64_t )( *p++ ) << 40;
  52   w |= ( uint64_t )( *p++ ) << 48;
  53   w |= ( uint64_t )( *p++ ) << 56;
  54   return w;
  55 #endif
  56 }
  57
  58 static inline void store32( void *dst, uint32_t w )
  59 {
  60 #ifdef NATIVE_LITTLE_ENDIAN
  61   memcpy(dst, &w, sizeof w);
  62 #else
  63   uint8_t *p = ( uint8_t * )dst;
  64   *p++ = ( uint8_t )w; w >>= 8;
  65   *p++ = ( uint8_t )w; w >>= 8;
  66   *p++ = ( uint8_t )w; w >>= 8;
  67   *p++ = ( uint8_t )w;
  68 #endif
  69 }
  70
  71 static inline void store64( void *dst, uint64_t w )
  72 {
  73 #ifdef NATIVE_LITTLE_ENDIAN
  74   memcpy(dst, &w, sizeof w);
  75 #else
  76   uint8_t *p = ( uint8_t * )dst;
  77   *p++ = ( uint8_t )w; w >>= 8;
  78   *p++ = ( uint8_t )w; w >>= 8;
  79   *p++ = ( uint8_t )w; w >>= 8;
  80   *p++ = ( uint8_t )w; w >>= 8;
  81   *p++ = ( uint8_t )w; w >>= 8;
  82   *p++ = ( uint8_t )w; w >>= 8;
  83   *p++ = ( uint8_t )w; w >>= 8;
  84   *p++ = ( uint8_t )w;
  85 #endif
  86 }
  87
  88 static inline uint64_t load48( const void *src )
  89 {
  90   const uint8_t *p = ( const uint8_t * )src;
  91   uint64_t w = *p++;
  92   w |= ( uint64_t )( *p++ ) <<  8;
  93   w |= ( uint64_t )( *p++ ) << 16;
  94   w |= ( uint64_t )( *p++ ) << 24;
  95   w |= ( uint64_t )( *p++ ) << 32;
  96   w |= ( uint64_t )( *p++ ) << 40;
  97   return w;
  98 }
  99
 100 static inline void store48( void *dst, uint64_t w )
 101 {
 102   uint8_t *p = ( uint8_t * )dst;
 103   *p++ = ( uint8_t )w; w >>= 8;
 104   *p++ = ( uint8_t )w; w >>= 8;
 105   *p++ = ( uint8_t )w; w >>= 8;
 106   *p++ = ( uint8_t )w; w >>= 8;
 107   *p++ = ( uint8_t )w; w >>= 8;
 108   *p++ = ( uint8_t )w;
 109 }
 110
 111 static inline uint32_t rotl32( const uint32_t w, const unsigned c )
 112 {
 113   return ( w << c ) | ( w >> ( 32 - c ) );
 114 }
 115
 116 static inline uint64_t rotl64( const uint64_t w, const unsigned c )
 117 {
 118   return ( w << c ) | ( w >> ( 64 - c ) );
 119 }
 120
 121 static inline uint32_t rotr32( const uint32_t w, const unsigned c )
 122 {
 123   return ( w >> c ) | ( w << ( 32 - c ) );
 124 }
 125
 126 static inline uint64_t rotr64( const uint64_t w, const unsigned c )
 127 {
 128   return ( w >> c ) | ( w << ( 64 - c ) );
 129 }
 130
 131 /* prevents compiler optimizing out memset() */
 132 static inline void secure_zero_memory( void *v, size_t n )
 133 {
 134   sodium_memzero(v, n);
 135 }
 136
 137 #endif