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
  19 #include "utils.h"
  20
  21 static inline uint32_t load32( const void *src )
  22 {
  23 #if defined(NATIVE_LITTLE_ENDIAN)
  24   return *( uint32_t * )( src );
  25 #else
  26   const uint8_t *p = ( uint8_t * )src;
  27   uint32_t w = *p++;
  28   w |= ( uint32_t )( *p++ ) <<  8;
  29   w |= ( uint32_t )( *p++ ) << 16;
  30   w |= ( uint32_t )( *p++ ) << 24;
  31   return w;
  32 #endif
  33 }
  34
  35 static inline uint64_t load64( const void *src )
  36 {
  37 #if defined(NATIVE_LITTLE_ENDIAN)
  38   return *( uint64_t * )( src );
  39 #else
  40   const uint8_t *p = ( uint8_t * )src;
  41   uint64_t w = *p++;
  42   w |= ( uint64_t )( *p++ ) <<  8;
  43   w |= ( uint64_t )( *p++ ) << 16;
  44   w |= ( uint64_t )( *p++ ) << 24;
  45   w |= ( uint64_t )( *p++ ) << 32;
  46   w |= ( uint64_t )( *p++ ) << 40;
  47   w |= ( uint64_t )( *p++ ) << 48;
  48   w |= ( uint64_t )( *p++ ) << 56;
  49   return w;
  50 #endif
  51 }
  52
  53 static inline void store32( void *dst, uint32_t w )
  54 {
  55 #if defined(NATIVE_LITTLE_ENDIAN)
  56   *( uint32_t * )( dst ) = w;
  57 #else
  58   uint8_t *p = ( uint8_t * )dst;
  59   *p++ = ( uint8_t )w; w >>= 8;
  60   *p++ = ( uint8_t )w; w >>= 8;
  61   *p++ = ( uint8_t )w; w >>= 8;
  62   *p++ = ( uint8_t )w;
  63 #endif
  64 }
  65
  66 static inline void store64( void *dst, uint64_t w )
  67 {
  68 #if defined(NATIVE_LITTLE_ENDIAN)
  69   *( uint64_t * )( dst ) = w;
  70 #else
  71   uint8_t *p = ( uint8_t * )dst;
  72   *p++ = ( uint8_t )w; w >>= 8;
  73   *p++ = ( uint8_t )w; w >>= 8;
  74   *p++ = ( uint8_t )w; w >>= 8;
  75   *p++ = ( uint8_t )w; w >>= 8;
  76   *p++ = ( uint8_t )w; w >>= 8;
  77   *p++ = ( uint8_t )w; w >>= 8;
  78   *p++ = ( uint8_t )w; w >>= 8;
  79   *p++ = ( uint8_t )w;
  80 #endif
  81 }
  82
  83 static inline uint64_t load48( const void *src )
  84 {
  85   const uint8_t *p = ( const uint8_t * )src;
  86   uint64_t w = *p++;
  87   w |= ( uint64_t )( *p++ ) <<  8;
  88   w |= ( uint64_t )( *p++ ) << 16;
  89   w |= ( uint64_t )( *p++ ) << 24;
  90   w |= ( uint64_t )( *p++ ) << 32;
  91   w |= ( uint64_t )( *p++ ) << 40;
  92   return w;
  93 }
  94
  95 static inline void store48( void *dst, uint64_t w )
  96 {
  97   uint8_t *p = ( uint8_t * )dst;
  98   *p++ = ( uint8_t )w; w >>= 8;
  99   *p++ = ( uint8_t )w; w >>= 8;
 100   *p++ = ( uint8_t )w; w >>= 8;
 101   *p++ = ( uint8_t )w; w >>= 8;
 102   *p++ = ( uint8_t )w; w >>= 8;
 103   *p++ = ( uint8_t )w;
 104 }
 105
 106 static inline uint32_t rotl32( const uint32_t w, const unsigned c )
 107 {
 108   return ( w << c ) | ( w >> ( 32 - c ) );
 109 }
 110
 111 static inline uint64_t rotl64( const uint64_t w, const unsigned c )
 112 {
 113   return ( w << c ) | ( w >> ( 64 - c ) );
 114 }
 115
 116 static inline uint32_t rotr32( const uint32_t w, const unsigned c )
 117 {
 118   return ( w >> c ) | ( w << ( 32 - c ) );
 119 }
 120
 121 static inline uint64_t rotr64( const uint64_t w, const unsigned c )
 122 {
 123   return ( w >> c ) | ( w << ( 64 - c ) );
 124 }
 125
 126 /* prevents compiler optimizing out memset() */
 127 static inline void secure_zero_memory( void *v, size_t n )
 128 {
 129   sodium_memzero(v, n);
 130 }
 131
 132 #endif