133 lines
3.2 KiB
C
133 lines
3.2 KiB
C
/*
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BLAKE2 reference source code package - optimized C implementations
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Written in 2012 by Samuel Neves <sneves@dei.uc.pt>
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To the extent possible under law, the author(s) have dedicated all copyright
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and related and neighboring rights to this software to the public domain
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worldwide. This software is distributed without any warranty.
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You should have received a copy of the CC0 Public Domain Dedication along with
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this software. If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
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*/
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#pragma once
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#ifndef __BLAKE2_IMPL_H__
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#define __BLAKE2_IMPL_H__
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#include <stdint.h>
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static inline uint32_t load32( const void *src )
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{
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#if defined(NATIVE_LITTLE_ENDIAN)
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return *( uint32_t * )( src );
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#else
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const uint8_t *p = ( uint8_t * )src;
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uint32_t w = *p++;
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w |= ( uint32_t )( *p++ ) << 8;
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w |= ( uint32_t )( *p++ ) << 16;
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w |= ( uint32_t )( *p++ ) << 24;
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return w;
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#endif
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}
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static inline uint64_t load64( const void *src )
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{
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#if defined(NATIVE_LITTLE_ENDIAN)
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return *( uint64_t * )( src );
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#else
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const uint8_t *p = ( uint8_t * )src;
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uint64_t w = *p++;
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w |= ( uint64_t )( *p++ ) << 8;
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w |= ( uint64_t )( *p++ ) << 16;
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w |= ( uint64_t )( *p++ ) << 24;
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w |= ( uint64_t )( *p++ ) << 32;
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w |= ( uint64_t )( *p++ ) << 40;
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w |= ( uint64_t )( *p++ ) << 48;
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w |= ( uint64_t )( *p++ ) << 56;
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return w;
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#endif
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}
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static inline void store32( void *dst, uint32_t w )
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{
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#if defined(NATIVE_LITTLE_ENDIAN)
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*( uint32_t * )( dst ) = w;
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#else
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uint8_t *p = ( uint8_t * )dst;
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*p++ = ( uint8_t )w; w >>= 8;
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*p++ = ( uint8_t )w; w >>= 8;
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*p++ = ( uint8_t )w; w >>= 8;
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*p++ = ( uint8_t )w;
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#endif
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}
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static inline void store64( void *dst, uint64_t w )
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{
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#if defined(NATIVE_LITTLE_ENDIAN)
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*( uint64_t * )( dst ) = w;
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#else
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uint8_t *p = ( uint8_t * )dst;
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*p++ = ( uint8_t )w; w >>= 8;
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*p++ = ( uint8_t )w; w >>= 8;
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*p++ = ( uint8_t )w; w >>= 8;
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*p++ = ( uint8_t )w; w >>= 8;
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*p++ = ( uint8_t )w; w >>= 8;
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*p++ = ( uint8_t )w; w >>= 8;
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*p++ = ( uint8_t )w; w >>= 8;
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*p++ = ( uint8_t )w;
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#endif
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}
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static inline uint64_t load48( const void *src )
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{
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const uint8_t *p = ( const uint8_t * )src;
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uint64_t w = *p++;
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w |= ( uint64_t )( *p++ ) << 8;
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w |= ( uint64_t )( *p++ ) << 16;
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w |= ( uint64_t )( *p++ ) << 24;
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w |= ( uint64_t )( *p++ ) << 32;
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w |= ( uint64_t )( *p++ ) << 40;
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return w;
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}
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static inline void store48( void *dst, uint64_t w )
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{
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uint8_t *p = ( uint8_t * )dst;
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*p++ = ( uint8_t )w; w >>= 8;
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*p++ = ( uint8_t )w; w >>= 8;
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*p++ = ( uint8_t )w; w >>= 8;
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*p++ = ( uint8_t )w; w >>= 8;
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*p++ = ( uint8_t )w; w >>= 8;
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*p++ = ( uint8_t )w;
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}
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static inline uint32_t rotl32( const uint32_t w, const unsigned c )
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{
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return ( w << c ) | ( w >> ( 32 - c ) );
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}
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static inline uint64_t rotl64( const uint64_t w, const unsigned c )
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{
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return ( w << c ) | ( w >> ( 64 - c ) );
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}
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static inline uint32_t rotr32( const uint32_t w, const unsigned c )
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{
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return ( w >> c ) | ( w << ( 32 - c ) );
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}
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static inline uint64_t rotr64( const uint64_t w, const unsigned c )
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{
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return ( w >> c ) | ( w << ( 64 - c ) );
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}
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/* prevents compiler optimizing out memset() */
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static inline void secure_zero_memory( void *v, size_t n )
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{
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volatile uint8_t *p = ( volatile uint8_t * )v;
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while( n-- ) *p++ = 0;
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}
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#endif
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