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162 lines
3.9 KiB
C
162 lines
3.9 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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#if defined(_WIN32) || defined(WIN32)
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#include <windows.h>
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#endif
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#include <stddef.h>
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#include <stdint.h>
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#include <string.h>
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#define BLAKE2_IMPL_CAT(x,y) x ## y
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#define BLAKE2_IMPL_EVAL(x,y) BLAKE2_IMPL_CAT(x,y)
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#define BLAKE2_IMPL_NAME(fun) BLAKE2_IMPL_EVAL(fun, SUFFIX)
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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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uint32_t w;
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memcpy( &w, src, sizeof( w ) );
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return w;
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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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uint64_t w;
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memcpy( &w, src, sizeof( w ) );
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return w;
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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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memcpy( dst, &w, sizeof( 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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memcpy( dst, &w, sizeof( 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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#if defined(_WIN32) || defined(WIN32)
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SecureZeroMemory(v, n);
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#elif defined(__hpux)
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static void *(*const volatile memset_v)(void *, int, size_t) = &memset;
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memset_v(v, 0, n);
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#else
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// prioritize first the general C11 call
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#if defined(HAVE_MEMSET_S)
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memset_s(v, n, 0, n);
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#elif defined(HAVE_EXPLICIT_BZERO)
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explicit_bzero(v, n);
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#elif defined(HAVE_EXPLICIT_MEMSET)
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explicit_memset(v, 0, n);
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#else
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memset(v, 0, n);
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__asm__ __volatile__("" :: "r"(v) : "memory");
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#endif
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#endif
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}
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#endif
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