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156 lines
4.0 KiB
C
156 lines
4.0 KiB
C
/*
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BLAKE2 reference source code package - reference 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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/* blake2-impl.h
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*
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* Copyright (C) 2006-2021 wolfSSL Inc.
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*
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* This file is part of wolfSSL.
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*
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* wolfSSL is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* wolfSSL is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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*/
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#ifndef WOLFCRYPT_BLAKE2_IMPL_H
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#define WOLFCRYPT_BLAKE2_IMPL_H
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#include <libwolfssl/wolfcrypt/types.h>
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static WC_INLINE word32 load32( const void *src )
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{
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#if defined(LITTLE_ENDIAN_ORDER)
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return *( word32 * )( src );
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#else
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const byte *p = ( byte * )src;
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word32 w = *p++;
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w |= ( word32 )( *p++ ) << 8;
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w |= ( word32 )( *p++ ) << 16;
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w |= ( word32 )( *p++ ) << 24;
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return w;
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#endif
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}
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static WC_INLINE word64 load64( const void *src )
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{
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#if defined(LITTLE_ENDIAN_ORDER)
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return *( word64 * )( src );
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#else
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const byte *p = ( byte * )src;
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word64 w = *p++;
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w |= ( word64 )( *p++ ) << 8;
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w |= ( word64 )( *p++ ) << 16;
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w |= ( word64 )( *p++ ) << 24;
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w |= ( word64 )( *p++ ) << 32;
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w |= ( word64 )( *p++ ) << 40;
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w |= ( word64 )( *p++ ) << 48;
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w |= ( word64 )( *p++ ) << 56;
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return w;
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#endif
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}
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static WC_INLINE void store32( void *dst, word32 w )
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{
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#if defined(LITTLE_ENDIAN_ORDER)
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*( word32 * )( dst ) = w;
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#else
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byte *p = ( byte * )dst;
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*p++ = ( byte )w; w >>= 8;
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*p++ = ( byte )w; w >>= 8;
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*p++ = ( byte )w; w >>= 8;
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*p++ = ( byte )w;
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#endif
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}
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static WC_INLINE void store64( void *dst, word64 w )
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{
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#if defined(LITTLE_ENDIAN_ORDER) && !defined(WOLFSSL_GENERAL_ALIGNMENT)
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*( word64 * )( dst ) = w;
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#else
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byte *p = ( byte * )dst;
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*p++ = ( byte )w; w >>= 8;
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*p++ = ( byte )w; w >>= 8;
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*p++ = ( byte )w; w >>= 8;
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*p++ = ( byte )w; w >>= 8;
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*p++ = ( byte )w; w >>= 8;
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*p++ = ( byte )w; w >>= 8;
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*p++ = ( byte )w; w >>= 8;
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*p++ = ( byte )w;
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#endif
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}
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static WC_INLINE word64 load48( const void *src )
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{
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const byte *p = ( const byte * )src;
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word64 w = *p++;
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w |= ( word64 )( *p++ ) << 8;
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w |= ( word64 )( *p++ ) << 16;
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w |= ( word64 )( *p++ ) << 24;
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w |= ( word64 )( *p++ ) << 32;
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w |= ( word64 )( *p++ ) << 40;
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return w;
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}
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static WC_INLINE void store48( void *dst, word64 w )
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{
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byte *p = ( byte * )dst;
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*p++ = ( byte )w; w >>= 8;
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*p++ = ( byte )w; w >>= 8;
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*p++ = ( byte )w; w >>= 8;
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*p++ = ( byte )w; w >>= 8;
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*p++ = ( byte )w; w >>= 8;
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*p++ = ( byte )w;
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}
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static WC_INLINE word32 rotl32( const word32 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 WC_INLINE word64 rotl64( const word64 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 WC_INLINE word32 rotr32( const word32 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 WC_INLINE word64 rotr64( const word64 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 WC_INLINE void secure_zero_memory( void *v, word64 n )
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{
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volatile byte *p = ( volatile byte * )v;
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while( n-- ) *p++ = 0;
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}
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#endif /* WOLFCRYPT_BLAKE2_IMPL_H */
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