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139 lines
3.5 KiB
C
139 lines
3.5 KiB
C
/*
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BLAKE2 reference source code package - optimized C implementations
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Copyright 2012, Samuel Neves <sneves@dei.uc.pt>. You may use this under the
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terms of the CC0, the OpenSSL Licence, or the Apache Public License 2.0, at
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your option. The terms of these licenses can be found at:
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- CC0 1.0 Universal : http://creativecommons.org/publicdomain/zero/1.0
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- OpenSSL license : https://www.openssl.org/source/license.html
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- Apache 2.0 : http://www.apache.org/licenses/LICENSE-2.0
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More information about the BLAKE2 hash function can be found at
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https://blake2.net.
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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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#include <string.h>
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BLAKE2_LOCAL_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 = ( const 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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BLAKE2_LOCAL_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 = ( 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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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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BLAKE2_LOCAL_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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BLAKE2_LOCAL_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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BLAKE2_LOCAL_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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BLAKE2_LOCAL_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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BLAKE2_LOCAL_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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BLAKE2_LOCAL_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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BLAKE2_LOCAL_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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BLAKE2_LOCAL_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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BLAKE2_LOCAL_INLINE(void) secure_zero_memory(void *v, size_t n)
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{
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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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}
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#endif
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