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218 lines
8.1 KiB
218 lines
8.1 KiB
// Copyright (c) 2014-2020, The Monero Project |
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// |
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// All rights reserved. |
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// |
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// Redistribution and use in source and binary forms, with or without modification, are |
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// permitted provided that the following conditions are met: |
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// |
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// 1. Redistributions of source code must retain the above copyright notice, this list of |
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// conditions and the following disclaimer. |
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// |
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list |
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// of conditions and the following disclaimer in the documentation and/or other |
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// materials provided with the distribution. |
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// |
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// 3. Neither the name of the copyright holder nor the names of its contributors may be |
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// used to endorse or promote products derived from this software without specific |
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// prior written permission. |
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// |
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY |
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL |
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF |
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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#ifndef _SKEIN_PORT_H_ |
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#define _SKEIN_PORT_H_ |
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#include <limits.h> |
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#include <stdint.h> |
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#ifndef RETURN_VALUES |
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# define RETURN_VALUES |
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# if defined( DLL_EXPORT ) |
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# if defined( _MSC_VER ) || defined ( __INTEL_COMPILER ) |
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# define VOID_RETURN __declspec( dllexport ) void __stdcall |
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# define INT_RETURN __declspec( dllexport ) int __stdcall |
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# elif defined( __GNUC__ ) |
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# define VOID_RETURN __declspec( __dllexport__ ) void |
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# define INT_RETURN __declspec( __dllexport__ ) int |
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# else |
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# error Use of the DLL is only available on the Microsoft, Intel and GCC compilers |
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# endif |
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# elif defined( DLL_IMPORT ) |
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# if defined( _MSC_VER ) || defined ( __INTEL_COMPILER ) |
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# define VOID_RETURN __declspec( dllimport ) void __stdcall |
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# define INT_RETURN __declspec( dllimport ) int __stdcall |
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# elif defined( __GNUC__ ) |
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# define VOID_RETURN __declspec( __dllimport__ ) void |
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# define INT_RETURN __declspec( __dllimport__ ) int |
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# else |
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# error Use of the DLL is only available on the Microsoft, Intel and GCC compilers |
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# endif |
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# elif defined( __WATCOMC__ ) |
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# define VOID_RETURN void __cdecl |
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# define INT_RETURN int __cdecl |
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# else |
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# define VOID_RETURN void |
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# define INT_RETURN int |
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# endif |
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#endif |
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/* These defines are used to declare buffers in a way that allows |
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faster operations on longer variables to be used. In all these |
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defines 'size' must be a power of 2 and >= 8 |
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dec_unit_type(size,x) declares a variable 'x' of length |
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'size' bits |
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dec_bufr_type(size,bsize,x) declares a buffer 'x' of length 'bsize' |
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bytes defined as an array of variables |
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each of 'size' bits (bsize must be a |
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multiple of size / 8) |
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ptr_cast(x,size) casts a pointer to a pointer to a |
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varaiable of length 'size' bits |
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*/ |
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#define ui_type(size) uint##size##_t |
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#define dec_unit_type(size,x) typedef ui_type(size) x |
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#define dec_bufr_type(size,bsize,x) typedef ui_type(size) x[bsize / (size >> 3)] |
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#define ptr_cast(x,size) ((ui_type(size)*)(x)) |
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typedef unsigned int uint_t; /* native unsigned integer */ |
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typedef uint8_t u08b_t; /* 8-bit unsigned integer */ |
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typedef uint64_t u64b_t; /* 64-bit unsigned integer */ |
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#ifndef RotL_64 |
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#define RotL_64(x,N) (((x) << (N)) | ((x) >> (64-(N)))) |
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#endif |
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/* |
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* Skein is "natively" little-endian (unlike SHA-xxx), for optimal |
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* performance on x86 CPUs. The Skein code requires the following |
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* definitions for dealing with endianness: |
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* |
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* SKEIN_NEED_SWAP: 0 for little-endian, 1 for big-endian |
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* Skein_Put64_LSB_First |
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* Skein_Get64_LSB_First |
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* Skein_Swap64 |
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* |
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* If SKEIN_NEED_SWAP is defined at compile time, it is used here |
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* along with the portable versions of Put64/Get64/Swap64, which |
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* are slow in general. |
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* |
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* Otherwise, an "auto-detect" of endianness is attempted below. |
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* If the default handling doesn't work well, the user may insert |
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* platform-specific code instead (e.g., for big-endian CPUs). |
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* |
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*/ |
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#ifndef SKEIN_NEED_SWAP /* compile-time "override" for endianness? */ |
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#include "int-util.h" |
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#define IS_BIG_ENDIAN 4321 /* byte 0 is most significant (mc68k) */ |
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#define IS_LITTLE_ENDIAN 1234 /* byte 0 is least significant (i386) */ |
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#if BYTE_ORDER == LITTLE_ENDIAN |
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# define PLATFORM_BYTE_ORDER IS_LITTLE_ENDIAN |
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#endif |
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#if BYTE_ORDER == BIG_ENDIAN |
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# define PLATFORM_BYTE_ORDER IS_BIG_ENDIAN |
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#endif |
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/* special handler for IA64, which may be either endianness (?) */ |
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/* here we assume little-endian, but this may need to be changed */ |
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#if defined(__ia64) || defined(__ia64__) || defined(_M_IA64) |
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# define PLATFORM_MUST_ALIGN (1) |
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#ifndef PLATFORM_BYTE_ORDER |
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# define PLATFORM_BYTE_ORDER IS_LITTLE_ENDIAN |
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#endif |
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#endif |
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#ifndef PLATFORM_MUST_ALIGN |
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# define PLATFORM_MUST_ALIGN (0) |
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#endif |
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#if PLATFORM_BYTE_ORDER == IS_BIG_ENDIAN |
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/* here for big-endian CPUs */ |
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#define SKEIN_NEED_SWAP (1) |
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#elif PLATFORM_BYTE_ORDER == IS_LITTLE_ENDIAN |
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/* here for x86 and x86-64 CPUs (and other detected little-endian CPUs) */ |
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#define SKEIN_NEED_SWAP (0) |
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#if PLATFORM_MUST_ALIGN == 0 /* ok to use "fast" versions? */ |
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#define Skein_Put64_LSB_First(dst08,src64,bCnt) memcpy(dst08,src64,bCnt) |
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#define Skein_Get64_LSB_First(dst64,src08,wCnt) memcpy(dst64,src08,8*(wCnt)) |
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#endif |
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#else |
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#error "Skein needs endianness setting!" |
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#endif |
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#endif /* ifndef SKEIN_NEED_SWAP */ |
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/* |
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****************************************************************** |
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* Provide any definitions still needed. |
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****************************************************************** |
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*/ |
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#ifndef Skein_Swap64 /* swap for big-endian, nop for little-endian */ |
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#if SKEIN_NEED_SWAP |
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#define Skein_Swap64(w64) \ |
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( (( ((u64b_t)(w64)) & 0xFF) << 56) | \ |
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(((((u64b_t)(w64)) >> 8) & 0xFF) << 48) | \ |
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(((((u64b_t)(w64)) >>16) & 0xFF) << 40) | \ |
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(((((u64b_t)(w64)) >>24) & 0xFF) << 32) | \ |
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(((((u64b_t)(w64)) >>32) & 0xFF) << 24) | \ |
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(((((u64b_t)(w64)) >>40) & 0xFF) << 16) | \ |
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(((((u64b_t)(w64)) >>48) & 0xFF) << 8) | \ |
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(((((u64b_t)(w64)) >>56) & 0xFF) ) ) |
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#else |
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#define Skein_Swap64(w64) (w64) |
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#endif |
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#endif /* ifndef Skein_Swap64 */ |
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#ifndef Skein_Put64_LSB_First |
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void Skein_Put64_LSB_First(u08b_t *dst,const u64b_t *src,size_t bCnt) |
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#ifdef SKEIN_PORT_CODE /* instantiate the function code here? */ |
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{ /* this version is fully portable (big-endian or little-endian), but slow */ |
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size_t n; |
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for (n=0;n<bCnt;n++) |
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dst[n] = (u08b_t) (src[n>>3] >> (8*(n&7))); |
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} |
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#else |
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; /* output only the function prototype */ |
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#endif |
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#endif /* ifndef Skein_Put64_LSB_First */ |
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#ifndef Skein_Get64_LSB_First |
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void Skein_Get64_LSB_First(u64b_t *dst,const u08b_t *src,size_t wCnt) |
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#ifdef SKEIN_PORT_CODE /* instantiate the function code here? */ |
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{ /* this version is fully portable (big-endian or little-endian), but slow */ |
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size_t n; |
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for (n=0;n<8*wCnt;n+=8) |
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dst[n/8] = (((u64b_t) src[n ]) ) + |
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(((u64b_t) src[n+1]) << 8) + |
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(((u64b_t) src[n+2]) << 16) + |
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(((u64b_t) src[n+3]) << 24) + |
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(((u64b_t) src[n+4]) << 32) + |
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(((u64b_t) src[n+5]) << 40) + |
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(((u64b_t) src[n+6]) << 48) + |
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(((u64b_t) src[n+7]) << 56) ; |
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} |
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#else |
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; /* output only the function prototype */ |
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#endif |
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#endif /* ifndef Skein_Get64_LSB_First */ |
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#endif /* ifndef _SKEIN_PORT_H_ */
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