#ifndef _SKEIN_PORT_H_ #define _SKEIN_PORT_H_ #include #include #include #ifndef RETURN_VALUES # define RETURN_VALUES # if defined( DLL_EXPORT ) # if defined( _MSC_VER ) || defined ( __INTEL_COMPILER ) # define VOID_RETURN __declspec( dllexport ) void __stdcall # define INT_RETURN __declspec( dllexport ) int __stdcall # elif defined( __GNUC__ ) # define VOID_RETURN __declspec( __dllexport__ ) void # define INT_RETURN __declspec( __dllexport__ ) int # else # error Use of the DLL is only available on the Microsoft, Intel and GCC compilers # endif # elif defined( DLL_IMPORT ) # if defined( _MSC_VER ) || defined ( __INTEL_COMPILER ) # define VOID_RETURN __declspec( dllimport ) void __stdcall # define INT_RETURN __declspec( dllimport ) int __stdcall # elif defined( __GNUC__ ) # define VOID_RETURN __declspec( __dllimport__ ) void # define INT_RETURN __declspec( __dllimport__ ) int # else # error Use of the DLL is only available on the Microsoft, Intel and GCC compilers # endif # elif defined( __WATCOMC__ ) # define VOID_RETURN void __cdecl # define INT_RETURN int __cdecl # else # define VOID_RETURN void # define INT_RETURN int # endif #endif /* These defines are used to declare buffers in a way that allows faster operations on longer variables to be used. In all these defines 'size' must be a power of 2 and >= 8 dec_unit_type(size,x) declares a variable 'x' of length 'size' bits dec_bufr_type(size,bsize,x) declares a buffer 'x' of length 'bsize' bytes defined as an array of variables each of 'size' bits (bsize must be a multiple of size / 8) ptr_cast(x,size) casts a pointer to a pointer to a variable of length 'size' bits */ #define ui_type(size) uint##size##_t #define dec_unit_type(size,x) typedef ui_type(size) x #define dec_bufr_type(size,bsize,x) typedef ui_type(size) x[bsize / (size >> 3)] #define ptr_cast(x,size) ((ui_type(size)*)(x)) typedef unsigned int uint_t; /* native unsigned integer */ typedef uint8_t u08b_t; /* 8-bit unsigned integer */ typedef uint64_t u64b_t; /* 64-bit unsigned integer */ #ifndef RotL_64 #define RotL_64(x,N) (((x) << (N)) | ((x) >> (64-(N)))) #endif /* * Skein is "natively" little-endian (unlike SHA-xxx), for optimal * performance on x86 CPUs. The Skein code requires the following * definitions for dealing with endianness: * * SKEIN_NEED_SWAP: 0 for little-endian, 1 for big-endian * Skein_Put64_LSB_First * Skein_Get64_LSB_First * Skein_Swap64 * * If SKEIN_NEED_SWAP is defined at compile time, it is used here * along with the portable versions of Put64/Get64/Swap64, which * are slow in general. * * Otherwise, an "auto-detect" of endianness is attempted below. * If the default handling doesn't work well, the user may insert * platform-specific code instead (e.g., for big-endian CPUs). * */ #ifndef SKEIN_NEED_SWAP /* compile-time "override" for endianness? */ #define PLATFORM_BYTE_ORDER IS_LITTLE_ENDIAN /* special handler for IA64, which may be either endianness (?) */ /* here we assume little-endian, but this may need to be changed */ #if defined(__ia64) || defined(__ia64__) || defined(_M_IA64) # define PLATFORM_MUST_ALIGN (1) #ifndef PLATFORM_BYTE_ORDER # define PLATFORM_BYTE_ORDER IS_LITTLE_ENDIAN #endif #endif #ifndef PLATFORM_MUST_ALIGN # define PLATFORM_MUST_ALIGN (0) #endif #if PLATFORM_BYTE_ORDER == IS_BIG_ENDIAN /* here for big-endian CPUs */ #define SKEIN_NEED_SWAP (1) #elif PLATFORM_BYTE_ORDER == IS_LITTLE_ENDIAN /* here for x86 and x86-64 CPUs (and other detected little-endian CPUs) */ #define SKEIN_NEED_SWAP (0) #if PLATFORM_MUST_ALIGN == 0 /* ok to use "fast" versions? */ #define Skein_Put64_LSB_First(dst08,src64,bCnt) memcpy(dst08,src64,bCnt) #define Skein_Get64_LSB_First(dst64,src08,wCnt) memcpy(dst64,src08,8*(wCnt)) #endif #else #error "Skein needs endianness setting!" #endif #endif /* ifndef SKEIN_NEED_SWAP */ /* ****************************************************************** * Provide any definitions still needed. ****************************************************************** */ #ifndef Skein_Swap64 /* swap for big-endian, nop for little-endian */ #if SKEIN_NEED_SWAP #define Skein_Swap64(w64) \ ( (( ((u64b_t)(w64)) & 0xFF) << 56) | \ (((((u64b_t)(w64)) >> 8) & 0xFF) << 48) | \ (((((u64b_t)(w64)) >>16) & 0xFF) << 40) | \ (((((u64b_t)(w64)) >>24) & 0xFF) << 32) | \ (((((u64b_t)(w64)) >>32) & 0xFF) << 24) | \ (((((u64b_t)(w64)) >>40) & 0xFF) << 16) | \ (((((u64b_t)(w64)) >>48) & 0xFF) << 8) | \ (((((u64b_t)(w64)) >>56) & 0xFF) ) ) #else #define Skein_Swap64(w64) (w64) #endif #endif /* ifndef Skein_Swap64 */ #ifndef Skein_Put64_LSB_First void Skein_Put64_LSB_First(u08b_t *dst,const u64b_t *src,size_t bCnt) #ifdef SKEIN_PORT_CODE /* instantiate the function code here? */ { /* this version is fully portable (big-endian or little-endian), but slow */ size_t n; for (n=0;n>3] >> (8*(n&7))); } #else ; /* output only the function prototype */ #endif #endif /* ifndef Skein_Put64_LSB_First */ #ifndef Skein_Get64_LSB_First void Skein_Get64_LSB_First(u64b_t *dst,const u08b_t *src,size_t wCnt) #ifdef SKEIN_PORT_CODE /* instantiate the function code here? */ { /* this version is fully portable (big-endian or little-endian), but slow */ size_t n; for (n=0;n<8*wCnt;n+=8) dst[n/8] = (((u64b_t) src[n ]) ) + (((u64b_t) src[n+1]) << 8) + (((u64b_t) src[n+2]) << 16) + (((u64b_t) src[n+3]) << 24) + (((u64b_t) src[n+4]) << 32) + (((u64b_t) src[n+5]) << 40) + (((u64b_t) src[n+6]) << 48) + (((u64b_t) src[n+7]) << 56) ; } #else ; /* output only the function prototype */ #endif #endif /* ifndef Skein_Get64_LSB_First */ #endif /* ifndef _SKEIN_PORT_H_ */