1#ifndef _SKEIN_PORT_H_ 2#define _SKEIN_PORT_H_ 3/******************************************************************* 4** 5** Platform-specific definitions for Skein hash function. 6** 7** Source code author: Doug Whiting, 2008. 8** 9** This algorithm and source code is released to the public domain. 10** 11** Many thanks to Brian Gladman for his portable header files. 12** 13** To port Skein to an "unsupported" platform, change the definitions 14** in this file appropriately. 15** 16********************************************************************/ 17 18#include <sys/endian.h> 19#include <sys/types.h> 20 21#ifndef _SPL_SYS_TYPES_H_ /* Avoid redefining this typedef */ 22typedef unsigned int uint_t; /* native unsigned integer */ 23#endif 24typedef uint8_t u08b_t; /* 8-bit unsigned integer */ 25typedef uint32_t uint_32t; /* 32-bit unsigned integer */ 26typedef uint64_t u64b_t; /* 64-bit unsigned integer */ 27 28#ifndef RotL_64 29#define RotL_64(x,N) (((x) << (N)) | ((x) >> (64-(N)))) 30#endif 31 32__BEGIN_DECLS 33 34/* 35 * Skein is "natively" little-endian (unlike SHA-xxx), for optimal 36 * performance on x86 CPUs. The Skein code requires the following 37 * definitions for dealing with endianness: 38 * 39 * SKEIN_NEED_SWAP: 0 for little-endian, 1 for big-endian 40 * Skein_Put64_LSB_First 41 * Skein_Get64_LSB_First 42 * Skein_Swap64 43 * 44 * If SKEIN_NEED_SWAP is defined at compile time, it is used here 45 * along with the portable versions of Put64/Get64/Swap64, which 46 * are slow in general. 47 * 48 * Otherwise, an "auto-detect" of endianness is attempted below. 49 * If the default handling doesn't work well, the user may insert 50 * platform-specific code instead (e.g., for big-endian CPUs). 51 * 52 */ 53#ifndef SKEIN_NEED_SWAP /* compile-time "override" for endianness? */ 54 55#if BYTE_ORDER == BIG_ENDIAN 56 /* here for big-endian CPUs */ 57#define SKEIN_NEED_SWAP (1) 58#ifdef SKEIN_PORT_CODE 59void Skein_Put64_LSB_First(u08b_t *dst,const u64b_t *src,size_t bCnt); 60void Skein_Get64_LSB_First(u64b_t *dst,const u08b_t *src,size_t wCnt); 61#endif /* ifdef SKEIN_PORT_CODE */ 62#elif BYTE_ORDER == LITTLE_ENDIAN 63 /* here for x86 and x86-64 CPUs (and other detected little-endian CPUs) */ 64#define SKEIN_NEED_SWAP (0) 65#define Skein_Put64_LSB_First(dst08,src64,bCnt) memcpy(dst08,src64,bCnt) 66#define Skein_Get64_LSB_First(dst64,src08,wCnt) memcpy(dst64,src08,8*(wCnt)) 67#else 68#error "Skein needs endianness setting!" 69#endif 70 71#endif /* ifndef SKEIN_NEED_SWAP */ 72 73/* 74 ****************************************************************** 75 * Provide any definitions still needed. 76 ****************************************************************** 77 */ 78#ifndef Skein_Swap64 /* swap for big-endian, nop for little-endian */ 79#if SKEIN_NEED_SWAP 80#define Skein_Swap64(w64) bswap64(w64) 81#else 82#define Skein_Swap64(w64) (w64) 83#endif 84#endif /* ifndef Skein_Swap64 */ 85 86 87#ifndef Skein_Put64_LSB_First 88void Skein_Put64_LSB_First(u08b_t *dst,const u64b_t *src,size_t bCnt) 89#ifdef SKEIN_PORT_CODE /* instantiate the function code here? */ 90{ 91 size_t n; 92 93 for (n = 0; n < bCnt / 8; n++) 94 le64enc(dst + n * 8, src[n]); 95} 96#else 97; /* output only the function prototype */ 98#endif 99#endif /* ifndef Skein_Put64_LSB_First */ 100 101 102#ifndef Skein_Get64_LSB_First 103void Skein_Get64_LSB_First(u64b_t *dst,const u08b_t *src,size_t wCnt) 104#ifdef SKEIN_PORT_CODE /* instantiate the function code here? */ 105{ 106 size_t n; 107 108 for (n = 0; n < wCnt; n++) 109 dst[n] = le64dec(src + n * 8); 110} 111#else 112; /* output only the function prototype */ 113#endif 114#endif /* ifndef Skein_Get64_LSB_First */ 115 116/* Start FreeBSD libmd shims */ 117 118/* Ensure libmd symbols do not clash with libcrypto */ 119#ifndef SKEIN256_Init 120#define SKEIN256_Init _libmd_SKEIN256_Init 121#define SKEIN512_Init _libmd_SKEIN512_Init 122#define SKEIN1024_Init _libmd_SKEIN1024_Init 123#endif 124#ifndef SKEIN256_Update 125#define SKEIN256_Update _libmd_SKEIN256_Update 126#define SKEIN512_Update _libmd_SKEIN512_Update 127#define SKEIN1024_Update _libmd_SKEIN1024_Update 128#endif 129#ifndef SKEIN256_Final 130#define SKEIN256_Final _libmd_SKEIN256_Final 131#define SKEIN512_Final _libmd_SKEIN512_Final 132#define SKEIN1024_Final _libmd_SKEIN1024_Final 133#endif 134#ifndef SKEIN256_End 135#define SKEIN256_End _libmd_SKEIN256_End 136#define SKEIN512_End _libmd_SKEIN512_End 137#define SKEIN1024_End _libmd_SKEIN1024_End 138#endif 139#ifndef SKEIN256_Fd 140#define SKEIN256_Fd _libmd_SKEIN256_Fd 141#define SKEIN512_Fd _libmd_SKEIN512_Fd 142#define SKEIN1024_Fd _libmd_SKEIN1024_Fd 143#endif 144#ifndef SKEIN256_FdChunk 145#define SKEIN256_FdChunk _libmd_SKEIN256_FdChunk 146#define SKEIN512_FdChunk _libmd_SKEIN512_FdChunk 147#define SKEIN1024_FdChunk _libmd_SKEIN1024_FdChunk 148#endif 149#ifndef SKEIN256_File 150#define SKEIN256_File _libmd_SKEIN256_File 151#define SKEIN512_File _libmd_SKEIN512_File 152#define SKEIN1024_File _libmd_SKEIN1024_File 153#endif 154#ifndef SKEIN256_FileChunk 155#define SKEIN256_FileChunk _libmd_SKEIN256_FileChunk 156#define SKEIN512_FileChunk _libmd_SKEIN512_FileChunk 157#define SKEIN1024_FileChunk _libmd_SKEIN1024_FileChunk 158#endif 159#ifndef SKEIN256_Data 160#define SKEIN256_Data _libmd_SKEIN256_Data 161#define SKEIN512_Data _libmd_SKEIN512_Data 162#define SKEIN1024_Data _libmd_SKEIN1024_Data 163#endif 164 165__END_DECLS 166 167#endif /* ifndef _SKEIN_PORT_H_ */ 168