skein_port.h revision 310372
1/* $FreeBSD: stable/11/sys/crypto/skein/skein_port.h 310372 2016-12-21 18:42:04Z emaste $ */ 2#ifndef _SKEIN_PORT_H_ 3#define _SKEIN_PORT_H_ 4/******************************************************************* 5** 6** Platform-specific definitions for Skein hash function. 7** 8** Source code author: Doug Whiting, 2008. 9** 10** This algorithm and source code is released to the public domain. 11** 12** Many thanks to Brian Gladman for his portable header files. 13** 14** To port Skein to an "unsupported" platform, change the definitions 15** in this file appropriately. 16** 17********************************************************************/ 18 19#include <sys/endian.h> 20#include <sys/types.h> 21 22#ifndef _OPENSOLARIS_SYS_TYPES_H_ /* Avoid redefining this typedef */ 23typedef unsigned int uint_t; /* native unsigned integer */ 24#endif 25typedef u_int8_t u08b_t; /* 8-bit unsigned integer */ 26typedef u_int32_t uint_32t; /* 32-bit unsigned integer */ 27typedef u_int64_t u64b_t; /* 64-bit unsigned integer */ 28 29#ifndef RotL_64 30#define RotL_64(x,N) (((x) << (N)) | ((x) >> (64-(N)))) 31#endif 32 33__BEGIN_DECLS 34 35/* 36 * Skein is "natively" little-endian (unlike SHA-xxx), for optimal 37 * performance on x86 CPUs. The Skein code requires the following 38 * definitions for dealing with endianness: 39 * 40 * SKEIN_NEED_SWAP: 0 for little-endian, 1 for big-endian 41 * Skein_Put64_LSB_First 42 * Skein_Get64_LSB_First 43 * Skein_Swap64 44 * 45 * If SKEIN_NEED_SWAP is defined at compile time, it is used here 46 * along with the portable versions of Put64/Get64/Swap64, which 47 * are slow in general. 48 * 49 * Otherwise, an "auto-detect" of endianness is attempted below. 50 * If the default handling doesn't work well, the user may insert 51 * platform-specific code instead (e.g., for big-endian CPUs). 52 * 53 */ 54#ifndef SKEIN_NEED_SWAP /* compile-time "override" for endianness? */ 55 56#if BYTE_ORDER == BIG_ENDIAN 57 /* here for big-endian CPUs */ 58#define SKEIN_NEED_SWAP (1) 59#ifdef SKEIN_PORT_CODE 60void Skein_Put64_LSB_First(u08b_t *dst,const u64b_t *src,size_t bCnt); 61void Skein_Get64_LSB_First(u64b_t *dst,const u08b_t *src,size_t wCnt); 62#endif /* ifdef SKEIN_PORT_CODE */ 63#elif BYTE_ORDER == LITTLE_ENDIAN 64 /* here for x86 and x86-64 CPUs (and other detected little-endian CPUs) */ 65#define SKEIN_NEED_SWAP (0) 66#define Skein_Put64_LSB_First(dst08,src64,bCnt) memcpy(dst08,src64,bCnt) 67#define Skein_Get64_LSB_First(dst64,src08,wCnt) memcpy(dst64,src08,8*(wCnt)) 68#else 69#error "Skein needs endianness setting!" 70#endif 71 72#endif /* ifndef SKEIN_NEED_SWAP */ 73 74/* 75 ****************************************************************** 76 * Provide any definitions still needed. 77 ****************************************************************** 78 */ 79#ifndef Skein_Swap64 /* swap for big-endian, nop for little-endian */ 80#if SKEIN_NEED_SWAP 81#define Skein_Swap64(w64) bswap64(w64) 82#else 83#define Skein_Swap64(w64) (w64) 84#endif 85#endif /* ifndef Skein_Swap64 */ 86 87 88#ifndef Skein_Put64_LSB_First 89void Skein_Put64_LSB_First(u08b_t *dst,const u64b_t *src,size_t bCnt) 90#ifdef SKEIN_PORT_CODE /* instantiate the function code here? */ 91{ 92 size_t n; 93 94 for (n = 0; n < bCnt / 8; n++) 95 le64enc(dst + n * 8, src[n]); 96} 97#else 98; /* output only the function prototype */ 99#endif 100#endif /* ifndef Skein_Put64_LSB_First */ 101 102 103#ifndef Skein_Get64_LSB_First 104void Skein_Get64_LSB_First(u64b_t *dst,const u08b_t *src,size_t wCnt) 105#ifdef SKEIN_PORT_CODE /* instantiate the function code here? */ 106{ 107 size_t n; 108 109 for (n = 0; n < wCnt; n++) 110 dst[n] = le64dec(src + n * 8); 111} 112#else 113; /* output only the function prototype */ 114#endif 115#endif /* ifndef Skein_Get64_LSB_First */ 116 117/* Start FreeBSD libmd shims */ 118 119/* Ensure libmd symbols do not clash with libcrypto */ 120#ifndef SKEIN256_Init 121#define SKEIN256_Init _libmd_SKEIN256_Init 122#define SKEIN512_Init _libmd_SKEIN512_Init 123#define SKEIN1024_Init _libmd_SKEIN1024_Init 124#endif 125#ifndef SKEIN256_Update 126#define SKEIN256_Update _libmd_SKEIN256_Update 127#define SKEIN512_Update _libmd_SKEIN512_Update 128#define SKEIN1024_Update _libmd_SKEIN1024_Update 129#endif 130#ifndef SKEIN256_Final 131#define SKEIN256_Final _libmd_SKEIN256_Final 132#define SKEIN512_Final _libmd_SKEIN512_Final 133#define SKEIN1024_Final _libmd_SKEIN1024_Final 134#endif 135#ifndef SKEIN256_End 136#define SKEIN256_End _libmd_SKEIN256_End 137#define SKEIN512_End _libmd_SKEIN512_End 138#define SKEIN1024_End _libmd_SKEIN1024_End 139#endif 140#ifndef SKEIN256_Fd 141#define SKEIN256_Fd _libmd_SKEIN256_Fd 142#define SKEIN512_Fd _libmd_SKEIN512_Fd 143#define SKEIN1024_Fd _libmd_SKEIN1024_Fd 144#endif 145#ifndef SKEIN256_FdChunk 146#define SKEIN256_FdChunk _libmd_SKEIN256_FdChunk 147#define SKEIN512_FdChunk _libmd_SKEIN512_FdChunk 148#define SKEIN1024_FdChunk _libmd_SKEIN1024_FdChunk 149#endif 150#ifndef SKEIN256_File 151#define SKEIN256_File _libmd_SKEIN256_File 152#define SKEIN512_File _libmd_SKEIN512_File 153#define SKEIN1024_File _libmd_SKEIN1024_File 154#endif 155#ifndef SKEIN256_FileChunk 156#define SKEIN256_FileChunk _libmd_SKEIN256_FileChunk 157#define SKEIN512_FileChunk _libmd_SKEIN512_FileChunk 158#define SKEIN1024_FileChunk _libmd_SKEIN1024_FileChunk 159#endif 160#ifndef SKEIN256_Data 161#define SKEIN256_Data _libmd_SKEIN256_Data 162#define SKEIN512_Data _libmd_SKEIN512_Data 163#define SKEIN1024_Data _libmd_SKEIN1024_Data 164#endif 165 166__END_DECLS 167 168#endif /* ifndef _SKEIN_PORT_H_ */ 169