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 */ 22 typedef unsigned int uint_t; /* native unsigned integer */ 23 #endif 24 typedef uint8_t u08b_t; /* 8-bit unsigned integer */ 25 typedef uint32_t uint_32t; /* 32-bit unsigned integer */ 26 typedef 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 59 void Skein_Put64_LSB_First(u08b_t *dst,const u64b_t *src,size_t bCnt); 60 void 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 88 void 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 103 void 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