Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/crypto/skein/skein_port.h
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1 /* $FreeBSD$ */ 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 _SPL_SYS_TYPES_H_ /* Avoid redefining this typedef */ 23 typedef unsigned int uint_t; /* native unsigned integer */ 24 #endif 25 typedef uint8_t u08b_t; /* 8-bit unsigned integer */ 26 typedef uint32_t uint_32t; /* 32-bit unsigned integer */ 27 typedef uint64_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 60 void Skein_Put64_LSB_First(u08b_t *dst,const u64b_t *src,size_t bCnt); 61 void 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 89 void 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 104 void 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_ */
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