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sys/crypto/skein/skein_port.h
- This file was added.
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#ifndef _SKEIN_PORT_H_ | |||||
#define _SKEIN_PORT_H_ | |||||
/******************************************************************* | |||||
** | |||||
** Platform-specific definitions for Skein hash function. | |||||
** | |||||
** Source code author: Doug Whiting, 2008. | |||||
** | |||||
** This algorithm and source code is released to the public domain. | |||||
** | |||||
** Many thanks to Brian Gladman for his portable header files. | |||||
** | |||||
** To port Skein to an "unsupported" platform, change the definitions | |||||
** in this file appropriately. | |||||
** | |||||
********************************************************************/ | |||||
#ifndef _KERNEL | |||||
#include <sys/types.h> | |||||
#endif | |||||
#include "brg_types.h" /* get integer type definitions */ | |||||
typedef unsigned int uint_t; /* native unsigned integer */ | |||||
typedef uint_8t u08b_t; /* 8-bit unsigned integer */ | |||||
typedef uint_64t 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? */ | |||||
#include "brg_endian.h" /* get endianness selection */ | |||||
#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<bCnt;n++) | |||||
dst[n] = (u08b_t) (src[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 */ | |||||
/* Start FreeBSD libmd shims */ | |||||
/* Ensure libmd symbols do not clash with libcrypto */ | |||||
#ifndef Skein_256_Init | |||||
#define Skein_256_Init _libmd_SKEIN256_Init | |||||
#define Skein_512_Init _libmd_SKEIN512_Init | |||||
#define Skein_1024_Init _libmd_SKEIN1024_Init | |||||
#endif | |||||
#ifndef Skein_256_Update | |||||
#define Skein_256_Update _libmd_SKEIN256_Update | |||||
#define Skein_512_Update _libmd_SKEIN512_Update | |||||
#define Skein_1024_Update _libmd_SKEIN1024_Update | |||||
#endif | |||||
#ifndef Skein_256_Final | |||||
#define Skein_256_Final _libmd_SKEIN256_Final | |||||
#define Skein_512_Final _libmd_SKEIN512_Final | |||||
#define Skein1024_Final _libmd_SKEIN1024_Final | |||||
#endif | |||||
#ifndef Skein_256_End | |||||
#define Skein_256_End _libmd_SKEIN256_End | |||||
#define Skein_512_End _libmd_SKEIN512_End | |||||
#define Skein_1024_End _libmd_SKEIN1024_End | |||||
#endif | |||||
#ifndef Skein_256_File | |||||
#define Skein_256_File _libmd_SKEIN256_File | |||||
#define Skein_512_File _libmd_SKEIN512_File | |||||
#define Skein_1024_File _libmd_SKEIN1024_File | |||||
#endif | |||||
#ifndef Skein_256_FileChunk | |||||
#define Skein_256_FileChunk _libmd_SKEIN256_FileChunk | |||||
#define Skein_512_FileChunk _libmd_SKEIN512_FileChunk | |||||
#define Skein_1024_FileChunk _libmd_SKEIN1024_FileChunk | |||||
#endif | |||||
#ifndef Skein_256_Data | |||||
#define Skein_256_Data _libmd_SKEIN256_Data | |||||
#define Skein_512_Data _libmd_SKEIN512_Data | |||||
#define Skein_1024_Data _libmd_SKEIN1024_Data | |||||
#endif | |||||
#endif /* ifndef _SKEIN_PORT_H_ */ |