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sys/crypto/skein/skein_port.h

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** **
** Many thanks to Brian Gladman for his portable header files. ** Many thanks to Brian Gladman for his portable header files.
** **
** To port Skein to an "unsupported" platform, change the definitions ** To port Skein to an "unsupported" platform, change the definitions
** in this file appropriately. ** in this file appropriately.
** **
********************************************************************/ ********************************************************************/
#include "brg_types.h" /* get integer type definitions */ #include <sys/endian.h>
#include <sys/types.h>
typedef unsigned int uint_t; /* native unsigned integer */ typedef unsigned int uint_t; /* native unsigned integer */
typedef uint_8t u08b_t; /* 8-bit unsigned integer */ typedef u_int8_t u08b_t; /* 8-bit unsigned integer */
typedef uint_64t u64b_t; /* 64-bit unsigned integer */ typedef u_int32_t uint_32t; /* 32-bit unsigned integer */
typedef u_int64_t u64b_t; /* 64-bit unsigned integer */
#ifndef RotL_64 #ifndef RotL_64
#define RotL_64(x,N) (((x) << (N)) | ((x) >> (64-(N)))) #define RotL_64(x,N) (((x) << (N)) | ((x) >> (64-(N))))
#endif #endif
__BEGIN_DECLS
/* /*
* Skein is "natively" little-endian (unlike SHA-xxx), for optimal * Skein is "natively" little-endian (unlike SHA-xxx), for optimal
* performance on x86 CPUs. The Skein code requires the following * performance on x86 CPUs. The Skein code requires the following
* definitions for dealing with endianness: * definitions for dealing with endianness:
* *
* SKEIN_NEED_SWAP: 0 for little-endian, 1 for big-endian * SKEIN_NEED_SWAP: 0 for little-endian, 1 for big-endian
* Skein_Put64_LSB_First * Skein_Put64_LSB_First
* Skein_Get64_LSB_First * Skein_Get64_LSB_First
* Skein_Swap64 * Skein_Swap64
* *
* If SKEIN_NEED_SWAP is defined at compile time, it is used here * If SKEIN_NEED_SWAP is defined at compile time, it is used here
* along with the portable versions of Put64/Get64/Swap64, which * along with the portable versions of Put64/Get64/Swap64, which
* are slow in general. * are slow in general.
* *
* Otherwise, an "auto-detect" of endianness is attempted below. * Otherwise, an "auto-detect" of endianness is attempted below.
* If the default handling doesn't work well, the user may insert * If the default handling doesn't work well, the user may insert
* platform-specific code instead (e.g., for big-endian CPUs). * platform-specific code instead (e.g., for big-endian CPUs).
* *
*/ */
#ifndef SKEIN_NEED_SWAP /* compile-time "override" for endianness? */ #ifndef SKEIN_NEED_SWAP /* compile-time "override" for endianness? */
#include "brg_endian.h" /* get endianness selection */ #if BYTE_ORDER == BIG_ENDIAN
#if PLATFORM_BYTE_ORDER == IS_BIG_ENDIAN
/* here for big-endian CPUs */ /* here for big-endian CPUs */
#define SKEIN_NEED_SWAP (1) #define SKEIN_NEED_SWAP (1)
#elif PLATFORM_BYTE_ORDER == IS_LITTLE_ENDIAN #ifdef SKEIN_PORT_CODE
void Skein_Put64_LSB_First(u08b_t *dst,const u64b_t *src,size_t bCnt);
void Skein_Get64_LSB_First(u64b_t *dst,const u08b_t *src,size_t wCnt);
#endif /* ifdef SKEIN_PORT_CODE */
#elif BYTE_ORDER == LITTLE_ENDIAN
/* here for x86 and x86-64 CPUs (and other detected little-endian CPUs) */ /* here for x86 and x86-64 CPUs (and other detected little-endian CPUs) */
#define SKEIN_NEED_SWAP (0) #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_Put64_LSB_First(dst08,src64,bCnt) memcpy(dst08,src64,bCnt)
#define Skein_Get64_LSB_First(dst64,src08,wCnt) memcpy(dst64,src08,8*(wCnt)) #define Skein_Get64_LSB_First(dst64,src08,wCnt) memcpy(dst64,src08,8*(wCnt))
#endif
#else #else
#error "Skein needs endianness setting!" #error "Skein needs endianness setting!"
#endif #endif
#endif /* ifndef SKEIN_NEED_SWAP */ #endif /* ifndef SKEIN_NEED_SWAP */
/* /*
****************************************************************** ******************************************************************
* Provide any definitions still needed. * Provide any definitions still needed.
****************************************************************** ******************************************************************
*/ */
#ifndef Skein_Swap64 /* swap for big-endian, nop for little-endian */ #ifndef Skein_Swap64 /* swap for big-endian, nop for little-endian */
#if SKEIN_NEED_SWAP #if SKEIN_NEED_SWAP
#define Skein_Swap64(w64) \ #define Skein_Swap64(w64) bswap64(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 #else
#define Skein_Swap64(w64) (w64) #define Skein_Swap64(w64) (w64)
#endif #endif
#endif /* ifndef Skein_Swap64 */ #endif /* ifndef Skein_Swap64 */
#ifndef Skein_Put64_LSB_First #ifndef Skein_Put64_LSB_First
void Skein_Put64_LSB_First(u08b_t *dst,const u64b_t *src,size_t bCnt) void Skein_Put64_LSB_First(u08b_t *dst,const u64b_t *src,size_t bCnt)
#ifdef SKEIN_PORT_CODE /* instantiate the function code here? */ #ifdef SKEIN_PORT_CODE /* instantiate the function code here? */
{ /* this version is fully portable (big-endian or little-endian), but slow */ {
size_t n; size_t n;
for (n=0;n<bCnt;n++) for (n = 0; n < bCnt / 8; n++)
dst[n] = (u08b_t) (src[n>>3] >> (8*(n&7))); le64enc(dst + n * 8, src[n]);
} }
#else #else
; /* output only the function prototype */ ; /* output only the function prototype */
#endif #endif
#endif /* ifndef Skein_Put64_LSB_First */ #endif /* ifndef Skein_Put64_LSB_First */
#ifndef Skein_Get64_LSB_First #ifndef Skein_Get64_LSB_First
void Skein_Get64_LSB_First(u64b_t *dst,const u08b_t *src,size_t wCnt) void Skein_Get64_LSB_First(u64b_t *dst,const u08b_t *src,size_t wCnt)
#ifdef SKEIN_PORT_CODE /* instantiate the function code here? */ #ifdef SKEIN_PORT_CODE /* instantiate the function code here? */
{ /* this version is fully portable (big-endian or little-endian), but slow */ {
size_t n; size_t n;
for (n=0;n<8*wCnt;n+=8) for (n = 0; n < wCnt; n++)
dst[n/8] = (((u64b_t) src[n ]) ) + dst[n] = le64dec(src + n * 8);
(((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 #else
; /* output only the function prototype */ ; /* output only the function prototype */
#endif #endif
#endif /* ifndef Skein_Get64_LSB_First */ #endif /* ifndef Skein_Get64_LSB_First */
/* Start FreeBSD libmd shims */
/* Ensure libmd symbols do not clash with libcrypto */
#ifndef SKEIN256_Init
#define SKEIN256_Init _libmd_SKEIN256_Init
#define SKEIN512_Init _libmd_SKEIN512_Init
#define SKEIN1024_Init _libmd_SKEIN1024_Init
#endif
#ifndef SKEIN256_Update
#define SKEIN256_Update _libmd_SKEIN256_Update
#define SKEIN512_Update _libmd_SKEIN512_Update
#define SKEIN1024_Update _libmd_SKEIN1024_Update
#endif
#ifndef SKEIN256_Final
#define SKEIN256_Final _libmd_SKEIN256_Final
#define SKEIN512_Final _libmd_SKEIN512_Final
#define SKEIN1024_Final _libmd_SKEIN1024_Final
#endif
#ifndef SKEIN256_End
#define SKEIN256_End _libmd_SKEIN256_End
#define SKEIN512_End _libmd_SKEIN512_End
#define SKEIN1024_End _libmd_SKEIN1024_End
#endif
#ifndef SKEIN256_File
#define SKEIN256_File _libmd_SKEIN256_File
#define SKEIN512_File _libmd_SKEIN512_File
#define SKEIN1024_File _libmd_SKEIN1024_File
#endif
#ifndef SKEIN256_FileChunk
#define SKEIN256_FileChunk _libmd_SKEIN256_FileChunk
#define SKEIN512_FileChunk _libmd_SKEIN512_FileChunk
#define SKEIN1024_FileChunk _libmd_SKEIN1024_FileChunk
#endif
#ifndef SKEIN256_Data
#define SKEIN256_Data _libmd_SKEIN256_Data
#define SKEIN512_Data _libmd_SKEIN512_Data
#define SKEIN1024_Data _libmd_SKEIN1024_Data
#endif
__END_DECLS
#endif /* ifndef _SKEIN_PORT_H_ */ #endif /* ifndef _SKEIN_PORT_H_ */