de13c2427d
Reviewed by: allanjude, cem MFC after: 2 months Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D8264
169 lines
5.2 KiB
C
169 lines
5.2 KiB
C
/* $FreeBSD$ */
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#ifndef _SKEIN_PORT_H_
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#define _SKEIN_PORT_H_
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/*******************************************************************
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**
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** Platform-specific definitions for Skein hash function.
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**
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** Source code author: Doug Whiting, 2008.
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**
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** This algorithm and source code is released to the public domain.
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**
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** Many thanks to Brian Gladman for his portable header files.
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**
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** To port Skein to an "unsupported" platform, change the definitions
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** in this file appropriately.
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**
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********************************************************************/
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#include <sys/endian.h>
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#include <sys/types.h>
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#ifndef _OPENSOLARIS_SYS_TYPES_H_ /* Avoid redefining this typedef */
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typedef unsigned int uint_t; /* native unsigned integer */
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#endif
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typedef u_int8_t u08b_t; /* 8-bit unsigned integer */
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typedef u_int32_t uint_32t; /* 32-bit unsigned integer */
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typedef u_int64_t u64b_t; /* 64-bit unsigned integer */
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#ifndef RotL_64
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#define RotL_64(x,N) (((x) << (N)) | ((x) >> (64-(N))))
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#endif
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__BEGIN_DECLS
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/*
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* Skein is "natively" little-endian (unlike SHA-xxx), for optimal
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* performance on x86 CPUs. The Skein code requires the following
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* definitions for dealing with endianness:
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*
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* SKEIN_NEED_SWAP: 0 for little-endian, 1 for big-endian
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* Skein_Put64_LSB_First
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* Skein_Get64_LSB_First
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* Skein_Swap64
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*
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* If SKEIN_NEED_SWAP is defined at compile time, it is used here
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* along with the portable versions of Put64/Get64/Swap64, which
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* are slow in general.
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*
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* Otherwise, an "auto-detect" of endianness is attempted below.
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* If the default handling doesn't work well, the user may insert
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* platform-specific code instead (e.g., for big-endian CPUs).
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*
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*/
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#ifndef SKEIN_NEED_SWAP /* compile-time "override" for endianness? */
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#if BYTE_ORDER == BIG_ENDIAN
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/* here for big-endian CPUs */
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#define SKEIN_NEED_SWAP (1)
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#ifdef SKEIN_PORT_CODE
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void Skein_Put64_LSB_First(u08b_t *dst,const u64b_t *src,size_t bCnt);
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void Skein_Get64_LSB_First(u64b_t *dst,const u08b_t *src,size_t wCnt);
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#endif /* ifdef SKEIN_PORT_CODE */
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#elif BYTE_ORDER == LITTLE_ENDIAN
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/* here for x86 and x86-64 CPUs (and other detected little-endian CPUs) */
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#define SKEIN_NEED_SWAP (0)
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#define Skein_Put64_LSB_First(dst08,src64,bCnt) memcpy(dst08,src64,bCnt)
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#define Skein_Get64_LSB_First(dst64,src08,wCnt) memcpy(dst64,src08,8*(wCnt))
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#else
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#error "Skein needs endianness setting!"
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#endif
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#endif /* ifndef SKEIN_NEED_SWAP */
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/*
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******************************************************************
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* Provide any definitions still needed.
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******************************************************************
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*/
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#ifndef Skein_Swap64 /* swap for big-endian, nop for little-endian */
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#if SKEIN_NEED_SWAP
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#define Skein_Swap64(w64) bswap64(w64)
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#else
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#define Skein_Swap64(w64) (w64)
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#endif
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#endif /* ifndef Skein_Swap64 */
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#ifndef Skein_Put64_LSB_First
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void Skein_Put64_LSB_First(u08b_t *dst,const u64b_t *src,size_t bCnt)
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#ifdef SKEIN_PORT_CODE /* instantiate the function code here? */
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{
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size_t n;
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for (n = 0; n < bCnt / 8; n++)
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le64enc(dst + n * 8, src[n]);
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}
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#else
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; /* output only the function prototype */
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#endif
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#endif /* ifndef Skein_Put64_LSB_First */
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#ifndef Skein_Get64_LSB_First
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void Skein_Get64_LSB_First(u64b_t *dst,const u08b_t *src,size_t wCnt)
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#ifdef SKEIN_PORT_CODE /* instantiate the function code here? */
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{
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size_t n;
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for (n = 0; n < wCnt; n++)
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dst[n] = le64dec(src + n * 8);
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}
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#else
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; /* output only the function prototype */
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#endif
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#endif /* ifndef Skein_Get64_LSB_First */
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/* Start FreeBSD libmd shims */
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/* Ensure libmd symbols do not clash with libcrypto */
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#ifndef SKEIN256_Init
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#define SKEIN256_Init _libmd_SKEIN256_Init
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#define SKEIN512_Init _libmd_SKEIN512_Init
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#define SKEIN1024_Init _libmd_SKEIN1024_Init
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#endif
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#ifndef SKEIN256_Update
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#define SKEIN256_Update _libmd_SKEIN256_Update
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#define SKEIN512_Update _libmd_SKEIN512_Update
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#define SKEIN1024_Update _libmd_SKEIN1024_Update
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#endif
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#ifndef SKEIN256_Final
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#define SKEIN256_Final _libmd_SKEIN256_Final
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#define SKEIN512_Final _libmd_SKEIN512_Final
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#define SKEIN1024_Final _libmd_SKEIN1024_Final
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#endif
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#ifndef SKEIN256_End
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#define SKEIN256_End _libmd_SKEIN256_End
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#define SKEIN512_End _libmd_SKEIN512_End
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#define SKEIN1024_End _libmd_SKEIN1024_End
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#endif
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#ifndef SKEIN256_Fd
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#define SKEIN256_Fd _libmd_SKEIN256_Fd
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#define SKEIN512_Fd _libmd_SKEIN512_Fd
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#define SKEIN1024_Fd _libmd_SKEIN1024_Fd
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#endif
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#ifndef SKEIN256_FdChunk
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#define SKEIN256_FdChunk _libmd_SKEIN256_FdChunk
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#define SKEIN512_FdChunk _libmd_SKEIN512_FdChunk
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#define SKEIN1024_FdChunk _libmd_SKEIN1024_FdChunk
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#endif
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#ifndef SKEIN256_File
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#define SKEIN256_File _libmd_SKEIN256_File
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#define SKEIN512_File _libmd_SKEIN512_File
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#define SKEIN1024_File _libmd_SKEIN1024_File
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#endif
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#ifndef SKEIN256_FileChunk
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#define SKEIN256_FileChunk _libmd_SKEIN256_FileChunk
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#define SKEIN512_FileChunk _libmd_SKEIN512_FileChunk
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#define SKEIN1024_FileChunk _libmd_SKEIN1024_FileChunk
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#endif
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#ifndef SKEIN256_Data
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#define SKEIN256_Data _libmd_SKEIN256_Data
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#define SKEIN512_Data _libmd_SKEIN512_Data
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#define SKEIN1024_Data _libmd_SKEIN1024_Data
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#endif
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__END_DECLS
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#endif /* ifndef _SKEIN_PORT_H_ */
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