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Commit 90b06ac7 authored by Doug Zongker's avatar Doug Zongker
Browse files

only use faster SHA-1 code on machines with good libc 

Macs don't have byteswap.h or endian.h.  Change conditionals to only
use the faster SHA-1 code on little-endian machines with byteswap.h.
parent a2f441b8

include/mincrypt/sha.h

+1 −2
Original line number Original line Diff line number Diff line
@@ -29,7 +29,6 @@ 
#define _EMBEDDED_SHA_H_

#define _EMBEDDED_SHA_H_





#include <inttypes.h>

#include <inttypes.h>

#include <endian.h>





#ifdef __cplusplus

#ifdef __cplusplus

extern "C" {

extern "C" {
@@ -38,7 +37,7 @@ extern "C" { 
typedef struct SHA_CTX {

typedef struct SHA_CTX {

    uint64_t count;

    uint64_t count;

    uint32_t state[5];

    uint32_t state[5];

#if __BYTE_ORDER == __LITTLE_ENDIAN

#if defined(HAVE_ENDIAN_H) && defined(HAVE_LITTLE_ENDIAN)

    union {

    union {

        uint8_t b[64];

        uint8_t b[64];

        uint32_t w[16];

        uint32_t w[16];

libmincrypt/sha.c

+8 −6
Original line number Original line Diff line number Diff line
@@ -25,13 +25,15 @@ 
** ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

** ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

*/

*/





#include <byteswap.h>

#include <endian.h>

#include <memory.h>



#include "mincrypt/sha.h"

#include "mincrypt/sha.h"





#if __BYTE_ORDER == __LITTLE_ENDIAN

// Some machines lack byteswap.h and endian.h.  These have to use the

// slower code, even if they're little-endian.



#if defined(HAVE_ENDIAN_H) && defined(HAVE_LITTLE_ENDIAN)



#include <byteswap.h>

#include <memory.h>





// This version is about 28% faster than the generic version below,

// This version is about 28% faster than the generic version below,

// but assumes little-endianness.

// but assumes little-endianness.
@@ -186,7 +188,7 @@ const uint8_t* SHA_final(SHA_CTX* ctx) { 
    return ctx->buf.b;

    return ctx->buf.b;

}

}





#else   // __BYTE_ORDER == BIG_ENDIAN

#else   // #if defined(HAVE_ENDIAN_H) && defined(HAVE_LITTLE_ENDIAN)





#define rol(bits, value) (((value) << (bits)) | ((value) >> (32 - (bits))))

#define rol(bits, value) (((value) << (bits)) | ((value) >> (32 - (bits))))