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isa-l_crypto/mh_sha1/mh_sha1_ref.c  view on Meta::CPAN

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#include <string.h>
#include "mh_sha1_internal.h"

////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
 //  Macros and sub-functions which already exist in source code file
 //  (sha1_for_mh_sha1.c) is part of ISA-L library as internal functions.
 //  The reason why writing them twice is the linking issue caused by
 //  mh_sha1_ref(). mh_sha1_ref() needs these macros and sub-functions
 //  without linking ISA-L library. So mh_sha1_ref() includes them in
 //  order to contain essential sub-functions in its own object file.
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////

#define W(x) w[(x) & 15]

#define step00_19(i,a,b,c,d,e) \
	if (i>15) W(i) = rol32(W(i-3)^W(i-8)^W(i-14)^W(i-16), 1); \
	else W(i) = bswap(ww[i]); \
	e += rol32(a,5) + F1(b,c,d) + 0x5A827999 + W(i); \
	b = rol32(b,30)

#define step20_39(i,a,b,c,d,e) \
	W(i) = rol32(W(i-3)^W(i-8)^W(i-14)^W(i-16), 1); \
	e += rol32(a,5) + F2(b,c,d) + 0x6ED9EBA1 + W(i); \
	b = rol32(b,30)

#define step40_59(i,a,b,c,d,e) \
	W(i) = rol32(W(i-3)^W(i-8)^W(i-14)^W(i-16), 1); \
	e += rol32(a,5) + F3(b,c,d) + 0x8F1BBCDC + W(i); \
	b = rol32(b,30)

#define step60_79(i,a,b,c,d,e) \
	W(i) = rol32(W(i-3)^W(i-8)^W(i-14)^W(i-16), 1); \
	e += rol32(a,5) + F4(b,c,d) + 0xCA62C1D6 + W(i); \
	b = rol32(b,30)

void sha1_single_for_mh_sha1_ref(const uint8_t * data, uint32_t digest[])
{
	uint32_t a, b, c, d, e;
	uint32_t w[16] = { 0 };
	uint32_t *ww = (uint32_t *) data;

	a = digest[0];
	b = digest[1];
	c = digest[2];
	d = digest[3];
	e = digest[4];

	step00_19(0, a, b, c, d, e);
	step00_19(1, e, a, b, c, d);
	step00_19(2, d, e, a, b, c);
	step00_19(3, c, d, e, a, b);
	step00_19(4, b, c, d, e, a);
	step00_19(5, a, b, c, d, e);
	step00_19(6, e, a, b, c, d);
	step00_19(7, d, e, a, b, c);
	step00_19(8, c, d, e, a, b);
	step00_19(9, b, c, d, e, a);
	step00_19(10, a, b, c, d, e);
	step00_19(11, e, a, b, c, d);
	step00_19(12, d, e, a, b, c);
	step00_19(13, c, d, e, a, b);
	step00_19(14, b, c, d, e, a);
	step00_19(15, a, b, c, d, e);
	step00_19(16, e, a, b, c, d);