cHashSHA256.cpp File Reference

#include "pch.h"
#include "Hash/cHashSHA256.h"

Namespaces
	GrayLib

Macros
#define	S2(x)   (cBits::Rotr<UINT32>(x, 2) ^ cBits::Rotr<UINT32>(x,13) ^ cBits::Rotr<UINT32>(x,22))
#define	S3(x)   (cBits::Rotr<UINT32>(x, 6) ^ cBits::Rotr<UINT32>(x,11) ^ cBits::Rotr<UINT32>(x,25))
#define	F0(x, y, z)   ((x & y) | (z & (x | y)))
#define	F1(x, y, z)   (z ^ (x & (y ^ z)))
#define	P(a, b, c, d, e, f, g, h, x, K)
#define	SHR(x, n)   ((x) >> n)
#define	S0(x)   (cBits::Rotr<UINT32>(x, 7) ^ cBits::Rotr<UINT32>(x,18) ^ SHR(x, 3))
#define	S1(x)   (cBits::Rotr<UINT32>(x,17) ^ cBits::Rotr<UINT32>(x,19) ^ SHR(x,10))
#define	R(t)   ( w[t] = S1(w[t - 2]) + w[t - 7] + S0(w[t - 15]) + w[t - 16] )

Detailed Description

FIPS-180-2 compliant SHA-256 implementation The SHA-256 Secure Hash Standard was published by NIST in 2002. http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf

Copyright

1992 - 2020 Dennis Robinson (http://www.menasoft.com)

Macro Definition Documentation

F0

#define F0	(		x,
			y,
			z
	)		((x & y) | (z & (x | y)))

F1

#define F1	(		x,
			y,
			z
	)		(z ^ (x & (y ^ z)))

P

#define P	(		a,
			b,
			c,
			d,
			e,
			f,
			g,
			h,
			x,
			K
	)

Value:

        { temp1 = h + S3(e) + F1(e,f,g) + K + x; temp2 = S2(a) + F0(a,b,c);  \
        d += temp1; h = temp1 + temp2; }

R

#define R

(

t

)

( w[t] = S1(w[t - 2]) + w[t - 7] + S0(w[t - 15]) + w[t - 16] )

S0

#define S0

(

x

)

(cBits::Rotr<UINT32>(x, 7) ^ cBits::Rotr<UINT32>(x,18) ^ SHR(x, 3))

S1

#define S1

(

x

)

(cBits::Rotr<UINT32>(x,17) ^ cBits::Rotr<UINT32>(x,19) ^ SHR(x,10))

S2

#define S2

(

x

)

(cBits::Rotr<UINT32>(x, 2) ^ cBits::Rotr<UINT32>(x,13) ^ cBits::Rotr<UINT32>(x,22))

S3

#define S3

(

x

)

(cBits::Rotr<UINT32>(x, 6) ^ cBits::Rotr<UINT32>(x,11) ^ cBits::Rotr<UINT32>(x,25))

SHR

#define SHR	(		x,
			n
	)		((x) >> n)