SHA256.cpp File Reference

#include <cstring>
#include <cassert>
#include "SHA256.h"

Include dependency graph for SHA256.cpp:

Go to the source code of this file.

Macros
#define	Ch(x, y, z)   (z ^ (x & (y ^ z)))
#define	Gamma0(x)   (S(x, 7) ^ S(x, 18) ^ R(x, 3))
#define	Gamma1(x)   (S(x, 17) ^ S(x, 19) ^ R(x, 10))
#define	LOAD32H(x, y)
#define	Maj(x, y, z)   (((x | y) & z) | (x & y))
#define	MIN(x, y)   ( ((x)<(y))?(x):(y) )
#define	R(x, n)   (((x)&0xFFFFFFFFUL)>>(n))
#define	RND(a, b, c, d, e, f, g, h, i, ki)
#define	RORc(x, y)   ( ((((ulong32)(x)&0xFFFFFFFFUL)>>(ulong32)((y)&31)) | ((ulong32)(x)<<(ulong32)(32-((y)&31)))) & 0xFFFFFFFFUL)
#define	S(x, n)   RORc((x),(n))
#define	Sigma0(x)   (S(x, 2) ^ S(x, 13) ^ S(x, 22))
#define	Sigma1(x)   (S(x, 6) ^ S(x, 11) ^ S(x, 25))
#define	STORE32H(x, y)
#define	STORE64H(x, y)
#define	XMEMCMP   memcmp
#define	XMEMCPY   memcpy

Functions
static int	sha256_compress (hash_state *md, const unsigned char *buf)
int	sha256_done (hash_state *md, unsigned char *out)
int	sha256_init (hash_state *md)
int	sha256_process (hash_state *md, const ulong8 *in, ulong32 inlen)

Macro Definition Documentation

Ch

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

Definition at line 47 of file SHA256.cpp.

Gamma0

#define Gamma0

(

x

)

(S(x, 7) ^ S(x, 18) ^ R(x, 3))

Definition at line 53 of file SHA256.cpp.

Gamma1

#define Gamma1

(

x

)

(S(x, 17) ^ S(x, 19) ^ R(x, 10))

Definition at line 54 of file SHA256.cpp.

LOAD32H

#define LOAD32H	(		x,
			y
	)

Value:

  { x = ((ulong32)((y)[0] & 255)<<24) | \
        ((ulong32)((y)[1] & 255)<<16) | \
        ((ulong32)((y)[2] & 255)<<8)  | \
        ((ulong32)((y)[3] & 255)); }

Definition at line 19 of file SHA256.cpp.

Maj

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

Definition at line 48 of file SHA256.cpp.

MIN

#define MIN	(		x,
			y
	)		( ((x)<(y))?(x):(y) )

Definition at line 40 of file SHA256.cpp.

R

#define R	(		x,
			n
	)		(((x)&0xFFFFFFFFUL)>>(n))

Definition at line 50 of file SHA256.cpp.

RND

#define RND	(		a,
			b,
			c,
			d,
			e,
			f,
			g,
			h,
			i,
			ki
	)

Value:

     t0 = h + Sigma1(e) + Ch(e, f, g) + ki + W[i];   \
     t1 = Sigma0(a) + Maj(a, b, c);                  \
     d += t0;                                        \
     h  = t0 + t1;

RORc

#define RORc	(		x,
			y
	)		( ((((ulong32)(x)&0xFFFFFFFFUL)>>(ulong32)((y)&31)) | ((ulong32)(x)<<(ulong32)(32-((y)&31)))) & 0xFFFFFFFFUL)

Definition at line 44 of file SHA256.cpp.

S

#define S	(		x,
			n
	)		RORc((x),(n))

Definition at line 49 of file SHA256.cpp.

Sigma0

#define Sigma0

(

x

)

(S(x, 2) ^ S(x, 13) ^ S(x, 22))

Definition at line 51 of file SHA256.cpp.

Sigma1

#define Sigma1

(

x

)

(S(x, 6) ^ S(x, 11) ^ S(x, 25))

Definition at line 52 of file SHA256.cpp.

STORE32H

#define STORE32H	(		x,
			y
	)

Value:

  { (y)[0] = (ulong8)(((x)>>24)&255); (y)[1] = (ulong8)(((x)>>16)&255);   \
    (y)[2] = (ulong8)(((x)>>8)&255); (y)[3] = (ulong8)((x)&255); }

Definition at line 25 of file SHA256.cpp.

STORE64H

#define STORE64H	(		x,
			y
	)

Value:

  { (y)[0] = (ulong8)(((x)>>56)&255); (y)[1] = (ulong8)(((x)>>48)&255);     \
    (y)[2] = (ulong8)(((x)>>40)&255); (y)[3] = (ulong8)(((x)>>32)&255);     \
    (y)[4] = (ulong8)(((x)>>24)&255); (y)[5] = (ulong8)(((x)>>16)&255);     \
    (y)[6] = (ulong8)(((x)>>8)&255); (y)[7] = (ulong8)((x)&255); }

Definition at line 29 of file SHA256.cpp.

XMEMCMP

#define XMEMCMP   memcmp

Definition at line 37 of file SHA256.cpp.

XMEMCPY

#define XMEMCPY   memcpy

Definition at line 35 of file SHA256.cpp.

Function Documentation

sha256_compress()

static int sha256_compress ( hash_state *  md, const unsigned char *  buf  )

static

Definition at line 56 of file SHA256.cpp.

sha256_done()

int sha256_done	(	hash_state *	md,
		unsigned char *	out
	)

Terminate the hash to get the digest

Parameters

md	The hash state
out	[out] The destination of the hash (32 bytes)

Returns

CRYPT_OK if successful

Definition at line 249 of file SHA256.cpp.

sha256_init()

int sha256_init

(

hash_state *

md

)

Initialize the hash state

Parameters

md	The hash state you wish to initialize

Returns

CRYPT_OK if successful

Definition at line 163 of file SHA256.cpp.

sha256_process()

int sha256_process	(	hash_state *	md,
		const ulong8 *	in,
		ulong32	inlen
	)

Process a block of memory though the hash

Parameters

md	The hash state
in	The data to hash
inlen	The length of the data (octets)

Returns

CRYPT_OK if successful Process a block of memory though the hash

Parameters

md	The hash state
in	The data to hash
inlen	The length of the data (octets)

Returns

CRYPT_OK if successful

Definition at line 195 of file SHA256.cpp.