sha2.C File Reference

#include "Util/sha2.H"
#include <string.h>

Include dependency graph for sha2.C:

Go to the source code of this file.

Defines
#define	GET_UINT32(n, b, i)
#define	PUT_UINT32(n, b, i)
#define	SHR(x, n)   ((x & 0xFFFFFFFF) >> n)
#define	ROTR(x, n)   (SHR(x,n) | (x << (32 - n)))
#define	S0(x)   (ROTR(x, 7) ^ ROTR(x,18) ^ SHR(x, 3))
#define	S1(x)   (ROTR(x,17) ^ ROTR(x,19) ^ SHR(x,10))
#define	S2(x)   (ROTR(x, 2) ^ ROTR(x,13) ^ ROTR(x,22))
#define	S3(x)   (ROTR(x, 6) ^ ROTR(x,11) ^ ROTR(x,25))
#define	F0(x, y, z)   ((x & y) | (z & (x | y)))
#define	F1(x, y, z)   (z ^ (x & (y ^ z)))
#define	R(t)
#define	P(a, b, c, d, e, f, g, h, x, K)
Typedefs
typedef byte	uint8
Functions
void	sha256_starts (sha256_context *ctx)
void	sha256_process (sha256_context *ctx, const uint8 data[64])
void	sha256_update (sha256_context *ctx, const uint8 *input, uint32 length)
void	sha256_finish (sha256_context *ctx, uint8 digest[32])
Variables
static uint8	sha256_padding [64]

---

Detailed Description

general sha2 (256-bit) message-digest implementation

Definition in file sha2.C.

---

Define Documentation

#define GET_UINT32	(	n,
		b,
		i		)

Value:

{                                               \
    (n) = ( (uint32) (b)[(i)    ] << 24 )       \
        | ( (uint32) (b)[(i) + 1] << 16 )       \
        | ( (uint32) (b)[(i) + 2] <<  8 )       \
        | ( (uint32) (b)[(i) + 3]       );      \
}

Definition at line 41 of file sha2.C.

#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;              \
}

#define PUT_UINT32	(	n,
		b,
		i		)

Value:

{                                               \
    (b)[(i)    ] = (uint8) ( (n) >> 24 );       \
    (b)[(i) + 1] = (uint8) ( (n) >> 16 );       \
    (b)[(i) + 2] = (uint8) ( (n) >>  8 );       \
    (b)[(i) + 3] = (uint8) ( (n)       );       \
}

Definition at line 49 of file sha2.C.

#define R

(

t

)

Value:

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

---

Variable Documentation

uint8 sha256_padding[64] [static]

Initial value:

{
 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
}

Definition at line 242 of file sha2.C.