sha256c.c File Reference

This source file contains the implemention of the SHA256 hash algorithm and variants. More...

#include <sys/cdefs.h>
#include <sys/endian.h>
#include <sys/types.h>
#include <string.h>
#include "sha224.h"
#include "sha256.h"

Macros
#define	be32enc_vect(dst, src, len)    memcpy((void *)dst, (const void *)src, (size_t)len)
#define	be32dec_vect(dst, src, len)    memcpy((void *)dst, (const void *)src, (size_t)len)
#define	Ch(x, y, z)   ((x & (y ^ z)) ^ z)
#define	Maj(x, y, z)   ((x & (y | z)) | (y & z))
#define	SHR(x, n)   (x >> n)
#define	ROTR(x, n)   ((x >> n) | (x << (32 - n)))
#define	S0(x)   (ROTR(x, 2) ^ ROTR(x, 13) ^ ROTR(x, 22))
#define	S1(x)   (ROTR(x, 6) ^ ROTR(x, 11) ^ ROTR(x, 25))
#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	RND(a, b, c, d, e, f, g, h, k)
#define	RNDr(S, W, i, ii)
#define	MSCH(W, ii, i)    W[i + ii + 16] = s1(W[i + ii + 14]) + W[i + ii + 9] + s0(W[i + ii + 1]) + W[i + ii]

Functions
	__FBSDID ("$FreeBSD$")
void	SHA256_Init (SHA256_CTX *ctx)
void	SHA256_Update (SHA256_CTX *ctx, const void *in, size_t len)
void	SHA256_Final (unsigned char digest[static SHA256_DIGEST_LENGTH], SHA256_CTX *ctx)
void	SHA224_Init (SHA224_CTX *ctx)
void	SHA224_Update (SHA224_CTX *ctx, const void *in, size_t len)
void	SHA224_Final (unsigned char digest[static SHA224_DIGEST_LENGTH], SHA224_CTX *ctx)

Detailed Description

This source file contains the implemention of the SHA256 hash algorithm and variants.

Macro Definition Documentation

RND

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

Value:

    h += S1(e) + Ch(e, f, g) + k;           \
    d += h;                     \
    h += S0(a) + Maj(a, b, c);

RNDr

#define RNDr	(		S,
			W,
			i,
			ii
	)

Value:

    RND(S[(64 - i) % 8], S[(65 - i) % 8],   \
        S[(66 - i) % 8], S[(67 - i) % 8],   \
        S[(68 - i) % 8], S[(69 - i) % 8],   \
        S[(70 - i) % 8], S[(71 - i) % 8],   \
        W[i + ii] + K[i + ii])