sha256.c File Reference

#include <stdlib.h>
#include <memory.h>
#include "crypto/sha256.h"

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Macros
#define	ROTLEFT(a, b)
#define	ROTRIGHT(a, b)
#define	CH(x, y, z)
#define	MAJ(x, y, z)
#define	EP0(x)
#define	EP1(x)
#define	SIG0(x)
#define	SIG1(x)

Functions
void	sha256_transform (SHA256_CTX *ctx, const BYTE data[])
void	sha256_init (SHA256_CTX *ctx)
void	sha256_update (SHA256_CTX *ctx, const BYTE data[], size_t len)
void	sha256_final (SHA256_CTX *ctx, BYTE hash[])
void	CRYPT_compute_sha256_hash (const uint8_t message[], size_t message_length, uint8_t hash[32])
	Computes the SHA256 hash of the message and stores the 32 byte hash at hash.

Variables
static const WORD	k [64]

Macro Definition Documentation

CH

#define CH	(		x,
			y,
			z )

Value:

(((x) & (y)) ^ (~(x) & (z)))

EP0

#define EP0

(

x

)

Value:

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

EP1

#define EP1

(

x

)

Value:

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

MAJ

#define MAJ	(		x,
			y,
			z )

Value:

(((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))

ROTLEFT

#define ROTLEFT	(		a,
			b )

Value:

(((a) << (b)) | ((a) >> (32-(b))))

ROTRIGHT

#define ROTRIGHT	(		a,
			b )

Value:

(((a) >> (b)) | ((a) << (32-(b))))

SIG0

#define SIG0

(

x

)

Value:

(ROTRIGHT(x,7) ^ ROTRIGHT(x,18) ^ ((x) >> 3))

SIG1

#define SIG1

(

x

)

Value:

(ROTRIGHT(x,17) ^ ROTRIGHT(x,19) ^ ((x) >> 10))

Function Documentation

CRYPT_compute_sha256_hash()

void CRYPT_compute_sha256_hash	(	const uint8_t	message[],
		size_t	message_length,
		uint8_t	hash[32] )

Computes the SHA256 hash of the message and stores the 32 byte hash at hash.

Parameters

[in]	message	The message to hash
[in]	message_length	Length of the message in bytes
[out]	hash	Where the 32 byte hash is stored

Note

Hashing 20x 4 KiB messages takes ~490ms.

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sha256_final()

void sha256_final	(	SHA256_CTX *	ctx,
		BYTE	hash[] )

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sha256_init()

void sha256_init

(

SHA256_CTX *

ctx

)

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sha256_transform()

void sha256_transform	(	SHA256_CTX *	ctx,
		const BYTE	data[] )

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sha256_update()

void sha256_update	(	SHA256_CTX *	ctx,
		const BYTE	data[],
		size_t	len )

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Variable Documentation

k

const WORD k[64]

static

Initial value:

= {
    0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5,0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5,
    0xd807aa98,0x12835b01,0x243185be,0x550c7dc3,0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174,
    0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc,0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da,
    0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7,0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967,
    0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13,0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85,
    0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3,0xd192e819,0xd6990624,0xf40e3585,0x106aa070,
    0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5,0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3,
    0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208,0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2
}