sha256.c File Reference

#include <sys/types.h>
#include <stdint.h>
#include <string.h>
#include "sysendian.h"
#include "sha256.h"

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Macros
#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, k)

Functions
void	libscrypt_SHA256_Init (SHA256_CTX *ctx)
void	libscrypt_SHA256_Update (SHA256_CTX *ctx, const void *in, size_t len)
void	libscrypt_SHA256_Final (unsigned char digest[32], SHA256_CTX *ctx)
void	libscrypt_HMAC_SHA256_Init (HMAC_SHA256_CTX *ctx, const void *_K, size_t Klen)
void	libscrypt_HMAC_SHA256_Update (HMAC_SHA256_CTX *ctx, const void *in, size_t len)
void	libscrypt_HMAC_SHA256_Final (unsigned char digest[32], HMAC_SHA256_CTX *ctx)
void	libscrypt_PBKDF2_SHA256 (const uint8_t *passwd, size_t passwdlen, const uint8_t *salt, size_t saltlen, uint64_t c, uint8_t *buf, size_t dkLen)
	PBKDF2_SHA256(passwd, passwdlen, salt, saltlen, c, buf, dkLen): Compute PBKDF2(passwd, salt, c, dkLen) using HMAC-SHA256 as the PRF, and write the output to buf. More...

Macro Definition Documentation

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

Definition at line 63 of file sha256.c.

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

Definition at line 64 of file sha256.c.

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

Value:

t0 = h + S1(e) + Ch(e, f, g) + k;               \
	t1 = S0(a) + Maj(a, b, c);                     \
	d += t0;                                       \
	h  = t0 + t1;

Definition at line 73 of file sha256.c.

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

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] + k)

Definition at line 80 of file sha256.c.

#define ROTR	(		x,
			n
	)		((x >> n) | (x << (32 - n)))

Definition at line 66 of file sha256.c.

#define S0

(

x

)

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

Definition at line 67 of file sha256.c.

#define s0

(

x

)

(ROTR(x, 7) ^ ROTR(x, 18) ^ SHR(x, 3))

Definition at line 69 of file sha256.c.

#define S1

(

x

)

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

Definition at line 68 of file sha256.c.

#define s1

(

x

)

(ROTR(x, 17) ^ ROTR(x, 19) ^ SHR(x, 10))

Definition at line 70 of file sha256.c.

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

Definition at line 65 of file sha256.c.

Function Documentation

void libscrypt_HMAC_SHA256_Final	(	unsigned char	digest[32],
		HMAC_SHA256_CTX *	ctx
	)

Definition at line 339 of file sha256.c.

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void libscrypt_HMAC_SHA256_Init	(	HMAC_SHA256_CTX *	ctx,
		const void *	_K,
		size_t	Klen
	)

Definition at line 294 of file sha256.c.

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void libscrypt_HMAC_SHA256_Update	(	HMAC_SHA256_CTX *	ctx,
		const void *	in,
		size_t	len
	)

Definition at line 330 of file sha256.c.

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void libscrypt_PBKDF2_SHA256	(	const uint8_t *	passwd,
		size_t	passwdlen,
		const uint8_t *	salt,
		size_t	saltlen,
		uint64_t	c,
		uint8_t *	buf,
		size_t	dkLen
	)

PBKDF2_SHA256(passwd, passwdlen, salt, saltlen, c, buf, dkLen): Compute PBKDF2(passwd, salt, c, dkLen) using HMAC-SHA256 as the PRF, and write the output to buf.

The value dkLen must be at most 32 * (2^32 - 1).

Definition at line 362 of file sha256.c.

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void libscrypt_SHA256_Final	(	unsigned char	digest[32],
		SHA256_CTX *	ctx
	)

Definition at line 279 of file sha256.c.

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void libscrypt_SHA256_Init

(

SHA256_CTX *

ctx

)

Definition at line 214 of file sha256.c.

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void libscrypt_SHA256_Update	(	SHA256_CTX *	ctx,
		const void *	in,
		size_t	len
	)

Definition at line 233 of file sha256.c.

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