sha512.c File Reference

#include <string.h>
#include "attributes.h"
#include "avutil.h"
#include "bswap.h"
#include "sha512.h"
#include "intreadwrite.h"
#include "mem.h"

Go to the source code of this file.

Data Structures
struct	AVSHA512
	hash context More...

Macros
#define	ror(value, bits)   (((value) >> (bits)) | ((value) << (64 - (bits))))
#define	Ch(x, y, z)   (((x) & ((y) ^ (z))) ^ (z))
#define	Maj(z, y, x)   ((((x) | (y)) & (z)) | ((x) & (y)))
#define	Sigma0_512(x)   (ror((x), 28) ^ ror((x), 34) ^ ror((x), 39))
#define	Sigma1_512(x)   (ror((x), 14) ^ ror((x), 18) ^ ror((x), 41))
#define	sigma0_512(x)   (ror((x), 1) ^ ror((x), 8) ^ ((x) >> 7))
#define	sigma1_512(x)   (ror((x), 19) ^ ror((x), 61) ^ ((x) >> 6))
#define	blk0(i)   (block[i] = AV_RB64(buffer + 8 * (i)))
#define	blk(i)
#define	ROUND512(a, b, c, d, e, f, g, h)
#define	ROUND512_0_TO_15(a, b, c, d, e, f, g, h)
#define	ROUND512_16_TO_80(a, b, c, d, e, f, g, h)

Functions
struct AVSHA512 *	av_sha512_alloc (void)
	Allocate an AVSHA512 context.
static void	sha512_transform (uint64_t *state, const uint8_t buffer[128])
av_cold int	av_sha512_init (AVSHA512 *ctx, int bits)
	Initialize SHA-2 512 hashing.
void	av_sha512_update (AVSHA512 *ctx, const uint8_t *data, unsigned int len)
	Update hash value.
void	av_sha512_final (AVSHA512 *ctx, uint8_t *digest)
	Finish hashing and output digest value.

Variables
const int	av_sha512_size = sizeof(AVSHA512)
static const uint64_t	K512 [80]

Macro Definition Documentation

#define ror	(		value,
			bits
	)		(((value) >> (bits)) | ((value) << (64 - (bits))))

Definition at line 91 of file sha512.c.

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

Definition at line 93 of file sha512.c.

Referenced by sha512_transform().

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

Definition at line 94 of file sha512.c.

Referenced by sha512_transform().

#define Sigma0_512

(

x

)

(ror((x), 28) ^ ror((x), 34) ^ ror((x), 39))

Definition at line 96 of file sha512.c.

Referenced by sha512_transform().

#define Sigma1_512

(

x

)

(ror((x), 14) ^ ror((x), 18) ^ ror((x), 41))

Definition at line 97 of file sha512.c.

Referenced by sha512_transform().

#define sigma0_512

(

x

)

(ror((x), 1) ^ ror((x), 8) ^ ((x) >> 7))

Definition at line 98 of file sha512.c.

#define sigma1_512

(

x

)

(ror((x), 19) ^ ror((x), 61) ^ ((x) >> 6))

Definition at line 99 of file sha512.c.

#define blk0

(

i

)

(block[i] = AV_RB64(buffer + 8 * (i)))

Definition at line 101 of file sha512.c.

Referenced by sha512_transform().

#define blk

(

i

)

Value:

(block[i] = block[i - 16] + sigma0_512(block[i - 15]) + \
                            sigma1_512(block[i - 2]) + block[i - 7])

Definition at line 102 of file sha512.c.

Referenced by sha512_transform().

#define ROUND512	(		a,
			b,
			c,
			d,
			e,
			f,
			g,
			h
	)

Value:

T1 += (h) + Sigma1_512(e) + Ch((e), (f), (g)) + K512[i]; \
    (d) += T1; \
    (h) = T1 + Sigma0_512(a) + Maj((a), (b), (c)); \
    i++

Definition at line 105 of file sha512.c.

#define ROUND512_0_TO_15	(		a,
			b,
			c,
			d,
			e,
			f,
			g,
			h
	)

Value:

T1 = blk0(i); \
    ROUND512(a,b,c,d,e,f,g,h)

Definition at line 111 of file sha512.c.

Referenced by sha512_transform().

#define ROUND512_16_TO_80	(		a,
			b,
			c,
			d,
			e,
			f,
			g,
			h
	)

Value:

T1 = blk(i); \
    ROUND512(a,b,c,d,e,f,g,h)

Definition at line 115 of file sha512.c.

Referenced by sha512_transform().

Function Documentation

static void sha512_transform ( uint64_t *  state, const uint8_t  buffer[128]  )

static

Definition at line 119 of file sha512.c.

Referenced by av_sha512_update().

Variable Documentation

const uint64_t K512[80]

static

Definition at line 48 of file sha512.c.

Referenced by sha512_transform().