libavutil/sha1.c File Reference

#include "common.h"
#include "bswap.h"
#include "sha1.h"

Go to the source code of this file.

Data Structures
struct	AVSHA1
Defines
#define	rol(value, bits)   (((value) << (bits)) | ((value) >> (32 - (bits))))
#define	blk0(i)   (block[i] = be2me_32(((const uint32_t*)buffer)[i]))
#define	blk(i)   (block[i] = rol(block[i-3]^block[i-8]^block[i-14]^block[i-16],1))
#define	R0(v, w, x, y, z, i)   z+=((w&(x^y))^y) +blk0(i)+0x5A827999+rol(v,5);w=rol(w,30);
#define	R1(v, w, x, y, z, i)   z+=((w&(x^y))^y) +blk (i)+0x5A827999+rol(v,5);w=rol(w,30);
#define	R2(v, w, x, y, z, i)   z+=( w^x ^y) +blk (i)+0x6ED9EBA1+rol(v,5);w=rol(w,30);
#define	R3(v, w, x, y, z, i)   z+=(((w|x)&y)|(w&x))+blk (i)+0x8F1BBCDC+rol(v,5);w=rol(w,30);
#define	R4(v, w, x, y, z, i)   z+=( w^x ^y) +blk (i)+0xCA62C1D6+rol(v,5);w=rol(w,30);
Functions
static void	transform (uint32_t state[5], const uint8_t buffer[64])
void	av_sha1_init (AVSHA1 *ctx)
void	av_sha1_update (AVSHA1 *ctx, const uint8_t *data, unsigned int len)
void	av_sha1_final (AVSHA1 *ctx, uint8_t digest[20])
Variables
const int	av_sha1_size = sizeof(AVSHA1)

---

Define Documentation

#define blk

(

i

)

(block[i] = rol(block[i-3]^block[i-8]^block[i-14]^block[i-16],1))

Definition at line 38 of file sha1.c.

Referenced by ac3_decode_frame(), bit_alloc_masking(), decode_frame(), dv_calc_mb_coordinates(), dv_init_enc_block(), ff_eac3_decode_transform_coeffs_aht_ch(), ff_eac3_parse_header(), and vb_decode_framedata().

#define blk0

(

i

)

(block[i] = be2me_32(((const uint32_t*)buffer)[i]))

Definition at line 37 of file sha1.c.

#define R0	(	v,
		w,
		x,
		y,
		z,
		i		)	z+=((w&(x^y))^y) +blk0(i)+0x5A827999+rol(v,5);w=rol(w,30);

Definition at line 40 of file sha1.c.

Referenced by altivec_uyvy_rgb32(), altivec_yuv2packedX(), and transform().

#define R1	(	v,
		w,
		x,
		y,
		z,
		i		)	z+=((w&(x^y))^y) +blk (i)+0x5A827999+rol(v,5);w=rol(w,30);

Definition at line 41 of file sha1.c.

#define R2	(	v,
		w,
		x,
		y,
		z,
		i		)	z+=( w^x ^y) +blk (i)+0x6ED9EBA1+rol(v,5);w=rol(w,30);

Definition at line 42 of file sha1.c.

#define R3	(	v,
		w,
		x,
		y,
		z,
		i		)	z+=(((w|x)&y)|(w&x))+blk (i)+0x8F1BBCDC+rol(v,5);w=rol(w,30);

Definition at line 43 of file sha1.c.

#define R4	(	v,
		w,
		x,
		y,
		z,
		i		)	z+=( w^x ^y) +blk (i)+0xCA62C1D6+rol(v,5);w=rol(w,30);

Definition at line 44 of file sha1.c.

Referenced by transform().

#define rol	(	value,
		bits		)	(((value) << (bits)) | ((value) >> (32 - (bits))))

Definition at line 34 of file sha1.c.

Referenced by transform().

---

Function Documentation

void av_sha1_final	(	AVSHA1 *	ctx,
		uint8_t	digest[20]
	)

Definition at line 135 of file sha1.c.

void av_sha1_init

(

AVSHA1 *

ctx

)

Definition at line 99 of file sha1.c.

void av_sha1_update	(	AVSHA1 *	ctx,
		const uint8_t *	data,
		unsigned int	len
	)

Definition at line 108 of file sha1.c.

Referenced by av_sha1_final().

static void transform	(	uint32_t	state[5],
		const uint8_t	buffer[64]
	)			[static]

Definition at line 48 of file sha1.c.

Referenced by av_sha1_update(), and reverse_dc_prediction().

---

Variable Documentation

const int av_sha1_size = sizeof(AVSHA1)

Definition at line 32 of file sha1.c.