libavutil/sha.c File Reference

#include <string.h>
#include "avutil.h"
#include "bswap.h"
#include "sha.h"
#include "intreadwrite.h"

Go to the source code of this file.

Data Structures

struct AVSHA

hash context More...

Defines

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

#define blk0(i)   (block[i] = av_be2ne32(((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);

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

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

#define Sigma0_256(x)   (rol((x), 30) ^ rol((x), 19) ^ rol((x), 10))

#define Sigma1_256(x)   (rol((x), 26) ^ rol((x), 21) ^ rol((x), 7))

#define sigma0_256(x)   (rol((x), 25) ^ rol((x), 14) ^ ((x) >> 3))

#define sigma1_256(x)   (rol((x), 15) ^ rol((x), 13) ^ ((x) >> 10))

#define blk(i)

#define ROUND256(a, b, c, d, e, f, g, h)

#define ROUND256_0_TO_15(a, b, c, d, e, f, g, h)

#define ROUND256_16_TO_63(a, b, c, d, e, f, g, h)

Functions

static void sha1_transform (uint32_t state[5], const uint8_t buffer[64])

static void sha256_transform (uint32_t *state, const uint8_t buffer[64])

int av_sha_init (AVSHA *ctx, int bits)

Initialize SHA-1 or SHA-2 hashing.

void av_sha_update (AVSHA *ctx, const uint8_t *data, unsigned int len)

Update hash value.

void av_sha_final (AVSHA *ctx, uint8_t *digest)

Finish hashing and output digest value.

Variables

const int av_sha_size = sizeof(AVSHA)

static const uint32_t K256 [64]

Define Documentation

#define blk ( i )

Value:

(block[i] = block[i - 16] + sigma0_256(block[i - 15]) + \
                            sigma1_256(block[i - 2]) + block[i - 7])

Definition at line 163 of file sha.c.

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

Definition at line 163 of file sha.c.

Referenced by ac3_compute_mantissa_size_c(), ac3_decode_frame(), ac3_exponent_min_c(), allocate_buffers(), apply_channel_coupling(), apply_mdct(), apply_rematrixing(), bink_decode_plane(), binkb_decode_plane(), bit_alloc(), bit_alloc_masking(), compute_coupling_strategy(), compute_exp_strategy(), compute_rematrixing_strategy(), count_frame_bits(), count_frame_bits_fixed(), count_mantissa_bits_init(), count_mantissa_bits_update_ch(), decode_frame(), downgrade_exponents(), dv_calc_mb_coordinates(), dv_init_enc_block(), encode_exponents(), ff_ac3_encode_close(), ff_eac3_decode_transform_coeffs_aht_ch(), ff_eac3_output_frame_header(), ff_eac3_parse_header(), ff_eac3_set_cpl_states(), ff_ivi_decode_blocks(), ff_ivi_process_empty_tile(), group_exponents(), output_frame(), quantize_mantissas(), reset_block_bap(), scale_coefficients(), set_bandwidth(), sha256_transform(), and vb_decode_framedata().

#define blk0 ( i ) (block[i] = av_be2ne32(((const uint32_t*)buffer)[i]))

Definition at line 45 of file sha.c.

Referenced by sha256_transform().

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

Definition at line 154 of file sha.c.

Referenced by sha256_transform().

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

Definition at line 155 of file sha.c.

Referenced by sha256_transform().

#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 48 of file sha.c.

Referenced by altivec_uyvy_rgb32(), ff_yuv2packedX_altivec(), and sha1_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 49 of file sha.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 50 of file sha.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 51 of file sha.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 52 of file sha.c.

Referenced by sha1_transform().

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

Definition at line 42 of file sha.c.

Referenced by sha1_transform().

#define ROUND256	(	a,
		b,
		c,
		d,
		e,
		f,
		g,
		h	)

Value:

T1 += (h) + Sigma1_256(e) + Ch((e), (f), (g)) + K256[i]; \
    (d) += T1; \
    (h) = T1 + Sigma0_256(a) + Maj((a), (b), (c)); \
    i++

Definition at line 166 of file sha.c.

#define ROUND256_0_TO_15	(	a,
		b,
		c,
		d,
		e,
		f,
		g,
		h	)

Value:

T1 = blk0(i); \
    ROUND256(a,b,c,d,e,f,g,h)

Definition at line 172 of file sha.c.

Referenced by sha256_transform().

#define ROUND256_16_TO_63	(	a,
		b,
		c,
		d,
		e,
		f,
		g,
		h	)

Value:

T1 = blk(i); \
    ROUND256(a,b,c,d,e,f,g,h)

Definition at line 176 of file sha.c.

Referenced by sha256_transform().

#define sigma0_256 ( x ) (rol((x), 25) ^ rol((x), 14) ^ ((x) >> 3))

Definition at line 159 of file sha.c.

#define Sigma0_256 ( x ) (rol((x), 30) ^ rol((x), 19) ^ rol((x), 10))

Definition at line 157 of file sha.c.

Referenced by sha256_transform().

#define sigma1_256 ( x ) (rol((x), 15) ^ rol((x), 13) ^ ((x) >> 10))

Definition at line 160 of file sha.c.

#define Sigma1_256 ( x ) (rol((x), 26) ^ rol((x), 21) ^ rol((x), 7))

Definition at line 158 of file sha.c.

Referenced by sha256_transform().

Function Documentation

void av_sha_final	(	struct AVSHA *	context,
		uint8_t *	digest
	)

Finish hashing and output digest value.

Parameters:

	context	hash function context
	digest	buffer where output digest value is stored

Definition at line 313 of file sha.c.

Referenced by rtmp_calc_digest().

int av_sha_init	(	struct AVSHA *	context,
		int	bits
	)

Initialize SHA-1 or SHA-2 hashing.

Parameters:

	context	pointer to the function context (of size av_sha_size)
	bits	number of bits in digest (SHA-1 - 160 bits, SHA-2 224 or 256 bits)

Returns:: zero if initialization succeeded, -1 otherwise

Definition at line 245 of file sha.c.

Referenced by rtmp_calc_digest().

void av_sha_update	(	struct AVSHA *	context,
		const uint8_t *	data,
		unsigned int	len
	)

Update hash value.

Parameters:

	context	hash function context
	data	input data to update hash with
	len	input data length

Definition at line 286 of file sha.c.

Referenced by av_sha_final(), and rtmp_calc_digest().

static void sha1_transform	(	uint32_t	state[5],
		const uint8_t	buffer[64]
	)			`[static]`

Definition at line 56 of file sha.c.

Referenced by av_sha_init().

static void sha256_transform	(	uint32_t *	state,
		const uint8_t	buffer[64]
	)			`[static]`

Definition at line 180 of file sha.c.

Referenced by av_sha_init().

Variable Documentation

const int av_sha_size = sizeof(AVSHA)

Definition at line 40 of file sha.c.

Referenced by rtmp_calc_digest().

const uint32_t K256[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
}

Definition at line 134 of file sha.c.

Referenced by sha256_transform().


Data Structures
struct	AVSHA
	hash context More...
Defines
#define	rol(value, bits) (((value) << (bits)) \| ((value) >> (32 - (bits))))
#define	blk0(i) (block[i] = av_be2ne32(((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);
#define	Ch(x, y, z) (((x) & ((y) ^ (z))) ^ (z))
#define	Maj(x, y, z) ((((x) \| (y)) & (z)) \| ((x) & (y)))
#define	Sigma0_256(x) (rol((x), 30) ^ rol((x), 19) ^ rol((x), 10))
#define	Sigma1_256(x) (rol((x), 26) ^ rol((x), 21) ^ rol((x), 7))
#define	sigma0_256(x) (rol((x), 25) ^ rol((x), 14) ^ ((x) >> 3))
#define	sigma1_256(x) (rol((x), 15) ^ rol((x), 13) ^ ((x) >> 10))
#define	blk(i)
#define	ROUND256(a, b, c, d, e, f, g, h)
#define	ROUND256_0_TO_15(a, b, c, d, e, f, g, h)
#define	ROUND256_16_TO_63(a, b, c, d, e, f, g, h)
Functions
static void	sha1_transform (uint32_t state[5], const uint8_t buffer[64])
static void	sha256_transform (uint32_t *state, const uint8_t buffer[64])
int	av_sha_init (AVSHA *ctx, int bits)
	Initialize SHA-1 or SHA-2 hashing.
void	av_sha_update (AVSHA ctx, const uint8_t data, unsigned int len)
	Update hash value.
void	av_sha_final (AVSHA ctx, uint8_t digest)
	Finish hashing and output digest value.
Variables
const int	av_sha_size = sizeof(AVSHA)
static const uint32_t	K256 [64]