FFmpeg: SHA

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SHA

Hash Functions

SHA-1 and SHA-256 (Secure Hash Algorithm) hash function implementations. More...

Files

file sha.h

Public header for SHA-1 & SHA-256 hash function implementations.

Functions

struct AVSHA * av_sha_alloc (void)

Allocate an AVSHA context. More...

int av_sha_init (struct AVSHA *context, int bits)

Initialize SHA-1 or SHA-2 hashing. More...

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

Update hash value. More...

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

Finish hashing and output digest value. More...

Variables

const int av_sha_size

Detailed Description

SHA-1 and SHA-256 (Secure Hash Algorithm) hash function implementations.

This module supports the following SHA hash functions:

SHA-1: 160 bits
SHA-224: 224 bits, as a variant of SHA-2
SHA-256: 256 bits, as a variant of SHA-2

See Also: For SHA-384, SHA-512, and variants thereof, see SHA-512.

Function Documentation

struct AVSHA* av_sha_alloc ( void )

Allocate an AVSHA context.

Definition at line 45 of file sha.c.

Referenced by av_hash_alloc(), av_hmac_alloc(), main(), mkv_write_attachments(), and mov_read_adrm().

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 273 of file sha.c.

Referenced by av_hash_init(), get_generic_seed(), main(), mkv_write_attachments(), and mov_read_adrm().

void av_sha_update ( struct AVSHA * ctx,

const uint8_t * data,

unsigned int len

)

Update hash value.

Parameters: ctx hash function context

data input data to update hash with

len input data length

Definition at line 315 of file sha.c.

Referenced by av_hash_update(), av_hmac_alloc(), av_sha_final(), get_generic_seed(), main(), mkv_write_attachments(), and mov_read_adrm().

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 345 of file sha.c.

Referenced by av_hash_final(), av_hmac_alloc(), get_generic_seed(), main(), mkv_write_attachments(), and mov_read_adrm().

Variable Documentation

const int av_sha_size

Definition at line 43 of file sha.c.

Referenced by get_generic_seed().

Generated on Sun May 13 2018 02:04:27 for FFmpeg by doxygen 1.8.6