Crypto and Hashing

Modules
	AES
	AES-CTR
	Base64
	Blowfish
	CAMELLIA
	CAST5
	DES
	Hash Functions
	HMAC
	LZO
	RC4
	TEA
	TWOFISH
	XTEA

Functions
uint32_t	av_get_random_seed (void)
	Get a seed to use in conjunction with random functions. More...
int	av_random_bytes (uint8_t *buf, size_t len)
	Generate cryptographically secure random data, i.e. More...

Detailed Description

Function Documentation

av_get_random_seed()

uint32_t av_get_random_seed

(

void

)

Get a seed to use in conjunction with random functions.

This function tries to provide a good seed at a best effort bases. Its possible to call this function multiple times if more bits are needed. It can be quite slow, which is why it should only be used as seed for a faster PRNG. The quality of the seed depends on the platform.

Definition at line 167 of file random_seed.c.

Referenced by av_aes_ctr_set_random_iv(), av_parse_color(), config_input(), config_output(), config_props(), do_adobe_auth(), do_llnw_auth(), init(), main(), make_digest_auth(), mkv_init(), mxf_gen_umid(), ogg_init(), prompeg_init(), rtmp_server_handshake(), rtp_write_header(), rtsp_read_setup(), and sap_write_header().

av_random_bytes()

int av_random_bytes	(	uint8_t *	buf,
		size_t	len
	)

Generate cryptographically secure random data, i.e.

suitable for use as encryption keys and similar.

Parameters

buf	buffer into which the random data will be written
len	size of buf in bytes

Return values

0	success, len bytes of random data was written into buf
a negative AVERROR code	random data could not be generated

Definition at line 130 of file random_seed.c.

Referenced by av_get_random_seed(), and do_encrypt().