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 196 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(), ff_perlin_init(), init(), initialize(), main(), make_digest_auth(), mkv_init(), mxf_gen_umid(), ogg_init(), openssl_gen_certificate(), prompeg_init(), rtmp_server_handshake(), rtp_write_header(), rtsp_read_setup(), sap_write_header(), and test_apv_entropy_decode_block().

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 159 of file random_seed.c.

Referenced by av_get_random_seed(), do_encrypt(), and initialize().