gnutls_prf_raw - API function
int gnutls_prf_raw(gnutls_session_t session, size_t
label_size, const char * label, size_t
seed_size, const char * seed, size_t
outsize, char * out);
- gnutls_session_t session
- is a gnutls_session_t type.
- size_t label_size
- length of the label variable.
- const char * label
- label used in PRF computation, typically a short string.
- size_t seed_size
- length of the seed variable.
- const char * seed
- optional extra data to seed the PRF with.
- size_t outsize
- size of pre-allocated output buffer to hold the output.
- char * out
- pre-allocated buffer to hold the generated data.
Apply the TLS Pseudo-Random-Function (PRF) on the master secret and the provided
variable usually contains a string denoting the purpose for the
generated data. The seed
usually contains data such as the client and
server random, perhaps together with some additional data that is added to
guarantee uniqueness of the output for a particular purpose.
Because the output is not guaranteed to be unique for a particular session
includes the client random and server random fields (the
PRF would output the same data on another connection resumed from the first
one), it is not recommended to use this function directly. The
function seeds the PRF with the client and server random
fields directly, and is recommended if you want to generate pseudo random data
unique for each session.
This function will only operate under TLS versions prior to 1.3. In TLS1.3 the
use of PRF is replaced with HKDF and the generic exporters like
should be used instead. Under TLS1.3 this function
on success, or an error code.
Report bugs to <email@example.com>.
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