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gnutls_prf_raw(3) gnutls gnutls_prf_raw(3) NAME gnutls_prf_raw - API function SYNOPSIS #include <gnutls/gnutls.h> 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); ARGUMENTS 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. DESCRIPTION Apply the TLS Pseudo-Random-Function (PRF) on the master secret and the provided data. The label 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 ses- sion unless seed 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 gnutls_prf() function seeds the PRF with the client and server ran- dom fields directly, and is recommended if you want to generate pseudo random data unique for each session. NOTE 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 gnutls_prf_rfc5705() should be used instead. Under TLS1.3 this function returns GNUTLS_E_INVALID_REQUEST. RETURNS GNUTLS_E_SUCCESS on success, or an error code. REPORTING BUGS Report bugs to <bugs@gnutls.org>. Home page: https://www.gnutls.org COPYRIGHT Copyright (C) 2001-2023 Free Software Foundation, Inc., and others. Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright no- tice and this notice are preserved. SEE ALSO The full documentation for gnutls is maintained as a Texinfo manual. If the /usr/local/share/doc/gnutls/ directory does not contain the HTML form visit https://www.gnutls.org/manual/ gnutls 3.8.9 gnutls_prf_raw(3)
NAME | SYNOPSIS | ARGUMENTS | DESCRIPTION | NOTE | RETURNS | REPORTING BUGS | COPYRIGHT | SEE ALSO
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