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+.\" DO NOT MODIFY THIS FILE!  It was generated by gdoc.
+.TH "gnutls_prf_raw" 3 "3.7.9" "gnutls" "gnutls"
+.SH NAME
+gnutls_prf_raw \- API function
+.SH SYNOPSIS
+.B #include <gnutls/gnutls.h>
+.sp
+.BI "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 ");"
+.SH ARGUMENTS
+.IP "gnutls_session_t session" 12
+is a \fBgnutls_session_t\fP type.
+.IP "size_t label_size" 12
+length of the  \fIlabel\fP variable.
+.IP "const char * label" 12
+label used in PRF computation, typically a short string.
+.IP "size_t seed_size" 12
+length of the  \fIseed\fP variable.
+.IP "const char * seed" 12
+optional extra data to seed the PRF with.
+.IP "size_t outsize" 12
+size of pre\-allocated output buffer to hold the output.
+.IP "char * out" 12
+pre\-allocated buffer to hold the generated data.
+.SH "DESCRIPTION"
+Apply the TLS Pseudo\-Random\-Function (PRF) on the master secret
+and the provided data.
+
+The  \fIlabel\fP variable usually contains a string denoting the purpose
+for the generated data.  The  \fIseed\fP 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 unless  \fIseed\fP 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 \fBgnutls_prf()\fP 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.
+.SH "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 \fBgnutls_prf_rfc5705()\fP should be used instead. Under
+TLS1.3 this function returns \fBGNUTLS_E_INVALID_REQUEST\fP.
+.SH "RETURNS"
+\fBGNUTLS_E_SUCCESS\fP on success, or an error code.
+.SH "REPORTING BUGS"
+Report bugs to <bugs@gnutls.org>.
+.br
+Home page: https://www.gnutls.org
+
+.SH COPYRIGHT
+Copyright \(co 2001- Free Software Foundation, Inc., and others.
+.br
+Copying and distribution of this file, with or without modification,
+are permitted in any medium without royalty provided the copyright
+notice and this notice are preserved.
+.SH "SEE ALSO"
+The full documentation for
+.B gnutls
+is maintained as a Texinfo manual.
+If the /usr/share/doc/gnutls/
+directory does not contain the HTML form visit
+.B
+.IP https://www.gnutls.org/manual/
+.PP