.\" DO NOT MODIFY THIS FILE!  It was generated by gdoc.
.TH "gnutls_psk_set_server_credentials_function" 3 "3.6.7" "gnutls" "gnutls"
.SH NAME
gnutls_psk_set_server_credentials_function \- API function
.SH SYNOPSIS
.B #include <gnutls/gnutls.h>
.sp
.BI "void gnutls_psk_set_server_credentials_function(gnutls_psk_server_credentials_t         " cred ", gnutls_psk_server_credentials_function         * " func ");"
.SH ARGUMENTS
.IP "gnutls_psk_server_credentials_t         cred" 12
is a \fBgnutls_psk_server_credentials_t\fP type.
.IP "gnutls_psk_server_credentials_function         * func" 12
is the callback function
.SH "DESCRIPTION"
This function can be used to set a callback to retrieve the user's PSK credentials.
The callback's function form is:
int (*callback)(gnutls_session_t, const char* username,
gnutls_datum_t* key);

 \fIusername\fP contains the actual username.
The  \fIkey\fP must be filled in using the \fBgnutls_malloc()\fP.

In case the callback returned a negative number then gnutls will
assume that the username does not exist.

The callback function will only be called once per handshake.  The
callback function should return 0 on success, while \-1 indicates
an error.
.SH "REPORTING BUGS"
Report bugs to <bugs@gnutls.org>.
.br
Home page: https://www.gnutls.org

.SH COPYRIGHT
Copyright \(co 2001-2021 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