NAME

       gnutls_psk_set_server_credentials_function - API function

SYNOPSIS

       #include <gnutls/gnutls.h>

       void            gnutls_psk_set_server_credentials_function(gnutls_psk_server_credentials_t
       cred, gnutls_psk_server_credentials_function         * func);

ARGUMENTS

       gnutls_psk_server_credentials_t         cred
                   is a gnutls_psk_server_credentials_t type.

       gnutls_psk_server_credentials_function         * func
                   is the callback function

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);

        username  contains  the  actual  username.   The   key  must  be  filled  in  using   the
       gnutls_malloc().

       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.

REPORTING BUGS

       Report bugs to <bugs@gnutls.org>.
       Home page: http://www.gnutls.org

COPYRIGHT

       Copyright © 2001-2021 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 notice and this notice are preserved.

SEE ALSO

       The  full  documentation  for  gnutls  is  maintained  as  a  Texinfo  manual.    If   the
       /usr/share/doc/gnutls/ directory does not contain the HTML form visit

       http://www.gnutls.org/manual/