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NAME

       gnutls_psk_set_client_credentials_function  - Used to set a callback to
       retrieve the username and key

SYNOPSIS

       #include <gnutls/gnutls.h>

       void
       gnutls_psk_set_client_credentials_function(gnutls_psk_client_credentials_t
       cred, gnutls_psk_client_credentials_function          * func);

ARGUMENTS

       gnutls_psk_client_credentials_t          cred
                   is a gnutls_psk_server_credentials_t structure.

       gnutls_psk_client_credentials_function          * func
                   is the callback function

DESCRIPTION

       This function can be used to set a callback to  retrieve  the  username
       and  password  for  client PSK authentication.  The callback’s function
       form   is:   int   (*callback)(gnutls_session_t,    char**    username,
       gnutls_datum_t* key);

       The  username  and  key->data  must be allocated using gnutls_malloc().
       username should be ASCII strings or UTF-8 strings  prepared  using  the
       "SASLprep" profile of "stringprep".

       The callback function will be called once per handshake.

       The  callback  function  should  return  0 on success.  -1 indicates an
       error.

REPORTING BUGS

       Report   bugs   to    <bug-gnutls@gnu.org>.     GnuTLS    home    page:
       http://www.gnu.org/software/gnutls/  General  help  using GNU software:
       http://www.gnu.org/gethelp/

COPYRIGHT

       Copyright © 2008 Free Software Foundation.
       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  info  and gnutls programs are properly installed at your site,
       the command

              info gnutls

       should give you access to the complete manual.

gnutls                           gnutls8psk_set_client_credentials_function(3)