NAME

       gnutls_psk_set_client_credentials_function - API function

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 type.

       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().   The   username
       should  be an ASCII string or UTF-8 string. In case of a UTF-8 string it is recommended to
       be following the PRECIS framework for usernames (rfc8265).

       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 <bugs@gnutls.org>.
       Home page: https://www.gnutls.org

COPYRIGHT

       Copyright © 2001- 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

       https://www.gnutls.org/manual/