NAME

       gnutls_psk_set_server_credentials_function3 - API function

SYNOPSIS

       #include <gnutls/gnutls.h>

       void           gnutls_psk_set_server_credentials_function3(gnutls_psk_server_credentials_t          cred,
       gnutls_psk_server_credentials_function3 func);

ARGUMENTS

       gnutls_psk_server_credentials_t cred
                   is a gnutls_psk_server_credentials_t type.

       gnutls_psk_server_credentials_function3 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 gnutls_datum_t* username, gnutls_datum_t* key,
       gnutls_psk_key_flags *flags);

       This callback function has the same semantics as that  of  gnutls_psk_set_server_credentials_function2(),
       but  it  returns  flags  associated  with the key.  The callback may import external PSK using the method
       described in RFC 9258 by using gnutls_psk_format_imported_identity().

        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: https://www.gnutls.org

COPYRIGHT

       Copyright © 2001-2023 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/