NAME

       gnutls_hmac_copy - API function

SYNOPSIS

       #include <gnutls/crypto.h>

       gnutls_hmac_hd_t gnutls_hmac_copy(gnutls_hmac_hd_t handle);

ARGUMENTS

       gnutls_hmac_hd_t handle
                   is a gnutls_hmac_hd_t type

DESCRIPTION

       This function will create a copy of MAC context, containing all its current state. Copying
       contexts for MACs registered using gnutls_crypto_register_mac() is not supported and  will
       always  result  in  an  error. In addition to that, some of the MAC implementations do not
       support this operation. Applications should check the return value and  provide  a  proper
       fallback.

RETURNS

       new MAC context or NULL in case of an error.

SINCE

       3.6.9

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/