@deftypefun {gnutls_hash_hd_t} {gnutls_hash_copy} (gnutls_hash_hd_t @var{handle})
@var{handle}: is a @code{gnutls_hash_hd_t}  type

This function will create a copy of Message Digest context, containing all
its current state. Copying contexts for Message Digests registered using
@code{gnutls_crypto_register_digest()}  is not supported and will always result in
an error.

@strong{Returns:} new Message Digest context or NULL in case of an error.

@strong{Since:} 3.6.9
@end deftypefun