@deftypefun {int} {gnutls_hmac} (gnutls_hmac_hd_t @var{handle}, const void * @var{ptext}, size_t @var{ptext_len})

@var{handle}: is a @code{gnutls_hmac_hd_t}  type

@var{ptext}: the data to hash

@var{ptext_len}: the length of data to hash

This function will hash the given data using the algorithm

specified by the context.

@strong{Returns:} Zero or a negative error code on error.

@strong{Since:} 2.10.0

@end deftypefun