SYNOPSIS
#include <gnutls/crypto.h>int gnutls_hmac_init(gnutls_hmac_hd_t * dig, gnutls_mac_algorithm_t algorithm, const void * key, size_t keylen);
ARGUMENTS
- gnutls_hmac_hd_t * dig
- is a gnutls_hmac_hd_t type
- gnutls_mac_algorithm_t algorithm
- the HMAC algorithm to use
- const void * key
- the key to be used for encryption
- size_t keylen
- the length of the key
DESCRIPTION
This function will initialize an context that can be used to produce a Message Authentication Code (MAC) of data. This will effectively use the current crypto backend in use by gnutls or the cryptographic accelerator in use.Note that despite the name of this function, it can be used for other MAC algorithms than HMAC.
RETURNS
Zero or a negative error code on error.SINCE
2.10.0COPYRIGHT
Copyright © 2001-2016 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.