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gnutls_hmac_init(3)                 gnutls                 gnutls_hmac_init(3)

NAME
       gnutls_hmac_init - API function

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
       2.10.0

REPORTING BUGS
       Report bugs to <bugs@gnutls.org>.
       Home page: https://www.gnutls.org

COPYRIGHT
       Copyright (C) 2001- 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/local/share/doc/gnutls/ directory does not contain the HTML
       form visit

       https://www.gnutls.org/manual/

gnutls                               3.7.9                 gnutls_hmac_init(3)