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 © 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/share/doc/gnutls/ directory does not contain the HTML form visit

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