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gnutls_hmac_init(3) — Linux manual page

gnutls_hmac_init(3)               gnutlsgnutls_hmac_init(3)

NAME        top

       gnutls_hmac_init - API function

SYNOPSIS        top

#include <gnutls/crypto.h>int gnutls_hmac_init(gnutls_hmac_hd_t *dig,gnutls_mac_algorithm_talgorithm, const void *key, size_tkeylen);

ARGUMENTS        top

       gnutls_hmac_hd_t * dig                   is agnutls_hmac_hd_ttype       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        top

       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        top

       Zero or a negative error code on error.

SINCE        top

       2.10.0

REPORTING BUGS        top

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

COPYRIGHT        top

       Copyright © 2001-2023 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        top

       The full documentation forgnutlsis maintained as a Texinfo       manual.  If the /usr/share/doc/gnutls/ directory does not contain       the HTML form visithttps://www.gnutls.org/manual/

COLOPHON        top

       This page is part of theGnuTLS (GnuTLS Transport Layer Security       Library) project.  Information about the project can be found at       ⟨http://www.gnutls.org/⟩.  If you have a bug report for this       manual page, send it to bugs@gnutls.org.  This page was obtained       from the tarball fetched from       ⟨https://www.gnupg.org/ftp/gcrypt/gnutls/⟩ on 2025-08-11.  If you       discover any rendering problems in this HTML version of the page,       or you believe there is a better or more up-to-date source for the       page, or you have corrections or improvements to the information       in this COLOPHON (which isnot part of the original manual page),       send a mail to man-pages@man7.orggnutls                            3.8.10gnutls_hmac_init(3)

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