gnutls\_cipher\_tag(3) gnutls gnutls\_cipher\_tag(3)

# [NAME](#NAME)

gnutls\_cipher\_tag - API function

# [SYNOPSIS](#SYNOPSIS)

**#include <gnutls/crypto.h>**

**int gnutls\_cipher\_tag(gnutls\_cipher\_hd\_t handle, void * tag, size\_t tag\_size);**

# [ARGUMENTS](#ARGUMENTS)

[gnutls\_cipher\_hd\_t handle](#gnutls_cipher_hd_t)

is a **gnutls\_cipher\_hd\_t** type

[void * tag](#void)

will hold the tag

[size\_t tag\_size](#size_t)

the length of the tag to return

# [DESCRIPTION](#DESCRIPTION)

This function operates on authenticated encryption with associated data (AEAD) ciphers and will return the output tag.

# [RETURNS](#RETURNS)

Zero or a negative error code on error.

# [SINCE](#SINCE)

3.0

# [REPORTING BUGS](#REPORTING_BUGS)

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

# [COPYRIGHT](#COPYRIGHT)

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](#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/](https://www.gnutls.org/manual/)

3.8.13 gnutls

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Document: gnutls_cipher_tag(3) from gnutls 3.8.13-r3 (Chainguard OS)
Source: https://gitlab.com/gnutls/gnutls