---
name: "gnutls_aead_cipher_set_key"
section: "3"
platform: "linux"
package: "gnutls"
version: "3.8.13-3"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/gnutls_aead_cipher_set_key"
---

# gnutls\_aead\_cipher\_set\_key(3)

API function

## NAME

gnutls\_aead\_cipher\_set\_key - API function

## SYNOPSIS

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

**int gnutls\_aead\_cipher\_set\_key(gnutls\_aead\_cipher\_hd\_t** *handle***, const gnutls\_datum\_t \*** *key***);**

## ARGUMENTS

- gnutls\_aead\_cipher\_hd\_t handle

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

- const gnutls\_datum\_t \* key

  The key to be used for encryption

## DESCRIPTION

This function will set a new key without re-initializing the context.

## RETURNS

Zero or a negative error code on error.

## SINCE

3\.7.5

## REPORTING BUGS

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

## 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

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/