7.11.1 Symmetric cryptography

The available functions to access symmetric crypto algorithms operations are shown below. The supported algorithms are the algorithms required by the TLS protocol. They are listed in tab:ciphers.

gnutls_cipher_init

gnutls_cipher_encrypt2

gnutls_cipher_decrypt2

gnutls_cipher_set_iv

gnutls_cipher_deinit

In order to support authenticated encryption with associated data (AEAD) algorithms the following functions are provided to set the associated data and retrieve the authentication tag.

gnutls_cipher_add_auth

gnutls_cipher_tag