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 Table 3.1.

• 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

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