class RbNaCl::AEAD::XChaCha20Poly1305IETF

Authenticated Encryption with Additional Data using ChaCha20-Poly1305
This class contains wrappers for the IETF implementation of

def do_decrypt(message, message_len, nonce, ciphertext, additional_data) 

def do_decrypt(message, message_len, nonce, ciphertext, additional_data)
  self.class.aead_xchacha20poly1305_ietf_decrypt(message, message_len, nil,
                                                 ciphertext, data_len(ciphertext),
                                                 additional_data, data_len(additional_data),
                                                 nonce, @key)
end

def do_encrypt(ciphertext, ciphertext_len, nonce, message, additional_data) 

def do_encrypt(ciphertext, ciphertext_len, nonce, message, additional_data)
  self.class.aead_xchacha20poly1305_ietf_encrypt(ciphertext, ciphertext_len,
                                                 message, data_len(message),
                                                 additional_data, data_len(additional_data),
                                                 nil, nonce, @key)
end