dcp::ArrayData random_iv ();
dcp::ArrayData encrypt (std::string plaintext, dcp::ArrayData key, dcp::ArrayData iv);
std::string decrypt (dcp::ArrayData ciphertext, dcp::ArrayData key, dcp::ArrayData iv);
int crypto_key_length ();
dcp::ArrayData random_iv ();
dcp::ArrayData encrypt (std::string plaintext, dcp::ArrayData key, dcp::ArrayData iv);
std::string decrypt (dcp::ArrayData ciphertext, dcp::ArrayData key, dcp::ArrayData iv);
int crypto_key_length ();