Function mbedtls_poly1305_finish

pub unsafe extern "C" fn mbedtls_poly1305_finish(
    ctx: *mut mbedtls_poly1305_context,
    mac: *mut u8,
) -> i32

\brief This function generates the Poly1305 Message Authentication Code (MAC).

\param ctx The Poly1305 context to use for the Poly1305 operation. This must be initialized and bound to a key. \param mac The buffer to where the MAC is written. This must be a writable buffer of length \c 16 Bytes.

\return \c 0 on success. \return A negative error code on failure.