pub unsafe extern "C" fn themis_secure_message_unwrap(
private_key: *const u8,
private_key_length: usize,
public_key: *const u8,
public_key_length: usize,
wrapped_message: *const u8,
wrapped_message_length: usize,
message: *mut u8,
message_length: *mut usize,
) -> themis_status_t