| use crate::callback::CallbackSubscription; |
| use crate::callback::Consumer; |
| use crate::result::TockResult; |
| use crate::syscalls; |
| use core::marker::PhantomData; |
| use libtock_core::shared_memory::SharedMemory; |
| |
| const DRIVER_NUMBER: usize = 0x40003; |
| |
| pub const KEY_BUFFER_SIZE: usize = 32; |
| pub const DATA_BUFFER_SIZE: usize = 256; |
| pub const DEST_BUFFER_SIZE: usize = 32; |
| |
| mod command_nr { |
| pub const SET_ALGORITHM: usize = 0; |
| pub const RUN: usize = 1; |
| } |
| |
| mod subscribe_nr { |
| pub const SUBSCRIBE_CALLBACK: usize = 0; |
| } |
| |
| mod allow_nr { |
| pub const KEY: usize = 0; |
| pub const DATA: usize = 1; |
| pub const DEST: usize = 2; |
| } |
| |
| #[non_exhaustive] |
| pub struct HmacDriverFactory; |
| |
| impl HmacDriverFactory { |
| pub fn init_driver(&mut self) -> TockResult<HmacDriver> { |
| let hmac = HmacDriver { |
| lifetime: PhantomData, |
| }; |
| Ok(hmac) |
| } |
| } |
| |
| struct HmacEventConsumer; |
| |
| impl<CB: FnMut(usize, usize)> Consumer<CB> for HmacEventConsumer { |
| fn consume(callback: &mut CB, result: usize, digest: usize, _: usize) { |
| callback(result, digest); |
| } |
| } |
| |
| pub struct HmacKeyBuffer { |
| buffer: [u8; KEY_BUFFER_SIZE], |
| } |
| |
| impl Default for HmacKeyBuffer { |
| fn default() -> Self { |
| HmacKeyBuffer { |
| buffer: [0; KEY_BUFFER_SIZE], |
| } |
| } |
| } |
| |
| pub struct HmacDataBuffer { |
| pub buffer: [u8; DATA_BUFFER_SIZE], |
| } |
| |
| impl Default for HmacDataBuffer { |
| fn default() -> Self { |
| HmacDataBuffer { |
| buffer: [0; DATA_BUFFER_SIZE], |
| } |
| } |
| } |
| |
| pub struct HmacDestBuffer { |
| buffer: [u8; DEST_BUFFER_SIZE], |
| } |
| |
| impl Default for HmacDestBuffer { |
| fn default() -> Self { |
| HmacDestBuffer { |
| buffer: [0; DEST_BUFFER_SIZE], |
| } |
| } |
| } |
| |
| pub struct HmacDriver<'a> { |
| lifetime: PhantomData<&'a ()>, |
| } |
| |
| impl<'a> HmacDriver<'a> { |
| pub fn init_key_buffer(&self, buffer: &'a mut HmacKeyBuffer) -> TockResult<SharedMemory> { |
| syscalls::allow(DRIVER_NUMBER, allow_nr::KEY, &mut buffer.buffer).map_err(Into::into) |
| } |
| |
| pub fn init_data_buffer(&self, buffer: &'a mut HmacDataBuffer) -> TockResult<SharedMemory> { |
| syscalls::allow(DRIVER_NUMBER, allow_nr::DATA, &mut buffer.buffer).map_err(Into::into) |
| } |
| |
| pub fn init_dest_buffer(&self, buffer: &'a mut HmacDestBuffer) -> TockResult<SharedMemory> { |
| syscalls::allow(DRIVER_NUMBER, allow_nr::DEST, &mut buffer.buffer).map_err(Into::into) |
| } |
| |
| pub fn subscribe<CB: FnMut(usize, usize)>( |
| &self, |
| callback: &'a mut CB, |
| ) -> TockResult<CallbackSubscription> { |
| syscalls::subscribe::<HmacEventConsumer, _>( |
| DRIVER_NUMBER, |
| subscribe_nr::SUBSCRIBE_CALLBACK, |
| callback, |
| ) |
| .map_err(Into::into) |
| } |
| |
| pub fn set_algorithm(&self, hash: usize) -> TockResult<()> { |
| syscalls::command(DRIVER_NUMBER, command_nr::SET_ALGORITHM, hash, 0)?; |
| Ok(()) |
| } |
| |
| pub fn run(&self) -> TockResult<()> { |
| syscalls::command(DRIVER_NUMBER, command_nr::RUN, 0, 0)?; |
| Ok(()) |
| } |
| } |