Alistair Francis | 84bc955 | 2020-03-24 10:54:49 -0700 | [diff] [blame] | 1 | #![no_std] |
| 2 | |
| 3 | use core::fmt::Write; |
| 4 | use libtock::hmac::{HmacDataBuffer, HmacDestBuffer, HmacKeyBuffer}; |
| 5 | use libtock::result::TockResult; |
| 6 | use libtock::syscalls; |
| 7 | |
| 8 | #[libtock::main] |
| 9 | async fn main() -> TockResult<()> { |
| 10 | let mut drivers = libtock::retrieve_drivers()?; |
| 11 | let mut console = drivers.console.create_console(); |
| 12 | writeln!(console, "Starting HMAC example")?; |
| 13 | let hmac_driver = drivers.hmac.init_driver()?; |
| 14 | |
| 15 | writeln!(console, "Loading in 0 key")?; |
| 16 | let mut key_buffer = HmacKeyBuffer::default(); |
| 17 | let _key_buffer = hmac_driver.init_key_buffer(&mut key_buffer)?; |
| 18 | writeln!(console, " done")?; |
| 19 | |
| 20 | writeln!(console, "Creating data buffer")?; |
| 21 | let mut data_buffer = HmacDataBuffer::default(); |
| 22 | let data: &[u8; 72] = |
| 23 | b"A language empowering everyone to build reliable and efficient software."; |
| 24 | |
| 25 | for (i, d) in data.iter().enumerate() { |
| 26 | data_buffer.buffer[i] = *d; |
| 27 | } |
| 28 | let _data_buffer = hmac_driver.init_data_buffer(&mut data_buffer)?; |
| 29 | writeln!(console, " done")?; |
| 30 | |
| 31 | writeln!(console, "Creating dest buffer")?; |
| 32 | let mut dest_buffer = HmacDestBuffer::default(); |
| 33 | let dest_buffer = hmac_driver.init_dest_buffer(&mut dest_buffer)?; |
| 34 | writeln!(console, " done")?; |
| 35 | |
| 36 | let mut temp_buffer = [0; libtock::hmac::DEST_BUFFER_SIZE]; |
| 37 | |
| 38 | writeln!(console, "Setting callback and running")?; |
| 39 | let mut callback = |_result, _digest| { |
| 40 | writeln!(console, "HMAC Complete, printing digest").unwrap(); |
| 41 | dest_buffer.read_bytes(&mut temp_buffer[..]); |
| 42 | |
| 43 | for buf in temp_buffer.iter().take(libtock::hmac::DEST_BUFFER_SIZE) { |
| 44 | write!(console, "{:x}", *buf).unwrap(); |
| 45 | } |
| 46 | }; |
| 47 | |
| 48 | let _subscription = hmac_driver.subscribe(&mut callback)?; |
| 49 | |
| 50 | hmac_driver.run()?; |
| 51 | |
| 52 | loop { |
| 53 | unsafe { syscalls::raw::yieldk() }; |
| 54 | } |
| 55 | } |