SHA256

sha256.rs

#![no_main]
#![no_std]

use panic_halt as _;

use sha2::{Digest, Sha256};

extern "C" {
    fn assert_eq_i64(actual: u64, expected: u64);
}
// fn assert_eq_i64(actual: u64, expected: u64) {
//     assert_eq!(actual, expected);
// }

fn assert_eq_array(expected: &[u8], actual: &[u8]) {
    for i in 0..32 {
        unsafe {
            assert_eq_i64(expected[i] as u64, actual[i] as u64);
        }
    }
}

#[no_mangle]
pub fn main() {
    let hash = Sha256::digest(b"Hello, world!");
    let expected = [
        49, 95, 91, 219, 118, 208, 120, 196, 59, 138, 192, 6, 78, 74, 1, 100, 97, 43, 31, 206, 119,
        200, 105, 52, 91, 252, 148, 199, 88, 148, 237, 211,
    ];
    assert_eq_array(&expected, &hash)
}