lioness/
util.rs

1
2/// Simple slice xor function modified from:
3/// https://github.com/DaGenix/rust-crypto/blob/master/src/scrypt.rs
4pub fn xor(x: &[u8], y: &[u8], output: &mut [u8]) {
5    assert!( x.len() == y.len() && x.len() == output.len() );
6    for ((out, &x_i), &y_i) in output.iter_mut().zip(x.iter()).zip(y.iter()) {
7        *out = x_i ^ y_i;
8    }
9}
10
11pub fn xor_assign(a: &mut [u8], b: &[u8]) {
12    assert!( a.len() == b.len() );
13    for (a_i, &b_i) in a.iter_mut().zip(b.iter()) {
14        *a_i ^= b_i;
15    }
16}
17
18#[cfg(test)]
19mod tests {
20    use super::*;
21
22    #[test]
23    fn simple_xor_test() {
24        let x = [0x8e, 0xc6, 0xcb, 0x71];
25        let y = [0x2e, 0x51, 0xa9, 0x21];
26        let mut output = [1u8; 4];
27        xor(&x, &y, &mut output);
28        let want = hex::decode("a0976250").unwrap();
29        assert_eq!(output, want.as_slice());
30    }
31
32    #[test]
33    fn simple_xor_assign_test() {
34        let mut x = [0x8e, 0xc6, 0xcb, 0x71];
35        let y = [0x2e, 0x51, 0xa9, 0x21];
36        xor_assign(&mut x, &y);
37        let want = hex::decode("a0976250").unwrap();
38        assert_eq!(x, want.as_slice());
39    }
40}
lioness/util.rs

lioness/
util.rs
