crypto2 0.1.2

cryptographic algorithms
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pub fn constant_time_eq(a: &[u8], b: &[u8]) -> bool {
    if a.len() != b.len() {
        return false;
    }

    let mut x = 0u8;
    
    for i in 0..a.len() {
        x |= a[i] ^ b[i];
    }

    x == 0
}