tc_rc_cipher 0.1.0

RC2, RC5 and RC6 block ciphers for legacy interoperability, with an optional RustCrypto RC2 engine.
Documentation 
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pub fn unhex(value: &str) -> Vec<u8> {
    (0..value.len())
        .step_by(2)
        .map(|index| u8::from_str_radix(&value[index..index + 2], 16).unwrap())
        .collect()
}

// Only the RC5 tests use this; the other test crates compile it too.
#[allow(dead_code)]
pub fn xor(a: &[u8], b: &[u8]) -> Vec<u8> {
    a.iter().zip(b).map(|(left, right)| left ^ right).collect()
}