idsmith 0.5.4

Validate and generate checksum-correct IBANs, personal IDs, bank accounts, credit cards, SWIFT/BIC, company IDs, driver's licenses, tax IDs, and passports.
Documentation 
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use rand::Rng;

pub fn generate(rng: &mut rand::rngs::ThreadRng) -> String {
    let mut s = format!("{:07}", rng.gen_range(1..10000000));
    let alphabet = "ABCDEFGHJKLMNPQRSTUVWXYZ"; // simplified, exclusion list handled by random
    s.push(
        alphabet
            .chars()
            .nth(rng.gen_range(0..alphabet.len()))
            .unwrap(),
    );
    s
}

pub fn validate(code: &str) -> bool {
    let clean = code.to_uppercase().replace([' ', '/', '.', '-'], "");
    let clean = format!("{:0>8}", clean);
    if clean.len() != 8 && clean.len() != 13 {
        return false;
    }
    if !clean[..7].chars().all(|c| c.is_ascii_digit()) {
        return false;
    }
    let control = clean.chars().nth(7).unwrap();
    if "IOU".contains(control) || !control.is_ascii_alphabetic() {
        return false;
    }
    if clean.len() == 13 {
        if !"ABCDE".contains(clean.chars().nth(8).unwrap()) {
            return false;
        }
        if !"MCPNE".contains(clean.chars().nth(9).unwrap()) {
            return false;
        }
        if !clean[10..].chars().all(|c| c.is_ascii_digit()) {
            return false;
        }
    }
    true
}