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 digits: Vec<u8> = vec![
        *["0", "1", "2", "3", "9"][rng.gen_range(0..5)]
            .as_bytes()
            .first()
            .unwrap()
            - b'0',
    ];
    for _ in 0..8 {
        digits.push(rng.gen_range(0..=9));
    }
    let check = crate::personal_id::checksum::luhn_check(&digits);
    digits.push(check);
    digits.iter().map(|d| (b'0' + d) as char).collect()
}

pub fn validate(code: &str) -> bool {
    let clean: String = code.chars().filter(|c| c.is_ascii_digit()).collect();
    if clean.len() != 10 {
        return false;
    }
    if !["0", "1", "2", "3", "9"].contains(&&clean[0..1]) {
        return false;
    }
    let digits: Vec<u8> = clean.bytes().map(|b| b - b'0').collect();
    crate::personal_id::checksum::luhn_check(&digits[..9]) == digits[9]
}