Function hex_digit

nodedb/src/ctl/rotate_ca.rs:123–130

(b: u8)

}

fn hex_digit(b: u8) -> Result<u8, String> {
    match b {
        b'0'..=b'9' => Ok(b - b'0'),
        b'a'..=b'f' => Ok(10 + b - b'a'),
        b'A'..=b'F' => Ok(10 + b - b'A'),
        other => Err(format!("invalid hex char: {:?}", other as char)),
    }
}

fn write_pem(path: &Path, der: &[u8]) -> std::io::Result<()> {
    use base64::Engine;