SimplePasswordGenerator created by Carleslc - https://repl.it/@Carleslc/SimplePasswordGenerator

passwordGenerator.lua

function randPW(length, strong)
    local index, pw, rnd = 0, ""
    local chars = {
        "ABCDEFGHIJKLMNPQRSTUVWXYZ", -- O
        "abcdefghijklmnopqrstuvwxyz",
        "123456789" -- 0
    }
    if strong then
        table.insert(chars, "!\\#$%&()*+,-./:;<=>?@[]^_{|}~") -- '"
    end
    repeat
        index = index + 1
        rnd = math.random(chars[index]:len())
        if math.random(2) == 1 then
            pw = pw .. chars[index]:sub(rnd, rnd)
        else
            pw = chars[index]:sub(rnd, rnd) .. pw
        end
        index = index % #chars
    until pw:len() >= length
    return pw
end

function generatePassword(length, strong)
    math.randomseed(os.time())
    return randPW(length, strong)
end

print("SIMPLE: " .. generatePassword(8))
print("STRONG: " .. generatePassword(16, true))