import * as crypto from "node:crypto"; const charset = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"; export function secureRndstr(length = 32) { let str = ""; for(let i = 0; i < length; i++){ let rand = Math.floor(crypto.randomBytes(1).readUInt8(0) / 0xff * charset.length); if (rand === charset.length) { rand = charset.length - 1; } str += charset.charAt(rand); } return str; }