js加密解密字符串可自定义密码因子

解密 the message."); return; } var prand = ""; for(var i=0; i<pwd.length; i++) { prand += pwd.charCodeAt(i).toString(); } var sPos = Math.floor(prand.length / 5); var mult = parseInt(prand.charAt(sPos) + prand.charAt(sPos*2) + prand.charAt(sPos*3) + prand.charAt(sPos*4) + prand.charAt(sPos*5)); var incr = Math.ceil(pwd.length / 2); var modu = Math.pow(2, 31) - 1; if(mult < 2) { alert("Algorithm cannot find a suitable hash. Please choose a different password. \nPossible considerations are to choose a more complex or longer password."); return; } var saltStr = str.substring(str.length - 8); var salt = parseInt(saltStr, 16); prand += saltStr; while(prand.length > 10) { prand = (parseInt(prand.substring(0, 10)) + parseInt(prand.substring(10, prand.length))).toString(); } prand = (mult * prand + incr) % modu; var dec_str = ""; for(var i=0; i