调用:Encrypt(name," ")
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return function Encrypt(str, pwd) {
if (str == "") return "";
str = escape(str);
if (!pwd || pwd == "") {
var pwd = "1234";
}
pwd = escape(pwd);
if (pwd == null || pwd.length <= 0) {
alert("Please enter a password with which to encrypt the message.");
return null;
}
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. /n Possible considerations are to choose a more complex or longer password.");
return null;
}
var salt = Math.round(Math.random() * 1000000000) % 100000000;
prand += salt;
while (prand.length > 10) {
prand = (parseInt(prand.substring(0, 10)) + parseInt(prand.substring(10, prand.length))).toString();
}
prand = (mult * prand + incr) % modu;
var enc_chr = "";
var enc_str = "";
for (var I = 0; I < str.length; I++) {
enc_chr = parseInt(str.charCodeAt(I) ^ Math.floor((prand / modu) * 255));
if (enc_chr < 16) {
enc_str += "0" + enc_chr.toString(16);
} else enc_str += enc_chr.toString(16);
prand = (mult * prand + incr) % modu;
}
salt = salt.toString(16);
while (salt.length < 8) salt = "0" + salt;
enc_str += salt;
return enc_str;
}
js 加密方法 Encrypt
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