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  • js 加密方法Encrypt

    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;
        }

    调用:Encrypt(name, " ")

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  • 原文地址:https://www.cnblogs.com/wjm956/p/8266845.html
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