js字符串加密的几种方法

在做web前端的时候免不了要用javascript来处理一些简单操作，其实如果要用好JQuery, Prototype,Dojo 等其中一两个javascript框架并不简单，它提高你的web交互和用户体验，从而能使你的web前端有非一样的感觉，如海阔凭鱼跃。当然，对于javascript我也是半桶水。高手莫怪，在此我仅总结学习一下，以备用到时查录。

今天不说框架的事情，就从最基本的、比较常用的javascript代码入手。

先说简单字符串加密的事情

/*8进制加密*/
function EnEight(){
    var monyer = new Array();var i,s;
    for(i=0;i<txt.value.length;i++)
        monyer+="\\"+txt.value.charCodeAt(i).toString(8); 
    txt.value=monyer;
}
/*8进制解密*/
function DeEight(){
    var monyer = new Array();var i;
    var s=txt.value.split("\\");
    for(i=1;i<s.length;i++)
        monyer+=String.fromCharCode(parseInt(s[i],8));
    txt.value=monyer;
}
View Code 
/*10进制加密*/
function Encrypt(){
    var monyer = new Array();var i,s;
    for(i=0;i<txt.value.length;i++){
        s=txt.value.charCodeAt(i).toString(16); 
        if(Decimal1.checked) monyer+="&#"+txt.value.charCodeAt(i)+";";
        else if (Decimal2.checked) monyer+="&#"+new Array(7-String(s).length).join("0")+txt.value.charCodeAt(i);
        else monyer+=txt.value.charCodeAt(i)+",";
    }txt.value=monyer;
}
/*10进制解密*/
function Decrypt(){
    var monyer = new Array();var i;
    if(Decimal1.checked){
        var s=txt.value.split(";");
        for(i=0;i<s.length;i++){
            s[i]=s[i].replace('&#','');
            monyer+=String.fromCharCode(s[i]);
        }
    }else if(Decimal2.checked){
        var s=txt.value.split("&");
        for(i=1;i<s.length;i++){
            s[i]=s[i].replace('#','');
            monyer+=String.fromCharCode(s[i]);
        }
    }else{
        var s=txt.value.split(",");
        for(i=0;i<s.length;i++)
            monyer+=String.fromCharCode(s[i]);
    }txt.value=monyer;
} 
View Code 
/*16进制加密*/
function JavaEn(){
    var monyer = new Array();var i,s;
    for(i=0;i<txt.value.length;i++){
        s=txt.value.charCodeAt(i).toString(16); 
        if(hex1.checked) monyer+="\\u"+new Array(5-String(s).length).join("0")+s;
        else if(hex2.checked) monyer+="&#x"+new Array(5-String(s).length).join("0")+s+";";
        else if(hex3.checked) monyer+="\\x"+new Array(5-String(s).length).join("0")+s;
        else monyer+="\\"+new Array(5-String(s).length).join("0")+s;
    }txt.value=monyer;
}
var p=document.documentElement.outerHTML.length;
/*16进制解密*/
function JavaDe(){
    if(hex1.checked){
        var monyer = new Array();var i;
        var s=txt.value.split("\\");
        for(i=1;i<s.length;i++){
            s[i]=s[i].replace('u','');
            monyer+=String.fromCharCode(parseInt(s[i],16));
        }
    }else if(hex2.checked){
        var monyer = new Array();var i;
        var s=txt.value.split(";");
        for(i=0;i<s.length;i++){
            s[i]=s[i].replace('&#x','');
            monyer+=String.fromCharCode(parseInt(s[i],16));
        }
    }
    else if(hex3.checked){
        var monyer = new Array();var i;
        var s=txt.value.split("\\");
        for(i=1;i<s.length;i++){
            s[i]=s[i].replace('x','');
            monyer+=String.fromCharCode(parseInt(s[i],16));
        }
    }else{
        var monyer = new Array();var i;
        var s=txt.value.split("\\");
        for(i=1;i<s.length;i++)
            monyer+=String.fromCharCode(parseInt(s[i],16));
    }txt.value=monyer;
}
/*任意进制加密*/
function EnChTo(h){
    var monyer = new Array();var i,s;
    for(i=0;i<txt.value.length;i++)
        monyer+=txt.value.charCodeAt(i).toString(h)+" "; 
    txt.value=monyer;
}
/*任意进制解密*/
function DeChTo(h){
    var monyer = new Array();var i;
    var s=txt.value.split(" ");
    for(i=0;i<s.length;i++)
        monyer+=String.fromCharCode(parseInt(s[i],h));
    txt.value=monyer;
}

 

加密类似URL的字符

 

function URLEncode(plaintext )
{
var SAFECHARS = "0123456789" + // Numeric
"ABCDEFGHIJKLMNOPQRSTUVWXYZ" + // Alphabetic
"abcdefghijklmnopqrstuvwxyz" +
"-_.!~*'()"; // RFC2396 Mark characters
var HEX = "0123456789ABCDEF";
var encoded = "";
for (var i = 0; i < plaintext.length; i++ ) {
var ch = plaintext.charAt(i);
if (ch == " ") {
encoded += "+"; // x-www-urlencoded, rather than %20
} else if (SAFECHARS.indexOf(ch) != -1) {
encoded += ch;
} else {
var charCode = ch.charCodeAt(0);
if (charCode > 255) {
encoded += "+";
} else {
encoded += "%";
encoded += HEX.charAt((charCode >> 4) & 0xF);
encoded += HEX.charAt(charCode & 0xF);
}
}
} // for
return encoded;
};

 //html Encode

  function HtmlEncode(i)
                {
                if (i == 1)
                    txt.value
                        = txt.value.replace(/&/g, '&amp;').replace(/\"/g, '&quot;').replace(/</g, '&lt;').replace(/>/g,
                                                                                                                  '&gt;');

                if (i == 2)
                    txt.value
                        = txt.value.replace(/&amp;/g, '&').replace(/&quot;/g, '\"').replace(/&lt;/g,
                                                                                            '<').replace(/&gt;/g, '>')
                }

            var hex_chr = "0123456789abcdef";

            function rhex(num)
                {
                str = "";

                for (j = 0; j <= 3; j++)
                    str += hex_chr.charAt((num >> (j * 8 + 4)) & 0x0F) + hex_chr.charAt((num >> (j * 8)) & 0x0F);

                return str
                }

//base64

 var base64EncodeChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
            var base64DecodeChars = new Array(-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
                                              -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
                                              -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63, 52, 53, 54, 55, 56, 57,
                                              58, 59, 60, 61, -1, -1, -1, -1, -1, -1, -1, 0,  1,  2,  3,  4,  5,  6,
                                              7,  8,  9,  10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24,
                                              25, -1, -1, -1, -1, -1, -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36,
                                              37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1,
                                              -1, -1);

            function base64encode(str)
                {
                var out, i, len;
                var c1, c2, c3;
                len = str.length;
                i = 0;
                out = "";

                while (i < len)
                    {
                    c1 = str.charCodeAt(i++) & 0xff;

                    if (i == len)
                        {
                        out += base64EncodeChars.charAt(c1 >> 2);
                        out += base64EncodeChars.charAt((c1 & 0x3) << 4);
                        out += "==";
                        break
                        }

                    c2 = str.charCodeAt(i++);

                    if (i == len)
                        {
                        out += base64EncodeChars.charAt(c1 >> 2);
                        out += base64EncodeChars.charAt(((c1 & 0x3) << 4) | ((c2 & 0xF0) >> 4));
                        out += base64EncodeChars.charAt((c2 & 0xF) << 2);
                        out += "=";
                        break
                        }

                    c3 = str.charCodeAt(i++);
                    out += base64EncodeChars.charAt(c1 >> 2);
                    out += base64EncodeChars.charAt(((c1 & 0x3) << 4) | ((c2 & 0xF0) >> 4));
                    out += base64EncodeChars.charAt(((c2 & 0xF) << 2) | ((c3 & 0xC0) >> 6));
                    out += base64EncodeChars.charAt(c3 & 0x3F)
                    }

                return out
                }

            function base64decode(str)
                {
                var c1, c2, c3, c4;
                var i, len, out;
                len = str.length;
                i = 0;
                out = "";

                while (i < len)
                    {
                    do
                        {
                        c1 = base64DecodeChars[str.charCodeAt(i++) & 0xff]
                        } while (i < len && c1 == -1);

                    if (c1 == -1)
                        break;

                    do
                        {
                        c2 = base64DecodeChars[str.charCodeAt(i++) & 0xff]
                        } while (i < len && c2 == -1);

                    if (c2 == -1)
                        break;

                    out += String.fromCharCode((c1 << 2) | ((c2 & 0x30) >> 4));

                    do
                        {
                        c3 = str.charCodeAt(i++) & 0xff;

                        if (c3 == 61)
                            return out;

                        c3 = base64DecodeChars[c3]
                        } while (i < len && c3 == -1);

                    if (c3 == -1)
                        break;

                    out += String.fromCharCode(((c2 & 0XF) << 4) | ((c3 & 0x3C) >> 2));

                    do
                        {
                        c4 = str.charCodeAt(i++) & 0xff;

                        if (c4 == 61)
                            return out;

                        c4 = base64DecodeChars[c4]
                        } while (i < len && c4 == -1);

                    if (c4 == -1)
                        break;

                    out += String.fromCharCode(((c3 & 0x03) << 6) | c4)
                    }

                return out
                }

//utf8 <->16

 function utf16to8(str)
                {
                var out, i, len, c;
                out = "";
                len = str.length;

                for (i = 0; i < len; i++)
                    {
                    c = str.charCodeAt(i);

                    if ((c >= 0x0001) && (c <= 0x007F))
                        {
                        out += str.charAt(i)
                        }

                    else if (c > 0x07FF)
                        {
                        out += String.fromCharCode(0xE0 | ((c >> 12) & 0x0F));
                        out += String.fromCharCode(0x80 | ((c >> 6) & 0x3F));
                        out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F))
                        }

                    else
                        {
                        out += String.fromCharCode(0xC0 | ((c >> 6) & 0x1F));
                        out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F))
                        }
                    }

                return out
                }

            function utf8to16(str)
                {
                var out, i, len, c;
                var char2, char3;
                out = "";
                len = str.length;
                i = 0;

                while (i < len)
                    {
                    c = str.charCodeAt(i++);

                    switch (c >> 4)
                        {
                        case 0:
                        case 1:
                        case 2:
                        case 3:
                        case 4:
                        case 5:
                        case 6:
                        case 7:
                            out += str.charAt(i - 1);

                            break;

                        case 12:
                        case 13:
                            char2 = str.charCodeAt(i++);

                            out += String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F));
                            break;

                        case 14:
                            char2 = str.charCodeAt(i++);

                            char3 = str.charCodeAt(i++);
                            out += String.fromCharCode(((c & 0x0F) << 12) | ((char2 & 0x3F) << 6)
                                                           | ((char3 & 0x3F) << 0));
                            break
                        }
                    }

                return out
                }

//MD5

 function str2blks_MD5(str)
                {
                nblk = ((str.length + 8) >> 6) + 1;
                blks = new Array(nblk * 16);

                for (i = 0; i < nblk * 16; i++)
                    blks[i] = 0;

                for (i = 0; i < str.length; i++)
                    blks[i >> 2] |= str.charCodeAt(i) << ((i % 4) * 8);

                blks[i >> 2] |= 0x80 << ((i % 4) * 8);
                blks[nblk * 16 - 2] = str.length * 8;
                return blks
                }

            function add(x, y)
                {
                var lsw = (x & 0xFFFF) + (y & 0xFFFF);
                var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
                return (msw << 16) | (lsw & 0xFFFF)
                }

            function rol(num, cnt)
                {
                return (num << cnt) | (num >>> (32 - cnt))
                }

            function cmn(q, a, b, x, s, t)
                {
                return add(rol(add(add(a, q), add(x, t)), s), b)
                }

            function ff(a, b, c, d, x, s, t)
                {
                return cmn((b & c) | ((~b) & d), a, b, x, s, t)
                }

            function gg(a, b, c, d, x, s, t)
                {
                return cmn((b & d) | (c & (~d)), a, b, x, s, t)
                }

            function hh(a, b, c, d, x, s, t)
                {
                return cmn(b ^ c ^ d, a, b, x, s, t)
                }

            function ii(a, b, c, d, x, s, t)
                {
                return cmn(c ^ (b | (~d)), a, b, x, s, t)
                }

            function calcMD5(str)
                {
                x = str2blks_MD5(str);
                a = 1732584193;
                b = -271733879;
                c = -1732584194;
                d = 271733878;

                for (i = 0; i < x.length; i += 16)
                    {
                    olda = a;
                    oldb = b;
                    oldc = c;
                    oldd = d;
                    a = ff(a, b, c, d, x[i + 0], 7, -680876936);
                    d = ff(d, a, b, c, x[i + 1], 12, -389564586);
                    c = ff(c, d, a, b, x[i + 2], 17, 606105819);
                    b = ff(b, c, d, a, x[i + 3], 22, -1044525330);
                    a = ff(a, b, c, d, x[i + 4], 7, -176418897);
                    d = ff(d, a, b, c, x[i + 5], 12, 1200080426);
                    c = ff(c, d, a, b, x[i + 6], 17, -1473231341);
                    b = ff(b, c, d, a, x[i + 7], 22, -45705983);
                    a = ff(a, b, c, d, x[i + 8], 7, 1770035416);
                    d = ff(d, a, b, c, x[i + 9], 12, -1958414417);
                    c = ff(c, d, a, b, x[i + 10], 17, -42063);
                    b = ff(b, c, d, a, x[i + 11], 22, -1990404162);
                    a = ff(a, b, c, d, x[i + 12], 7, 1804603682);
                    d = ff(d, a, b, c, x[i + 13], 12, -40341101);
                    c = ff(c, d, a, b, x[i + 14], 17, -1502002290);
                    b = ff(b, c, d, a, x[i + 15], 22, 1236535329);
                    a = gg(a, b, c, d, x[i + 1], 5, -165796510);
                    d = gg(d, a, b, c, x[i + 6], 9, -1069501632);
                    c = gg(c, d, a, b, x[i + 11], 14, 643717713);
                    b = gg(b, c, d, a, x[i + 0], 20, -373897302);
                    a = gg(a, b, c, d, x[i + 5], 5, -701558691);
                    d = gg(d, a, b, c, x[i + 10], 9, 38016083);
                    c = gg(c, d, a, b, x[i + 15], 14, -660478335);
                    b = gg(b, c, d, a, x[i + 4], 20, -405537848);
                    a = gg(a, b, c, d, x[i + 9], 5, 568446438);
                    d = gg(d, a, b, c, x[i + 14], 9, -1019803690);
                    c = gg(c, d, a, b, x[i + 3], 14, -187363961);
                    b = gg(b, c, d, a, x[i + 8], 20, 1163531501);
                    a = gg(a, b, c, d, x[i + 13], 5, -1444681467);
                    d = gg(d, a, b, c, x[i + 2], 9, -51403784);
                    c = gg(c, d, a, b, x[i + 7], 14, 1735328473);
                    b = gg(b, c, d, a, x[i + 12], 20, -1926607734);
                    a = hh(a, b, c, d, x[i + 5], 4, -378558);
                    d = hh(d, a, b, c, x[i + 8], 11, -2022574463);
                    c = hh(c, d, a, b, x[i + 11], 16, 1839030562);
                    b = hh(b, c, d, a, x[i + 14], 23, -35309556);
                    a = hh(a, b, c, d, x[i + 1], 4, -1530992060);
                    d = hh(d, a, b, c, x[i + 4], 11, 1272893353);
                    c = hh(c, d, a, b, x[i + 7], 16, -155497632);
                    b = hh(b, c, d, a, x[i + 10], 23, -1094730640);
                    a = hh(a, b, c, d, x[i + 13], 4, 681279174);
                    d = hh(d, a, b, c, x[i + 0], 11, -358537222);
                    c = hh(c, d, a, b, x[i + 3], 16, -722521979);
                    b = hh(b, c, d, a, x[i + 6], 23, 76029189);
                    a = hh(a, b, c, d, x[i + 9], 4, -640364487);
                    d = hh(d, a, b, c, x[i + 12], 11, -421815835);


                    c = hh(c, d, a, b, x[i + 15], 16, 530742520);
                    b = hh(b, c, d, a, x[i + 2], 23, -995338651);
                    a = ii(a, b, c, d, x[i + 0], 6, -198630844);
                    d = ii(d, a, b, c, x[i + 7], 10, 1126891415);
                    c = ii(c, d, a, b, x[i + 14], 15, -1416354905);
                    b = ii(b, c, d, a, x[i + 5], 21, -57434055);
                    a = ii(a, b, c, d, x[i + 12], 6, 1700485571);
                    d = ii(d, a, b, c, x[i + 3], 10, -1894986606);
                    c = ii(c, d, a, b, x[i + 10], 15, -1051523);
                    b = ii(b, c, d, a, x[i + 1], 21, -2054922799);
                    a = ii(a, b, c, d, x[i + 8], 6, 1873313359);
                    d = ii(d, a, b, c, x[i + 15], 10, -30611744);
                    c = ii(c, d, a, b, x[i + 6], 15, -1560198380);
                    b = ii(b, c, d, a, x[i + 13], 21, 1309151649);
                    a = ii(a, b, c, d, x[i + 4], 6, -145523070);
                    d = ii(d, a, b, c, x[i + 11], 10, -1120210379);
                    c = ii(c, d, a, b, x[i + 2], 15, 718787259);
                    b = ii(b, c, d, a, x[i + 9], 21, -343485551);
                    a = add(a, olda);
                    b = add(b, oldb);
                    c = add(c, oldc);
                    d = add(d, oldd)
                    }

                return rhex(a) + rhex(b) + rhex(c) + rhex(d)
                }