前两天看见有人问静态网页加密问题，就写了这个代码
稍微有些长，解释一下思路：
加密时：先把用户的密钥A用md5加密为B,然后用B异或源文件S0得到目标文件S1，把S1存入js变量中。
解密时：询问密钥，然后操作同加密。
因为用了md5，个人认为没有密钥的时候是无法破解的（暴力除外）
大家试用一下：
运行代码框
<html>
<head>
<title>Web Encoder</title>
<style>
body {
font-size:12px;
line-height:12px;
background-Color:buttonface;
border-width:0px;
overflow:auto;
margin:0px;
padding:4px;
}
#t1, #t2 {
width:100%;
height:40%;
border-width:1px;
overflow:auto;
height:expression((document.body.clientHeight-100)/2);
}
input {
border-width:1px;
padding-left:10px;
padding-right:10px;
margin:4px;
}
</style>
<script>
function webEncode(){
strSource=escape(XOR(t1.value,STR.md5(p1.value)));
//strSource=t1.value;
strOut="<script>\r\nstrHTML=\"\";\r\n";
for(var i=0;i+70<strSource.length;i+=70){
strOut+="strHTML+=\""+addSlash(strSource.substring(i,i+70))+"\";\r\n";
}
strOut+="strHTML+=\""+addSlash(strSource.substring(i,strSource.length))+"\";\r\n";
strOut+=XOR+"\r\n";
//below code load the STR object
strOut+="var STR =\r\n{\r\n\thexcase : 0, \/* hex output format. 0 - lowercase; 1 - ";
strOut+="uppercase *\/\r\n\tb64pad : \"\", \/* base-64 pad character. \"=\" for ";
strOut+="strict RFC compliance *\/\r\n\tchrsz : 8, \/* bits per input character";
strOut+=". 8 - ASCII; 16 - Unicode *\/\r\n\t\r\n\tb64_hmac_md5:\r\n\t\tfunction(key, ";
strOut+="data) { return binl2b64(core_hmac_md5(key, data)); },\r\n\t\t\r\n\tb64_md5:\r\n";
strOut+="\t\tfunction(s){ return binl2b64(core_md5(str2binl(s), s.length * this.c";
strOut+="hrsz));},\r\n\t\t\r\n\tbinl2b64:\r\n\t\tfunction(binarray){\r\n\t\t var tab = \"ABCDE";
strOut+="FGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+\/\";\r\n\t\t var";
strOut+=" str = \"\";\r\n\t\t for(var i = 0; i < binarray.length * 4; i += 3)\r\n\t\t {";
strOut+="\r\n\t\t var triplet = (((binarray[i >> 2] >> 8 * ( i %4)) & 0xFF) ";
strOut+="<< 16)\r\n\t\t | (((binarray[i+1 >> 2] >> 8 * ((i+1)%4)) & ";
strOut+="0xFF) << 8 )\r\n\t\t | ((binarray[i+2 >> 2] >> 8 * ((i+2)%";
strOut+="4)) & 0xFF);\r\n\t\t for(var j = 0; j < 4; j++)\r\n\t\t {\r\n\t\t if(i ";
strOut+="* 8 + j * 6 > binarray.length * 32) str += this.b64pad;\r\n\t\t else ";
strOut+="str += tab.charAt((triplet >> 6*(3-j)) & 0x3F);\r\n\t\t }\r\n\t\t }\r\n\t\t r";
strOut+="eturn str;\r\n\t\t},\r\n\t\t\r\n\tbinl2hex:\r\n\t\tfunction(binarray){\r\n\t\t var hex_t";
strOut+="ab = this.hexcase ? \"0123456789ABCDEF\" : \"0123456789abcdef\";\r\n\t\t var ";
strOut+="str = \"\";\r\n\t\t for(var i = 0; i < binarray.length * 4; i++)\r\n\t\t {\r\n\t\t";
strOut+=" str += hex_tab.charAt((binarray[i>>2] >> ((i%4)*8+4)) & 0xF) +\r\n\t\t";
strOut+=" hex_tab.charAt((binarray[i>>2] >> ((i%4)*8 )) & 0xF);\r\n\t\t ";
strOut+=" }\r\n\t\t return str;\r\n\t\t},\r\n\t\r\n\tbinl2str:\r\n\t\tfunction(bin){\r\n\t\t var st";
strOut+="r = \"\";\r\n\t\t var mask = (1 << this.chrsz) - 1;\r\n\t\t for(var i = 0; i <";
strOut+=" bin.length * 32; i += this.chrsz)\r\n\t\t str += String.fromCharCode((";
strOut+="bin[i>>5] >>> (i % 32)) & mask);\r\n\t\t return str;\r\n\t\t},\r\n\t\t\r\n\tbit_rol:";
strOut+="\r\n\t\tfunction(num, cnt){return (num << cnt) | (num >>> (32 - cnt));},\r\n";
strOut+="\t\t\r\n\tcore_hmac_md5:\r\n\t\tfunction(key, data){\r\n\t\t var bkey = str2binl(k";
strOut+="ey);\r\n\t\t if(bkey.length > 16) bkey = core_md5(bkey, key.length * this";
strOut+=".chrsz);\r\n\t\t\r\n\t\t var ipad = Array(16), opad = Array(16);\r\n\t\t for(var";
strOut+=" i = 0; i < 16; i++)\r\n\t\t {\r\n\t\t ipad[i] = bkey[i] ^ 0x36363636;\r\n\t\t";
strOut+=" opad[i] = bkey[i] ^ 0x5C5C5C5C;\r\n\t\t }\r\n\t\t\r\n\t\t var hash = core_md";
strOut+="5(ipad.concat(str2binl(data)), 512 + data.length * this.chrsz);\r\n\t\t r";
strOut+="eturn core_md5(opad.concat(hash), 512 + 128);\r\n\t\t},\r\n\t\t\r\n\tcore_md5:\r\n\t";
strOut+="\tfunction(x, len){\r\n\t\t \/* append padding *\/\r\n\t\t x[len >> 5] |= 0x80 ";
strOut+="<< ((len) % 32);\r\n\t\t x[(((len + 64) >>> 9) << 4) + 14] = len;\r\n\t\t\r\n\t\t";
strOut+=" var a = 1732584193;\r\n\t\t var b = -271733879;\r\n\t\t var c = -17325841";
strOut+="94;\r\n\t\t var d = 271733878;\r\n\t\t\r\n\t\t for(var i = 0; i < x.length; i +";
strOut+="= 16)\r\n\t\t {\r\n\t\t var olda = a;\r\n\t\t var oldb = b;\r\n\t\t var oldc";
strOut+=" = c;\r\n\t\t var oldd = d;\r\n\t\t\r\n\t\t a = this.md5_ff(a, b, c, d, x[i+";
strOut+=" 0], 7 , -680876936);\r\n\t\t d = this.md5_ff(d, a, b, c, x[i+ 1], 12, ";
strOut+="-389564586);\r\n\t\t c = this.md5_ff(c, d, a, b, x[i+ 2], 17, 60610581";
strOut+="9);\r\n\t\t b = this.md5_ff(b, c, d, a, x[i+ 3], 22, -1044525330);\r\n\t\t ";
strOut+=" a = this.md5_ff(a, b, c, d, x[i+ 4], 7 , -176418897);\r\n\t\t d = th";
strOut+="is.md5_ff(d, a, b, c, x[i+ 5], 12, 1200080426);\r\n\t\t c = this.md5_f";
strOut+="f(c, d, a, b, x[i+ 6], 17, -1473231341);\r\n\t\t b = this.md5_ff(b, c, ";
strOut+="d, a, x[i+ 7], 22, -45705983);\r\n\t\t a = this.md5_ff(a, b, c, d, x[i+";
strOut+=" 8], 7 , 1770035416);\r\n\t\t d = this.md5_ff(d, a, b, c, x[i+ 9], 12,";
strOut+=" -1958414417);\r\n\t\t c = this.md5_ff(c, d, a, b, x[i+10], 17, -42063)";
strOut+=";\r\n\t\t b = this.md5_ff(b, c, d, a, x[i+11], 22, -1990404162);\r\n\t\t ";
strOut+=" a = this.md5_ff(a, b, c, d, x[i+12], 7 , 1804603682);\r\n\t\t d = thi";
strOut+="s.md5_ff(d, a, b, c, x[i+13], 12, -40341101);\r\n\t\t c = this.md5_ff(c";
strOut+=", d, a, b, x[i+14], 17, -1502002290);\r\n\t\t b = this.md5_ff(b, c, d, ";
strOut+="a, x[i+15], 22, 1236535329);\r\n\t\t\r\n\t\t a = this.md5_gg(a, b, c, d, x";
strOut+="[i+ 1], 5 , -165796510);\r\n\t\t d = this.md5_gg(d, a, b, c, x[i+ 6], 9";
strOut+=" , -1069501632);\r\n\t\t c = this.md5_gg(c, d, a, b, x[i+11], 14, 6437";
strOut+="17713);\r\n\t\t b = this.md5_gg(b, c, d, a, x[i+ 0], 20, -373897302);\r\n";
strOut+="\t\t a = this.md5_gg(a, b, c, d, x[i+ 5], 5 , -701558691);\r\n\t\t d =";
strOut+=" this.md5_gg(d, a, b, c, x[i+10], 9 , 38016083);\r\n\t\t c = this.md5_";
strOut+="gg(c, d, a, b, x[i+15], 14, -660478335);\r\n\t\t b = this.md5_gg(b, c, ";
strOut+="d, a, x[i+ 4], 20, -405537848);\r\n\t\t a = this.md5_gg(a, b, c, d, x[i";
strOut+="+ 9], 5 , 568446438);\r\n\t\t d = this.md5_gg(d, a, b, c, x[i+14], 9 ,";
strOut+=" -1019803690);\r\n\t\t c = this.md5_gg(c, d, a, b, x[i+ 3], 14, -187363";
strOut+="961);\r\n\t\t b = this.md5_gg(b, c, d, a, x[i+ 8], 20, 1163531501);\r\n\t";
strOut+="\t a = this.md5_gg(a, b, c, d, x[i+13], 5 , -1444681467);\r\n\t\t d =";
strOut+=" this.md5_gg(d, a, b, c, x[i+ 2], 9 , -51403784);\r\n\t\t c = this.md5_";
strOut+="gg(c, d, a, b, x[i+ 7], 14, 1735328473);\r\n\t\t b = this.md5_gg(b, c,";
strOut+=" d, a, x[i+12], 20, -1926607734);\r\n\t\t\r\n\t\t a = this.md5_hh(a, b, c, ";
strOut+="d, x[i+ 5], 4 , -378558);\r\n\t\t d = this.md5_hh(d, a, b, c, x[i+ 8], ";
strOut+="11, -2022574463);\r\n\t\t c = this.md5_hh(c, d, a, b, x[i+11], 16, 183";
strOut+="9030562);\r\n\t\t b = this.md5_hh(b, c, d, a, x[i+14], 23, -35309556);\r";
strOut+="\n\t\t a = this.md5_hh(a, b, c, d, x[i+ 1], 4 , -1530992060);\r\n\t\t d";
strOut+=" = this.md5_hh(d, a, b, c, x[i+ 4], 11, 1272893353);\r\n\t\t c = this.";
strOut+="md5_hh(c, d, a, b, x[i+ 7], 16, -155497632);\r\n\t\t b = this.md5_hh(b,";
strOut+=" c, d, a, x[i+10], 23, -1094730640);\r\n\t\t a = this.md5_hh(a, b, c, d";
strOut+=", x[i+13], 4 , 681279174);\r\n\t\t d = this.md5_hh(d, a, b, c, x[i+ 0]";
strOut+=", 11, -358537222);\r\n\t\t c = this.md5_hh(c, d, a, b, x[i+ 3], 16, -72";
strOut+="2521979);\r\n\t\t b = this.md5_hh(b, c, d, a, x[i+ 6], 23, 76029189);\r";
strOut+="\n\t\t a = this.md5_hh(a, b, c, d, x[i+ 9], 4 , -640364487);\r\n\t\t d ";
strOut+="= this.md5_hh(d, a, b, c, x[i+12], 11, -421815835);\r\n\t\t c = this.md";
strOut+="5_hh(c, d, a, b, x[i+15], 16, 530742520);\r\n\t\t b = this.md5_hh(b, c";
strOut+=", d, a, x[i+ 2], 23, -995338651);\r\n\t\t\r\n\t\t a = this.md5_ii(a, b, c, ";
strOut+="d, x[i+ 0], 6 , -198630844);\r\n\t\t d = this.md5_ii(d, a, b, c, x[i+ 7";
strOut+="], 10, 1126891415);\r\n\t\t c = this.md5_ii(c, d, a, b, x[i+14], 15, -";
strOut+="1416354905);\r\n\t\t b = this.md5_ii(b, c, d, a, x[i+ 5], 21, -57434055";
strOut+=");\r\n\t\t a = this.md5_ii(a, b, c, d, x[i+12], 6 , 1700485571);\r\n\t\t ";
strOut+=" d = this.md5_ii(d, a, b, c, x[i+ 3], 10, -1894986606);\r\n\t\t c = th";
strOut+="is.md5_ii(c, d, a, b, x[i+10], 15, -1051523);\r\n\t\t b = this.md5_ii(b";
strOut+=", c, d, a, x[i+ 1], 21, -2054922799);\r\n\t\t a = this.md5_ii(a, b, c, ";
strOut+="d, x[i+ 8], 6 , 1873313359);\r\n\t\t d = this.md5_ii(d, a, b, c, x[i+1";
strOut+="5], 10, -30611744);\r\n\t\t c = this.md5_ii(c, d, a, b, x[i+ 6], 15, -1";
strOut+="560198380);\r\n\t\t b = this.md5_ii(b, c, d, a, x[i+13], 21, 130915164";
strOut+="9);\r\n\t\t a = this.md5_ii(a, b, c, d, x[i+ 4], 6 , -145523070);\r\n\t\t ";
strOut+=" d = this.md5_ii(d, a, b, c, x[i+11], 10, -1120210379);\r\n\t\t
