Javascript写的DES算法,目前只能使用8位的密钥.
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<!--
var DES = {
// initial permutation IP
IP_Table : [
58, 50, 42, 34, 26, 18, 10, 2, 60, 52, 44, 36, 28, 20, 12, 4,
62, 54, 46, 38, 30, 22, 14, 6, 64, 56, 48, 40, 32, 24, 16, 8,
57, 49, 41, 33, 25, 17, 9, 1, 59, 51, 43, 35, 27, 19, 11, 3,
61, 53, 45, 37, 29, 21, 13, 5, 63, 55, 47, 39, 31, 23, 15, 7
],
// final permutation IP^-1
IPR_Table : [
40, 8, 48, 16, 56, 24, 64, 32, 39, 7, 47, 15, 55, 23, 63, 31,
38, 6, 46, 14, 54, 22, 62, 30, 37, 5, 45, 13, 53, 21, 61, 29,
36, 4, 44, 12, 52, 20, 60, 28, 35, 3, 43, 11, 51, 19, 59, 27,
34, 2, 42, 10, 50, 18, 58, 26, 33, 1, 41, 9, 49, 17, 57, 25
],
// permuted choice table (key)
PC1_Table : [
57, 49, 41, 33, 25, 17, 9, 1, 58, 50, 42, 34, 26, 18,
10, 2, 59, 51, 43, 35, 27, 19, 11, 3, 60, 52, 44, 36,
63, 55, 47, 39, 31, 23, 15, 7, 62, 54, 46, 38, 30, 22,
14, 6, 61, 53, 45, 37, 29, 21, 13, 5, 28, 20, 12, 4
],
// permuted choice key (table)
PC2_Table : [
14, 17, 11, 24, 1, 5, 3, 28, 15, 6, 21, 10,
23, 19, 12, 4, 26, 8, 16, 7, 27, 20, 13, 2,
41, 52, 31, 37, 47, 55, 30, 40, 51, 45, 33, 48,
44, 49, 39, 56, 34, 53, 46, 42, 50, 36, 29, 32
],
// number left rotations of pc1
LOOP_Table : [1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1],
// expansion operation matrix
E_Table : [
32, 1, 2, 3, 4, 5, 4, 5, 6, 7, 8, 9,
8, 9, 10, 11, 12, 13, 12, 13, 14, 15, 16, 17,
16, 17, 18, 19, 20, 21, 20, 21, 22, 23, 24, 25,
24, 25, 26, 27, 28, 29, 28, 29, 30, 31, 32, 1
],
// 32-bit permutation function P used on the output of the S-boxes
P_Table : [ 16, 7, 20, 21, 29, 12, 28, 17, 1, 15, 23, 26, 5, 18, 31, 10,
2, 8, 24, 14, 32, 27, 3, 9, 19, 13, 30, 6, 22, 11, 4, 25 ],
// The (in)famous S-boxes
S_Box : [
// S1
[[14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7],
[ 0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8],
[ 4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0],
[15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13]],
// S2
[[15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10],
[ 3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5],
[ 0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15],
[13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9]],
// S3
[[10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8],
[13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1],
[13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7],
[ 1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12]],
// S4
[[ 7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15],
[13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9],
[10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4],
[ 3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14]],
// S5
[[ 2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9],
[14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6],
[ 4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14],
[11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3]],
// S6
[[12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11],
[10, 15, 4, 2, 7, 12, 9, 5, 6, 1, 13, 14, 0, 11, 3, 8],
[ 9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10, 1, 13, 11, 6],
[ 4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13]],
// S7
[[ 4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1],
[13, 0, 11, 7, 4, 9, 1, 10, 14, 3, 5, 12, 2, 15, 8, 6],
[ 1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8, 0, 5, 9, 2],
[ 6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12]],
// S8
[[13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7],
[ 1, 15, 13, 8, 10, 3, 7, 4, 12, 5, 6, 11, 0, 14, 9, 2],
[ 7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13, 15, 3, 5, 8],
[ 2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11]]
],
Oct2Bin : ["0000","0001","0010","0011","0100","0101","0110","0111",
"1000","1001","1010","1011","1100","1101","1110","1111" ],
//str 为八位的字符
subKeys : new Array(16),
key : "",
text : ""
};
DES.init = function(key,text){
if(key != this.key){
this.key=key;
this.GenSubKey();
}
this.text= text + " ".substring(0,parseInt("07654321".charAt( text.length%8 ),10));
};
DES.GenSubKey = function(){
var arr = this.Permute( this.Byte2Bit(this.key) , this.PC1_Table);
var AL = arr.slice(0,28);
var AR = arr.slice(28,56);
for(var i=0; i<16; i++) {
for(var j=0,k=this.LOOP_Table[i];j<k;j++){
AL.push(AL.shift());
AR.push(AR.shift());
}
this.subKeys[i] = this.Permute( AL.concat(AR) , this.PC2_Table );
}
};
//数组ar存储二进制数据,该函数将从头开始的每八位转换成对应的字符
DES.Bit2Byte = function(ar,fCh){
var str="";
if(fCh == "byte"){
var tmpAr = ar.join("").match(/.{8}/g);
for(var i=0,j=tmpAr.length; i<j; i++)
str += String.fromCharCode(parseInt(tmpAr[i],2));
}
else if(fCh == "hex"){
var tmpAr = ar.join("").match(/.{4}/g);
for(var i=0,j=tmpAr.length; i<j; i++)
str += "0123456789abcdef".charAt(parseInt(tmpAr[i],2));
}
else return "Error:Second param is wrong.";
return str;
};
//将字符串转换成二进制数组
DES.Byte2Bit = function(str){
for(var i=0,j=8*str.length,ar = [],ch=""; i<j; i++){
var k = 7 - i%8;
if(k == 7) ch = str.charCodeAt(parseInt(i/8,10));
ar.push( (ch >> k) & 1 );
}
return ar;
};
//将16进制字符串转变成二进制数组
DES.Hex2Bin = function(str){
for(var i=0,j=str.length,s=""; i<j; i++)
s += this.Oct2Bin[ parseInt(str.charAt(i),16)];
return s.split("");
};
DES.Xor = function(A,B){
for(var i=0,j=B.length,rtn=new Array(j); i<j; i++)
rtn[i] = A[i] ^ B[i];
return rtn;
}
DES.Permute = function(ar,tb){
for(var i=0,j=tb.length,rtn=new Array(j);i<j;i++)
rtn[i] = ar[tb[i]-1];
return rtn;
};
DES.F_func = function(Ri,Ki)
{
return this.Permute( this.S_func( this.Xor( this.Permute( Ri , this.E_Table ) , Ki) ) , this.P_Table);
};
//ar为输入48位串数组
DES.S_func = function(ar){
for(var i=0,arRtn = [];i<8;i++){
var x = i*6;
var j = parseInt(""+ar[x]+ar[x+5],2);
var k = parseInt(ar.slice(x+1,x+5).join(""),2);
arRtn = arRtn.concat( this.Oct2Bin[ this.S_Box[i][j][k] ].split("") );
}
return arRtn;
}
//mode参数为处理模式."Encrypt":加密 "Decrypt":解密,默认为加密
DES.Encrypt = function(mode){
mode = mode?mode:"Encrypt";
if(mode=="Decrypt")
var plainTextAr = this.Hex2Bin(this.text).join("").match(/.{64}/g);
else
var plainTextAr = this.Byte2Bit(this.text).join("").match(/.{64}/g);
for(var i=0,j=plainTextAr.length;i<j;i++){
var arr = this.Permute(plainTextAr[i].split(""),this.IP_Table)
var AL = arr.slice(0,32);
var AR = arr.slice(32,64);
if(mode == "Decrypt"){
for(var k=15;k>-1;k--){
var tmp = AR.slice(0,32);
AR = this.Xor(this.F_func(AR,this.subKeys[k]) , AL);
AL = tmp;
}
}
else{
for(var k=0;k<16;k++){
var tmp = AR.slice(0,32);
AR = this.Xor(this.F_func(AR,this.subKeys[k]) , AL);
AL = tmp;
}
}
plainTextAr[i] = this.Bit2Byte(this.Permute(AR.concat(AL), this.IPR_Table),(mode=="Decrypt"?"byte":"hex"));
}
return plainTextAr.join("").trim();
}
String.prototype.trim = function(){ return this.replace(/\s+$/g,"");}
//-->
</script>
<script language="JavaScript">
<!--
var $ = document.getElementById;
function jiami(){
DES.init($("txtKey").value,$("taText").value );
$("taCipher").value = DES.Encrypt();
}
function jiemi(){
DES.init($("txtKey").value,$("taCipher").value );
$("taText").value = DES.Encrypt("Decrypt");
}
//-->
</script>
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请输入加(解)密密钥:<input id="txtKey" type="text" onfocus="this.select()" value="47944980" size="10">
<font color="red">(*目前密钥只能是八位)</font><br>
未加密文本:<br>
<textarea id="taText">Hi,I'm meixuexiang.</textarea>
<input type="button" value="clear" onclick="document.all[this.sourceIndex-1].value=''"><br>
<input type="button" value="Encrypt" onclick="jiami()">
<input type="button" value="Decrypt" onclick="jiemi()"><br><br>
加密后文本:<br>
<textarea id="taCipher"></textarea>
<input type="button" value="clear" onclick="document.all[this.sourceIndex-1].value=''"><br>
<p>code by meixx(<a href="http://www.blogjava.net/mxx">梅雪香</a>) 2006-10-18 23:00 <a href="mailto:wy_hd@163.com">信息反馈</a></p>
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<html><head><meta http-equiv="content-type" content="text/html;charset=gb2312"><title>DES算法-Code by 梅雪香</title><style type="text/css">textarea{width:600px; height:150px;}
textarea
body{font-size:12px}input{font-size:12px}</style><script language="JavaScript"><!--var DES = { // initial permutation IP IP_Table : [ 58, 50, 42, 34, 26, 18, 10, 2, 60, 52, 44, 36, 28, 20, 12, 4, 62, 54, 46, 38, 30, 22, 14, 6, 64, 56, 48, 40, 32, 24, 16, 8, 57, 49, 41, 33, 25, 17, 9, 1, 59, 51, 43, 35, 27, 19, 11, 3, 61, 53, 45, 37, 29, 21, 13, 5, 63, 55, 47, 39, 31, 23, 15, 7 ], // final permutation IP^-1 IPR_Table : [ 40, 8, 48, 16, 56, 24, 64, 32, 39, 7, 47, 15, 55, 23, 63, 31, 38, 6, 46, 14, 54, 22, 62, 30, 37, 5, 45, 13, 53, 21, 61, 29, 36, 4, 44, 12, 52, 20, 60, 28, 35, 3, 43, 11, 51, 19, 59, 27, 34, 2, 42, 10, 50, 18, 58, 26, 33, 1, 41, 9, 49, 17, 57, 25 ], // permuted choice table (key) PC1_Table : [ 57, 49, 41, 33, 25, 17, 9, 1, 58, 50, 42, 34, 26, 18, 10, 2, 59, 51, 43, 35, 27, 19, 11, 3, 60, 52, 44, 36, 63, 55, 47, 39, 31, 23, 15, 7, 62, 54, 46, 38, 30, 22, 14, 6, 61, 53, 45, 37, 29, 21, 13, 5, 28, 20, 12, 4 ], // permuted choice key (table) PC2_Table : [ 14, 17, 11, 24, 1, 5, 3, 28, 15, 6, 21, 10, 23, 19, 12, 4, 26, 8, 16, 7, 27, 20, 13, 2, 41, 52, 31, 37, 47, 55, 30, 40, 51, 45, 33, 48, 44, 49, 39, 56, 34, 53, 46, 42, 50, 36, 29, 32 ], // number left rotations of pc1 LOOP_Table : [1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1], // expansion operation matrix E_Table : [ 32, 1, 2, 3, 4, 5, 4, 5, 6, 7, 8, 9, 8, 9, 10, 11, 12, 13, 12, 13, 14, 15, 16, 17, 16, 17, 18, 19, 20, 21, 20, 21, 22, 23, 24, 25, 24, 25, 26, 27, 28, 29, 28, 29, 30, 31, 32, 1 ], // 32-bit permutation function P used on the output of the S-boxes P_Table : [ 16, 7, 20, 21, 29, 12, 28, 17, 1, 15, 23, 26, 5, 18, 31, 10, 2, 8, 24, 14, 32, 27, 3, 9, 19, 13, 30, 6, 22, 11, 4, 25 ], // The (in)famous S-boxes S_Box : [ // S1 [[14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7], [ 0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8], [ 4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0], [15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13]], // S2 [[15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10], [ 3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5], [ 0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15], [13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9]], // S3 [[10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8], [13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1], [13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7], [ 1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12]], // S4 [[ 7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15], [13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9], [10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4], [ 3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14]], // S5 [[ 2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9], [14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6], [ 4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14], [11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3]], // S6 [[12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11], [10, 15, 4, 2, 7, 12, 9, 5, 6, 1, 13, 14, 0, 11, 3, 8], [ 9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10, 1, 13, 11, 6], [ 4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13]], // S7 [[ 4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1], [13, 0, 11, 7, 4, 9, 1, 10, 14, 3, 5, 12, 2, 15, 8, 6], [ 1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8, 0, 5, 9, 2], [ 6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12]], // S8 [[13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7], [ 1, 15, 13, 8, 10, 3, 7, 4, 12, 5, 6, 11, 0, 14, 9, 2], [ 7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13, 15, 3, 5, 8], [ 2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11]] ], Oct2Bin : ["0000","0001","0010","0011","0100","0101","0110","0111", "1000","1001","1010","1011","1100","1101","1110","1111" ], //str 为八位的字符 subKeys : new Array(16), key : "", text : ""};DES.init = function(key,text){ if(key != this.key){
this.key=key; this.GenSubKey(); } this.text= text + " ".substring(0,parseInt("07654321".charAt( text.length%8 ),10));};DES.GenSubKey = function(){ var arr = this.Permute( this.Byte2Bit(this.key) , this.PC1_Table); var AL = arr.slice(0,28); var AR = arr.slice(28,56); for(var i=0; i<16; i++) { for(var j=0,k=this.LOOP_Table[i];j<k;j++){ AL.push(AL.shift()); AR.push(AR.shift()); } this.subKeys[i] = this.Permute( AL.concat(AR) , this.PC2_Table ); }};//数组ar存储二进制数据,该函数将从头开始的每八位转换成对应的字符DES.Bit2Byte = function(ar,fCh){ var str=""; if(fCh == "byte"){ var tmpAr = ar.join("").match(/.{8}/g); for(var i=0,j=tmpAr.length; i<j; i++) str += String.fromCharCode(parseInt(tmpAr[i],2)); } else if(fCh == "hex"){ var tmpAr = ar.join("").match(/.{4}/g); for(var i=0,j=tmpAr.length; i<j; i++) str += "0123456789abcdef".charAt(parseInt(tmpAr[i],2)); } else return "Error:Second param is wrong."; return str;};//将字符串转换成二进制数组DES.Byte2Bit = function(str){ for(var i=0,j=8*str.length,ar = [],ch=""; i<j; i++){ var k = 7 - i%8; if(k == 7) ch = str.charCodeAt(parseInt(i/8,10)); ar.push( (ch >> k) & 1 ); } return ar;};//将16进制字符串转变成二进制数组DES.Hex2Bin = function(str){ for(var i=0,j=str.length,s=""; i<j; i++) s += this.Oct2Bin[ parseInt(str.charAt(i),16)]; return s.split("");};DES.Xor = function(A,B){ for(var i=0,j=B.length,rtn=new Array(j); i<j; i++) rtn[i] = A[i] ^ B[i]; return rtn;}DES.Permute = function(ar,tb){ for(var i=0,j=tb.length,rtn=new Array(j);i<j;i++) rtn[i] = ar[tb[i]-1]; return rtn;};DES.F_func = function(Ri,Ki){ return this.Permute( this.S_func( this.Xor( this.Permute( Ri , this.E_Table ) , Ki) ) , this.P_Table);};//ar为输入48位串数组DES.S_func = function(ar){ for(var i=0,arRtn = [];i<8;i++){ var x = i*6; var j = parseInt(""+ar[x]+ar[x+5],2); var k = parseInt(ar.slice(x+1,x+5).join(""),2); arRtn = arRtn.concat( this.Oct2Bin[ this.S_Box[i][j][k] ].split("") ); } return arRtn;}//mode参数为处理模式."Encrypt":加密 "Decrypt":解密,默认为加密DES.Encrypt = function(mode){ mode = mode?mode:"Encrypt"; if(mode=="Decrypt") var plainTextAr = this.Hex2Bin(this.text).join("").match(/.{64}/g); else var plainTextAr = this.Byte2Bit(this.text).join("").match(/.{64}/g); for(var i=0,j=plainTextAr.length;i<j;i++){ var arr = this.Permute(plainTextAr[i].split(""),this.IP_Table) var AL = arr.slice(0,32); var AR = arr.slice(32,64); if(mode == "Decrypt"){ for(var k=15;k>-1;k--){ var tmp = AR.slice(0,32); AR = this.Xor(this.F_func(AR,this.subKeys[k]) , AL); AL = tmp; } } else{ for(var k=0;k<16;k++){ var tmp = AR.slice(0,32); AR = this.Xor(this.F_func(AR,this.subKeys[k]) , AL); AL = tmp; } } plainTextAr[i] = this.Bit2Byte(this.Permute(AR.concat(AL), this.IPR_Table),(mode=="Decrypt"?"byte":"hex")); } return plainTextAr.join("").trim();}String.prototype.trim = function(){ return this.replace(/\s+$/g,"");}//--></script><script language="JavaScript"><!--var $ = document.getElementById;function jiami(){ DES.init($("txtKey").value,$("taText").value ); $("taCipher").value = DES.Encrypt();}function jiemi(){ DES.init($("txtKey").value,$("taCipher").value ); $("taText").value = DES.Encrypt("Decrypt");}//--></script></head><body>请输入加(解)密密钥:<input id="txtKey" type="text" onfocus="this.select()" value="47944980" size="10"><font color="red">(*目前密钥只能是八位)</font><br>未加密文本:<br><textarea id="taText">Hi,I'm meixuexiang.</textarea><input type="button" value="clear" onclick="document.all[this.sourceIndex-1].value=''"><br><input type="button" value="Encrypt" onclick="jiami()"> <input type="button" value="Decrypt" onclick="jiemi()"><br><br>加密后文本:<br><textarea id="taCipher"></textarea><input type="button" value="clear" onclick="document.all[this.sourceIndex-1].value=''"><br><p>code by meixx(<a href="http://www.blogjava.net/mxx">梅雪香</a>) 2006-10-18 23:00 <a href="mailto:wy_hd@163.com">信息反馈</a></p></body></html>
