密码加密，求如何解密

peng_840228 2010-01-28 09:53:19

把下列代码，复制到记事本另存为HTML，求 DecryptionPassword()的解密方法。先谢过了

<html>
<head>
<title>
Title
</title>
</head>
<script language="JavaScript">
function EncryptPassword(){
var password = document.getElementById("yy").value;
var baseByte = 65; //'A'
var key = "ol94hQz2h5Nb4zuWj";
var pw = (StringToFourBit(ApplyXORKey(password, key), baseByte));
document.ff.elements["tt"].value = pw;
//return password;
}
function StringToFourBit(value, baseByte){
if (!value)
return "";
var newValue = "";
var loop1 = 0;
for (loop1=0;loop1<value.length;loop1++){
var b = (value.charCodeAt(loop1));
var hiBits = (((b & 0xF0)>> 4) + baseByte);
var lowBits = ((b & 0x0F) + baseByte);
newValue += String.fromCharCode(hiBits);
newValue += String.fromCharCode(lowBits);
}

return newValue;
}
function ApplyXORKey(value, key){
if ((!value) || (!key))
return "";
var newValue = "";
var loop1=0;
for (loop1=0;loop1<value.length;loop1++){
newValue += (String.fromCharCode(value.charCodeAt(loop1) ^ key.charCodeAt(loop1 % key.length)));
}
return newValue;
}
function DecryptionPassword(){
var password = document.getElementById("mm").value;
document.ff.elements["jj"].value = password;
}
</script>
<body>
<form name="ff">
<h1>
<input type="text" id="yy" name="yy" value="">
<input type="button" value="加密" onclick="EncryptPassword()">
<input type="text" id="tt" name="tt" value="">
<br>
<input type="text" id="mm" name="mm" value="">
<input type="button" value="解密" onclick="DecryptionPassword()">
<input type="text" id="jj" name="jj" value="">
</h1>
</form>
</body>
</html>

...全文

77 3 打赏收藏转发到动态举报

写回复

用AI写文章

3 条回复

切换为时间正序

请发表友善的回复…

发表回复

蛋黄车 2010-01-28

打赏
举报

JS问题啊！

我试验一下，呵呵

hchjjun 2010-01-28

打赏
举报

实现就好。

peng_840228 2010-01-28

打赏
举报

实现了......
function DecryptionPassword(){
var password = document.getElementById("mm").value;
var dpp='';
var baseByte = 65; //'A'
for(var i=0;i<password.length;i=i+2){
var high = ((password.charCodeAt(i)-baseByte)<<4);
var low = password.charCodeAt(i+1)-baseByte;
var key = "ol94hQz2h5Nb4zuWj";
dpp+= (String.fromCharCode(key.charCodeAt((i/2) % key.length) ^(high+low)));
}
document.ff.elements["jj"].value = dpp;
}