织梦密码的加密与解密程序
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<P>织梦加密解密</P>超强的页面加密
<SCRIPT language=JavaScript>
<!-- Begin
function encrypt(str, 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. 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;
}
function decrypt(str, pwd) {
if(str == null || str.length < 8) {
alert("A salt value could not be extracted from the encrypted message because its length is too short. The message cannot be decrypted.");
return;
}
if(pwd == null || pwd.length <= 0) {
alert("Please enter a password with which to decrypt the message.");
return;
}
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.round(pwd.length / 2);
var modu = Math.pow(2, 31) - 1;
var salt = parseInt(str.substring(str.length - 8, str.length), 16);
str = str.substring(0, str.length - 8);
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+=2) {
enc_chr = parseInt(parseInt(str.substring(i, i+2), 16) ^ Math.floor((prand / modu) * 255));
enc_str += String.fromCharCode(enc_chr);
prand = (mult * prand + incr) % modu;
}
return enc_str;
}
// End -->
</SCRIPT><FORM name=box>
<CENTER>
<TABLE cellSpacing=0 cellPadding=0 border=0>
<TBODY>
<TR>
<TD colSpan=3><TEXTAREA name=ipt rows=5 wrap=virtual cols=40>Welcome to wzwzx.net</TEXTAREA> </TD></TR>
<TR height=50>
<TD vAlign=top><INPUT onclick="document.box.opt.value= encrypt(document.box.ipt.value, document.box.pwd.value);" type=button value=加密> </TD>
<TD vAlign=center align=middle><INPUT value=password name=pwd> </TD>
<TD vAlign=bottom align=right><INPUT onclick="document.box.ipt.value= decrypt(document.box.opt.value, document.box.pwd.value);" type=button value=解密> </TD></TR>
<TR>
<TD colSpan=3><TEXTAREA name=opt rows=5 wrap=virtual cols=40></TEXTAREA> </TD></TR></TBODY></TABLE></CENTER></FORM>
补充：综合编程 , 安全编程 ,
