More Pass Protect JavaScripts
Exclusive Or Encryption
Description
This JavaScript performs a bitwise XOR (Exclusive Or) on each byte of the data you wish to encrypt using the key you provide. Useful as an additional security precaution when sending sensitive information over the Internet. (However, this method is not foolproof and should not be your only form of security.) Longer and more random keys increase the strength of the encryption....View A Script Demo
This JavaScript performs a bitwise XOR (Exclusive Or) on each byte of the data you wish to encrypt using the key you provide. Useful as an additional security precaution when sending sensitive information over the Internet. (However, this method is not foolproof and should not be your only form of security.) Longer and more random keys increase the strength of the encryption....View A Script Demo
Do you find it confusing setting up these script?
Java Scripts Magic can do all the hard work for you all At The Touch Of A Button.
Java Scripts Magic can do all the hard work for you all At The Touch Of A Button.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
<HTML>
<HEAD>
<META NAME="Generator" CONTENT="TextPad 4.4">
<LINK href="general.css" rel="stylesheet" type="text/css">
<SCRIPT LANGUAGE="JavaScript">
<!-- Original: Terry Yuen (kaiser40@yahoo.com) -->
<!-- Begin
var allowedChars = " !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~ ";
function CharToDec(Character) {
var pos = allowedChars.indexOf(Character.charAt(0));
if(pos == -1) {
window.status += Character;
pos = 0;
}
return pos;
}
function DecToBin(Decimal) {
var i = 0;
var Bin = "";
while(Decimal > Math.pow(2, i)) {
i++;
}
for (var i = i; i >= 0; i--) {
if (Decimal >= Math.pow(2, i)) {
Decimal -= Math.pow(2, i);
Bin += "1";
} else Bin += "0";
}
return Bin;
}
function ExclusiveOr(input1, input2) {
var output = "";
while(input1.length < input2.length) {
input1 = "0" + input1;
}
while(input1.length > input2.length) {
input2 = "0" + input2;
}
if (input1.length == input2.length) {
for (var i=0; i<input1.length; i++) {
output += (input1.charAt(i) != input2.charAt(i)) ? "1" : "0";
}
} else alert("XOR Operation Error.");
return output;
}
function BinToDec(Binary) {
var Dec = 0;
for(var i=0; i<=Binary.length; i++) {
Dec += Math.pow(2,i) * Binary.charAt((Binary.length - 1) - i);
}
return Dec;
}
function DecToChar(Decimal) {
if (Decimal > allowedChars.length) {
Decimal = 0;
}
var pos = allowedChars.charAt(Decimal);
return pos;
}
function BlockEncrypt(input1, input2) {
var output = "";
if (input1.length == input2.length) {
for (var i = 0; i < input1.length; i++) {
output += DecToChar(BinToDec(ExclusiveOr(DecToBin(CharToDec(input1.charAt(i))), DecToBin(CharToDec(input2.charAt(i))))));
}
} else alert("Block Encryption Error.");
return output;
}
/* Function: Encrypts data.
Parameters: 2 parameters: (text string, key)
Returns: Encrypted string
Decrypt the string by running function twice.
*/
function EncryptString(plainText, key) {
var cipherText = "";
var textBlock, keyBlock = "";
var keyRotationPos = 0;
var beforePos, afterPos = 0;
var blockSize = 48;
var key = hashKey(key);
while(afterPos < plainText.length) {
beforePos = 0;
afterPos = blockSize;
if(afterPos < plainText.length) {
afterPos = plainText.length;
}
textBlock = plainText.substring(beforePos, afterPos);
keyBlock = key.substring(keyRotationPos, key.length);
while(keyBlock.length < textBlock.length) {
keyBlock += key;
}
keyBlock = keyBlock.substring(0, textBlock.length);
keyRotationPos = keyBlock.length % key.length;
cipherText += BlockEncrypt(textBlock, keyBlock);
beforePos = afterPos;
afterPos += blockSize;
}
return cipherText;
}
function hashKey(key) {
var hash = "";
for (var i = 0; i < key.length; i++) {
hash += DecToChar((CharToDec(key.charAt(i)) + i) % allowedChars.length);
}
return hash;
}
// End -->
</script>
</HEAD>
<BODY Background=../graphics/grayback.jpg>
<center><BR><BR><BR>
<form name=box>
<table cellpadding=0 cellspacing=0 border=0>
<tr>
<td colspan=3>
<textarea wrap=soft cols=40 rows=5 wrap=virtual name=ipt></textarea>
</td>
</tr>
<tr height=50>
<td align=center>
<input type=button onclick="document.box.ipt.value=EncryptString(document.box.ipt.value,document.box.pwd.value);" value="Encrypt / Decrypt"><br>
... using password: <input type=text name=pwd value="password">
</td>
</tr>
</table>
</form>
</center>
</BODY>
</HTML>
<HTML>
<HEAD>
<META NAME="Generator" CONTENT="TextPad 4.4">
<LINK href="general.css" rel="stylesheet" type="text/css">
<SCRIPT LANGUAGE="JavaScript">
<!-- Original: Terry Yuen (kaiser40@yahoo.com) -->
<!-- Begin
var allowedChars = " !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~ ";
function CharToDec(Character) {
var pos = allowedChars.indexOf(Character.charAt(0));
if(pos == -1) {
window.status += Character;
pos = 0;
}
return pos;
}
function DecToBin(Decimal) {
var i = 0;
var Bin = "";
while(Decimal > Math.pow(2, i)) {
i++;
}
for (var i = i; i >= 0; i--) {
if (Decimal >= Math.pow(2, i)) {
Decimal -= Math.pow(2, i);
Bin += "1";
} else Bin += "0";
}
return Bin;
}
function ExclusiveOr(input1, input2) {
var output = "";
while(input1.length < input2.length) {
input1 = "0" + input1;
}
while(input1.length > input2.length) {
input2 = "0" + input2;
}
if (input1.length == input2.length) {
for (var i=0; i<input1.length; i++) {
output += (input1.charAt(i) != input2.charAt(i)) ? "1" : "0";
}
} else alert("XOR Operation Error.");
return output;
}
function BinToDec(Binary) {
var Dec = 0;
for(var i=0; i<=Binary.length; i++) {
Dec += Math.pow(2,i) * Binary.charAt((Binary.length - 1) - i);
}
return Dec;
}
function DecToChar(Decimal) {
if (Decimal > allowedChars.length) {
Decimal = 0;
}
var pos = allowedChars.charAt(Decimal);
return pos;
}
function BlockEncrypt(input1, input2) {
var output = "";
if (input1.length == input2.length) {
for (var i = 0; i < input1.length; i++) {
output += DecToChar(BinToDec(ExclusiveOr(DecToBin(CharToDec(input1.charAt(i))), DecToBin(CharToDec(input2.charAt(i))))));
}
} else alert("Block Encryption Error.");
return output;
}
/* Function: Encrypts data.
Parameters: 2 parameters: (text string, key)
Returns: Encrypted string
Decrypt the string by running function twice.
*/
function EncryptString(plainText, key) {
var cipherText = "";
var textBlock, keyBlock = "";
var keyRotationPos = 0;
var beforePos, afterPos = 0;
var blockSize = 48;
var key = hashKey(key);
while(afterPos < plainText.length) {
beforePos = 0;
afterPos = blockSize;
if(afterPos < plainText.length) {
afterPos = plainText.length;
}
textBlock = plainText.substring(beforePos, afterPos);
keyBlock = key.substring(keyRotationPos, key.length);
while(keyBlock.length < textBlock.length) {
keyBlock += key;
}
keyBlock = keyBlock.substring(0, textBlock.length);
keyRotationPos = keyBlock.length % key.length;
cipherText += BlockEncrypt(textBlock, keyBlock);
beforePos = afterPos;
afterPos += blockSize;
}
return cipherText;
}
function hashKey(key) {
var hash = "";
for (var i = 0; i < key.length; i++) {
hash += DecToChar((CharToDec(key.charAt(i)) + i) % allowedChars.length);
}
return hash;
}
// End -->
</script>
</HEAD>
<BODY Background=../graphics/grayback.jpg>
<center><BR><BR><BR>
<form name=box>
<table cellpadding=0 cellspacing=0 border=0>
<tr>
<td colspan=3>
<textarea wrap=soft cols=40 rows=5 wrap=virtual name=ipt></textarea>
</td>
</tr>
<tr height=50>
<td align=center>
<input type=button onclick="document.box.ipt.value=EncryptString(document.box.ipt.value,document.box.pwd.value);" value="Encrypt / Decrypt"><br>
... using password: <input type=text name=pwd value="password">
</td>
</tr>
</table>
</form>
</center>
</BODY>
</HTML>
If you have a Business Proposal that you think may be of interest to us here at Best Download Sites please contact us to discuss the matter in further detail