I want to change the style of the Discuz forum today. After downloading the style file, I found it was encrypted by Base64.
Kobayashi recommends a decryption page. The extracted code is as follows:
Copy codeThe Code is as follows: <! DOCTYPE html PUBLIC "-// W3C // dtd html 4.01 Transitional // EN">
<Html>
<Head>
<Title> Base64 and URL and Hex Encoding and Decoding </title>
<Meta name = "description" content = "Encodes or decodes data in Base64 or URL encoding using client side JavaScript"/>
<Meta name = "keywords" content = "base64, base 64, urlencode, urldecode, hexencode, hex encode, hexdecode hex decode, javascript base64, javascript base 64, javascript urlencode, javascript urldecode, javascript hexencode, javascript hexdecode "/>
<Link rel = "shortcut icon" href = "http://ostermiller.org/favicon.ico" type = "image/x-icon"/>
<Script language = javascript type = "text/javascript">
<! --
Function urlDecode (str ){
Str = str. replace (new RegExp ('\\+', 'G '),'');
Return unescape (str );
}
Function urlEncode (str ){
Str = escape (str );
Str = str. replace (new RegExp ('\\+', 'G'), '% 2B ');
Return str. replace (new RegExp ('% 20', 'G'),' + ');
}
Var END_OF_INPUT =-1;
Var base64Chars = new Array (
'A', 'B', 'C', 'D', 'E', 'E', 'F', 'G', 'h ',
'I', 'J', 'k', 'l', 'M', 'n', 'O', 'P ',
'Q', 'R', 's', 't', 'U', 'V', 'w', 'x ',
'Y', 'z', 'A', 'B', 'C', 'D', 'E', 'F ',
'G', 'h', 'I', 'J', 'k', 'l', 'M', 'n ',
'O', 'P', 'Q', 'R', 's', 't', 'U', 'V ',
'W', 'x', 'y', 'z', '0', '1', '2', '3 ',
'4', '5', '6', '7', '8', '9', '+ ','/'
);
Var reverseBase64Chars = new Array ();
For (var I = 0; I <base64Chars. length; I ++ ){
ReverseBase64Chars [base64Chars [I] = I;
}
Var base64Str;
Var base64Count;
Function setBase64Str (str ){
Base64Str = str;
Base64Count = 0;
}
Function readBase64 (){
If (! Base64Str) return END_OF_INPUT;
If (base64Count> = base64Str. length) return END_OF_INPUT;
Var c = base64Str. charCodeAt (base64Count) & 0xff;
Base64Count ++;
Return c;
}
Function encodeBase64 (str ){
SetBase64Str (str );
Var result = '';
Var inBuffer = new Array (3 );
Var lineCount = 0;
Var done = false;
While (! Done & (inBuffer [0] = readBase64 ())! = END_OF_INPUT ){
InBuffer [1] = readBase64 ();
InBuffer [2] = readBase64 ();
Result + = (base64Chars [inBuffer [0]> 2]);
If (inBuffer [1]! = END_OF_INPUT ){
Result + = (base64Chars [(inBuffer [0] <4) & 0x30) | (inBuffer [1]> 4)]);
If (inBuffer [2]! = END_OF_INPUT ){
Result + = (base64Chars [(inBuffer [1] <2) & 0x3c) | (inBuffer [2]> 6)]);
Result + = (base64Chars [inBuffer [2] & 0x3F]);
} Else {
Result + = (base64Chars [(inBuffer [1] <2) & 0x3c)]);
Result + = ('= ');
Done = true;
}
} Else {
Result + = (base64Chars [(inBuffer [0] <4) & 0x30)]);
Result + = ('= ');
Result + = ('= ');
Done = true;
}
LineCount + = 4;
If (lineCount> = 76 ){
Result + = ('\ n ');
LineCount = 0;
}
}
Return result;
}
Function readReverseBase64 (){
If (! Base64Str) return END_OF_INPUT;
While (true ){
If (base64Count> = base64Str. length) return END_OF_INPUT;
Var nextCharacter = base64Str. charAt (base64Count );
Base64Count ++;
If (reverseBase64Chars [nextCharacter]) {
Return reverseBase64Chars [nextCharacter];
}
If (nextCharacter = 'A') return 0;
}
Return END_OF_INPUT;
}
Function ntos (n ){
N = n. toString (16 );
If (n. length = 1) n = "0" + n;
N = "%" + n;
Return unescape (n );
}
Function decodeBase64 (str ){
SetBase64Str (str );
Var result = "";
Var inBuffer = new Array (4 );
Var done = false;
While (! Done & (inBuffer [0] = readReverseBase64 ())! = END_OF_INPUT
& (InBuffer [1] = readReverseBase64 ())! = END_OF_INPUT ){
InBuffer [2] = readReverseBase64 ();
InBuffer [3] = readReverseBase64 ();
Result + = ntos (inBuffer [0] <2) & 0xff) | inBuffer [1]> 4 ));
If (inBuffer [2]! = END_OF_INPUT ){
Result + = ntos (inBuffer [1] <4) & 0xff) | inBuffer [2]> 2 ));
If (inBuffer [3]! = END_OF_INPUT ){
Result + = ntos (inBuffer [2] <6) & 0xff) | inBuffer [3]);
} Else {
Done = true;
}
} Else {
Done = true;
}
}
Return result;
}
Var digitArray = new Array ('0', '1', '2', '3', '4', '5', '6', '7 ', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F ');
Function toHex (n ){
Var result =''
Var start = true;
For (var I = 32; I> 0 ;){
I-= 4;
Var digit = (n> I) & 0xf;
If (! Start | digit! = 0 ){
Start = false;
Result + = digitArray [digit];
}
}
Return (result = ''? '0': result );
}
Function pad (str, len, pad ){
Var result = str;
For (var I = str. length; I <len; I ++ ){
Result = pad + result;
}
Return result;
}
Function encodeHex (str ){
Var result = "";
For (var I = 0; I <str. length; I ++ ){
Result + = pad (toHex (str. charCodeAt (I) & 0xff), 2, '0 ');
}
Return result;
}
Function decodeHex (str ){
Str = str. replace (new RegExp ("s/[^ 0-9a-zA-Z] // g "));
Var result = "";
Var nextchar = "";
For (var I = 0; I <str. length; I ++ ){
Nextchar + = str. charAt (I );
If (nextchar. length = 2 ){
Result + = ntos (eval ('0x '+ nextchar ));
Nextchar = "";
}
}
Return result;
}
// --> </Script>
</Head>
<Body>
<Form name = code onsubmit = "return false ()">
<Textarea name = text style = 'width: 100%; height: 75%; 'onfocus = 'if (this. value = "Enter text to encode or decode here. ") {this. value = "";} '> Enter text to encode or decode here. </textarea>
<Table>
<Tr> <td align = center>
<Input value = "Encode" type = button onclick = "document. code. text. value = urlEncode (document. code. text. value);">
</Td> <td align = center>
URL
</Td> <td align = center>
<Input value = "Decode" type = button onclick = "document. code. text. value = urlDecode (document. code. text. value);">
</Td> </tr>
<Tr> <td align = center>
<Input value = "Encode" type = button onclick = "document. code. text. value = encodeBase64 (document. code. text. value);">
</Td> <td align = center>
Base 64
</Td> <td align = center>
<Input value = "Decode" type = button onclick = "document. code. text. value = decodeBase64 (document. code. text. value);">
</Td> </tr>
<Tr> <td align = center>
<Input value = "Encode" type = button onclick = "document. code. text. value = encodeHex (document. code. text. value);">
</Td> <td align = center>
Hex
</Td> <td align = center>
<Input value = "Decode" type = button onclick = "document. code. text. value = decodeHex (document. code. text. value);">
</Td> </tr>
<Tr> <td align = center>
</Td> <td align = center>
<Input type = reset value = Clear>
</Td> <td align = center>
</Td> </tr>
</Table>
</Form>
<Hr>
Base64 encode/decode was ported from a <a href = "http://ostermiller.org/utils/Base64.html"> Java Base64 encoder/decoder </a>. <br>
Base64 encode/decode was ported to <a href = "http://ostermiller.org/base64_actionscript.html"> Macromedia Actionscript </a>. <br>
<H3> License <P> This program is free software; you can redistribute it and/or modify it
Under the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2 of the License, or (at your option)
Any later version. </p>
<P> This program is distributed in the hope that it will be useful,
But without any warranty; without even the implied warranty of MERCHANTABILITY
Or fitness for a particle PURPOSE. See
<A href = "http://www.gnu.org/copyleft/gpl.html"> GNU
General Public License </a> for more details. </p>
<Div style = "padding: 0.2;"> <a href = "http://ostermiller.org/calc/"> More converters, calculators, and other JavaScript goodies </a> </div>
<Div style = "padding: 0.2; text-align: right; "> <a href =" http://ostermiller.org/"> ostermiller.org </a> (<a href =" http://ostermiller.org/siteindex.html "> site index </a>) </div>
<Div style = "padding: 0.2;"> <p> Copyright <a href = "http://ostermiller.org/contact.pl? Regarding = JavaScript + Encoding "class = mail> Stephen Ostermiller </a> 2003-2006 </p> </div>
</Body>
</Html>
