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DecryptSourceProtection/decrypt.html

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Create decrypt.html
2013-06-13 04:30:38 +00:00
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>RSLogix 5000 Source Protection Decryption</title>
<script src="https://crypto-js.googlecode.com/svn/tags/3.1.2/build/rollups/aes.js"></script>
<script src="https://crypto-js.googlecode.com/svn/tags/3.1.2/build/rollups/sha256.js"></script>
<script src="https://crypto-js.googlecode.com/svn/tags/3.1.2/build/components/enc-utf16-min.js"></script>
<script>
"use strict";
var xpath = "//EncodedData|//*[@EncodedSourceKey]";
var keymatl = '\x59\x00\x53\x00\x33\x00\x3F\x00\x43\x00\x4E\x00\x21\x00\x40\x00\x42\x00\x73\x00\x49\x00\x74\x00\x39\x00\x6C\x00\x70\x00\x2D\x00\x3D\x00\x43\x00\x4A\x00\x32\x00\x30\x00\x65\x00\x4C\x00\x45\x00\x76\x00\x21\x00\x5A\x00\x64\x00\x49\x00\x53\x00\x33\x00\x25\x00\x68\x00\x52\x00\x6B\x00\x47\x00\x70\x00\x57\x00\x72\x00\x79\x00\x4F\x00\x59\x00\x21\x00\x6C\x00\x69\x00\x21\x00\x4C\x00\x2F\x00\x6E\x00\x38\x00\x5F\x00\x23\x00\x2A\x00\x76\x00\x34\x00\x2E\x00\x48\x00\x7A\x00\x57\x00\x48\x00\x2D\x00\x70\x00\x34\x00\x76\x00';
function print(text, color) {
var output = document.getElementById('output');
var span = document.createElement('span');
span.style.color = color;
span.appendChild(document.createTextNode(text));
output.appendChild(span);
output.appendChild(document.createElement('br'));
}
function decrypt(b64text, format) {
var ciphertext = CryptoJS.enc.Base64.parse(b64text);
var key = CryptoJS.SHA256(keymatl);
var iv = CryptoJS.lib.WordArray.create([0, 0, 0, 0]);
var options = {iv: iv, mode: CryptoJS.mode.CBC};
var decryptor = CryptoJS.algo.AES.createDecryptor(key, options);
var part1 = decryptor.process(ciphertext);
var part2 = decryptor.finalize();
var plaintext = part1.toString(format) + part2.toString(format);
if (plaintext.length == 0 && ciphertext.words.length > 0) {
print('Decryption was unsuccessful', 'red');
}
return plaintext;
}
function patchXML(data) {
try {
var doc = new DOMParser().parseFromString(data, 'application/xml');
var flag = true;
while (flag)
{
var result = doc.evaluate(xpath, doc, null, XPathResult.ANY_UNORDERED_NODE_TYPE, null);
var element = result.singleNodeValue;
if (element == null) {
flag = false;
continue;
}
if (element.tagName == 'EncodedData') {
if (element.getAttribute('EncryptionConfig') != '3') {
print('Warning: An unsupported EncryptionConfig value was found. Decryption may not work', 'orange');
}
var list = [];
for (var i = 0; i < element.childNodes.length; i++) {
var child = element.childNodes[i];
if (child.nodeType == Node.TEXT_NODE) {
list.push(child.nodeValue.replace(/\n/g, ''));
}
}
var decoded = decrypt(list.join(''), CryptoJS.enc.Utf16LE);
var subdoc = new DOMParser().parseFromString(decoded, 'application/xml');
for (var i = 0; i < subdoc.childNodes.length; i++) {
var imported = doc.importNode(subdoc.childNodes[i], true);
element.parentNode.insertBefore(imported, element);
}
element.parentNode.removeChild(element);
print('Unpacked encoded data', 'green');
} else if (element.hasAttribute('EncodedSourceKey')) {
var decoded = decrypt(element.getAttribute('EncodedSourceKey'), CryptoJS.enc.Latin1);
element.removeAttribute('EncodedSourceKey');
if (element.hasAttribute('SourceProtectionType')) {
element.removeAttribute('SourceProtectionType');
}
if (element.hasAttribute('EditedDate')) {
var date = new Date(element.getAttribute('EditedDate'));
date.setMilliseconds(1 + date.getMilliseconds());
element.setAttribute('EditedDate', date.toISOString());
}
print('Found source key: "' + decoded + '"', 'green');
}
}
return new XMLSerializer().serializeToString(doc);
} catch (e) {
print('Exception caught: ' + e, 'red');
console.log(e);
throw e;
}
}
function handleDrop(event) {
if (event.dataTransfer.files.length == 1) {
var file = event.dataTransfer.files[0];
var fr = new FileReader();
fr.addEventListener('load', function(frevent) {
var textin = document.getElementById('textin');
var textout = document.getElementById('textout');
textin.value = frevent.target.result;
textout.value = patchXML(frevent.target.result);
textout.focus();
textout.select();
}, true);
fr.readAsText(file);
}
}
document.addEventListener('DOMContentLoaded', function(event) {
document.getElementById('button').addEventListener('click', function(event) {
var textin = document.getElementById('textin');
var textout = document.getElementById('textout');
textout.value = patchXML(textin.value);
textout.focus();
textout.select();
}, true);
document.body.addEventListener('dragover', function(event) {
event.preventDefault();
}, true);
document.body.addEventListener('drop', function(event) {
event.preventDefault();
handleDrop(event);
}, true);
}, true);
</script>
</head>
<body>
<form><table><tr>
<td>
<label for="textin">Input (with encrypted sections)</label>
<br />
<textarea id="textin" name="textin" rows="10" cols="40" placeholder="Paste the text of your exported XML here (starts with <?xml version=...)"></textarea>
</td>
<td style="vertical-align: middle;">
Update decrypt.html
2013-06-13 05:24:07 +00:00
<button id="button" type="button">Decrypt &rarr;</button>
Create decrypt.html
2013-06-13 04:30:38 +00:00
</td>
<td>
<label for="textout">Output (decrypted)</label>
<br />
Update decrypt.html
2013-06-13 05:24:07 +00:00
<textarea id="textout" name="textout" rows="10" cols="40" placeholder="Decrypted text will appear here"></textarea>
Create decrypt.html
2013-06-13 04:30:38 +00:00
</td>
</tr></table></form>
<div id="output">
Drag a .L5X file onto this page, or open it in Notepad and paste its contents into the text box
<br />
</div>
</body>
</html>
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