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Create decrypt.html
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skdatmonster
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decrypt.html
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141
decrypt.html
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<title>RSLogix 5000 Source Protection Decryption</title>
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<script src="https://crypto-js.googlecode.com/svn/tags/3.1.2/build/rollups/aes.js"></script>
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<script src="https://crypto-js.googlecode.com/svn/tags/3.1.2/build/rollups/sha256.js"></script>
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<script src="https://crypto-js.googlecode.com/svn/tags/3.1.2/build/components/enc-utf16-min.js"></script>
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<script>
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"use strict";
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var xpath = "//EncodedData|//*[@EncodedSourceKey]";
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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';
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function print(text, color) {
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var output = document.getElementById('output');
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var span = document.createElement('span');
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span.style.color = color;
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span.appendChild(document.createTextNode(text));
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output.appendChild(span);
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output.appendChild(document.createElement('br'));
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}
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function decrypt(b64text, format) {
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var ciphertext = CryptoJS.enc.Base64.parse(b64text);
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var key = CryptoJS.SHA256(keymatl);
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var iv = CryptoJS.lib.WordArray.create([0, 0, 0, 0]);
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var options = {iv: iv, mode: CryptoJS.mode.CBC};
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var decryptor = CryptoJS.algo.AES.createDecryptor(key, options);
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var part1 = decryptor.process(ciphertext);
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var part2 = decryptor.finalize();
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var plaintext = part1.toString(format) + part2.toString(format);
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if (plaintext.length == 0 && ciphertext.words.length > 0) {
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print('Decryption was unsuccessful', 'red');
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}
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return plaintext;
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}
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function patchXML(data) {
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try {
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var doc = new DOMParser().parseFromString(data, 'application/xml');
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var flag = true;
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while (flag)
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{
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var result = doc.evaluate(xpath, doc, null, XPathResult.ANY_UNORDERED_NODE_TYPE, null);
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var element = result.singleNodeValue;
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if (element == null) {
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flag = false;
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continue;
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}
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if (element.tagName == 'EncodedData') {
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if (element.getAttribute('EncryptionConfig') != '3') {
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print('Warning: An unsupported EncryptionConfig value was found. Decryption may not work', 'orange');
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}
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var list = [];
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for (var i = 0; i < element.childNodes.length; i++) {
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var child = element.childNodes[i];
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if (child.nodeType == Node.TEXT_NODE) {
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list.push(child.nodeValue.replace(/\n/g, ''));
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}
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}
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var decoded = decrypt(list.join(''), CryptoJS.enc.Utf16LE);
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var subdoc = new DOMParser().parseFromString(decoded, 'application/xml');
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for (var i = 0; i < subdoc.childNodes.length; i++) {
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var imported = doc.importNode(subdoc.childNodes[i], true);
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element.parentNode.insertBefore(imported, element);
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}
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element.parentNode.removeChild(element);
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print('Unpacked encoded data', 'green');
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} else if (element.hasAttribute('EncodedSourceKey')) {
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var decoded = decrypt(element.getAttribute('EncodedSourceKey'), CryptoJS.enc.Latin1);
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element.removeAttribute('EncodedSourceKey');
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if (element.hasAttribute('SourceProtectionType')) {
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element.removeAttribute('SourceProtectionType');
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}
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if (element.hasAttribute('EditedDate')) {
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var date = new Date(element.getAttribute('EditedDate'));
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date.setMilliseconds(1 + date.getMilliseconds());
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element.setAttribute('EditedDate', date.toISOString());
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}
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print('Found source key: "' + decoded + '"', 'green');
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}
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}
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return new XMLSerializer().serializeToString(doc);
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} catch (e) {
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print('Exception caught: ' + e, 'red');
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console.log(e);
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throw e;
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}
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}
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function handleDrop(event) {
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if (event.dataTransfer.files.length == 1) {
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var file = event.dataTransfer.files[0];
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var fr = new FileReader();
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fr.addEventListener('load', function(frevent) {
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var textin = document.getElementById('textin');
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var textout = document.getElementById('textout');
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textin.value = frevent.target.result;
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textout.value = patchXML(frevent.target.result);
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textout.focus();
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textout.select();
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}, true);
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fr.readAsText(file);
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}
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}
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document.addEventListener('DOMContentLoaded', function(event) {
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document.getElementById('button').addEventListener('click', function(event) {
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var textin = document.getElementById('textin');
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var textout = document.getElementById('textout');
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textout.value = patchXML(textin.value);
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textout.focus();
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textout.select();
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}, true);
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document.body.addEventListener('dragover', function(event) {
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event.preventDefault();
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}, true);
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document.body.addEventListener('drop', function(event) {
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event.preventDefault();
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handleDrop(event);
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}, true);
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}, true);
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</script>
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</head>
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<body>
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<form><table><tr>
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<td>
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<label for="textin">Input (with encrypted sections)</label>
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<br />
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<textarea id="textin" name="textin" rows="10" cols="40" placeholder="Paste the text of your exported XML here (starts with <?xml version=...)"></textarea>
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</td>
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<td style="vertical-align: middle;">
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<button id="button">Decrypt →</button>
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</td>
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<td>
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<label for="textout">Output (decrypted)</label>
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<br />
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<textarea id="textout" name="textout" rows=10" cols="40" placeholder="Decrypted text will appear here"></textarea>
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</td>
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</tr></table></form>
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<div id="output">
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Drag a .L5X file onto this page, or open it in Notepad and paste its contents into the text box
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<br />
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</div>
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</body>
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</html>
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