Added 'Disassemble x86' operation

.eslintrc.json

@@ -28,11 +28,7 @@
         // modify rules from base configurations
         "no-unused-vars": ["error", {
             "args": "none",
-            "vars": "local",
-            // Allow vars that start with a capital letter to be unused.
-            // This is mainly for exported module names which are useful to indicate
-            // the name of the module and may be used to refer to itself in future.
-            "varsIgnorePattern": "^[A-Z]"
+            "vars": "all"
         }],
         "no-empty": ["error", {
             "allowEmptyCatch": true

src/core/ChefWorker.js

@@ -92,7 +92,7 @@ async function bake(data) {
     } catch (err) {
         self.postMessage({
             action: "bakeError",
-            data: err.message
+            data: err
         });
     }
 }

src/core/config/Categories.js

@@ -300,6 +300,7 @@ const Categories = [
             "Frequency distribution",
             "Detect File Type",
             "Scan for Embedded Files",
+            "Disassemble x86",
             "Generate UUID",
             "Generate TOTP",
             "Generate HOTP",

src/core/config/OperationConfig.js

@@ -5,7 +5,6 @@ import BCD from "../operations/BCD.js";
 import BitwiseOp from "../operations/BitwiseOp.js";
 import ByteRepr from "../operations/ByteRepr.js";
 import CharEnc from "../operations/CharEnc.js";
-import Checksum from "../operations/Checksum.js";
 import Cipher from "../operations/Cipher.js";
 import Code from "../operations/Code.js";
 import Compress from "../operations/Compress.js";
@@ -26,21 +25,16 @@ import IP from "../operations/IP.js";
 import JS from "../operations/JS.js";
 import MAC from "../operations/MAC.js";
 import MorseCode from "../operations/MorseCode.js";
-import MS from "../operations/MS.js";
 import NetBIOS from "../operations/NetBIOS.js";
-import Numberwang from "../operations/Numberwang.js";
-import OS from "../operations/OS.js";
-import OTP from "../operations/OTP.js";
 import PublicKey from "../operations/PublicKey.js";
 import Punycode from "../operations/Punycode.js";
-import QuotedPrintable from "../operations/QuotedPrintable.js";
 import Rotate from "../operations/Rotate.js";
 import SeqUtils from "../operations/SeqUtils.js";
+import Shellcode from "../operations/Shellcode.js";
 import StrUtils from "../operations/StrUtils.js";
 import Tidy from "../operations/Tidy.js";
 import Unicode from "../operations/Unicode.js";
 import URL_ from "../operations/URL.js";
-import UUID from "../operations/UUID.js";
 
 
 /**
@@ -296,6 +290,44 @@ const OperationConfig = {
             }
         ]
     },
+    "Disassemble x86": {
+        module: "Shellcode",
+        description: "Disassembly is the process of translating machine language into assembly language.<br><br>This operation supports 64-bit, 32-bit and 16-bit code written for Intel or AMD x86 processors. It is particularly useful for reverse engineering shellcode.<br><br>Input should be in hexadecimal.",
+        inputType: "string",
+        outputType: "string",
+        args: [
+            {
+                name: "Bit mode",
+                type: "option",
+                value: Shellcode.MODE
+            },
+            {
+                name: "Compatibility",
+                type: "option",
+                value: Shellcode.COMPATIBILITY
+            },
+            {
+                name: "Code Segment (CS)",
+                type: "number",
+                value: 16
+            },
+            {
+                name: "Offset (IP)",
+                type: "number",
+                value: 0
+            },
+            {
+                name: "Show instruction hex",
+                type: "boolean",
+                value: true
+            },
+            {
+                name: "Show instruction position",
+                type: "boolean",
+                value: true
+            }
+        ]
+    },
     "XOR": {
         module: "Default",
         description: "XOR the input with the given key.<br>e.g. <code>fe023da5</code><br><br><strong>Options</strong><br><u>Null preserving:</u> If the current byte is 0x00 or the same as the key, skip it.<br><br><u>Scheme:</u><ul><li>Standard - key is unchanged after each round</li><li>Input differential - key is set to the value of the previous unprocessed byte</li><li>Output differential - key is set to the value of the previous processed byte</li></ul>",

src/core/config/modules/OpModules.js

@@ -18,6 +18,7 @@ import HTTPModule from "./HTTP.js";
 import ImageModule from "./Image.js";
 import JSBNModule from "./JSBN.js";
 import PublicKeyModule from "./PublicKey.js";
+import ShellcodeModule from "./Shellcode.js";
 
 Object.assign(
     OpModules,
@@ -31,7 +32,8 @@ Object.assign(
     HTTPModule,
     ImageModule,
     JSBNModule,
-    PublicKeyModule
+    PublicKeyModule,
+    ShellcodeModule
 );
 
 export default OpModules;

src/core/config/modules/Shellcode.js

@@ -0,0 +1,20 @@
+import Shellcode from "../../operations/Shellcode.js";
+
+
+/**
+ * Shellcode module.
+ *
+ * Libraries:
+ *  - DisassembleX86-64.js
+ *
+ * @author n1474335 [n1474335@gmail.com]
+ * @copyright Crown Copyright 2017
+ * @license Apache-2.0
+ */
+let OpModules = typeof self === "undefined" ? {} : self.OpModules || {};
+
+OpModules.Shellcode = {
+    "Disassemble x86": Shellcode.runDisassemble,
+};
+
+export default OpModules;

src/core/operations/ByteRepr.js

@@ -1,4 +1,3 @@
-/* globals app */
 import Utils from "../Utils.js";
 
 

src/core/operations/CharEnc.js

@@ -1,6 +1,4 @@
 import cptable from "../lib/js-codepage/cptable.js";
-import Utils from "../Utils.js";
-import CryptoJS from "crypto-js";
 
 
 /**

src/core/operations/Hexdump.js

@@ -1,4 +1,3 @@
-/* globals app */
 import Utils from "../Utils.js";
 
 

src/core/operations/Shellcode.js

@@ -0,0 +1,96 @@
+import disassemble from "../lib/DisassembleX86-64.js";
+
+
+/**
+ * Shellcode operations.
+ *
+ * @author n1474335 [n1474335@gmail.com]
+ * @copyright Crown Copyright 2017
+ * @license Apache-2.0
+ *
+ * @namespace
+ */
+const Shellcode = {
+
+    /**
+     * @constant
+     * @default
+     */
+    MODE: ["64", "32", "16"],
+    /**
+     * @constant
+     * @default
+     */
+    COMPATIBILITY: [
+        "Full x86 architecture",
+        "Knights Corner",
+        "Larrabee",
+        "Cyrix",
+        "Geode",
+        "Centaur",
+        "X86/486"
+    ],
+
+    /**
+     * Disassemble x86 operation.
+     *
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    runDisassemble: function(input, args) {
+        const mode = args[0],
+            compatibility = args[1],
+            codeSegment = args[2],
+            offset = args[3],
+            showInstructionHex = args[4],
+            showInstructionPos = args[5];
+
+        switch (mode) {
+            case "64":
+                disassemble.setBitMode(2);
+                break;
+            case "32":
+                disassemble.setBitMode(1);
+                break;
+            case "16":
+                disassemble.setBitMode(0);
+                break;
+            default:
+                throw "Invalid mode value";
+        }
+
+        switch (compatibility) {
+            case "Full x86 architecture":
+                disassemble.CompatibilityMode(0);
+                break;
+            case "Knights Corner":
+                disassemble.CompatibilityMode(1);
+                break;
+            case "Larrabee":
+                disassemble.CompatibilityMode(2);
+                break;
+            case "Cyrix":
+                disassemble.CompatibilityMode(3);
+                break;
+            case "Geode":
+                disassemble.CompatibilityMode(4);
+                break;
+            case "Centaur":
+                disassemble.CompatibilityMode(5);
+                break;
+            case "X86/486":
+                disassemble.CompatibilityMode(6);
+                break;
+        }
+
+        disassemble.SetBasePosition(codeSegment + ":" + offset);
+        disassemble.setShowInstructionHex(showInstructionHex);
+        disassemble.setShowInstructionPos(showInstructionPos);
+        disassemble.LoadBinCode(input.replace(/\s/g, ""));
+        return disassemble.LDisassemble();
+    },
+
+};
+
+export default Shellcode;

src/node/index.js

@@ -9,7 +9,7 @@ require("babel-polyfill");
 
 const Chef = require("../core/Chef.js").default;
 
-const CyberChef = module.exports = {
+const CyberChef = {
 
     bake: function(input, recipeConfig) {
         this.chef = new Chef();
@@ -23,3 +23,5 @@ const CyberChef = module.exports = {
     }
 
 };
+
+module.exports = CyberChef;