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Macide Celik 2019-10-29 08:13:54 +03:00 • committed by GitHub
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src/core/operations/DisassembleX86.mjs
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/**
* @author n1474335 [n1474335@gmail.com]
* @copyright Crown Copyright 2017
* @license Apache-2.0
*/
import Operation from "../Operation.mjs";
import * as disassemble from "../vendor/DisassembleX86-64.mjs";
import OperationError from "../errors/OperationError.mjs";
/**
* Disassemble x86 operation
*/
class DisassembleX86 extends Operation {
/**
* DisassembleX86 constructor
*/
constructor() {
super();
this.name = "Disassemble x86";
this.module = "Shellcode";
this.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.";
this.infoURL = "https://wikipedia.org/wiki/X86";
this.inputType = "string";
this.outputType = "string";
this.args = [
{
"name": "Bit mode",
"type": "option",
"value": ["64", "32", "16"]
},
{
"name": "Compatibility",
"type": "option",
"value": [
"Full x86 architecture",
"Knights Corner",
"Larrabee",
"Cyrix",
"Geode",
"Centaur",
"X86/486"
]
},
{
"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
}
];
}
/**
* @param {string} input
* @param {Object[]} args
* @returns {string}
*
* @throws {OperationError} if invalid mode value
*/
run(input, args) {
const [
mode,
compatibility,
codeSegment,
offset,
showInstructionHex,
showInstructionPos
] = args;
switch (mode) {
case "64":
disassemble.setBitMode(2);
break;
case "32":
disassemble.setBitMode(1);
break;
case "16":
disassemble.setBitMode(0);
break;
default:
throw new OperationError("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 DisassembleX86;