mirror of https://github.com/gchq/CyberChef.git
94 lines
3.0 KiB
JavaScript
94 lines
3.0 KiB
JavaScript
/**
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* @author n1474335 [n1474335@gmail.com]
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* @copyright Crown Copyright 2017
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* @license Apache-2.0
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*/
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import Operation from "../Operation.mjs";
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import BigNumber from "bignumber.js";
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import OperationError from "../errors/OperationError.mjs";
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/**
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* UNIX Timestamp to Windows Filetime operation
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*/
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class UNIXTimestampToWindowsFiletime extends Operation {
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/**
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* UNIXTimestampToWindowsFiletime constructor
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*/
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constructor() {
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super();
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this.name = "UNIX Timestamp to Windows Filetime";
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this.module = "Default";
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this.description = "Converts a UNIX timestamp to a Windows Filetime value.<br><br>A Windows Filetime is a 64-bit value representing the number of 100-nanosecond intervals since January 1, 1601 UTC.<br><br>A UNIX timestamp is a 32-bit value representing the number of seconds since January 1, 1970 UTC (the UNIX epoch).<br><br>This operation also supports UNIX timestamps in milliseconds, microseconds and nanoseconds.";
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this.infoURL = "https://msdn.microsoft.com/en-us/library/windows/desktop/ms724284(v=vs.85).aspx";
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this.inputType = "string";
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this.outputType = "string";
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this.args = [
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{
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"name": "Input units",
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"type": "option",
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"value": ["Seconds (s)", "Milliseconds (ms)", "Microseconds (μs)", "Nanoseconds (ns)"]
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},
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{
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"name": "Output format",
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"type": "option",
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"value": ["Decimal", "Hex (big endian)", "Hex (little endian)"]
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}
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];
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}
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/**
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* @param {string} input
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* @param {Object[]} args
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* @returns {string}
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*/
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run(input, args) {
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const [units, format] = args;
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if (!input) return "";
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input = new BigNumber(input);
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if (units === "Seconds (s)") {
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input = input.multipliedBy(new BigNumber("10000000"));
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} else if (units === "Milliseconds (ms)") {
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input = input.multipliedBy(new BigNumber("10000"));
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} else if (units === "Microseconds (μs)") {
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input = input.multipliedBy(new BigNumber("10"));
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} else if (units === "Nanoseconds (ns)") {
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input = input.dividedBy(new BigNumber("100"));
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} else {
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throw new OperationError("Unrecognised unit");
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}
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input = input.plus(new BigNumber("116444736000000000"));
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let result;
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if (format.startsWith("Hex")) {
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result = input.toString(16);
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} else {
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result = input.toFixed();
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}
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if (format === "Hex (little endian)") {
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// Swap endianness
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let flipped = "";
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for (let i = result.length - 2; i >= 0; i -= 2) {
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flipped += result.charAt(i);
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flipped += result.charAt(i + 1);
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}
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if (result.length % 2 !== 0) {
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flipped += "0" + result.charAt(0);
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}
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result = flipped;
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}
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return result;
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}
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}
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export default UNIXTimestampToWindowsFiletime;
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