mirror of https://github.com/gchq/CyberChef.git
71 lines
1.6 KiB
JavaScript
71 lines
1.6 KiB
JavaScript
/**
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* NetBIOS operations.
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*
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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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* @namespace
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*/
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const NetBIOS = {
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/**
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* @constant
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* @default
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*/
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OFFSET: 65,
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/**
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* Encode NetBIOS Name operation.
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*
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* @param {byteArray} input
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* @param {Object[]} args
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* @returns {byteArray}
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*/
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runEncodeName: function(input, args) {
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let output = [],
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offset = args[0];
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if (input.length <= 16) {
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let len = input.length;
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input.length = 16;
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input.fill(32, len, 16);
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for (let i = 0; i < input.length; i++) {
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output.push((input[i] >> 4) + offset);
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output.push((input[i] & 0xf) + offset);
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}
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}
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return output;
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},
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/**
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* Decode NetBIOS Name operation.
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*
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* @param {byteArray} input
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* @param {Object[]} args
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* @returns {byteArray}
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*/
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runDecodeName: function(input, args) {
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let output = [],
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offset = args[0];
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if (input.length <= 32 && (input.length % 2) === 0) {
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for (let i = 0; i < input.length; i += 2) {
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output.push((((input[i] & 0xff) - offset) << 4) |
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(((input[i + 1] & 0xff) - offset) & 0xf));
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}
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for (let i = output.length - 1; i > 0; i--) {
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if (output[i] === 32) output.splice(i, i);
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else break;
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}
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}
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return output;
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},
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};
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export default NetBIOS;
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