mirror of https://github.com/gchq/CyberChef.git
85 lines
2.5 KiB
JavaScript
85 lines
2.5 KiB
JavaScript
/**
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* @author sganson@trustedsecurity.com]
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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 {fromBase94} from "../lib/Base94.mjs";
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/**
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* From Base94 operation
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*/
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class FromBase94 extends Operation {
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/**
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* FromBase94 constructor
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*/
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constructor() {
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super();
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this.name = "From Base94";
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this.module = "Default";
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this.description = "Base94 is a notation for encoding arbitrary byte data using a restricted set of symbols and is found primarily in the finance/ATM technology space.<br/><br/>This operation decodes an ASCII Base94 string returning a byteArray.<br/><br/>e.g. <code>@Z<[+/- >5$@3z&T!Qh*|F.q+ZWIz&#J<[+][[4+trr# </code> becomes <code>[48, 65, 6c, 6c, 6f, 20, 57, 6f, 72, 6c, 64, 21]</code><br/><br/>This is a no frills, no soft toilet paper implementation. It's string in, byteArray out.<br/><br/>By default, input length is expected to by a multiple of 5. Unchecking 'Strict length' will pad non mod 5 length input with space(s).<br/><br/>Base94 encoded content is expected to be in ASCII range '0x20 thru 0x7e'. Leaving 'Remove Invalid Chars' unchecked will enforce this.";
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this.inputType = "string";
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this.outputType = "byteArray";
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this.args = [
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{
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name: "Strict length",
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type: "boolean",
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value: true
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},
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{
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name: "Remove Invalid Chars",
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type: "boolean",
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value: false
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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 {byteArray}
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*/
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run(input, args) {
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const [strictLength, removeInvalidChars] = args;
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return fromBase94(input, strictLength, removeInvalidChars);
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}
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/**
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* Highlight to Base94
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*
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* @param {Object[]} pos
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* @param {number} pos[].start
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* @param {number} pos[].end
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* @param {Object[]} args
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* @returns {Object[]} pos
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*/
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highlight(pos, args) {
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pos[0].start = Math.ceil(pos[0].start / 4 * 5);
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pos[0].end = Math.floor(pos[0].end / 4 * 5);
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return pos;
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}
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/**
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* Highlight from Base94
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*
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* @param {Object[]} pos
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* @param {number} pos[].start
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* @param {number} pos[].end
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* @param {Object[]} args
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* @returns {Object[]} pos
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*/
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highlightReverse(pos, args) {
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pos[0].start = Math.floor(pos[0].start / 5 * 4);
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pos[0].end = Math.ceil(pos[0].end / 5 * 4);
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return pos;
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}
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}
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export default FromBase94;
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