mirror of https://github.com/gchq/CyberChef.git
69 lines
2.0 KiB
JavaScript
69 lines
2.0 KiB
JavaScript
/**
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* @author n1474335 [n1474335@gmail.com]
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* @author cplussharp
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* @copyright Crown Copyright 2016
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* @license Apache-2.0
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*/
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import { fromBase64 } from "../lib/Base64.mjs";
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import { toHexFast } from "../lib/Hex.mjs";
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import Operation from "../Operation.mjs";
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import OperationError from "../errors/OperationError.mjs";
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/**
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* PEM to Hex operation
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*/
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class PEMToHex extends Operation {
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/**
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* PEMToHex constructor
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*/
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constructor() {
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super();
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this.name = "PEM to Hex";
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this.module = "Default";
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this.description = "Converts PEM (Privacy Enhanced Mail) format to a hexadecimal DER (Distinguished Encoding Rules) string.";
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this.infoURL = "https://wikipedia.org/wiki/Privacy-Enhanced_Mail#Format";
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this.inputType = "string";
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this.outputType = "string";
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this.args = [];
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this.checks = [
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{
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"pattern": "----BEGIN ([A-Z][A-Z ]+[A-Z])-----",
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"args": []
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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 output = [];
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let match;
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const regex = /-----BEGIN ([A-Z][A-Z ]+[A-Z])-----/g;
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while ((match = regex.exec(input)) !== null) {
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// find corresponding end tag
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const indexBase64 = match.index + match[0].length;
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const footer = `-----END ${match[1]}-----`;
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const indexFooter = input.indexOf(footer, indexBase64);
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if (indexFooter === -1) {
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throw new OperationError(`PEM footer '${footer}' not found`);
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}
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// decode base64 content
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const base64 = input.substring(indexBase64, indexFooter);
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const bytes = fromBase64(base64, "A-Za-z0-9+/=", "byteArray", true);
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const hex = toHexFast(bytes);
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output.push(hex);
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}
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return output.join("\n");
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}
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}
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export default PEMToHex;
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