60 lines
1.3 KiB
JavaScript
60 lines
1.3 KiB
JavaScript
//crypt.js
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/**
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* Module for encrypting and decrypting strings.
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* @module crypt
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* @author Bram van der Veen <96aa48@gmail.com>
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*/
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//Import first-party modules.
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const crypto = require('crypto');
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//Import self-written modules.
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const config = require('./configuration');
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//Set local constants.
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const encoding = 'utf8';
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const cryptEncoding = 'hex';
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const algo = 'aes192';
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const passwd = config().encryptionKey;
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/**
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* Function for encrypting a string.
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* @param {String} str - String that you want to encrypt.
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* @return {String} encryptArray - Encrypted string.
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*/
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function encrypt(str) {
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let cipher = crypto.createCipher(algo, passwd);
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let encryptArray = [];
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encryptArray.push(cipher.update(str, encoding, cryptEncoding));
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encryptArray.push(cipher.final(cryptEncoding));
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return encryptArray.join('');
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}
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/**
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* Function to decrypt a string.
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* @param {String} str - String you want to decrypt
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* @return {String} The decrypted string.
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*/
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function decrypt(str) {
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let decipher = crypto.createDecipher(algo, passwd);
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let decryptArray = [];
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try {
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decryptArray.push(decipher.update(str, cryptEncoding, encoding));
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decryptArray.push(decipher.final(encoding));
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return decryptArray.join('');
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}
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catch (err) {
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return str.join('');
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}
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}
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//Export the functions as a module.
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module.exports = {
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'encrypt': encrypt,
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'decrypt': decrypt
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}
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