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icynet-admin/lib/utils/crypto.ts

48 lines
1.2 KiB
TypeScript

import crypto from 'crypto';
import { CLIENT_SECRET } from '../constants';
const IV_LENGTH = 16;
const ALGORITHM = 'aes-256-cbc';
export const generateString = (length: number): string =>
crypto.randomBytes(length).toString('hex').slice(0, length);
// https://stackoverflow.com/q/52212430
/**
* Symmetric encryption function
* @param value String to encrypt
* @returns Encrypted text
*/
export const encrypt = (value: string) => {
const iv = crypto.randomBytes(IV_LENGTH);
const cipher = crypto.createCipheriv(
ALGORITHM,
Buffer.from(CLIENT_SECRET, 'hex'),
iv
);
let encrypted = cipher.update(value);
encrypted = Buffer.concat([encrypted, cipher.final()]);
return `${iv.toString('hex')}:${encrypted.toString('hex')}`;
};
/**
* Symmetric decryption function
* @param text Encrypted string
* @returns Decrypted text
*/
export const decrypt = (text: string) => {
const [iv, encryptedText] = text
.split(':')
.map((part) => Buffer.from(part, 'hex'));
const decipher = crypto.createDecipheriv(
ALGORITHM,
Buffer.from(CLIENT_SECRET, 'hex'),
iv
);
let decrypted = decipher.update(encryptedText);
decrypted = Buffer.concat([decrypted, decipher.final()]);
return decrypted.toString();
};