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