Encrypt and Decrypt files using Node.js Crypto Stream - node.js

Question

I am making a Desktop application using Electron and react.js in which I have to encrypt and decrypt files (.txt, .pdf, .jpg, .png) using Crypto library.
I am using streams to do that.
So I just get the file from FileAPI and pass the file path to create readStream.
export function encrypt (passphrase) {
const crypto = require('crypto');
const fs = require('fs');
const cipher = crypto.createCipher('aes192', passphrase);
const input = fs.createReadStream(file_path);
const output = fs.createWriteStream('test.enc');
input.pipe(cipher).pipe(output);}
export function decrypt (passphrase) {
const crypto = require('crypto');
const fs = require('fs');
const cipher = crypto.createDecipher('aes192', passphrase);
const input = fs.createReadStream(file_path);
const output = fs.createWriteStream('test.pdf');}
input.pipe(cipher).pipe(output);
This code works fine for only for .txt files.
Any help to make this work for other file formats?

Answer 1

so here is a function that works.. just call on the function using 'data' in which ever format you need.. it seems best using strings or buffers.
function Encrypt_AES(data, pubkey) {
const algorithm = 'aes-192-cbc';
// Use the async `crypto.scrypt()` instead.
const key = crypto.scryptSync(pubkey, 'salt', 24);
// Use `crypto.randomBytes` to generate a random iv instead of the static iv
// shown here.
const iv = Buffer.alloc(16, 0); // Initialization vector.
const cipher = crypto.createCipheriv(algorithm, key, iv);
let encrypted = cipher.update(data, 'utf8', 'hex');
encrypted += cipher.final('hex');
return encrypted;
}
function Decrypt_AES(data, pubkey) {
const algorithm = 'aes-192-cbc';
// Use the async `crypto.scrypt()` instead.
const key = crypto.scryptSync(pubkey, 'salt', 24);
// The IV is usually passed along with the ciphertext.
const iv = Buffer.alloc(16, 0); // Initialization vector.
const decipher = crypto.createDecipheriv(algorithm, key, iv);
// Encrypted using same algorithm, key and iv.
let decrypted = decipher.update(data, 'hex', 'utf8');
decrypted += decipher.final('utf8');
return decrypted;
}