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NodeJS DES ECB Encryption Of Hex Data With Module 'crypto'

I am trying to encrypt/decrypt hex data using node js module 'crypto' with DES-ECB algorithm. In the official 'crypto' documentation, they give an example of aes-192 encryption in CBC mode (cf attached code) but with the ECB mode no iv (initilization vector) is needed. I don't know how to adapt this code to encrypt in ECB mode with the DES algorithm.

Here's the JavaScript code given in the official documentation of node js 'crypto' module (https://nodejs.org/dist/latest-v10.x/docs/api/crypto.html#crypto_class_cipher):

const crypto = require('crypto');

const algorithm = 'aes-192-cbc';
const password = 'Password used to generate key';
// Key length is dependent on the algorithm. In this case for aes192, it is
// 24 bytes (192 bits).
// Use async `crypto.scrypt()` instead.
const key = crypto.scryptSync(password, '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.on('readable', () => {
  let chunk;
  while (null !== (chunk = cipher.read())) {
    encrypted += chunk.toString('hex');
  }
});
cipher.on('end', () => {
  console.log(encrypted);
  // Prints: e5f79c5915c02171eec6b212d5520d44480993d7d622a7c4c2da32f6efda0ffa
});

cipher.write('some clear text data');
cipher.end();

In my case I have to change the "algorithm" field to:

const algorithm = 'des-ecb'

But then I also have to adapt the parts dealing with the iv (as no iv is needed with DES-ECB algorithm) and I don't know how to do that...

Thanks a lot!

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Answer

You can try this approach, this should do what you want:

const crypto = require('crypto');
const algorithm = 'des-ecb';
const password = 'some password';
// use a hex key here
const key = Buffer.from("d0e276d0144890d3", "hex");

const cipher = crypto.createCipheriv(algorithm, key, null);
let encrypted = cipher.update("Those are my principles, and if you don't like them... well, I have others.", 'utf8', 'hex');
encrypted += cipher.final('hex');
console.log("Encrypted: ", encrypted);

const decipher = crypto.createDecipheriv(algorithm, key, null);
let decrypted = decipher.update(encrypted, 'hex', 'utf8');
decrypted += decipher.final('utf8');
console.log("Decrypted: ", decrypted);
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source: stackoverflow.com
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