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AES Encryption/Decryption in Node JS similar to Java

rated 0 times [ 0] [ 2] / answers: 1 / hits: 13779 / 4 Years ago, tue, february 18, 2020, 12:00:00

I am trying to replicate the Java code for AES Encryption and Decryption in Node JS.

Java Code

    SecretKeySpec skeySpec;

    String key = a4e1112f45e84f785358bb86ba750f48;



    public void encryptString(String key) throws Exception {

        try {

            skeySpec = new SecretKeySpec(key.getBytes(), AES);

            cipher = Cipher.getInstance(AES);

            cipher.init(1, skeySpec);

            byte encstr[] = cipher.doFinal(message.getBytes());

            String encData = new String(encstr, UTF-8);

            System.out.println(encData);

        } catch (NoSuchAlgorithmException nsae) {

            throw new Exception(Invalid Java Version);

        } catch (NoSuchPaddingException nse) {

            throw new Exception(Invalid Key);

        }

    }

Node JS

    var encryptKey = function (text) {

        var cipher = crypto.createCipher('aes256', 'a4e1112f45e84f785358bb86ba750f48');

        var crypted = cipher.update(text,'utf8', 'hex')

        crypted += cipher.final('hex');

        console.log(crypted);

        return crypted;

    }

I am unable to get the exact cipher-text in Node JS, which i am getting in Java.

Answers

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janettejordynm

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answered 4 Years ago jananauticat · Accepted Answer

Finally after reviewing Java Docs and Node JS Crypto Docs managed to get the result.
We have to use crypto.createCipheriv() instead of crypto.createCipher with a iv.
Here iv will be null.

Code :

    let crypto = require('crypto');



    var iv = new Buffer.from('');   //(null) iv 

    var algorithm = 'aes-256-ecb';

    var password = 'a4e1112f45e84f785358bb86ba750f48';      //key password for cryptography



    function encrypt(buffer){

        var cipher = crypto.createCipheriv(algorithm,new Buffer(password),iv)

        var crypted = Buffer.concat([cipher.update(buffer),cipher.final()]);

        return crypted;

    }



    console.log(encrypt(new Buffer('TextToEncrypt')).toString())