Convert Java code to NodeJS - Encryption method

Question

I want to duplicate the JAVA encryption code in NodeJS.

private String DEFAULT_KEY = "abcdwAYserXbzcSeqL/zPg==";
private String text = "abc";
Base64 base64decoder = new Base64();
byte[] raw = base64decoder.decode(key);

SecretKeySpec fSecretKeySpec = new SecretKeySpec(raw, "AES");

Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.ENCRYPT_MODE, fSecretKeySpec);
byte[] encrypted = cipher.doFinal(text.getBytes());

Base64 base64encoder = new Base64();
result = base64encoder.encodeToString(encrypted);
System.out.println("result: "+ result);

The above code generate the encrypted code as: ZkojvMTW+9EEK0owxMuA7A==

I have tried few ways in NodeJS. It is not generating same code for me.

I have tried the following code.

var bKey = new Buffer('abcdwAYserXbzcSeqL/zPg==', 'base64');
var cipher = crypto.createCipher('aes-128-ecb',bKey);
//cipher.setAutoPadding(auto_padding=false);
var crypted = cipher.update('abc',null,'base64');
crypted+=cipher.final('base64');
console.log(crypted);

Can someone help me out?

What have you tried? Stackoverflow is a community that will help but you most show some code or things you have tried. — Jeff Sloyer
– Jeff Sloyer, Commented Jul 22, 2015 at 12:44
@JeffSloyer - This is the one way I have tried. var bKey = new Buffer('abcdwAYserXbzcSeqL/zPg==', 'base64'); var cipher = crypto.createCipher('aes-128-ecb',bKey); var encrypted = cipher.update('xls', 'base64', 'base64') + cipher.final('base64') — Mugu
– Mugu, Commented Jul 22, 2015 at 14:48
@JeffSloyer Thanks. I have tried with AES 128 bit used in java. So I used 'aes-128-ecb' first in nodejs code.Then I have tried with all available ciphers in the NodeJS through the following code 'var chipers = crypto.getCiphers(); for (var i = 0; i < chipers.length; i++) { //Encryption method }' None of the ciphers gave the same result as JAVA. Please help me to identify the issue in NodeJS code. — Mugu
– Mugu, Commented Jul 22, 2015 at 15:02

Maarten Bodewes · Accepted Answer · 2015-07-22 21:50:28Z

1

You probably are running into the issue that createCipher with two arguments takes a password, not a key. This password is first run through a key derivation function before it becomes a key.

Try to use the createCipheriv method instead, using any value for the IV. ECB mode doesn't take an IV, but at least you would be using a key instead of a password.

answered Jul 22, 2015 at 21:50

Maarten Bodewes

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