"Error: Native crypto module could not be used to get secure random number." using cryptojs in jmeter

Question

I am using crypto-js-4.0.0 in jmeter on a JSR223 preprocessor (javascript ECMAScript 262 Edition 5.1):

load('C:/Users/hlopezgu/Downloads/crypto-js-4.0.0/crypto-js.js');

var key = 'secret key 123';
var textToEncrypt = '123456';
var encryptedText = CryptoJS.AES.encrypt(textToEncrypt, key).toString();

log.info("Texto cifrado: " + encryptedText);

I get the following response:

Error: Native crypto module could not be used to get secure random number

I need to use this library in jmeter to encrypt data from a json and be able to send it as POST to a web service

Answer 1

Instead of trying to run JavaScript in JMeter which is not recommended because:

1. Nashorn engine has been removed from OpenJDK 15 and onwards so your solution won't be future proof.
2. Your code will be interpreted each time and cryptographic operations are quite "heavy" so it's recommended to use Groovy language for scripting.

So I would recommend coming up with a proper secret key (which cannot be 14 bytes), checking out the algorithm and re-implementing it in Groovy. See Encryption and decryption with Groovy article for more details.