AES using typescript

typescript_aes.ts

import { cipher, util } from "node-forge";
# npm i --save-dev @types/node-forge

const secretKey = "12a97d88d634afdf9f4da5bd35223f01";
const iv = "5bf11a0951fa";
  
# Doing encryption
const cipherGCM = cipher.createCipher("AES-GCM", this.secretKey);
cipherGCM.start({iv: this.iv});
cipherGCM.update(util.createBuffer("Test message"))
cipherGCM.finish();
let out = cipherGCM.output.getBytes();
let encodedEncryptedData = util.encode64(out);
console.log(encodedEncryptedData)

# Decrypt the message
const decipher  = cipher.createDecipher("AES-GCM", this.secretKey);
decipher.mode.tag = cipherGCM.mode.tag
decipher.start({iv: this.iv, tag: decipher.mode.tag});
out = util.decode64(encodedEncryptedData)
decipher.update(util.createBuffer(out))
var result = decipher.finish();
console.log(decipher.output)