while i used to encrypt string and decrypt in outystems it getting good while i tried to encrypt json and trying to decrypt getting error

tool links :  

       https://www.devglan.com/online-tools/aes-encryption-decryption 

                   https://www.javainuse.com/aesgenerator

from these two links getting that error while i decrypting json why? is it my fault

i uses aes encryption service not crypto api in outystems

Is the same secret key used to encrypt and decrypt?

yes can i post

getting same error can u tried once

Please share your OML file.

padding is invalid and cannot be removed  getting for json files can u once check it 

where using another website it working properly can u write encryption code for this?

here intilization vector is optional while implementing code and using that it getting same error how to fix intilization vector in aes operations can u plz tell or can we write code in cbc with out using intlization vector

Yes, you can use it without passing initialization vector, as shown in screenshot.

how to write code for encryption with out using intilization vector is it mandatory in cbc right

You can write code for encryption without using IV ( initialization vector). the library used in extension provide the default value for IV internally.

I hope this answers your question. 

const crypto = require('crypto');

function encrypt(plaintext, key) {

  const cipher = crypto.createCipher('aes-256-cbc', key);

  let encrypted = cipher.update(plaintext, 'utf8', 'hex');

  encrypted += cipher.final('hex');

  return encrypted;

}

function decrypt(encryptedData, key) {

  const decipher = crypto.createDecipher('aes-256-cbc', key);

  let decrypted = decipher.update(encryptedData, 'hex', 'utf8');

  decrypted += decipher.final('utf8');

  return decrypted;

}

// Example usage

const data = {

  message: "secret message"

};

const plaintext = JSON.stringify(data);

const key = crypto.randomBytes(32).toString('hex');

const encrypted = encrypt(plaintext, key);

const decrypted = decrypt(encrypted, key);

console.log(plaintext === decrypted); 

i use this code but getting same error

plz check it

while decrypting getting this like in starting