Decrypting byte array (JAVA code to VB.NET code)

[wilbardmtei]

Hi guys,

I have this code for creating secret key and decrypting which is in JAVA and is running ok. I would like to implement it in the Robot so that I can generate report. Kindly assist, anyone with ideas on how to convert it to VB.NET

import org.apache.commons.codec.binary.Base64;
import java.security.Key;
import javax.crypto.Cipher;
import java.io.UnsupportedEncodingException;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
import java.security.MessageDigest;
import javax.crypto.spec.SecretKeySpec;

public class AESEncryptor
{
    private static SecretKeySpec secretKey;
    private static byte[] key;
    private static String key1;
    
    public static void setKey(final String myKey, final int iterations) {
        AESEncryptor.key1 = myKey.toString();
        MessageDigest sha = null;
        try {
            AESEncryptor.key = myKey.getBytes("UTF-8");
            sha = MessageDigest.getInstance("SHA-256");
            for (int i = 1; i <= iterations; ++i) {
                AESEncryptor.key = sha.digest(AESEncryptor.key);
            }
            AESEncryptor.key = Arrays.copyOf(AESEncryptor.key, 16);
            AESEncryptor.secretKey = new SecretKeySpec(AESEncryptor.key, "AES");
        }
        catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
        catch (UnsupportedEncodingException e2) {
            e2.printStackTrace();
        }
    }
    

    public static byte[] decrypt(final byte[] strToDecrypt) {
        try {
            final Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5PADDING");
            cipher.init(2, AESEncryptor.secretKey);
            return cipher.doFinal(strToDecrypt);
        }
        catch (Exception e) {
            System.out.println("Error while decrypting: " + e.toString());
            return null;
        }
    }
    


}

I would like to call the them by:

public static void main(String args){

        byte[] df = null;
            final byte[] decryptedData = "myEncryptedData";
            try {
                AESEncryptor.setKey("mysecretCode", 10);
                df = AESEncryptor.decrypt(decryptedData);
            }
            catch (Exception e) {
                e.printStackTrace();
            }
     }

Thanks in advance: @Yoichi

[J0ska]

Hid you try CodeTranslator: Code Translation From VB.NET <-> C# <-> TypeScript <-> Java

Cheers

[wilbardmtei]

Thanks @J0ska I will take a look at that.

[Yoichi]

HI,

For now, i wrote the following workflow. (But not tested.) Can you try this?

Sample20210625-1.zip (4.0 KB)

The following also helps you.

C# equivalent of the Java SecretKeySpec for AES

Regards,