Gadgetbridge/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/util/CryptoUtils.java

package nodomain.freeyourgadget.gadgetbridge.util;

import android.annotation.SuppressLint;

import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.SecretKeySpec;

public class CryptoUtils {
    public static byte[] encryptAES(byte[] value, byte[] secretKey) throws InvalidKeyException, NoSuchPaddingException, NoSuchAlgorithmException, BadPaddingException, IllegalBlockSizeException {
        @SuppressLint("GetInstance") Cipher ecipher = Cipher.getInstance("AES/ECB/NoPadding");
        SecretKeySpec newKey = new SecretKeySpec(secretKey, "AES");
        ecipher.init(Cipher.ENCRYPT_MODE, newKey);
        return ecipher.doFinal(value);
    }

    public static byte[] decryptAES(byte[] value, byte[] secretKey) throws InvalidKeyException, NoSuchPaddingException, NoSuchAlgorithmException, BadPaddingException, IllegalBlockSizeException {
        @SuppressLint("GetInstance") Cipher ecipher = Cipher.getInstance("AES/ECB/NoPadding");
        SecretKeySpec newKey = new SecretKeySpec(secretKey, "AES");
        ecipher.init(Cipher.DECRYPT_MODE, newKey);
        return ecipher.doFinal(value);
    }
}