Secret Key Spec Cipher

encode_decode.java

import android.util.Base64;
import android.util.Log;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import javax.crypto.Cipher;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import pl.droidsonroids.gif.BuildConfig;

public class MCrypt {
    private static Cipher dcipher;
    private static Cipher ecipher;
    private static SecretKey key;

    public MCrypt() {
        try {
            key = new SecretKeySpec(FileManager.ReadByte(Lib.getUniquePsuedoID()), "AES");
            ecipher = Cipher.getInstance("AES");
            dcipher = Cipher.getInstance("AES");
            ecipher.init(1, key);
            dcipher.init(2, key);
        } catch (NoSuchAlgorithmException e) {
            Log.d("EncryptDecryptStringWithDES_Error", "No Such Algorithm:" + e.getMessage());
        } catch (NoSuchPaddingException e2) {
            Log.d("EncryptDecryptStringWithDES_Error", "No Such Padding:" + e2.getMessage());
        } catch (InvalidKeyException e3) {
            Log.d("EncryptDecryptStringWithDES_Error", "Invalid Key:" + e3.getMessage());
        }
    }

    public String encrypt(String str) {
        try {
            return Base64.encodeToString(ecipher.doFinal(str.getBytes("UTF8")), 0);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    public String decrypt(String str) {
        try {
            if (str.equals(BuildConfig.FLAVOR)) {
                return str;
            }
            return new String(dcipher.doFinal(Base64.decode(str, 0)), "UTF8");
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }
}