content: package com.amnesica.kryptey.inputmethod.crypto;
  
  import android.util.Base64;
  
  import java.nio.charset.StandardCharsets;
  import java.security.Key;
  
  import javax.crypto.Cipher;
  import javax.crypto.spec.SecretKeySpec;
  
  @Deprecated
  // Basic AES encryption class for testing
  public class AESCrypt {
    private static final String ALGORITHM = "AES";
  
    public static String encrypt(CharSequence value, CharSequence password) throws Exception {
      Key key = generateKey(password);
      Cipher cipher = Cipher.getInstance(AESCrypt.ALGORITHM);
      cipher.init(Cipher.ENCRYPT_MODE, key);
      byte[] encryptedByteValue = cipher.doFinal(value.toString().getBytes(StandardCharsets.UTF_8));
      return Base64.encodeToString(encryptedByteValue, Base64.DEFAULT);
    }
  
    public static String decrypt(CharSequence value, CharSequence password) throws Exception {
      Key key = generateKey(password);
      Cipher cipher = Cipher.getInstance(AESCrypt.ALGORITHM);
      cipher.init(Cipher.DECRYPT_MODE, key);
      byte[] decryptedValue64 = Base64.decode(value.toString(), Base64.DEFAULT);
      byte[] decryptedByteValue = cipher.doFinal(decryptedValue64);
      return new String(decryptedByteValue, StandardCharsets.UTF_8);
    }
  
    private static Key generateKey(final CharSequence password) {
      Key key = new SecretKeySpec(password.toString().getBytes(), AESCrypt.ALGORITHM);
      return key;
    }
  }