Package javax.crypto

Examples of javax.crypto.Cipher

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    public static byte[] decrypt( byte[] text, PrivateKey key )
        throws Exception
    {
        byte[] dectyptedText = null;
        Cipher cipher = Cipher.getInstance( "RSA/ECB/PKCS1Padding" );
        cipher.init( Cipher.DECRYPT_MODE, key );
        dectyptedText = cipher.doFinal( text );
        return dectyptedText;
    }
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    final private static String xform = "RSA/NONE/PKCS1Padding";
    final private static String algorithm = "RSA";

    public static byte[] encrypt(byte[] inpBytes, PublicKey key) throws Exception {

        Cipher cipher = Cipher.getInstance(xform);
        cipher.init(Cipher.ENCRYPT_MODE, key);
        return cipher.doFinal(inpBytes);
    }
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        return cipher.doFinal(inpBytes);
    }

    public static byte[] decrypt(byte[] inpBytes, PrivateKey key) throws Exception {

        Cipher cipher = Cipher.getInstance(xform);
        cipher.init(Cipher.DECRYPT_MODE, key);
        return cipher.doFinal(inpBytes);
    }
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     * @throws JSONException
     */
    private String decrypt(JSONArray jsonArray) throws IllegalBlockSizeException,
            BadPaddingException, UnsupportedEncodingException, InvalidKeyException,
            NoSuchAlgorithmException, NoSuchPaddingException, InvalidAlgorithmParameterException, InvalidKeySpecException, JSONException {
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        cipher.init(Cipher.DECRYPT_MODE, getCiperKey(Base64.decodeBase64(jsonArray.getString(0).getBytes("UTF-8"))), new IvParameterSpec(Base64.decodeBase64(jsonArray.getString(1).getBytes("UTF-8"))));
        return new String(cipher.doFinal(Base64.decodeBase64(jsonArray.getString(2).getBytes("UTF-8"))));
    }
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     * @throws InvalidParameterSpecException
     */
    private List<String> encrypt(String payload) throws IllegalBlockSizeException,
            BadPaddingException, UnsupportedEncodingException, InvalidKeyException,
            NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeySpecException, InvalidParameterSpecException {
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        byte[] salt = new byte[9];
        random.nextBytes(salt);
        cipher.init(Cipher.ENCRYPT_MODE, getCiperKey(salt));
        AlgorithmParameters params = cipher.getParameters();
        List<String> encrypted = new ArrayList<String>();
        encrypted.add(new String(Base64.encodeBase64(salt)));
        encrypted.add(new String(Base64.encodeBase64(params.getParameterSpec(IvParameterSpec.class).getIV())));
        encrypted.add(new String(Base64.encodeBase64(cipher.doFinal(payload.getBytes("UTF-8")))));
        return encrypted;
    }
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      {
         System.out.println("Checking: "+encodePermission);
         sm.checkPermission(encodePermission);
      }

      Cipher cipher = Cipher.getInstance(cipherAlgorithm);
      cipher.init(Cipher.ENCRYPT_MODE, cipherKey, cipherSpec);
      byte[] encoding = cipher.doFinal(secret);
      return encoding;
   }
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   {
      SecurityManager sm = System.getSecurityManager();
      if( sm != null )
         sm.checkPermission(decodePermission);

      Cipher cipher = Cipher.getInstance(cipherAlgorithm);
      cipher.init(Cipher.DECRYPT_MODE, cipherKey, cipherSpec);
      byte[] decode = cipher.doFinal(secret);
      return decode;
   }
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{
   public static byte[] encode(byte[] secret, String cipherAlgorithm,
      SecretKey cipherKey, PBEParameterSpec cipherSpec)
      throws Exception
   {
      Cipher cipher = Cipher.getInstance(cipherAlgorithm);
      cipher.init(Cipher.ENCRYPT_MODE, cipherKey, cipherSpec);
      byte[] encoding = cipher.doFinal(secret);
      return encoding;
   }
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   public static byte[] decode(byte[] secret, String cipherAlgorithm,
      SecretKey cipherKey, PBEParameterSpec cipherSpec)
      throws Exception
   {
      Cipher cipher = Cipher.getInstance(cipherAlgorithm);
      cipher.init(Cipher.DECRYPT_MODE, cipherKey, cipherSpec);
      byte[] decode = cipher.doFinal(secret);
      return decode;
   }
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    }
  }

  private static Cipher getCipher(Key key, int mode, byte[] parameters) {
    try {
      Cipher cipher = Cipher.getInstance(TYPE);
      cipher.init(mode, key, new IvParameterSpec(parameters));
      return cipher;
    } catch (Exception e) {
      String msg = "Unable to load key using transformation: " + TYPE;
      if (e instanceof InvalidKeyException) {
        try {
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