1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18 /** 19 * @author Boris V. Kuznetsov 20 * @version $Revision$ 21 */ 22 23 package javax.crypto; 24 25 import java.security.InvalidKeyException; 26 import java.security.Key; 27 import java.security.SecureRandom; 28 import org.apache.harmony.crypto.internal.NullCipherSpi; 29 30 31 /** 32 * This class provides an identity cipher that does not transform the input data 33 * in any way. The <i>encrypted</i> data is identical to the <i>plain text</i>. 34 */ 35 public class NullCipher extends Cipher { 36 37 /** 38 * Creates a new {@code NullCipher} instance. 39 */ NullCipher()40 public NullCipher() { 41 super(new NullCipherSpi(), null, null); 42 try { 43 this.init(Cipher.ENCRYPT_MODE, (Key)null, (SecureRandom)null); 44 } catch (InvalidKeyException e) { 45 } 46 } 47 48 } 49