151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski/* 251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Copyright (c) 1997, 2007, Oracle and/or its affiliates. All rights reserved. 351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * This code is free software; you can redistribute it and/or modify it 651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * under the terms of the GNU General Public License version 2 only, as 751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * published by the Free Software Foundation. Oracle designates this 851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * particular file as subject to the "Classpath" exception as provided 951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * by Oracle in the LICENSE file that accompanied this code. 1051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 1151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * This code is distributed in the hope that it will be useful, but WITHOUT 1251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * version 2 for more details (a copy is included in the LICENSE file that 1551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * accompanied this code). 1651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 1751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * You should have received a copy of the GNU General Public License version 1851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 2 along with this work; if not, write to the Free Software Foundation, 1951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 2051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 2151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 2251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * or visit www.oracle.com if you need additional information or have any 2351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * questions. 2451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 2551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 2651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebskipackage javax.crypto; 2751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 2851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebskiimport java.io.*; 2951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 3051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski/** 3151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * A CipherOutputStream is composed of an OutputStream and a Cipher so 3251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * that write() methods first process the data before writing them out 3351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * to the underlying OutputStream. The cipher must be fully 3451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * initialized before being used by a CipherOutputStream. 3551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 3651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * <p> For example, if the cipher is initialized for encryption, the 3751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * CipherOutputStream will attempt to encrypt data before writing out the 3851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * encrypted data. 3951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 4051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * <p> This class adheres strictly to the semantics, especially the 4151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * failure semantics, of its ancestor classes 4251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * java.io.OutputStream and java.io.FilterOutputStream. This class 4351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * has exactly those methods specified in its ancestor classes, and 4451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * overrides them all. Moreover, this class catches all exceptions 4551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * that are not thrown by its ancestor classes. 4651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 4751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * <p> It is crucial for a programmer using this class not to use 4851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * methods that are not defined or overriden in this class (such as a 4951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * new method or constructor that is later added to one of the super 5051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * classes), because the design and implementation of those methods 5151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * are unlikely to have considered security impact with regard to 5251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * CipherOutputStream. 5351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 5451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @author Li Gong 5551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @see java.io.OutputStream 5651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @see java.io.FilterOutputStream 5751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @see javax.crypto.Cipher 5851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @see javax.crypto.CipherInputStream 5951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 6051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @since 1.4 6151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 6251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 6351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebskipublic class CipherOutputStream extends FilterOutputStream { 6451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 6551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski // the cipher engine to use to process stream data 6651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski private Cipher cipher; 6751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 6851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski // the underlying output stream 6951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski private OutputStream output; 7051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 7151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski /* the buffer holding one byte of incoming data */ 7251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski private byte[] ibuffer = new byte[1]; 7351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 7451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski // the buffer holding data ready to be written out 7551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski private byte[] obuffer; 7651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 7751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski /** 7851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 7951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Constructs a CipherOutputStream from an OutputStream and a 8051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Cipher. 8151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * <br>Note: if the specified output stream or cipher is 8251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * null, a NullPointerException may be thrown later when 8351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * they are used. 8451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 8551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @param os the OutputStream object 8651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @param c an initialized Cipher object 8751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 8851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski public CipherOutputStream(OutputStream os, Cipher c) { 8951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski super(os); 9051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski output = os; 9151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski cipher = c; 9251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski }; 9351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 9451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski /** 9551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Constructs a CipherOutputStream from an OutputStream without 9651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * specifying a Cipher. This has the effect of constructing a 9751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * CipherOutputStream using a NullCipher. 9851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * <br>Note: if the specified output stream is null, a 9951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * NullPointerException may be thrown later when it is used. 10051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 10151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @param os the OutputStream object 10251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 10351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski protected CipherOutputStream(OutputStream os) { 10451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski super(os); 10551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski output = os; 10651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski cipher = new NullCipher(); 10751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 10851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 10951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski /** 11051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Writes the specified byte to this output stream. 11151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 11251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @param b the <code>byte</code>. 11351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @exception IOException if an I/O error occurs. 11451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @since JCE1.2 11551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 11651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski public void write(int b) throws IOException { 11751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski ibuffer[0] = (byte) b; 11851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski obuffer = cipher.update(ibuffer, 0, 1); 11951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski if (obuffer != null) { 12051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski output.write(obuffer); 12151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski obuffer = null; 12251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 12351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski }; 12451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 12551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski /** 12651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Writes <code>b.length</code> bytes from the specified byte array 12751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * to this output stream. 12851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * <p> 12951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * The <code>write</code> method of 13051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * <code>CipherOutputStream</code> calls the <code>write</code> 13151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * method of three arguments with the three arguments 13251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * <code>b</code>, <code>0</code>, and <code>b.length</code>. 13351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 13451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @param b the data. 13551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @exception NullPointerException if <code>b</code> is null. 13651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @exception IOException if an I/O error occurs. 13751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @see javax.crypto.CipherOutputStream#write(byte[], int, int) 13851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @since JCE1.2 13951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 14051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski public void write(byte b[]) throws IOException { 14151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski write(b, 0, b.length); 14251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 14351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 14451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski /** 14551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Writes <code>len</code> bytes from the specified byte array 14651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * starting at offset <code>off</code> to this output stream. 14751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 14851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @param b the data. 14951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @param off the start offset in the data. 15051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @param len the number of bytes to write. 15151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @exception IOException if an I/O error occurs. 15251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @since JCE1.2 15351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 15451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski public void write(byte b[], int off, int len) throws IOException { 15551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski obuffer = cipher.update(b, off, len); 15651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski if (obuffer != null) { 15751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski output.write(obuffer); 15851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski obuffer = null; 15951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 16051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 16151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 16251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski /** 16351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Flushes this output stream by forcing any buffered output bytes 16451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * that have already been processed by the encapsulated cipher object 16551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * to be written out. 16651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 16751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * <p>Any bytes buffered by the encapsulated cipher 16851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * and waiting to be processed by it will not be written out. For example, 16951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * if the encapsulated cipher is a block cipher, and the total number of 17051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * bytes written using one of the <code>write</code> methods is less than 17151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * the cipher's block size, no bytes will be written out. 17251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 17351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @exception IOException if an I/O error occurs. 17451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @since JCE1.2 17551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 17651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski public void flush() throws IOException { 17751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski if (obuffer != null) { 17851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski output.write(obuffer); 17951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski obuffer = null; 18051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 18151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski output.flush(); 18251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 18351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 18451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski /** 18551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Closes this output stream and releases any system resources 18651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * associated with this stream. 18751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * <p> 18851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * This method invokes the <code>doFinal</code> method of the encapsulated 18951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * cipher object, which causes any bytes buffered by the encapsulated 19051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * cipher to be processed. The result is written out by calling the 19151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * <code>flush</code> method of this output stream. 19251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * <p> 19351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * This method resets the encapsulated cipher object to its initial state 19451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * and calls the <code>close</code> method of the underlying output 19551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * stream. 19651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 19751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @exception IOException if an I/O error occurs. 19851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @since JCE1.2 19951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 20051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski public void close() throws IOException { 20151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski try { 20251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski obuffer = cipher.doFinal(); 20351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } catch (IllegalBlockSizeException e) { 20451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski obuffer = null; 20551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } catch (BadPaddingException e) { 20651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski obuffer = null; 20751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 20851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski try { 20951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski flush(); 21051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } catch (IOException ignored) {} 21151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski out.close(); 21251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 21351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski} 214