1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/jaxws_classes/com/sun/xml/internal/messaging/saaj/packaging/mime/util/BASE64EncoderStream.java Tue Mar 06 16:09:35 2012 -0800
1.3 @@ -0,0 +1,244 @@
1.4 +/*
1.5 + * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation. Oracle designates this
1.11 + * particular file as subject to the "Classpath" exception as provided
1.12 + * by Oracle in the LICENSE file that accompanied this code.
1.13 + *
1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 + * version 2 for more details (a copy is included in the LICENSE file that
1.18 + * accompanied this code).
1.19 + *
1.20 + * You should have received a copy of the GNU General Public License version
1.21 + * 2 along with this work; if not, write to the Free Software Foundation,
1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 + *
1.24 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.25 + * or visit www.oracle.com if you need additional information or have any
1.26 + * questions.
1.27 + */
1.28 +
1.29 +/*
1.30 + * @(#)BASE64EncoderStream.java 1.6 02/03/27
1.31 + */
1.32 +
1.33 +
1.34 +
1.35 +package com.sun.xml.internal.messaging.saaj.packaging.mime.util;
1.36 +
1.37 +import java.io.*;
1.38 +
1.39 +/**
1.40 + * This class implements a BASE64 Encoder. It is implemented as
1.41 + * a FilterOutputStream, so one can just wrap this class around
1.42 + * any output stream and write bytes into this filter. The Encoding
1.43 + * is done as the bytes are written out.
1.44 + *
1.45 + * @author John Mani
1.46 + * @author Bill Shannon
1.47 + */
1.48 +
1.49 +public class BASE64EncoderStream extends FilterOutputStream {
1.50 + private byte[] buffer; // cache of bytes that are yet to be encoded
1.51 + private int bufsize = 0; // size of the cache
1.52 + private int count = 0; // number of bytes that have been output
1.53 + private int bytesPerLine; // number of bytes per line
1.54 +
1.55 + /**
1.56 + * Create a BASE64 encoder that encodes the specified input stream
1.57 + * @param out the output stream
1.58 + * @param bytesPerLine number of bytes per line. The encoder inserts
1.59 + * a CRLF sequence after the specified number of bytes
1.60 + */
1.61 + public BASE64EncoderStream(OutputStream out, int bytesPerLine) {
1.62 + super(out);
1.63 + buffer = new byte[3];
1.64 + this.bytesPerLine = bytesPerLine;
1.65 + }
1.66 +
1.67 + /**
1.68 + * Create a BASE64 encoder that encodes the specified input stream.
1.69 + * Inserts the CRLF sequence after outputting 76 bytes.
1.70 + * @param out the output stream
1.71 + */
1.72 + public BASE64EncoderStream(OutputStream out) {
1.73 + this(out, 76);
1.74 + }
1.75 +
1.76 + /**
1.77 + * Encodes <code>len</code> bytes from the specified
1.78 + * <code>byte</code> array starting at offset <code>off</code> to
1.79 + * this output stream.
1.80 + *
1.81 + * @param b the data.
1.82 + * @param off the start offset in the data.
1.83 + * @param len the number of bytes to write.
1.84 + * @exception IOException if an I/O error occurs.
1.85 + */
1.86 + public void write(byte[] b, int off, int len) throws IOException {
1.87 + for (int i = 0; i < len; i++)
1.88 + write(b[off + i]);
1.89 + }
1.90 +
1.91 + /**
1.92 + * Encodes <code>b.length</code> bytes to this output stream.
1.93 + * @param b the data to be written.
1.94 + * @exception IOException if an I/O error occurs.
1.95 + */
1.96 + public void write(byte[] b) throws IOException {
1.97 + write(b, 0, b.length);
1.98 + }
1.99 +
1.100 + /**
1.101 + * Encodes the specified <code>byte</code> to this output stream.
1.102 + * @param c the <code>byte</code>.
1.103 + * @exception IOException if an I/O error occurs.
1.104 + */
1.105 + public void write(int c) throws IOException {
1.106 + buffer[bufsize++] = (byte)c;
1.107 + if (bufsize == 3) { // Encoding unit = 3 bytes
1.108 + encode();
1.109 + bufsize = 0;
1.110 + }
1.111 + }
1.112 +
1.113 + /**
1.114 + * Flushes this output stream and forces any buffered output bytes
1.115 + * to be encoded out to the stream.
1.116 + * @exception IOException if an I/O error occurs.
1.117 + */
1.118 + public void flush() throws IOException {
1.119 + if (bufsize > 0) { // If there's unencoded characters in the buffer ..
1.120 + encode(); // .. encode them
1.121 + bufsize = 0;
1.122 + }
1.123 + out.flush();
1.124 + }
1.125 +
1.126 + /**
1.127 + * Forces any buffered output bytes to be encoded out to the stream
1.128 + * and closes this output stream
1.129 + */
1.130 + public void close() throws IOException {
1.131 + flush();
1.132 + out.close();
1.133 + }
1.134 +
1.135 + /** This array maps the characters to their 6 bit values */
1.136 + private final static char pem_array[] = {
1.137 + 'A','B','C','D','E','F','G','H', // 0
1.138 + 'I','J','K','L','M','N','O','P', // 1
1.139 + 'Q','R','S','T','U','V','W','X', // 2
1.140 + 'Y','Z','a','b','c','d','e','f', // 3
1.141 + 'g','h','i','j','k','l','m','n', // 4
1.142 + 'o','p','q','r','s','t','u','v', // 5
1.143 + 'w','x','y','z','0','1','2','3', // 6
1.144 + '4','5','6','7','8','9','+','/' // 7
1.145 + };
1.146 +
1.147 + private void encode() throws IOException {
1.148 + // If writing out this encoded unit will cause overflow,
1.149 + // start a new line.
1.150 + if (count + 4 > bytesPerLine) {
1.151 + out.write('\r');
1.152 + out.write('\n');
1.153 + count = 0;
1.154 + }
1.155 +
1.156 + byte a, b, c;
1.157 + if (bufsize == 1) {
1.158 + a = buffer[0];
1.159 + b = 0;
1.160 + c = 0;
1.161 + out.write(pem_array[(a >>> 2) & 0x3F]);
1.162 + out.write(pem_array[((a << 4) & 0x30) + ((b >>> 4) & 0xf)]);
1.163 + out.write('='); // pad character
1.164 + out.write('='); // pad character
1.165 + } else if (bufsize == 2) {
1.166 + a = buffer[0];
1.167 + b = buffer[1];
1.168 + c = 0;
1.169 + out.write(pem_array[(a >>> 2) & 0x3F]);
1.170 + out.write(pem_array[((a << 4) & 0x30) + ((b >>> 4) & 0xf)]);
1.171 + out.write(pem_array[((b << 2) & 0x3c) + ((c >>> 6) & 0x3)]);
1.172 + out.write('='); // pad character
1.173 + } else {
1.174 + a = buffer[0];
1.175 + b = buffer[1];
1.176 + c = buffer[2];
1.177 + out.write(pem_array[(a >>> 2) & 0x3F]);
1.178 + out.write(pem_array[((a << 4) & 0x30) + ((b >>> 4) & 0xf)]);
1.179 + out.write(pem_array[((b << 2) & 0x3c) + ((c >>> 6) & 0x3)]);
1.180 + out.write(pem_array[c & 0x3F]);
1.181 + }
1.182 +
1.183 + // increment count
1.184 + count += 4;
1.185 + }
1.186 +
1.187 + /**
1.188 + * Base64 encode a byte array. No line breaks are inserted.
1.189 + * This method is suitable for short strings, such as those
1.190 + * in the IMAP AUTHENTICATE protocol, but not to encode the
1.191 + * entire content of a MIME part.
1.192 + */
1.193 + public static byte[] encode(byte[] inbuf) {
1.194 + if (inbuf.length == 0)
1.195 + return inbuf;
1.196 + byte[] outbuf = new byte[((inbuf.length + 2) / 3) * 4];
1.197 + int inpos = 0, outpos = 0;
1.198 + int size = inbuf.length;
1.199 + while (size > 0) {
1.200 + byte a, b, c;
1.201 + if (size == 1) {
1.202 + a = inbuf[inpos++];
1.203 + b = 0;
1.204 + c = 0;
1.205 + outbuf[outpos++] = (byte)pem_array[(a >>> 2) & 0x3F];
1.206 + outbuf[outpos++] =
1.207 + (byte)pem_array[((a << 4) & 0x30) + ((b >>> 4) & 0xf)];
1.208 + outbuf[outpos++] = (byte)'='; // pad character
1.209 + outbuf[outpos++] = (byte)'='; // pad character
1.210 + } else if (size == 2) {
1.211 + a = inbuf[inpos++];
1.212 + b = inbuf[inpos++];
1.213 + c = 0;
1.214 + outbuf[outpos++] = (byte)pem_array[(a >>> 2) & 0x3F];
1.215 + outbuf[outpos++] =
1.216 + (byte)pem_array[((a << 4) & 0x30) + ((b >>> 4) & 0xf)];
1.217 + outbuf[outpos++] =
1.218 + (byte)pem_array[((b << 2) & 0x3c) + ((c >>> 6) & 0x3)];
1.219 + outbuf[outpos++] = (byte)'='; // pad character
1.220 + } else {
1.221 + a = inbuf[inpos++];
1.222 + b = inbuf[inpos++];
1.223 + c = inbuf[inpos++];
1.224 + outbuf[outpos++] = (byte)pem_array[(a >>> 2) & 0x3F];
1.225 + outbuf[outpos++] =
1.226 + (byte)pem_array[((a << 4) & 0x30) + ((b >>> 4) & 0xf)];
1.227 + outbuf[outpos++] =
1.228 + (byte)pem_array[((b << 2) & 0x3c) + ((c >>> 6) & 0x3)];
1.229 + outbuf[outpos++] = (byte)pem_array[c & 0x3F];
1.230 + }
1.231 + size -= 3;
1.232 + }
1.233 + return outbuf;
1.234 + }
1.235 +
1.236 + /*** begin TEST program
1.237 + public static void main(String argv[]) throws Exception {
1.238 + FileInputStream infile = new FileInputStream(argv[0]);
1.239 + BASE64EncoderStream encoder = new BASE64EncoderStream(System.out);
1.240 + int c;
1.241 +
1.242 + while ((c = infile.read()) != -1)
1.243 + encoder.write(c);
1.244 + encoder.close();
1.245 + }
1.246 + *** end TEST program **/
1.247 +}
