--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jaxws/src/java.xml.soap/share/classes/com/sun/xml/internal/messaging/saaj/packaging/mime/util/BASE64DecoderStream.java Sun Aug 17 15:52:15 2014 +0100
@@ -0,0 +1,256 @@
+/*
+ * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @(#)BASE64DecoderStream.java 1.8 02/03/27
+ */
+
+
+
+package com.sun.xml.internal.messaging.saaj.packaging.mime.util;
+
+import java.io.*;
+
+/**
+ * This class implements a BASE64 Decoder. It is implemented as
+ * a FilterInputStream, so one can just wrap this class around
+ * any input stream and read bytes from this filter. The decoding
+ * is done as the bytes are read out.
+ *
+ * @author John Mani
+ * @author Bill Shannon
+ */
+
+public class BASE64DecoderStream extends FilterInputStream {
+ private byte[] buffer; // cache of decoded bytes
+ private int bufsize = 0; // size of the cache
+ private int index = 0; // index into the cache
+
+ /**
+ * Create a BASE64 decoder that decodes the specified input stream
+ * @param in the input stream
+ */
+ public BASE64DecoderStream(InputStream in) {
+ super(in);
+ buffer = new byte[3];
+ }
+
+ /**
+ * Read the next decoded byte from this input stream. The byte
+ * is returned as an <code>int</code> in the range <code>0</code>
+ * to <code>255</code>. If no byte is available because the end of
+ * the stream has been reached, the value <code>-1</code> is returned.
+ * This method blocks until input data is available, the end of the
+ * stream is detected, or an exception is thrown.
+ *
+ * @return next byte of data, or <code>-1</code> if the end of the
+ * stream is reached.
+ * @exception IOException if an I/O error occurs.
+ * @see java.io.FilterInputStream#in
+ */
+ public int read() throws IOException {
+ if (index >= bufsize) {
+ decode(); // Fills up buffer
+ if (bufsize == 0) // buffer is empty
+ return -1;
+ index = 0; // reset index into buffer
+ }
+ return buffer[index++] & 0xff; // Zero off the MSB
+ }
+
+ /**
+ * Reads up to <code>len</code> decoded bytes of data from this input stream
+ * into an array of bytes. This method blocks until some input is
+ * available.
+ * <p>
+ *
+ * @param buf the buffer into which the data is read.
+ * @param off the start offset of the data.
+ * @param len the maximum number of bytes read.
+ * @return the total number of bytes read into the buffer, or
+ * <code>-1</code> if there is no more data because the end of
+ * the stream has been reached.
+ * @exception IOException if an I/O error occurs.
+ */
+ public int read(byte[] buf, int off, int len) throws IOException {
+ int i, c;
+ for (i = 0; i < len; i++) {
+ if ((c = read()) == -1) {
+ if (i == 0) // At end of stream, so we should
+ i = -1; // return -1 , NOT 0.
+ break;
+ }
+ buf[off+i] = (byte)c;
+ }
+
+ return i;
+ }
+
+ /**
+ * Tests if this input stream supports marks. Currently this class
+ * does not support marks
+ */
+ public boolean markSupported() {
+ return false; // Maybe later ..
+ }
+
+ /**
+ * Returns the number of bytes that can be read from this input
+ * stream without blocking. However, this figure is only
+ * a close approximation in case the original encoded stream
+ * contains embedded CRLFs; since the CRLFs are discarded, not decoded
+ */
+ public int available() throws IOException {
+ // This is only an estimate, since in.available()
+ // might include CRLFs too ..
+ return ((in.available() * 3)/4 + (bufsize-index));
+ }
+
+ /**
+ * This character array provides the character to value map
+ * based on RFC1521.
+ */
+ private final static char pem_array[] = {
+ 'A','B','C','D','E','F','G','H', // 0
+ 'I','J','K','L','M','N','O','P', // 1
+ 'Q','R','S','T','U','V','W','X', // 2
+ 'Y','Z','a','b','c','d','e','f', // 3
+ 'g','h','i','j','k','l','m','n', // 4
+ 'o','p','q','r','s','t','u','v', // 5
+ 'w','x','y','z','0','1','2','3', // 6
+ '4','5','6','7','8','9','+','/' // 7
+ };
+
+ private final static byte pem_convert_array[] = new byte[256];
+
+ static {
+ for (int i = 0; i < 255; i++)
+ pem_convert_array[i] = -1;
+ for(int i = 0; i < pem_array.length; i++)
+ pem_convert_array[pem_array[i]] = (byte) i;
+ }
+
+ /* The decoder algorithm */
+ private byte[] decode_buffer = new byte[4];
+ private void decode() throws IOException {
+ bufsize = 0;
+ /*
+ * We need 4 valid base64 characters before we start decoding.
+ * We skip anything that's not a valid base64 character (usually
+ * just CRLF).
+ */
+ int got = 0;
+ while (got < 4) {
+ int i = in.read();
+ if (i == -1) {
+ if (got == 0)
+ return; // EOF before any data is ok
+ throw new IOException("Error in encoded stream, got " + got);
+ }
+ if (i >= 0 && i < 256 && i == '=' || pem_convert_array[i] != -1)
+ decode_buffer[got++] = (byte)i;
+ }
+
+ byte a, b;
+ a = pem_convert_array[decode_buffer[0] & 0xff];
+ b = pem_convert_array[decode_buffer[1] & 0xff];
+ // The first decoded byte
+ buffer[bufsize++] = (byte)(((a << 2) & 0xfc) | ((b >>> 4) & 3));
+
+ if (decode_buffer[2] == '=') // End of this BASE64 encoding
+ return;
+ a = b;
+ b = pem_convert_array[decode_buffer[2] & 0xff];
+ // The second decoded byte
+ buffer[bufsize++] = (byte)(((a << 4) & 0xf0) | ((b >>> 2) & 0xf));
+
+ if (decode_buffer[3] == '=') // End of this BASE64 encoding
+ return;
+ a = b;
+ b = pem_convert_array[decode_buffer[3] & 0xff];
+ // The third decoded byte
+ buffer[bufsize++] = (byte)(((a << 6) & 0xc0) | (b & 0x3f));
+ }
+
+ /**
+ * Base64 decode a byte array. No line breaks are allowed.
+ * This method is suitable for short strings, such as those
+ * in the IMAP AUTHENTICATE protocol, but not to decode the
+ * entire content of a MIME part.
+ *
+ * NOTE: inbuf may only contain valid base64 characters.
+ * Whitespace is not ignored.
+ */
+ public static byte[] decode(byte[] inbuf) {
+ int size = (inbuf.length / 4) * 3;
+ if (size == 0)
+ return inbuf;
+
+ if (inbuf[inbuf.length - 1] == '=') {
+ size--;
+ if (inbuf[inbuf.length - 2] == '=')
+ size--;
+ }
+ byte[] outbuf = new byte[size];
+
+ int inpos = 0, outpos = 0;
+ size = inbuf.length;
+ while (size > 0) {
+ byte a, b;
+ a = pem_convert_array[inbuf[inpos++] & 0xff];
+ b = pem_convert_array[inbuf[inpos++] & 0xff];
+ // The first decoded byte
+ outbuf[outpos++] = (byte)(((a << 2) & 0xfc) | ((b >>> 4) & 3));
+
+ if (inbuf[inpos] == '=') // End of this BASE64 encoding
+ return outbuf;
+ a = b;
+ b = pem_convert_array[inbuf[inpos++] & 0xff];
+ // The second decoded byte
+ outbuf[outpos++] = (byte)(((a << 4) & 0xf0) | ((b >>> 2) & 0xf));
+
+ if (inbuf[inpos] == '=') // End of this BASE64 encoding
+ return outbuf;
+ a = b;
+ b = pem_convert_array[inbuf[inpos++] & 0xff];
+ // The third decoded byte
+ outbuf[outpos++] = (byte)(((a << 6) & 0xc0) | (b & 0x3f));
+ size -= 4;
+ }
+ return outbuf;
+ }
+
+ /*** begin TEST program ***
+ public static void main(String argv[]) throws Exception {
+ FileInputStream infile = new FileInputStream(argv[0]);
+ BASE64DecoderStream decoder = new BASE64DecoderStream(infile);
+ int c;
+
+ while ((c = decoder.read()) != -1)
+ System.out.print((char)c);
+ System.out.flush();
+ }
+ *** end TEST program ***/
+}