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Diffstat (limited to 'src/share/jaxws_classes/com/sun/xml/internal/messaging/saaj/packaging/mime/util/BASE64DecoderStream.java')
| -rw-r--r-- | src/share/jaxws_classes/com/sun/xml/internal/messaging/saaj/packaging/mime/util/BASE64DecoderStream.java | 256 |
1 files changed, 0 insertions, 256 deletions
diff --git a/src/share/jaxws_classes/com/sun/xml/internal/messaging/saaj/packaging/mime/util/BASE64DecoderStream.java b/src/share/jaxws_classes/com/sun/xml/internal/messaging/saaj/packaging/mime/util/BASE64DecoderStream.java deleted file mode 100644 index 1aae5810..00000000 --- a/src/share/jaxws_classes/com/sun/xml/internal/messaging/saaj/packaging/mime/util/BASE64DecoderStream.java +++ /dev/null @@ -1,256 +0,0 @@ -/* - * Copyright (c) 1997, 2012, 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 ***/ -} |