jdk8-mips64-public/jaxws: comparison src/share/jaxws_classes/com/sun/xml/internal/org/jvnet/mimepull/BASE64DecoderStream.java

--1:000000000000
+:373ffda63c9a
+/*
+* 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.
+*/
+/* FROM mail.jar */
+package com.sun.xml.internal.org.jvnet.mimepull;
+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
+*/
+final class BASE64DecoderStream extends FilterInputStream {
+// buffer of decoded bytes for single byte reads
+private byte[] buffer = new byte[3];
+private int bufsize = 0;    // size of the cache
+private int index = 0;      // index into the cache
+// buffer for almost 8K of typical 76 chars + CRLF lines,
+// used by getByte method.  this buffer contains encoded bytes.
+private byte[] input_buffer = new byte[78*105];
+private int input_pos = 0;
+private int input_len = 0;;
+private boolean ignoreErrors = false;
+/**
+* Create a BASE64 decoder that decodes the specified input stream.
+* The System property <code>mail.mime.base64.ignoreerrors</code>
+* controls whether errors in the encoded data cause an exception
+* or are ignored.  The default is false (errors cause exception).
+*
+* @param in        the input stream
+*/
+public BASE64DecoderStream(InputStream in) {
+super(in);
+// default to false
+ignoreErrors = PropUtil.getBooleanSystemProperty(
+"mail.mime.base64.ignoreerrors", false);
+}
+/**
+* Create a BASE64 decoder that decodes the specified input stream.
+*
+* @param in        the input stream
+* @param ignoreErrors      ignore errors in encoded data?
+*/
+public BASE64DecoderStream(InputStream in, boolean ignoreErrors) {
+super(in);
+this.ignoreErrors = ignoreErrors;
+}
+/**
+* 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
+*/
+@Override
+public int read() throws IOException {
+if (index >= bufsize) {
+bufsize = decode(buffer, 0, buffer.length);
+if (bufsize <= 0) {
+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.
+*/
+@Override
+public int read(byte[] buf, int off, int len) throws IOException {
+// empty out single byte read buffer
+int off0 = off;
+while (index < bufsize && len > 0) {
+buf[off++] = buffer[index++];
+len--;
+}
+if (index >= bufsize) {
+bufsize = index = 0;
+}
+int bsize = (len / 3) * 3;      // round down to multiple of 3 bytes
+if (bsize > 0) {
+int size = decode(buf, off, bsize);
+off += size;
+len -= size;
+if (size != bsize) {        // hit EOF?
+if (off == off0) {
+return -1;
+} else {
+return off - off0;
+}
+}
+}
+// finish up with a partial read if necessary
+for (; len > 0; len--) {
+int c = read();
+if (c == -1) {
+break;
+}
+buf[off++] = (byte)c;
+}
+if (off == off0) {
+return -1;
+} else {
+return off - off0;
+}
+}
+/**
+* Skips over and discards n bytes of data from this stream.
+*/
+@Override
+public long skip(long n) throws IOException {
+long skipped = 0;
+while (n-- > 0 && read() >= 0) {
+skipped++;
+}
+return skipped;
+}
+/**
+* Tests if this input stream supports marks. Currently this class
+* does not support marks
+*/
+@Override
+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
+*/
+@Override
+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.  Most of the complexity here is dealing
+* with error cases.  Returns the number of bytes decoded, which
+* may be zero.  Decoding is done by filling an int with 4 6-bit
+* values by shifting them in from the bottom and then extracting
+* 3 8-bit bytes from the int by shifting them out from the bottom.
+*
+* @param   outbuf  the buffer into which to put the decoded bytes
+* @param   pos     position in the buffer to start filling
+* @param   len     the number of bytes to fill
+* @return          the number of bytes filled, always a multiple
+*                  of three, and may be zero
+* @exception       IOException     if the data is incorrectly formatted
+*/
+private int decode(byte[] outbuf, int pos, int len) throws IOException {
+int pos0 = pos;
+while (len >= 3) {
+/*
+* 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;
+int val = 0;
+while (got < 4) {
+int i = getByte();
+if (i == -1 || i == -2) {
+boolean atEOF;
+if (i == -1) {
+if (got == 0) {
+return pos - pos0;
+}
+if (!ignoreErrors) {
+throw new DecodingException(
+"BASE64Decoder: Error in encoded stream: " +
+"needed 4 valid base64 characters " +
+"but only got " + got + " before EOF" +
+recentChars());
+}
+atEOF = true;   // don't read any more
+} else {    // i == -2
+// found a padding character, we're at EOF
+// XXX - should do something to make EOF "sticky"
+if (got < 2 && !ignoreErrors) {
+throw new DecodingException(
+"BASE64Decoder: Error in encoded stream: " +
+"needed at least 2 valid base64 characters," +
+" but only got " + got +
+" before padding character (=)" +
+recentChars());
+}
+// didn't get any characters before padding character?
+if (got == 0) {
+return pos - pos0;
+}
+atEOF = false;  // need to keep reading
+}
+// pad partial result with zeroes
+// how many bytes will we produce on output?
+// (got always < 4, so size always < 3)
+int size = got - 1;
+if (size == 0) {
+size = 1;
+}
+// handle the one padding character we've seen
+got++;
+val <<= 6;
+while (got < 4) {
+if (!atEOF) {
+// consume the rest of the padding characters,
+// filling with zeroes
+i = getByte();
+if (i == -1) {
+if (!ignoreErrors) {
+throw new DecodingException(
+"BASE64Decoder: Error in encoded " +
+"stream: hit EOF while looking for " +
+"padding characters (=)" +
+recentChars());
+}
+} else if (i != -2) {
+if (!ignoreErrors) {
+throw new DecodingException(
+"BASE64Decoder: Error in encoded " +
+"stream: found valid base64 " +
+"character after a padding character " +
+"(=)" + recentChars());
+}
+}
+}
+val <<= 6;
+got++;
+}
+// now pull out however many valid bytes we got
+val >>= 8;          // always skip first one
+if (size == 2) {
+outbuf[pos + 1] = (byte)(val & 0xff);
+}
+val >>= 8;
+outbuf[pos] = (byte)(val & 0xff);
+// len -= size;     // not needed, return below
+pos += size;
+return pos - pos0;
+} else {
+// got a valid byte
+val <<= 6;
+got++;
+val |= i;
+}
+}
+// read 4 valid characters, now extract 3 bytes
+outbuf[pos + 2] = (byte)(val & 0xff);
+val >>= 8;
+outbuf[pos + 1] = (byte)(val & 0xff);
+val >>= 8;
+outbuf[pos] = (byte)(val & 0xff);
+len -= 3;
+pos += 3;
+}
+return pos - pos0;
+}
+/**
+* Read the next valid byte from the input stream.
+* Buffer lots of data from underlying stream in input_buffer,
+* for efficiency.
+*
+* @return  the next byte, -1 on EOF, or -2 if next byte is '='
+*          (padding at end of encoded data)
+*/
+private int getByte() throws IOException {
+int c;
+do {
+if (input_pos >= input_len) {
+try {
+input_len = in.read(input_buffer);
+} catch (EOFException ex) {
+return -1;
+}
+if (input_len <= 0) {
+return -1;
+}
+input_pos = 0;
+}
+// get the next byte in the buffer
+c = input_buffer[input_pos++] & 0xff;
+// is it a padding byte?
+if (c == '=') {
+return -2;
+}
+// no, convert it
+c = pem_convert_array[c];
+// loop until we get a legitimate byte
+} while (c == -1);
+return c;
+}
+/**
+* Return the most recent characters, for use in an error message.
+*/
+private String recentChars() {
+// reach into the input buffer and extract up to 10
+// recent characters, to help in debugging.
+StringBuilder errstr = new StringBuilder();
+int nc = input_pos > 10 ? 10 : input_pos;
+if (nc > 0) {
+errstr.append(", the ").append(nc).append(" most recent characters were: \"");
+for (int k = input_pos - nc; k < input_pos; k++) {
+char c = (char)(input_buffer[k] & 0xff);
+switch (c) {
+case '\r':  errstr.append("\\r"); break;
+case '\n':  errstr.append("\\n"); break;
+case '\t':  errstr.append("\\t"); break;
+default:
+if (c >= ' ' && c < 0177) {
+errstr.append(c);
+} else {
+errstr.append("\\").append((int)c);
+}
+}
+}
+errstr.append("\"");
+}
+return errstr.toString();
+}
+/**
+* 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) {
+int val;
+int osize = 3;
+val = pem_convert_array[inbuf[inpos++] & 0xff];
+val <<= 6;
+val |= pem_convert_array[inbuf[inpos++] & 0xff];
+val <<= 6;
+if (inbuf[inpos] != '=') {
+val |= pem_convert_array[inbuf[inpos++] & 0xff];
+} else {
+osize--;
+}
+val <<= 6;
+if (inbuf[inpos] != '=') {
+val |= pem_convert_array[inbuf[inpos++] & 0xff];
+} else {
+osize--;
+}
+if (osize > 2) {
+outbuf[outpos + 2] = (byte)(val & 0xff);
+}
+val >>= 8;
+if (osize > 1) {
+outbuf[outpos + 1] = (byte)(val & 0xff);
+}
+val >>= 8;
+outbuf[outpos] = (byte)(val & 0xff);
+outpos += osize;
+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 ***/
+}

Mercurial > jdk8-mips64-public > jaxws / file comparison

comparison: src/share/jaxws_classes/com/sun/xml/internal/org/jvnet/mimepull/BASE64DecoderStream.java

src/share/jaxws_classes/com/sun/xml/internal/org/jvnet/mimepull/BASE64DecoderStream.java