directory-commits mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From plusplusjia...@apache.org
Subject [17/19] directory-kerby git commit: A clean up
Date Wed, 09 Dec 2015 02:13:29 GMT
A clean up


Project: http://git-wip-us.apache.org/repos/asf/directory-kerby/repo
Commit: http://git-wip-us.apache.org/repos/asf/directory-kerby/commit/e3c02105
Tree: http://git-wip-us.apache.org/repos/asf/directory-kerby/tree/e3c02105
Diff: http://git-wip-us.apache.org/repos/asf/directory-kerby/diff/e3c02105

Branch: refs/heads/pkinit-support
Commit: e3c021050f1cea0be13b1765cdfb6a171844af0d
Parents: 19f5715
Author: Kai Zheng <kai.zheng@intel.com>
Authored: Wed Dec 9 07:00:05 2015 +0800
Committer: Kai Zheng <kai.zheng@intel.com>
Committed: Wed Dec 9 07:00:05 2015 +0800

----------------------------------------------------------------------
 .../java/org/apache/kerby/asn1/util/Base64.java | 1048 ------------------
 1 file changed, 1048 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/directory-kerby/blob/e3c02105/kerby-asn1/src/main/java/org/apache/kerby/asn1/util/Base64.java
----------------------------------------------------------------------
diff --git a/kerby-asn1/src/main/java/org/apache/kerby/asn1/util/Base64.java b/kerby-asn1/src/main/java/org/apache/kerby/asn1/util/Base64.java
deleted file mode 100644
index a15f477..0000000
--- a/kerby-asn1/src/main/java/org/apache/kerby/asn1/util/Base64.java
+++ /dev/null
@@ -1,1048 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.kerby.asn1.util;
-
-import java.math.BigInteger;
-
-/**
- * Provides Base64 encoding and decoding as defined by RFC 2045.
- *
- * <p>
- * This class implements section <cite>6.8. Base64 Content-Transfer-Encoding</cite>
from RFC 2045 <cite>Multipurpose
- * Internet Mail Extensions (MIME) Part One: Format of Internet Message Bodies</cite>
by Freed and Borenstein.
- * </p>
- * <p>
- * The class can be parameterized in the following manner with various constructors:
- * </p>
- * <ul>
- * <li>URL-safe mode: Default off.</li>
- * <li>Line length: Default 76. Line length that aren't multiples of 4 will still essentially
end up being multiples of
- * 4 in the encoded data.</li>
- * <li>Line separator: Default is CRLF ("\r\n")</li>
- * </ul>
- * <p>
- * Since this class operates directly on byte streams, and not character streams, it is hard-coded
to only encode/decode
- * character encodings which are compatible with the lower 127 ASCII chart (ISO-8859-1, Windows-1252,
UTF-8, etc).
- * </p>
- *
- * @see <a href="http://www.ietf.org/rfc/rfc2045.txt">RFC 2045</a>
- * @author Apache Software Foundation
- * @since 1.0
- * @version $Id: Base64.java 155 2009-09-17 21:00:58Z julius $
- */
-public class Base64 {
-    private static final int DEFAULT_BUFFER_RESIZE_FACTOR = 2;
-
-    private static final int DEFAULT_BUFFER_SIZE = 8192;
-
-    /**
-     * Chunk size per RFC 2045 section 6.8.
-     *
-     * <p>
-     * The {@value} character limit does not count the trailing CRLF, but counts all other
characters, including any
-     * equal signs.
-     * </p>
-     *
-     * @see <a href="http://www.ietf.org/rfc/rfc2045.txt">RFC 2045 section 6.8</a>
-     */
-    static final int CHUNK_SIZE = 76;
-
-    /**
-     * Chunk separator per RFC 2045 section 2.1.
-     *
-     * <p>
-     * N.B. The next major release may break compatibility and make this field private.
-     * </p>
-     *
-     * @see <a href="http://www.ietf.org/rfc/rfc2045.txt">RFC 2045 section 2.1</a>
-     */
-    static final byte[] CHUNK_SEPARATOR = {'\r', '\n'};
-
-    /**
-     * This array is a lookup table that translates 6-bit positive integer index values into
their "Base64 Alphabet"
-     * equivalents as specified in Table 1 of RFC 2045.
-     *
-     * Thanks to "commons" project in ws.apache.org for this code.
-     * http://svn.apache.org/repos/asf/webservices/commons/trunk/modules/util/
-     */
-    private static final byte[] STANDARD_ENCODE_TABLE = {
-            'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
-            'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
-            'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
-            'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
-            '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/'
-    };
-
-    /**
-     * This is a copy of the STANDARD_ENCODE_TABLE above, but with + and /
-     * changed to - and _ to make the encoded Base64 results more URL-SAFE.
-     * This table is only used when the Base64's mode is set to URL-SAFE.
-     */
-    private static final byte[] URL_SAFE_ENCODE_TABLE = {
-            'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
-            'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
-            'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
-            'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
-            '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '-', '_'
-    };
-
-    /**
-     * Byte used to pad output.
-     */
-    private static final byte PAD = '=';
-
-    /**
-     * This array is a lookup table that translates Unicode characters drawn from the "Base64
Alphabet" (as specified in
-     * Table 1 of RFC 2045) into their 6-bit positive integer equivalents. Characters that
are not in the Base64
-     * alphabet but fall within the bounds of the array are translated to -1.
-     *
-     * Note: '+' and '-' both decode to 62. '/' and '_' both decode to 63. This means decoder
seamlessly handles both
-     * URL_SAFE and STANDARD base64. (The encoder, on the other hand, needs to know ahead
of time what to emit).
-     *
-     * Thanks to "commons" project in ws.apache.org for this code.
-     * http://svn.apache.org/repos/asf/webservices/commons/trunk/modules/util/
-     */
-    private static final byte[] DECODE_TABLE = {
-            -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-            -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-            -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, 62, -1, 63, 52, 53, 54,
-            55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, 3, 4,
-            5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,
-            24, 25, -1, -1, -1, -1, 63, -1, 26, 27, 28, 29, 30, 31, 32, 33, 34,
-            35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51
-    };
-
-    /** Mask used to extract 6 bits, used when encoding */
-    private static final int MASK_6BITS = 0x3f;
-
-    /** Mask used to extract 8 bits, used in decoding base64 bytes */
-    private static final int MASK_8BITS = 0xff;
-
-    // The static final fields above are used for the original static byte[] methods on Base64.
-    // The private member fields below are used with the new streaming approach, which requires
-    // some state be preserved between calls of encode() and decode().
-
-    /**
-     * Encode table to use: either STANDARD or URL_SAFE. Note: the DECODE_TABLE above remains
static because it is able
-     * to decode both STANDARD and URL_SAFE streams, but the encodeTable must be a member
variable so we can switch
-     * between the two modes.
-     */
-    private final byte[] encodeTable;
-
-    /**
-     * Line length for encoding. Not used when decoding. A value of zero or less implies
no chunking of the base64
-     * encoded data.
-     */
-    private final int lineLength;
-
-    /**
-     * Line separator for encoding. Not used when decoding. Only used if lineLength >
0.
-     */
-    private final byte[] lineSeparator;
-
-    /**
-     * Convenience variable to help us determine when our buffer is going to run out of room
and needs resizing.
-     * <code>decodeSize = 3 + lineSeparator.length;</code>
-     */
-    private final int decodeSize;
-
-    /**
-     * Convenience variable to help us determine when our buffer is going to run out of room
and needs resizing.
-     * <code>encodeSize = 4 + lineSeparator.length;</code>
-     */
-    private final int encodeSize;
-
-    /**
-     * Buffer for streaming.
-     */
-    private byte[] buffer;
-
-    /**
-     * Position where next character should be written in the buffer.
-     */
-    private int pos;
-
-    /**
-     * Position where next character should be read from the buffer.
-     */
-    private int readPos;
-
-    /**
-     * Variable tracks how many characters have been written to the current line. Only used
when encoding. We use it to
-     * make sure each encoded line never goes beyond lineLength (if lineLength > 0).
-     */
-    private int currentLinePos;
-
-    /**
-     * Writes to the buffer only occur after every 3 reads when encoding, an every 4 reads
when decoding. This variable
-     * helps track that.
-     */
-    private int modulus;
-
-    /**
-     * Boolean flag to indicate the EOF has been reached. Once EOF has been reached, this
Base64 object becomes useless,
-     * and must be thrown away.
-     */
-    private boolean eof;
-
-    /**
-     * Place holder for the 3 bytes we're dealing with for our base64 logic. Bitwise operations
store and extract the
-     * base64 encoding or decoding from this variable.
-     */
-    private int x;
-
-    /**
-     * Creates a Base64 codec used for decoding (all modes) and encoding in URL-unsafe mode.
-     * <p>
-     * When encoding the line length is 76, the line separator is CRLF, and the encoding
table is STANDARD_ENCODE_TABLE.
-     * </p>
-     *
-     * <p>
-     * When decoding all variants are supported.
-     * </p>
-     */
-    public Base64() {
-        this(false);
-    }
-
-    /**
-     * Creates a Base64 codec used for decoding (all modes) and encoding in the given URL-safe
mode.
-     * <p>
-     * When encoding the line length is 76, the line separator is CRLF, and the encoding
table is STANDARD_ENCODE_TABLE.
-     * </p>
-     *
-     * <p>
-     * When decoding all variants are supported.
-     * </p>
-     *
-     * @param urlSafe
-     *            if <code>true</code>, URL-safe encoding is used. In most cases
this should be set to
-     *            <code>false</code>.
-     * @since 1.4
-     */
-    public Base64(boolean urlSafe) {
-        this(CHUNK_SIZE, CHUNK_SEPARATOR, urlSafe);
-    }
-
-    /**
-     * Creates a Base64 codec used for decoding (all modes) and encoding in URL-unsafe mode.
-     * <p>
-     * When encoding the line length is given in the constructor, the line separator is CRLF,
and the encoding table is
-     * STANDARD_ENCODE_TABLE.
-     * </p>
-     * <p>
-     * Line lengths that aren't multiples of 4 will still essentially end up being multiples
of 4 in the encoded data.
-     * </p>
-     * <p>
-     * When decoding all variants are supported.
-     * </p>
-     *
-     * @param lineLength
-     *            Each line of encoded data will be at most of the given length (rounded
down to nearest multiple of 4).
-     *            If {@code lineLength <= 0}, then the output will not be divided into
lines (chunks). Ignored when decoding.
-     * @since 1.4
-     */
-    public Base64(int lineLength) {
-        this(lineLength, CHUNK_SEPARATOR);
-    }
-
-    /**
-     * Creates a Base64 codec used for decoding (all modes) and encoding in URL-unsafe mode.
-     * <p>
-     * When encoding the line length and line separator are given in the constructor, and
the encoding table is
-     * STANDARD_ENCODE_TABLE.
-     * </p>
-     * <p>
-     * Line lengths that aren't multiples of 4 will still essentially end up being multiples
of 4 in the encoded data.
-     * </p>
-     * <p>
-     * When decoding all variants are supported.
-     * </p>
-     *
-     * @param lineLength
-     *            Each line of encoded data will be at most of the given length (rounded
down to nearest multiple of 4).
-     *            If {@code lineLength <= 0}, then the output will not be divided into
lines (chunks). Ignored when decoding.
-     * @param lineSeparator
-     *            Each line of encoded data will end with this sequence of bytes.
-     * @throws IllegalArgumentException
-     *             Thrown when the provided lineSeparator included some base64 characters.
-     * @since 1.4
-     */
-    public Base64(int lineLength, byte[] lineSeparator) {
-        this(lineLength, lineSeparator, false);
-    }
-
-    /**
-     * Creates a Base64 codec used for decoding (all modes) and encoding in URL-unsafe mode.
-     * <p>
-     * When encoding the line length and line separator are given in the constructor, and
the encoding table is
-     * STANDARD_ENCODE_TABLE.
-     * </p>
-     * <p>
-     * Line lengths that aren't multiples of 4 will still essentially end up being multiples
of 4 in the encoded data.
-     * </p>
-     * <p>
-     * When decoding all variants are supported.
-     * </p>
-     *
-     * @param lineLength
-     *            Each line of encoded data will be at most of the given length (rounded
down to nearest multiple of 4).
-     *            If {@code lineLength <= 0}, then the output will not be divided into
lines (chunks). Ignored when decoding.
-     * @param lineSeparator
-     *            Each line of encoded data will end with this sequence of bytes.
-     * @param urlSafe
-     *            Instead of emitting '+' and '/' we emit '-' and '_' respectively. urlSafe
is only applied to encode
-     *            operations. Decoding seamlessly handles both modes.
-     * @throws IllegalArgumentException
-     *             The provided lineSeparator included some base64 characters. That's not
going to work!
-     * @since 1.4
-     */
-    public Base64(int lineLength, byte[] lineSeparator, boolean urlSafe) {
-        if (lineSeparator == null) {
-            lineLength = 0;  // disable chunk-separating
-            lineSeparator = CHUNK_SEPARATOR;  // this just gets ignored
-        }
-        this.lineLength = lineLength > 0 ? (lineLength / 4) * 4 : 0;
-        this.lineSeparator = new byte[lineSeparator.length];
-        System.arraycopy(lineSeparator, 0, this.lineSeparator, 0, lineSeparator.length);
-        if (lineLength > 0) {
-            this.encodeSize = 4 + lineSeparator.length;
-        } else {
-            this.encodeSize = 4;
-        }
-        this.decodeSize = this.encodeSize - 1;
-        if (containsBase64Byte(lineSeparator)) {
-            String sep = Utf8.toString(lineSeparator);
-            throw new IllegalArgumentException("lineSeperator must not contain base64 characters:
[" + sep + "]");
-        }
-        this.encodeTable = urlSafe ? URL_SAFE_ENCODE_TABLE : STANDARD_ENCODE_TABLE;
-    }
-
-    /**
-     * Returns our current encode mode. True if we're URL-SAFE, false otherwise.
-     *
-     * @return true if we're in URL-SAFE mode, false otherwise.
-     * @since 1.4
-     */
-    public boolean isUrlSafe() {
-        return this.encodeTable == URL_SAFE_ENCODE_TABLE;
-    }
-
-    /**
-     * Returns true if this Base64 object has buffered data for reading.
-     *
-     * @return true if there is Base64 object still available for reading.
-     */
-    boolean hasData() {
-        return this.buffer != null;
-    }
-
-    /**
-     * Returns the amount of buffered data available for reading.
-     *
-     * @return The amount of buffered data available for reading.
-     */
-    int avail() {
-        return buffer != null ? pos - readPos : 0;
-    }
-
-    /** Doubles our buffer. */
-    private void resizeBuffer() {
-        if (buffer == null) {
-            buffer = new byte[DEFAULT_BUFFER_SIZE];
-            pos = 0;
-            readPos = 0;
-        } else {
-            byte[] b = new byte[buffer.length * DEFAULT_BUFFER_RESIZE_FACTOR];
-            System.arraycopy(buffer, 0, b, 0, buffer.length);
-            buffer = b;
-        }
-    }
-
-    /**
-     * Extracts buffered data into the provided byte[] array, starting at position bPos,
up to a maximum of bAvail
-     * bytes. Returns how many bytes were actually extracted.
-     *
-     * @param b
-     *            byte[] array to extract the buffered data into.
-     * @param bPos
-     *            position in byte[] array to start extraction at.
-     * @param bAvail
-     *            amount of bytes we're allowed to extract. We may extract fewer (if fewer
are available).
-     * @return The number of bytes successfully extracted into the provided byte[] array.
-     */
-    int readResults(byte[] b, int bPos, int bAvail) {
-        if (buffer != null) {
-            int len = Math.min(avail(), bAvail);
-            if (buffer != b) {
-                System.arraycopy(buffer, readPos, b, bPos, len);
-                readPos += len;
-                if (readPos >= pos) {
-                    buffer = null;
-                }
-            } else {
-                // Re-using the original consumer's output array is only
-                // allowed for one round.
-                buffer = null;
-            }
-            return len;
-        }
-        return eof ? -1 : 0;
-    }
-
-    /**
-     * Sets the streaming buffer. This is a small optimization where we try to buffer directly
to the consumer's output
-     * array for one round (if the consumer calls this method first) instead of starting
our own buffer.
-     *
-     * @param out
-     *            byte[] array to buffer directly to.
-     * @param outPos
-     *            Position to start buffering into.
-     * @param outAvail
-     *            Amount of bytes available for direct buffering.
-     */
-    void setInitialBuffer(byte[] out, int outPos, int outAvail) {
-        // We can re-use consumer's original output array under
-        // special circumstances, saving on some System.arraycopy().
-        if (out != null && out.length == outAvail) {
-            buffer = out;
-            pos = outPos;
-            readPos = outPos;
-        }
-    }
-
-    /**
-     * <p>
-     * Encodes all of the provided data, starting at inPos, for inAvail bytes. Must be called
at least twice: once with
-     * the data to encode, and once with inAvail set to "-1" to alert encoder that EOF has
been reached, so flush last
-     * remaining bytes (if not multiple of 3).
-     * </p>
-     * <p>
-     * Thanks to "commons" project in ws.apache.org for the bitwise operations, and general
approach.
-     * http://svn.apache.org/repos/asf/webservices/commons/trunk/modules/util/
-     * </p>
-     *
-     * @param in
-     *            byte[] array of binary data to base64 encode.
-     * @param inPos
-     *            Position to start reading data from.
-     * @param inAvail
-     *            Amount of bytes available from input for encoding.
-     */
-    void encode(byte[] in, int inPos, int inAvail) {
-        if (eof) {
-            return;
-        }
-        // inAvail < 0 is how we're informed of EOF in the underlying data we're
-        // encoding.
-        if (inAvail < 0) {
-            eof = true;
-            if (buffer == null || buffer.length - pos < encodeSize) {
-                resizeBuffer();
-            }
-            switch (modulus) {
-                case 1 :
-                    buffer[pos++] = encodeTable[(x >> 2) & MASK_6BITS];
-                    buffer[pos++] = encodeTable[(x << 4) & MASK_6BITS];
-                    // URL-SAFE skips the padding to further reduce size.
-                    if (encodeTable == STANDARD_ENCODE_TABLE) {
-                        buffer[pos++] = PAD;
-                        buffer[pos++] = PAD;
-                    }
-                    break;
-
-                case 2 :
-                    buffer[pos++] = encodeTable[(x >> 10) & MASK_6BITS];
-                    buffer[pos++] = encodeTable[(x >> 4) & MASK_6BITS];
-                    buffer[pos++] = encodeTable[(x << 2) & MASK_6BITS];
-                    // URL-SAFE skips the padding to further reduce size.
-                    if (encodeTable == STANDARD_ENCODE_TABLE) {
-                        buffer[pos++] = PAD;
-                    }
-                    break;
-                default:
-                    break;
-            }
-            if (lineLength > 0 && pos > 0) {
-                System.arraycopy(lineSeparator, 0, buffer, pos, lineSeparator.length);
-                pos += lineSeparator.length;
-            }
-        } else {
-            for (int i = 0; i < inAvail; i++) {
-                if (buffer == null || buffer.length - pos < encodeSize) {
-                    resizeBuffer();
-                }
-                modulus = (++modulus) % 3;
-                int b = in[inPos++];
-                if (b < 0) {
-                    b += 256;
-                }
-                x = (x << 8) + b;
-                if (0 == modulus) {
-                    buffer[pos++] = encodeTable[(x >> 18) & MASK_6BITS];
-                    buffer[pos++] = encodeTable[(x >> 12) & MASK_6BITS];
-                    buffer[pos++] = encodeTable[(x >> 6) & MASK_6BITS];
-                    buffer[pos++] = encodeTable[x & MASK_6BITS];
-                    currentLinePos += 4;
-                    if (lineLength > 0 && lineLength <= currentLinePos) {
-                        System.arraycopy(lineSeparator, 0, buffer, pos, lineSeparator.length);
-                        pos += lineSeparator.length;
-                        currentLinePos = 0;
-                    }
-                }
-            }
-        }
-    }
-
-    /**
-     * <p>
-     * Decodes all of the provided data, starting at inPos, for inAvail bytes. Should be
called at least twice: once
-     * with the data to decode, and once with inAvail set to "-1" to alert decoder that EOF
has been reached. The "-1"
-     * call is not necessary when decoding, but it doesn't hurt, either.
-     * </p>
-     * <p>
-     * Ignores all non-base64 characters. This is how chunked (e.g. 76 character) data is
handled, since CR and LF are
-     * silently ignored, but has implications for other bytes, too. This method subscribes
to the garbage-in,
-     * garbage-out philosophy: it will not check the provided data for validity.
-     * </p>
-     * <p>
-     * Thanks to "commons" project in ws.apache.org for the bitwise operations, and general
approach.
-     * http://svn.apache.org/repos/asf/webservices/commons/trunk/modules/util/
-     * </p>
-     *
-     * @param in
-     *            byte[] array of ascii data to base64 decode.
-     * @param inPos
-     *            Position to start reading data from.
-     * @param inAvail
-     *            Amount of bytes available from input for encoding.
-     */
-    void decode(byte[] in, int inPos, int inAvail) {
-        if (eof) {
-            return;
-        }
-        if (inAvail < 0) {
-            eof = true;
-        }
-        for (int i = 0; i < inAvail; i++) {
-            if (buffer == null || buffer.length - pos < decodeSize) {
-                resizeBuffer();
-            }
-            byte b = in[inPos++];
-            if (b == PAD) {
-                // We're done.
-                eof = true;
-                break;
-            } else {
-                if (b >= 0 && b < DECODE_TABLE.length) {
-                    int result = DECODE_TABLE[b];
-                    if (result >= 0) {
-                        modulus = (++modulus) % 4;
-                        x = (x << 6) + result;
-                        if (modulus == 0) {
-                            buffer[pos++] = (byte) ((x >> 16) & MASK_8BITS);
-                            buffer[pos++] = (byte) ((x >> 8) & MASK_8BITS);
-                            buffer[pos++] = (byte) (x & MASK_8BITS);
-                        }
-                    }
-                }
-            }
-        }
-
-        // Two forms of EOF as far as base64 decoder is concerned: actual
-        // EOF (-1) and first time '=' character is encountered in stream.
-        // This approach makes the '=' padding characters completely optional.
-        if (eof && modulus != 0) {
-            x = x << 6;
-            switch (modulus) {
-                case 2 :
-                    x = x << 6;
-                    buffer[pos++] = (byte) ((x >> 16) & MASK_8BITS);
-                    break;
-                case 3 :
-                    buffer[pos++] = (byte) ((x >> 16) & MASK_8BITS);
-                    buffer[pos++] = (byte) ((x >> 8) & MASK_8BITS);
-                    break;
-                default :
-                    break;
-            }
-        }
-    }
-
-    /**
-     * Returns whether or not the <code>octet</code> is in the base 64 alphabet.
-     *
-     * @param octet
-     *            The value to test
-     * @return <code>true</code> if the value is defined in the the base 64 alphabet,
<code>false</code> otherwise.
-     * @since 1.4
-     */
-    public static boolean isBase64(byte octet) {
-        return octet == PAD || octet >= 0 && octet < DECODE_TABLE.length &&
DECODE_TABLE[octet] != -1;
-    }
-
-    /**
-     * Tests a given byte array to see if it contains only valid characters within the Base64
alphabet. Currently the
-     * method treats whitespace as valid.
-     *
-     * @param arrayOctet
-     *            byte array to test
-     * @return <code>true</code> if all bytes are valid characters in the Base64
alphabet or if the byte array is empty;
-     *         false, otherwise
-     */
-    public static boolean isArrayByteBase64(byte[] arrayOctet) {
-        for (int i = 0; i < arrayOctet.length; i++) {
-            if (!isBase64(arrayOctet[i]) && !isWhiteSpace(arrayOctet[i])) {
-                return false;
-            }
-        }
-        return true;
-    }
-
-    /**
-     * Tests a given byte array to see if it contains only valid characters within the Base64
alphabet.
-     *
-     * @param arrayOctet
-     *            byte array to test
-     * @return <code>true</code> if any byte is a valid character in the Base64
alphabet; false herwise
-     */
-    private static boolean containsBase64Byte(byte[] arrayOctet) {
-        for (int i = 0; i < arrayOctet.length; i++) {
-            if (isBase64(arrayOctet[i])) {
-                return true;
-            }
-        }
-        return false;
-    }
-
-    /**
-     * Encodes binary data using the base64 algorithm but does not chunk the output.
-     *
-     * @param binaryData
-     *            binary data to encode
-     * @return byte[] containing Base64 characters in their UTF-8 representation.
-     */
-    public static byte[] encodeBase64(byte[] binaryData) {
-        return encodeBase64(binaryData, false);
-    }
-
-    /**
-     * Encodes binary data using the base64 algorithm into 76 character blocks separated
by CRLF.
-     *
-     * @param binaryData
-     *            binary data to encode
-     * @return String containing Base64 characters.
-     * @since 1.4
-     */
-    public static String encodeBase64String(byte[] binaryData) {
-        return Utf8.toString(encodeBase64(binaryData, true));
-    }
-
-    /**
-     * Encodes binary data using a URL-safe variation of the base64 algorithm but does not
chunk the output. The
-     * url-safe variation emits - and _ instead of + and / characters.
-     *
-     * @param binaryData
-     *            binary data to encode
-     * @return byte[] containing Base64 characters in their UTF-8 representation.
-     * @since 1.4
-     */
-    public static byte[] encodeBase64URLSafe(byte[] binaryData) {
-        return encodeBase64(binaryData, false, true);
-    }
-
-    /**
-     * Encodes binary data using a URL-safe variation of the base64 algorithm but does not
chunk the output. The
-     * url-safe variation emits - and _ instead of + and / characters.
-     *
-     * @param binaryData
-     *            binary data to encode
-     * @return String containing Base64 characters
-     * @since 1.4
-     */
-    public static String encodeBase64URLSafeString(byte[] binaryData) {
-        return Utf8.toString(encodeBase64(binaryData, false, true));
-    }
-
-    /**
-     * Encodes binary data using the base64 algorithm and chunks the encoded output into
76 character blocks
-     *
-     * @param binaryData
-     *            binary data to encode
-     * @return Base64 characters chunked in 76 character blocks
-     */
-    public static byte[] encodeBase64Chunked(byte[] binaryData) {
-        return encodeBase64(binaryData, true);
-    }
-
-    /**
-     * Decodes an Object using the base64 algorithm. This method is provided in order to
satisfy the requirements of the
-     * Decoder interface, and will throw a DecoderException if the supplied object is not
of type byte[] or String.
-     *
-     * @param pObject
-     *            Object to decode
-     * @return An object (of type byte[]) containing the binary data which corresponds to
the byte[] or String supplied.
-     */
-    public Object decode(Object pObject) {
-        if (pObject instanceof byte[]) {
-            return decode((byte[]) pObject);
-        } else if (pObject instanceof String) {
-            return decode((String) pObject);
-        } else {
-            throw new IllegalArgumentException("Parameter supplied to Base64 decode is not
a byte[] or a String");
-        }
-    }
-
-    /**
-     * Decodes a String containing containing characters in the Base64 alphabet.
-     *
-     * @param pArray
-     *            A String containing Base64 character data
-     * @return a byte array containing binary data
-     * @since 1.4
-     */
-    public byte[] decode(String pArray) {
-        return decode(Utf8.toBytes(pArray));
-    }
-
-    /**
-     * Decodes a byte[] containing containing characters in the Base64 alphabet.
-     *
-     * @param pArray
-     *            A byte array containing Base64 character data
-     * @return a byte array containing binary data
-     */
-    public byte[] decode(byte[] pArray) {
-        reset();
-        if (pArray == null || pArray.length == 0) {
-            return pArray;
-        }
-        long len = (pArray.length * 3) / 4;
-        byte[] buf = new byte[(int) len];
-        setInitialBuffer(buf, 0, buf.length);
-        decode(pArray, 0, pArray.length);
-        decode(pArray, 0, -1); // Notify decoder of EOF.
-
-        // Would be nice to just return buf (like we sometimes do in the encode
-        // logic), but we have no idea what the line-length was (could even be
-        // variable).  So we cannot determine ahead of time exactly how big an
-        // array is necessary.  Hence the need to construct a 2nd byte array to
-        // hold the final result:
-
-        byte[] result = new byte[pos];
-        readResults(result, 0, result.length);
-        return result;
-    }
-
-    /**
-     * Encodes binary data using the base64 algorithm, optionally chunking the output into
76 character blocks.
-     *
-     * @param binaryData
-     *            Array containing binary data to encode.
-     * @param isChunked
-     *            if <code>true</code> this encoder will chunk the base64 output
into 76 character blocks
-     * @return Base64-encoded data.
-     * @throws IllegalArgumentException
-     *             Thrown when the input array needs an output array bigger than {@link Integer#MAX_VALUE}
-     */
-    public static byte[] encodeBase64(byte[] binaryData, boolean isChunked) {
-        return encodeBase64(binaryData, isChunked, false);
-    }
-
-    /**
-     * Encodes binary data using the base64 algorithm, optionally chunking the output into
76 character blocks.
-     *
-     * @param binaryData
-     *            Array containing binary data to encode.
-     * @param isChunked
-     *            if <code>true</code> this encoder will chunk the base64 output
into 76 character blocks
-     * @param urlSafe
-     *            if <code>true</code> this encoder will emit - and _ instead
of the usual + and / characters.
-     * @return Base64-encoded data.
-     * @throws IllegalArgumentException
-     *             Thrown when the input array needs an output array bigger than {@link Integer#MAX_VALUE}
-     * @since 1.4
-     */
-    public static byte[] encodeBase64(byte[] binaryData, boolean isChunked, boolean urlSafe)
{
-        return encodeBase64(binaryData, isChunked, urlSafe, Integer.MAX_VALUE);
-    }
-
-    /**
-     * Encodes binary data using the base64 algorithm, optionally chunking the output into
76 character blocks.
-     *
-     * @param binaryData
-     *            Array containing binary data to encode.
-     * @param isChunked
-     *            if <code>true</code> this encoder will chunk the base64 output
into 76 character blocks
-     * @param urlSafe
-     *            if <code>true</code> this encoder will emit - and _ instead
of the usual + and / characters.
-     * @param maxResultSize
-     *            The maximum result size to accept.
-     * @return Base64-encoded data.
-     * @throws IllegalArgumentException
-     *             Thrown when the input array needs an output array bigger than maxResultSize
-     * @since 1.4
-     */
-    public static byte[] encodeBase64(byte[] binaryData, boolean isChunked, boolean urlSafe,
int maxResultSize) {
-        if (binaryData == null || binaryData.length == 0) {
-            return binaryData;
-        }
-
-        long len = getEncodeLength(binaryData, CHUNK_SIZE, CHUNK_SEPARATOR);
-        if (len > maxResultSize) {
-            throw new IllegalArgumentException("Input array too big, the output array would
be bigger ("
-                    + len + ") than the specified maxium size of " + maxResultSize);
-        }
-
-        Base64 b64 = isChunked ? new Base64(urlSafe) : new Base64(0, CHUNK_SEPARATOR, urlSafe);
-        return b64.encode(binaryData);
-    }
-
-    /**
-     * Decodes a Base64 String into octets
-     *
-     * @param base64String
-     *            String containing Base64 data
-     * @return Array containing decoded data.
-     * @since 1.4
-     */
-    public static byte[] decodeBase64(String base64String) {
-        return new Base64().decode(base64String);
-    }
-
-    /**
-     * Decodes Base64 data into octets
-     *
-     * @param base64Data
-     *            Byte array containing Base64 data
-     * @return Array containing decoded data.
-     */
-    public static byte[] decodeBase64(byte[] base64Data) {
-        return new Base64().decode(base64Data);
-    }
-
-    /**
-     * Discards any whitespace from a base-64 encoded block.
-     *
-     * @param data
-     *            The base-64 encoded data to discard the whitespace from.
-     * @return The data, less whitespace (see RFC 2045).
-     * @deprecated This method is no longer needed
-     */
-    static byte[] discardWhitespace(byte[] data) {
-        byte[] groomedData = new byte[data.length];
-        int bytesCopied = 0;
-        for (int i = 0; i < data.length; i++) {
-            switch (data[i]) {
-                case ' ' :
-                case '\n' :
-                case '\r' :
-                case '\t' :
-                    break;
-                default :
-                    groomedData[bytesCopied++] = data[i];
-            }
-        }
-        byte[] packedData = new byte[bytesCopied];
-        System.arraycopy(groomedData, 0, packedData, 0, bytesCopied);
-        return packedData;
-    }
-
-    /**
-     * Checks if a byte value is whitespace or not.
-     *
-     * @param byteToCheck
-     *            the byte to check
-     * @return true if byte is whitespace, false otherwise
-     */
-    private static boolean isWhiteSpace(byte byteToCheck) {
-        switch (byteToCheck) {
-            case ' ' :
-            case '\n' :
-            case '\r' :
-            case '\t' :
-                return true;
-            default :
-                return false;
-        }
-    }
-
-    // Implementation of the Encoder Interface
-
-    /**
-     * Encodes an Object using the base64 algorithm. This method is provided in order to
satisfy the requirements of the
-     * Encoder interface, and will throw an EncoderException if the supplied object is not
of type byte[].
-     *
-     * @param pObject
-     *            Object to encode
-     * @return An object (of type byte[]) containing the base64 encoded data which corresponds
to the byte[] supplied.
-     */
-    public Object encode(Object pObject) {
-        if (!(pObject instanceof byte[])) {
-            throw new IllegalArgumentException("Parameter supplied to Base64 encode is not
a byte[]");
-        }
-        return encode((byte[]) pObject);
-    }
-
-    /**
-     * Encodes a byte[] containing binary data, into a String containing characters in the
Base64 alphabet.
-     *
-     * @param pArray
-     *            a byte array containing binary data
-     * @return A String containing only Base64 character data
-     * @since 1.4
-     */
-    public String encodeToString(byte[] pArray) {
-        return Utf8.toString(encode(pArray));
-    }
-
-    /**
-     * Encodes a byte[] containing binary data, into a byte[] containing characters in the
Base64 alphabet.
-     *
-     * @param pArray
-     *            a byte array containing binary data
-     * @return A byte array containing only Base64 character data
-     */
-    public byte[] encode(byte[] pArray) {
-        reset();
-        if (pArray == null || pArray.length == 0) {
-            return pArray;
-        }
-        long len = getEncodeLength(pArray, lineLength, lineSeparator);
-        byte[] buf = new byte[(int) len];
-        setInitialBuffer(buf, 0, buf.length);
-        encode(pArray, 0, pArray.length);
-        encode(pArray, 0, -1); // Notify encoder of EOF.
-        // Encoder might have resized, even though it was unnecessary.
-        if (buffer != buf) {
-            readResults(buf, 0, buf.length);
-        }
-        // In URL-SAFE mode we skip the padding characters, so sometimes our
-        // final length is a bit smaller.
-        if (isUrlSafe() && pos < buf.length) {
-            byte[] smallerBuf = new byte[pos];
-            System.arraycopy(buf, 0, smallerBuf, 0, pos);
-            buf = smallerBuf;
-        }
-        return buf;
-    }
-
-    /**
-     * Pre-calculates the amount of space needed to base64-encode the supplied array.
-     *
-     * @param pArray byte[] array which will later be encoded
-     * @param chunkSize line-length of the output (<= 0 means no chunking) between each
-     *        chunkSeparator (e.g. CRLF).
-     * @param chunkSeparator the sequence of bytes used to separate chunks of output (e.g.
CRLF).
-     *
-     * @return amount of space needed to encoded the supplied array.  Returns
-     *         a long since a max-len array will require Integer.MAX_VALUE + 33%.
-     */
-    private static long getEncodeLength(byte[] pArray, int chunkSize, byte[] chunkSeparator)
{
-        // base64 always encodes to multiples of 4.
-        chunkSize = (chunkSize / 4) * 4;
-
-        long len = (pArray.length * 4) / 3;
-        long mod = len % 4;
-        if (mod != 0) {
-            len += 4 - mod;
-        }
-        if (chunkSize > 0) {
-            boolean lenChunksPerfectly = len % chunkSize == 0;
-            len += (len / chunkSize) * chunkSeparator.length;
-            if (!lenChunksPerfectly) {
-                len += chunkSeparator.length;
-            }
-        }
-        return len;
-    }
-
-    // Implementation of integer encoding used for crypto
-    /**
-     * Decodes a byte64-encoded integer according to crypto standards such as W3C's XML-Signature
-     *
-     * @param pArray
-     *            a byte array containing base64 character data
-     * @return A BigInteger
-     * @since 1.4
-     */
-    public static BigInteger decodeInteger(byte[] pArray) {
-        return new BigInteger(1, decodeBase64(pArray));
-    }
-
-    /**
-     * Encodes to a byte64-encoded integer according to crypto standards such as W3C's XML-Signature
-     *
-     * @param bigInt
-     *            a BigInteger
-     * @return A byte array containing base64 character data
-     * @throws NullPointerException
-     *             if null is passed in
-     * @since 1.4
-     */
-    public static byte[] encodeInteger(BigInteger bigInt) {
-        if (bigInt == null) {
-            throw new NullPointerException("encodeInteger called with null parameter");
-        }
-        return encodeBase64(toIntegerBytes(bigInt), false);
-    }
-
-    /**
-     * Returns a byte-array representation of a <code>BigInteger</code> without
sign bit.
-     *
-     * @param bigInt
-     *            <code>BigInteger</code> to be converted
-     * @return a byte array representation of the BigInteger parameter
-     */
-    static byte[] toIntegerBytes(BigInteger bigInt) {
-        int bitlen = bigInt.bitLength();
-        // round bitlen
-        bitlen = ((bitlen + 7) >> 3) << 3;
-        byte[] bigBytes = bigInt.toByteArray();
-
-        if (bigInt.bitLength() % 8 != 0 && (bigInt.bitLength() / 8 + 1) == bitlen
/ 8) {
-            return bigBytes;
-        }
-        // set up params for copying everything but sign bit
-        int startSrc = 0;
-        int len = bigBytes.length;
-
-        // if bigInt is exactly byte-aligned, just skip signbit in copy
-        if (bigInt.bitLength() % 8 == 0) {
-            startSrc = 1;
-            len--;
-        }
-        int startDst = bitlen / 8 - len; // to pad w/ nulls as per spec
-        byte[] resizedBytes = new byte[bitlen / 8];
-        System.arraycopy(bigBytes, startSrc, resizedBytes, startDst, len);
-        return resizedBytes;
-    }
-
-    /**
-     * Resets this Base64 object to its initial newly constructed state.
-     */
-    private void reset() {
-        buffer = null;
-        pos = 0;
-        readPos = 0;
-        currentLinePos = 0;
-        modulus = 0;
-        eof = false;
-    }
-
-}


Mime
View raw message