From d7070c84cfc636287b020363db17f27865de661b Mon Sep 17 00:00:00 2001 From: Sebastian Kaspari Date: Sat, 2 Jul 2011 18:33:16 +0200 Subject: [PATCH] Shrinked version of Base64 class. Fixes #71. --- application/src/org/yaaic/tools/Base64.java | 1869 +------------------ 1 file changed, 76 insertions(+), 1793 deletions(-) diff --git a/application/src/org/yaaic/tools/Base64.java b/application/src/org/yaaic/tools/Base64.java index 1233b90..7230aff 100644 --- a/application/src/org/yaaic/tools/Base64.java +++ b/application/src/org/yaaic/tools/Base64.java @@ -1,178 +1,41 @@ +/* +Yaaic - Yet Another Android IRC Client + +Copyright 2009-2011 Sebastian Kaspari + +This file is part of Yaaic. + +Yaaic is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +Yaaic 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 for more details. + +You should have received a copy of the GNU General Public License +along with Yaaic. If not, see . + */ package org.yaaic.tools; /** - *

Encodes and decodes to and from Base64 notation.

- *

Homepage: http://iharder.net/base64.

+ * Encode bytes to Base64 notation. * - *

Example:

- * - * String encoded = Base64.encode( myByteArray ); - *
- * byte[] myByteArray = Base64.decode( encoded ); - * - *

The options parameter, which appears in a few places, is used to pass - * several pieces of information to the encoder. In the "higher level" methods such as - * encodeBytes( bytes, options ) the options parameter can be used to indicate such - * things as first gzipping the bytes before encoding them, not inserting linefeeds, - * and encoding using the URL-safe and Ordered dialects.

- * - *

Note, according to RFC3548, - * Section 2.1, implementations should not add line feeds unless explicitly told - * to do so. I've got Base64 set to this behavior now, although earlier versions - * broke lines by default.

- * - *

The constants defined in Base64 can be OR-ed together to combine options, so you - * might make a call like this:

- * - * String encoded = Base64.encodeBytes( mybytes, Base64.GZIP | Base64.DO_BREAK_LINES ); - *

to compress the data before encoding it and then making the output have newline characters.

- *

Also...

- * String encoded = Base64.encodeBytes( crazyString.getBytes() ); - * - * - * - *

- * Change Log: - *

- * - * - *

- * I am placing this code in the Public Domain. Do with it as you will. - * This software comes with no guarantees or warranties but with - * plenty of well-wishing instead! - * Please visit http://iharder.net/base64 - * periodically to check for updates or to contribute improvements. - *

+ * Modified/Shrinked version of the Base64 implementation + * by Robert Harder (http://iharder.net/base64) [Public Domain]. * * @author Robert Harder * @author rob@iharder.net - * @version 2.3.7 */ -public class Base64 +public abstract class Base64 { - - /* ******** P U B L I C F I E L D S ******** */ - - /** No options specified. Value is zero. */ - public final static int NO_OPTIONS = 0; - - /** Specify encoding in first bit. Value is one. */ - public final static int ENCODE = 1; - - - /** Specify decoding in first bit. Value is zero. */ - public final static int DECODE = 0; - - - /** Specify that data should be gzip-compressed in second bit. Value is two. */ - public final static int GZIP = 2; - - /** Specify that gzipped data should not be automatically gunzipped. */ - public final static int DONT_GUNZIP = 4; - + private final static int NO_OPTIONS = 0; /** Do break lines when encoding. Value is 8. */ - public final static int DO_BREAK_LINES = 8; + private final static int DO_BREAK_LINES = 8; /** * Encode using Base64-like encoding that is URL- and Filename-safe as described @@ -182,41 +45,26 @@ public class Base64 * or at the very least should not be called Base64 without also specifying that is * was encoded using the URL- and Filename-safe dialect. */ - public final static int URL_SAFE = 16; - + private final static int URL_SAFE = 16; /** * Encode using the special "ordered" dialect of Base64 described here: * http://www.faqs.org/qa/rfcc-1940.html. */ - public final static int ORDERED = 32; - - - /* ******** P R I V A T E F I E L D S ******** */ - + private final static int ORDERED = 32; /** Maximum line length (76) of Base64 output. */ private final static int MAX_LINE_LENGTH = 76; - /** The equals sign (=) as a byte. */ private final static byte EQUALS_SIGN = (byte)'='; - /** The new line character (\n) as a byte. */ private final static byte NEW_LINE = (byte)'\n'; - /** Preferred encoding. */ private final static String PREFERRED_ENCODING = "US-ASCII"; - - private final static byte WHITE_SPACE_ENC = -5; // Indicates white space in encoding - private final static byte EQUALS_SIGN_ENC = -1; // Indicates equals sign in encoding - - - /* ******** S T A N D A R D B A S E 6 4 A L P H A B E T ******** */ - /** The 64 valid Base64 values. */ /* Host platform me be something funny like EBCDIC, so we hardcode these values. */ private final static byte[] _STANDARD_ALPHABET = { @@ -232,48 +80,6 @@ public class Base64 (byte)'6', (byte)'7', (byte)'8', (byte)'9', (byte)'+', (byte)'/' }; - - /** - * Translates a Base64 value to either its 6-bit reconstruction value - * or a negative number indicating some other meaning. - **/ - private final static byte[] _STANDARD_DECODABET = { - -9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 0 - 8 - -5,-5, // Whitespace: Tab and Linefeed - -9,-9, // Decimal 11 - 12 - -5, // Whitespace: Carriage Return - -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 14 - 26 - -9,-9,-9,-9,-9, // Decimal 27 - 31 - -5, // Whitespace: Space - -9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 33 - 42 - 62, // Plus sign at decimal 43 - -9,-9,-9, // Decimal 44 - 46 - 63, // Slash at decimal 47 - 52,53,54,55,56,57,58,59,60,61, // Numbers zero through nine - -9,-9,-9, // Decimal 58 - 60 - -1, // Equals sign at decimal 61 - -9,-9,-9, // Decimal 62 - 64 - 0,1,2,3,4,5,6,7,8,9,10,11,12,13, // Letters 'A' through 'N' - 14,15,16,17,18,19,20,21,22,23,24,25, // Letters 'O' through 'Z' - -9,-9,-9,-9,-9,-9, // Decimal 91 - 96 - 26,27,28,29,30,31,32,33,34,35,36,37,38, // Letters 'a' through 'm' - 39,40,41,42,43,44,45,46,47,48,49,50,51, // Letters 'n' through 'z' - -9,-9,-9,-9,-9 // Decimal 123 - 127 - ,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 128 - 139 - -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 140 - 152 - -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 153 - 165 - -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 166 - 178 - -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 179 - 191 - -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 192 - 204 - -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 205 - 217 - -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 218 - 230 - -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 231 - 243 - -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9 // Decimal 244 - 255 - }; - - - /* ******** U R L S A F E B A S E 6 4 A L P H A B E T ******** */ - /** * Used in the URL- and Filename-safe dialect described in Section 4 of RFC3548: * http://www.faqs.org/rfcs/rfc3548.html. @@ -292,51 +98,6 @@ public class Base64 (byte)'6', (byte)'7', (byte)'8', (byte)'9', (byte)'-', (byte)'_' }; - /** - * Used in decoding URL- and Filename-safe dialects of Base64. - */ - private final static byte[] _URL_SAFE_DECODABET = { - -9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 0 - 8 - -5,-5, // Whitespace: Tab and Linefeed - -9,-9, // Decimal 11 - 12 - -5, // Whitespace: Carriage Return - -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 14 - 26 - -9,-9,-9,-9,-9, // Decimal 27 - 31 - -5, // Whitespace: Space - -9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 33 - 42 - -9, // Plus sign at decimal 43 - -9, // Decimal 44 - 62, // Minus sign at decimal 45 - -9, // Decimal 46 - -9, // Slash at decimal 47 - 52,53,54,55,56,57,58,59,60,61, // Numbers zero through nine - -9,-9,-9, // Decimal 58 - 60 - -1, // Equals sign at decimal 61 - -9,-9,-9, // Decimal 62 - 64 - 0,1,2,3,4,5,6,7,8,9,10,11,12,13, // Letters 'A' through 'N' - 14,15,16,17,18,19,20,21,22,23,24,25, // Letters 'O' through 'Z' - -9,-9,-9,-9, // Decimal 91 - 94 - 63, // Underscore at decimal 95 - -9, // Decimal 96 - 26,27,28,29,30,31,32,33,34,35,36,37,38, // Letters 'a' through 'm' - 39,40,41,42,43,44,45,46,47,48,49,50,51, // Letters 'n' through 'z' - -9,-9,-9,-9,-9 // Decimal 123 - 127 - ,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 128 - 139 - -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 140 - 152 - -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 153 - 165 - -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 166 - 178 - -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 179 - 191 - -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 192 - 204 - -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 205 - 217 - -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 218 - 230 - -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 231 - 243 - -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9 // Decimal 244 - 255 - }; - - - - /* ******** O R D E R E D B A S E 6 4 A L P H A B E T ******** */ - /** * I don't get the point of this technique, but someone requested it, * and it is described here: @@ -357,51 +118,6 @@ public class Base64 (byte)'v', (byte)'w', (byte)'x', (byte)'y', (byte)'z' }; - /** - * Used in decoding the "ordered" dialect of Base64. - */ - private final static byte[] _ORDERED_DECODABET = { - -9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 0 - 8 - -5,-5, // Whitespace: Tab and Linefeed - -9,-9, // Decimal 11 - 12 - -5, // Whitespace: Carriage Return - -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 14 - 26 - -9,-9,-9,-9,-9, // Decimal 27 - 31 - -5, // Whitespace: Space - -9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 33 - 42 - -9, // Plus sign at decimal 43 - -9, // Decimal 44 - 0, // Minus sign at decimal 45 - -9, // Decimal 46 - -9, // Slash at decimal 47 - 1,2,3,4,5,6,7,8,9,10, // Numbers zero through nine - -9,-9,-9, // Decimal 58 - 60 - -1, // Equals sign at decimal 61 - -9,-9,-9, // Decimal 62 - 64 - 11,12,13,14,15,16,17,18,19,20,21,22,23, // Letters 'A' through 'M' - 24,25,26,27,28,29,30,31,32,33,34,35,36, // Letters 'N' through 'Z' - -9,-9,-9,-9, // Decimal 91 - 94 - 37, // Underscore at decimal 95 - -9, // Decimal 96 - 38,39,40,41,42,43,44,45,46,47,48,49,50, // Letters 'a' through 'm' - 51,52,53,54,55,56,57,58,59,60,61,62,63, // Letters 'n' through 'z' - -9,-9,-9,-9,-9 // Decimal 123 - 127 - ,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 128 - 139 - -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 140 - 152 - -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 153 - 165 - -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 166 - 178 - -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 179 - 191 - -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 192 - 204 - -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 205 - 217 - -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 218 - 230 - -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 231 - 243 - -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9 // Decimal 244 - 255 - }; - - - /* ******** D E T E R M I N E W H I C H A L H A B E T ******** */ - - /** * Returns one of the _SOMETHING_ALPHABET byte arrays depending on * the options specified. @@ -419,56 +135,6 @@ public class Base64 } } // end getAlphabet - - /** - * Returns one of the _SOMETHING_DECODABET byte arrays depending on - * the options specified. - * It's possible, though silly, to specify ORDERED and URL_SAFE - * in which case one of them will be picked, though there is - * no guarantee as to which one will be picked. - */ - private final static byte[] getDecodabet( int options ) { - if( (options & URL_SAFE) == URL_SAFE) { - return _URL_SAFE_DECODABET; - } else if ((options & ORDERED) == ORDERED) { - return _ORDERED_DECODABET; - } else { - return _STANDARD_DECODABET; - } - } // end getAlphabet - - - - /** Defeats instantiation. */ - private Base64(){} - - - - - /* ******** E N C O D I N G M E T H O D S ******** */ - - - /** - * Encodes up to the first three bytes of array threeBytes - * and returns a four-byte array in Base64 notation. - * The actual number of significant bytes in your array is - * given by numSigBytes. - * The array threeBytes needs only be as big as - * numSigBytes. - * Code can reuse a byte array by passing a four-byte array as b4. - * - * @param b4 A reusable byte array to reduce array instantiation - * @param threeBytes the array to convert - * @param numSigBytes the number of significant bytes in your array - * @return four byte array in Base64 notation. - * @since 1.5.1 - */ - private static byte[] encode3to4( byte[] b4, byte[] threeBytes, int numSigBytes, int options ) { - encode3to4( threeBytes, 0, numSigBytes, b4, 0, options ); - return b4; - } // end encode3to4 - - /** *

Encodes up to three bytes of the array source * and writes the resulting four Base64 bytes to destination. @@ -541,167 +207,6 @@ public class Base64 } // end switch } // end encode3to4 - - - /** - * Performs Base64 encoding on the raw ByteBuffer, - * writing it to the encoded ByteBuffer. - * This is an experimental feature. Currently it does not - * pass along any options (such as {@link #DO_BREAK_LINES} - * or {@link #GZIP}. - * - * @param raw input buffer - * @param encoded output buffer - * @since 2.3 - */ - public static void encode( java.nio.ByteBuffer raw, java.nio.ByteBuffer encoded ){ - byte[] raw3 = new byte[3]; - byte[] enc4 = new byte[4]; - - while( raw.hasRemaining() ){ - int rem = Math.min(3,raw.remaining()); - raw.get(raw3,0,rem); - Base64.encode3to4(enc4, raw3, rem, Base64.NO_OPTIONS ); - encoded.put(enc4); - } // end input remaining - } - - - /** - * Performs Base64 encoding on the raw ByteBuffer, - * writing it to the encoded CharBuffer. - * This is an experimental feature. Currently it does not - * pass along any options (such as {@link #DO_BREAK_LINES} - * or {@link #GZIP}. - * - * @param raw input buffer - * @param encoded output buffer - * @since 2.3 - */ - public static void encode( java.nio.ByteBuffer raw, java.nio.CharBuffer encoded ){ - byte[] raw3 = new byte[3]; - byte[] enc4 = new byte[4]; - - while( raw.hasRemaining() ){ - int rem = Math.min(3,raw.remaining()); - raw.get(raw3,0,rem); - Base64.encode3to4(enc4, raw3, rem, Base64.NO_OPTIONS ); - for( int i = 0; i < 4; i++ ){ - encoded.put( (char)(enc4[i] & 0xFF) ); - } - } // end input remaining - } - - - - - /** - * Serializes an object and returns the Base64-encoded - * version of that serialized object. - * - *

As of v 2.3, if the object - * cannot be serialized or there is another error, - * the method will throw an java.io.IOException. This is new to v2.3! - * In earlier versions, it just returned a null value, but - * in retrospect that's a pretty poor way to handle it.

- * - * The object is not GZip-compressed before being encoded. - * - * @param serializableObject The object to encode - * @return The Base64-encoded object - * @throws java.io.IOException if there is an error - * @throws NullPointerException if serializedObject is null - * @since 1.4 - */ - public static String encodeObject( java.io.Serializable serializableObject ) - throws java.io.IOException { - return encodeObject( serializableObject, NO_OPTIONS ); - } // end encodeObject - - - - /** - * Serializes an object and returns the Base64-encoded - * version of that serialized object. - * - *

As of v 2.3, if the object - * cannot be serialized or there is another error, - * the method will throw an java.io.IOException. This is new to v2.3! - * In earlier versions, it just returned a null value, but - * in retrospect that's a pretty poor way to handle it.

- * - * The object is not GZip-compressed before being encoded. - *

- * Example options:

-     *   GZIP: gzip-compresses object before encoding it.
-     *   DO_BREAK_LINES: break lines at 76 characters
-     *
- *

- * Example: encodeObject( myObj, Base64.GZIP ) or - *

- * Example: encodeObject( myObj, Base64.GZIP | Base64.DO_BREAK_LINES ) - * - * @param serializableObject The object to encode - * @param options Specified options - * @return The Base64-encoded object - * @see Base64#GZIP - * @see Base64#DO_BREAK_LINES - * @throws java.io.IOException if there is an error - * @since 2.0 - */ - public static String encodeObject( java.io.Serializable serializableObject, int options ) - throws java.io.IOException { - - if( serializableObject == null ){ - throw new NullPointerException( "Cannot serialize a null object." ); - } // end if: null - - // Streams - java.io.ByteArrayOutputStream baos = null; - java.io.OutputStream b64os = null; - java.util.zip.GZIPOutputStream gzos = null; - java.io.ObjectOutputStream oos = null; - - - try { - // ObjectOutputStream -> (GZIP) -> Base64 -> ByteArrayOutputStream - baos = new java.io.ByteArrayOutputStream(); - b64os = new Base64.OutputStream( baos, ENCODE | options ); - if( (options & GZIP) != 0 ){ - // Gzip - gzos = new java.util.zip.GZIPOutputStream(b64os); - oos = new java.io.ObjectOutputStream( gzos ); - } else { - // Not gzipped - oos = new java.io.ObjectOutputStream( b64os ); - } - oos.writeObject( serializableObject ); - } // end try - catch( java.io.IOException e ) { - // Catch it and then throw it immediately so that - // the finally{} block is called for cleanup. - throw e; - } // end catch - finally { - try{ oos.close(); } catch( Exception e ){} - try{ gzos.close(); } catch( Exception e ){} - try{ b64os.close(); } catch( Exception e ){} - try{ baos.close(); } catch( Exception e ){} - } // end finally - - // Return value according to relevant encoding. - try { - return new String( baos.toByteArray(), PREFERRED_ENCODING ); - } // end try - catch (java.io.UnsupportedEncodingException uue){ - // Fall back to some Java default - return new String( baos.toByteArray() ); - } // end catch - - } // end encode - - - /** * Encodes a byte array into Base64 notation. * Does not GZip-compress data. @@ -723,97 +228,10 @@ public class Base64 } // end catch assert encoded != null; return encoded; - } // end encodeBytes - - + } /** * Encodes a byte array into Base64 notation. - *

- * Example options:

-     *   GZIP: gzip-compresses object before encoding it.
-     *   DO_BREAK_LINES: break lines at 76 characters
-     *     Note: Technically, this makes your encoding non-compliant.
-     *
- *

- * Example: encodeBytes( myData, Base64.GZIP ) or - *

- * Example: encodeBytes( myData, Base64.GZIP | Base64.DO_BREAK_LINES ) - * - * - *

As of v 2.3, if there is an error with the GZIP stream, - * the method will throw an java.io.IOException. This is new to v2.3! - * In earlier versions, it just returned a null value, but - * in retrospect that's a pretty poor way to handle it.

- * - * - * @param source The data to convert - * @param options Specified options - * @return The Base64-encoded data as a String - * @see Base64#GZIP - * @see Base64#DO_BREAK_LINES - * @throws java.io.IOException if there is an error - * @throws NullPointerException if source array is null - * @since 2.0 - */ - public static String encodeBytes( byte[] source, int options ) throws java.io.IOException { - return encodeBytes( source, 0, source.length, options ); - } // end encodeBytes - - - /** - * Encodes a byte array into Base64 notation. - * Does not GZip-compress data. - * - *

As of v 2.3, if there is an error, - * the method will throw an java.io.IOException. This is new to v2.3! - * In earlier versions, it just returned a null value, but - * in retrospect that's a pretty poor way to handle it.

- * - * - * @param source The data to convert - * @param off Offset in array where conversion should begin - * @param len Length of data to convert - * @return The Base64-encoded data as a String - * @throws NullPointerException if source array is null - * @throws IllegalArgumentException if source array, offset, or length are invalid - * @since 1.4 - */ - public static String encodeBytes( byte[] source, int off, int len ) { - // Since we're not going to have the GZIP encoding turned on, - // we're not going to have an java.io.IOException thrown, so - // we should not force the user to have to catch it. - String encoded = null; - try { - encoded = encodeBytes( source, off, len, NO_OPTIONS ); - } catch (java.io.IOException ex) { - assert false : ex.getMessage(); - } // end catch - assert encoded != null; - return encoded; - } // end encodeBytes - - - - /** - * Encodes a byte array into Base64 notation. - *

- * Example options:

-     *   GZIP: gzip-compresses object before encoding it.
-     *   DO_BREAK_LINES: break lines at 76 characters
-     *     Note: Technically, this makes your encoding non-compliant.
-     *
- *

- * Example: encodeBytes( myData, Base64.GZIP ) or - *

- * Example: encodeBytes( myData, Base64.GZIP | Base64.DO_BREAK_LINES ) - * - * - *

As of v 2.3, if there is an error with the GZIP stream, - * the method will throw an java.io.IOException. This is new to v2.3! - * In earlier versions, it just returned a null value, but - * in retrospect that's a pretty poor way to handle it.

- * * * @param source The data to convert * @param off Offset in array where conversion should begin @@ -837,34 +255,8 @@ public class Base64 catch (java.io.UnsupportedEncodingException uue) { return new String( encoded ); } // end catch - - } // end encodeBytes - - - - - /** - * Similar to {@link #encodeBytes(byte[])} but returns - * a byte array instead of instantiating a String. This is more efficient - * if you're working with I/O streams and have large data sets to encode. - * - * - * @param source The data to convert - * @return The Base64-encoded data as a byte[] (of ASCII characters) - * @throws NullPointerException if source array is null - * @since 2.3.1 - */ - public static byte[] encodeBytesToBytes( byte[] source ) { - byte[] encoded = null; - try { - encoded = encodeBytesToBytes( source, 0, source.length, Base64.NO_OPTIONS ); - } catch( java.io.IOException ex ) { - assert false : "IOExceptions only come from GZipping, which is turned off: " + ex.getMessage(); - } - return encoded; } - /** * Similar to {@link #encodeBytes(byte[], int, int, int)} but returns * a byte array instead of instantiating a String. This is more efficient @@ -902,1164 +294,55 @@ public class Base64 String.format( "Cannot have offset of %d and length of %d with array of length %d", off,len,source.length)); } // end if: off < 0 + boolean breakLines = (options & DO_BREAK_LINES) != 0; - - // Compress? - if( (options & GZIP) != 0 ) { - java.io.ByteArrayOutputStream baos = null; - java.util.zip.GZIPOutputStream gzos = null; - Base64.OutputStream b64os = null; - - try { - // GZip -> Base64 -> ByteArray - baos = new java.io.ByteArrayOutputStream(); - b64os = new Base64.OutputStream( baos, ENCODE | options ); - gzos = new java.util.zip.GZIPOutputStream( b64os ); - - gzos.write( source, off, len ); - gzos.close(); - } // end try - catch( java.io.IOException e ) { - // Catch it and then throw it immediately so that - // the finally{} block is called for cleanup. - throw e; - } // end catch - finally { - try{ gzos.close(); } catch( Exception e ){} - try{ b64os.close(); } catch( Exception e ){} - try{ baos.close(); } catch( Exception e ){} - } // end finally - - return baos.toByteArray(); - } // end if: compress - - // Else, don't compress. Better not to use streams at all then. - else { - boolean breakLines = (options & DO_BREAK_LINES) != 0; - - //int len43 = len * 4 / 3; - //byte[] outBuff = new byte[ ( len43 ) // Main 4:3 - // + ( (len % 3) > 0 ? 4 : 0 ) // Account for padding - // + (breakLines ? ( len43 / MAX_LINE_LENGTH ) : 0) ]; // New lines - // Try to determine more precisely how big the array needs to be. - // If we get it right, we don't have to do an array copy, and - // we save a bunch of memory. - int encLen = ( len / 3 ) * 4 + ( len % 3 > 0 ? 4 : 0 ); // Bytes needed for actual encoding - if( breakLines ){ - encLen += encLen / MAX_LINE_LENGTH; // Plus extra newline characters - } - byte[] outBuff = new byte[ encLen ]; - - - int d = 0; - int e = 0; - int len2 = len - 2; - int lineLength = 0; - for( ; d < len2; d+=3, e+=4 ) { - encode3to4( source, d+off, 3, outBuff, e, options ); - - lineLength += 4; - if( breakLines && lineLength >= MAX_LINE_LENGTH ) - { - outBuff[e+4] = NEW_LINE; - e++; - lineLength = 0; - } // end if: end of line - } // en dfor: each piece of array - - if( d < len ) { - encode3to4( source, d+off, len - d, outBuff, e, options ); - e += 4; - } // end if: some padding needed - - - // Only resize array if we didn't guess it right. - if( e <= outBuff.length - 1 ){ - // If breaking lines and the last byte falls right at - // the line length (76 bytes per line), there will be - // one extra byte, and the array will need to be resized. - // Not too bad of an estimate on array size, I'd say. - byte[] finalOut = new byte[e]; - System.arraycopy(outBuff,0, finalOut,0,e); - //System.err.println("Having to resize array from " + outBuff.length + " to " + e ); - return finalOut; - } else { - //System.err.println("No need to resize array."); - return outBuff; - } - - } // end else: don't compress - - } // end encodeBytesToBytes - - - - - - /* ******** D E C O D I N G M E T H O D S ******** */ - - - /** - * Decodes four bytes from array source - * and writes the resulting bytes (up to three of them) - * to destination. - * The source and destination arrays can be manipulated - * anywhere along their length by specifying - * srcOffset and destOffset. - * This method does not check to make sure your arrays - * are large enough to accomodate srcOffset + 4 for - * the source array or destOffset + 3 for - * the destination array. - * This method returns the actual number of bytes that - * were converted from the Base64 encoding. - *

This is the lowest level of the decoding methods with - * all possible parameters.

- * - * - * @param source the array to convert - * @param srcOffset the index where conversion begins - * @param destination the array to hold the conversion - * @param destOffset the index where output will be put - * @param options alphabet type is pulled from this (standard, url-safe, ordered) - * @return the number of decoded bytes converted - * @throws NullPointerException if source or destination arrays are null - * @throws IllegalArgumentException if srcOffset or destOffset are invalid - * or there is not enough room in the array. - * @since 1.3 - */ - private static int decode4to3( - byte[] source, int srcOffset, - byte[] destination, int destOffset, int options ) { - - // Lots of error checking and exception throwing - if( source == null ){ - throw new NullPointerException( "Source array was null." ); - } // end if - if( destination == null ){ - throw new NullPointerException( "Destination array was null." ); - } // end if - if( srcOffset < 0 || srcOffset + 3 >= source.length ){ - throw new IllegalArgumentException( String.format( - "Source array with length %d cannot have offset of %d and still process four bytes.", source.length, srcOffset ) ); - } // end if - if( destOffset < 0 || destOffset +2 >= destination.length ){ - throw new IllegalArgumentException( String.format( - "Destination array with length %d cannot have offset of %d and still store three bytes.", destination.length, destOffset ) ); - } // end if - - - byte[] DECODABET = getDecodabet( options ); - - // Example: Dk== - if( source[ srcOffset + 2] == EQUALS_SIGN ) { - // Two ways to do the same thing. Don't know which way I like best. - //int outBuff = ( ( DECODABET[ source[ srcOffset ] ] << 24 ) >>> 6 ) - // | ( ( DECODABET[ source[ srcOffset + 1] ] << 24 ) >>> 12 ); - int outBuff = ( ( DECODABET[ source[ srcOffset ] ] & 0xFF ) << 18 ) - | ( ( DECODABET[ source[ srcOffset + 1] ] & 0xFF ) << 12 ); - - destination[ destOffset ] = (byte)( outBuff >>> 16 ); - return 1; + //int len43 = len * 4 / 3; + //byte[] outBuff = new byte[ ( len43 ) // Main 4:3 + // + ( (len % 3) > 0 ? 4 : 0 ) // Account for padding + // + (breakLines ? ( len43 / MAX_LINE_LENGTH ) : 0) ]; // New lines + // Try to determine more precisely how big the array needs to be. + // If we get it right, we don't have to do an array copy, and + // we save a bunch of memory. + int encLen = ( len / 3 ) * 4 + ( len % 3 > 0 ? 4 : 0 ); // Bytes needed for actual encoding + if( breakLines ){ + encLen += encLen / MAX_LINE_LENGTH; // Plus extra newline characters } + byte[] outBuff = new byte[ encLen ]; - // Example: DkL= - else if( source[ srcOffset + 3 ] == EQUALS_SIGN ) { - // Two ways to do the same thing. Don't know which way I like best. - //int outBuff = ( ( DECODABET[ source[ srcOffset ] ] << 24 ) >>> 6 ) - // | ( ( DECODABET[ source[ srcOffset + 1 ] ] << 24 ) >>> 12 ) - // | ( ( DECODABET[ source[ srcOffset + 2 ] ] << 24 ) >>> 18 ); - int outBuff = ( ( DECODABET[ source[ srcOffset ] ] & 0xFF ) << 18 ) - | ( ( DECODABET[ source[ srcOffset + 1 ] ] & 0xFF ) << 12 ) - | ( ( DECODABET[ source[ srcOffset + 2 ] ] & 0xFF ) << 6 ); + int d = 0; + int e = 0; + int len2 = len - 2; + int lineLength = 0; + for( ; d < len2; d+=3, e+=4 ) { + encode3to4( source, d+off, 3, outBuff, e, options ); - destination[ destOffset ] = (byte)( outBuff >>> 16 ); - destination[ destOffset + 1 ] = (byte)( outBuff >>> 8 ); - return 2; - } - - // Example: DkLE - else { - // Two ways to do the same thing. Don't know which way I like best. - //int outBuff = ( ( DECODABET[ source[ srcOffset ] ] << 24 ) >>> 6 ) - // | ( ( DECODABET[ source[ srcOffset + 1 ] ] << 24 ) >>> 12 ) - // | ( ( DECODABET[ source[ srcOffset + 2 ] ] << 24 ) >>> 18 ) - // | ( ( DECODABET[ source[ srcOffset + 3 ] ] << 24 ) >>> 24 ); - int outBuff = ( ( DECODABET[ source[ srcOffset ] ] & 0xFF ) << 18 ) - | ( ( DECODABET[ source[ srcOffset + 1 ] ] & 0xFF ) << 12 ) - | ( ( DECODABET[ source[ srcOffset + 2 ] ] & 0xFF ) << 6) - | ( ( DECODABET[ source[ srcOffset + 3 ] ] & 0xFF ) ); - - - destination[ destOffset ] = (byte)( outBuff >> 16 ); - destination[ destOffset + 1 ] = (byte)( outBuff >> 8 ); - destination[ destOffset + 2 ] = (byte)( outBuff ); - - return 3; - } - } // end decodeToBytes - - - - - - /** - * Low-level access to decoding ASCII characters in - * the form of a byte array. Ignores GUNZIP option, if - * it's set. This is not generally a recommended method, - * although it is used internally as part of the decoding process. - * Special case: if len = 0, an empty array is returned. Still, - * if you need more speed and reduced memory footprint (and aren't - * gzipping), consider this method. - * - * @param source The Base64 encoded data - * @return decoded data - * @since 2.3.1 - */ - public static byte[] decode( byte[] source ) - throws java.io.IOException { - byte[] decoded = null; - // try { - decoded = decode( source, 0, source.length, Base64.NO_OPTIONS ); - // } catch( java.io.IOException ex ) { - // assert false : "IOExceptions only come from GZipping, which is turned off: " + ex.getMessage(); - // } - return decoded; - } - - - - /** - * Low-level access to decoding ASCII characters in - * the form of a byte array. Ignores GUNZIP option, if - * it's set. This is not generally a recommended method, - * although it is used internally as part of the decoding process. - * Special case: if len = 0, an empty array is returned. Still, - * if you need more speed and reduced memory footprint (and aren't - * gzipping), consider this method. - * - * @param source The Base64 encoded data - * @param off The offset of where to begin decoding - * @param len The length of characters to decode - * @param options Can specify options such as alphabet type to use - * @return decoded data - * @throws java.io.IOException If bogus characters exist in source data - * @since 1.3 - */ - public static byte[] decode( byte[] source, int off, int len, int options ) - throws java.io.IOException { - - // Lots of error checking and exception throwing - if( source == null ){ - throw new NullPointerException( "Cannot decode null source array." ); - } // end if - if( off < 0 || off + len > source.length ){ - throw new IllegalArgumentException( String.format( - "Source array with length %d cannot have offset of %d and process %d bytes.", source.length, off, len ) ); - } // end if - - if( len == 0 ){ - return new byte[0]; - }else if( len < 4 ){ - throw new IllegalArgumentException( - "Base64-encoded string must have at least four characters, but length specified was " + len ); - } // end if - - byte[] DECODABET = getDecodabet( options ); - - int len34 = len * 3 / 4; // Estimate on array size - byte[] outBuff = new byte[ len34 ]; // Upper limit on size of output - int outBuffPosn = 0; // Keep track of where we're writing - - byte[] b4 = new byte[4]; // Four byte buffer from source, eliminating white space - int b4Posn = 0; // Keep track of four byte input buffer - int i = 0; // Source array counter - byte sbiDecode = 0; // Special value from DECODABET - - for( i = off; i < off+len; i++ ) { // Loop through source - - sbiDecode = DECODABET[ source[i]&0xFF ]; - - // White space, Equals sign, or legit Base64 character - // Note the values such as -5 and -9 in the - // DECODABETs at the top of the file. - if( sbiDecode >= WHITE_SPACE_ENC ) { - if( sbiDecode >= EQUALS_SIGN_ENC ) { - b4[ b4Posn++ ] = source[i]; // Save non-whitespace - if( b4Posn > 3 ) { // Time to decode? - outBuffPosn += decode4to3( b4, 0, outBuff, outBuffPosn, options ); - b4Posn = 0; - - // If that was the equals sign, break out of 'for' loop - if( source[i] == EQUALS_SIGN ) { - break; - } // end if: equals sign - } // end if: quartet built - } // end if: equals sign or better - } // end if: white space, equals sign or better - else { - // There's a bad input character in the Base64 stream. - throw new java.io.IOException( String.format( - "Bad Base64 input character decimal %d in array position %d", (source[i])&0xFF, i ) ); - } // end else: - } // each input character - - byte[] out = new byte[ outBuffPosn ]; - System.arraycopy( outBuff, 0, out, 0, outBuffPosn ); - return out; - } // end decode - - - - - /** - * Decodes data from Base64 notation, automatically - * detecting gzip-compressed data and decompressing it. - * - * @param s the string to decode - * @return the decoded data - * @throws java.io.IOException If there is a problem - * @since 1.4 - */ - public static byte[] decode( String s ) throws java.io.IOException { - return decode( s, NO_OPTIONS ); - } - - - - /** - * Decodes data from Base64 notation, automatically - * detecting gzip-compressed data and decompressing it. - * - * @param s the string to decode - * @param options encode options such as URL_SAFE - * @return the decoded data - * @throws java.io.IOException if there is an error - * @throws NullPointerException if s is null - * @since 1.4 - */ - public static byte[] decode( String s, int options ) throws java.io.IOException { - - if( s == null ){ - throw new NullPointerException( "Input string was null." ); - } // end if - - byte[] bytes; - try { - bytes = s.getBytes( PREFERRED_ENCODING ); - } // end try - catch( java.io.UnsupportedEncodingException uee ) { - bytes = s.getBytes(); - } // end catch - // - - // Decode - bytes = decode( bytes, 0, bytes.length, options ); - - // Check to see if it's gzip-compressed - // GZIP Magic Two-Byte Number: 0x8b1f (35615) - boolean dontGunzip = (options & DONT_GUNZIP) != 0; - if( (bytes != null) && (bytes.length >= 4) && (!dontGunzip) ) { - - int head = (bytes[0] & 0xff) | ((bytes[1] << 8) & 0xff00); - if( java.util.zip.GZIPInputStream.GZIP_MAGIC == head ) { - java.io.ByteArrayInputStream bais = null; - java.util.zip.GZIPInputStream gzis = null; - java.io.ByteArrayOutputStream baos = null; - byte[] buffer = new byte[2048]; - int length = 0; - - try { - baos = new java.io.ByteArrayOutputStream(); - bais = new java.io.ByteArrayInputStream( bytes ); - gzis = new java.util.zip.GZIPInputStream( bais ); - - while( ( length = gzis.read( buffer ) ) >= 0 ) { - baos.write(buffer,0,length); - } // end while: reading input - - // No error? Get new bytes. - bytes = baos.toByteArray(); - - } // end try - catch( java.io.IOException e ) { - e.printStackTrace(); - // Just return originally-decoded bytes - } // end catch - finally { - try{ baos.close(); } catch( Exception e ){} - try{ gzis.close(); } catch( Exception e ){} - try{ bais.close(); } catch( Exception e ){} - } // end finally - - } // end if: gzipped - } // end if: bytes.length >= 2 - - return bytes; - } // end decode - - - - /** - * Attempts to decode Base64 data and deserialize a Java - * Object within. Returns null if there was an error. - * - * @param encodedObject The Base64 data to decode - * @return The decoded and deserialized object - * @throws NullPointerException if encodedObject is null - * @throws java.io.IOException if there is a general error - * @throws ClassNotFoundException if the decoded object is of a - * class that cannot be found by the JVM - * @since 1.5 - */ - public static Object decodeToObject( String encodedObject ) - throws java.io.IOException, java.lang.ClassNotFoundException { - return decodeToObject(encodedObject,NO_OPTIONS,null); - } - - - /** - * Attempts to decode Base64 data and deserialize a Java - * Object within. Returns null if there was an error. - * If loader is not null, it will be the class loader - * used when deserializing. - * - * @param encodedObject The Base64 data to decode - * @param options Various parameters related to decoding - * @param loader Optional class loader to use in deserializing classes. - * @return The decoded and deserialized object - * @throws NullPointerException if encodedObject is null - * @throws java.io.IOException if there is a general error - * @throws ClassNotFoundException if the decoded object is of a - * class that cannot be found by the JVM - * @since 2.3.4 - */ - public static Object decodeToObject( - String encodedObject, int options, final ClassLoader loader ) - throws java.io.IOException, java.lang.ClassNotFoundException { - - // Decode and gunzip if necessary - byte[] objBytes = decode( encodedObject, options ); - - java.io.ByteArrayInputStream bais = null; - java.io.ObjectInputStream ois = null; - Object obj = null; - - try { - bais = new java.io.ByteArrayInputStream( objBytes ); - - // If no custom class loader is provided, use Java's builtin OIS. - if( loader == null ){ - ois = new java.io.ObjectInputStream( bais ); - } // end if: no loader provided - - // Else make a customized object input stream that uses - // the provided class loader. - else { - ois = new java.io.ObjectInputStream(bais){ - @Override - public Class resolveClass(java.io.ObjectStreamClass streamClass) - throws java.io.IOException, ClassNotFoundException { - Class c = Class.forName(streamClass.getName(), false, loader); - if( c == null ){ - return super.resolveClass(streamClass); - } else { - return c; // Class loader knows of this class. - } // end else: not null - } // end resolveClass - }; // end ois - } // end else: no custom class loader - - obj = ois.readObject(); - } // end try - catch( java.io.IOException e ) { - throw e; // Catch and throw in order to execute finally{} - } // end catch - catch( java.lang.ClassNotFoundException e ) { - throw e; // Catch and throw in order to execute finally{} - } // end catch - finally { - try{ bais.close(); } catch( Exception e ){} - try{ ois.close(); } catch( Exception e ){} - } // end finally - - return obj; - } // end decodeObject - - - - /** - * Convenience method for encoding data to a file. - * - *

As of v 2.3, if there is a error, - * the method will throw an java.io.IOException. This is new to v2.3! - * In earlier versions, it just returned false, but - * in retrospect that's a pretty poor way to handle it.

- * - * @param dataToEncode byte array of data to encode in base64 form - * @param filename Filename for saving encoded data - * @throws java.io.IOException if there is an error - * @throws NullPointerException if dataToEncode is null - * @since 2.1 - */ - public static void encodeToFile( byte[] dataToEncode, String filename ) - throws java.io.IOException { - - if( dataToEncode == null ){ - throw new NullPointerException( "Data to encode was null." ); - } // end iff - - Base64.OutputStream bos = null; - try { - bos = new Base64.OutputStream( - new java.io.FileOutputStream( filename ), Base64.ENCODE ); - bos.write( dataToEncode ); - } // end try - catch( java.io.IOException e ) { - throw e; // Catch and throw to execute finally{} block - } // end catch: java.io.IOException - finally { - try{ bos.close(); } catch( Exception e ){} - } // end finally - - } // end encodeToFile - - - /** - * Convenience method for decoding data to a file. - * - *

As of v 2.3, if there is a error, - * the method will throw an java.io.IOException. This is new to v2.3! - * In earlier versions, it just returned false, but - * in retrospect that's a pretty poor way to handle it.

- * - * @param dataToDecode Base64-encoded data as a string - * @param filename Filename for saving decoded data - * @throws java.io.IOException if there is an error - * @since 2.1 - */ - public static void decodeToFile( String dataToDecode, String filename ) - throws java.io.IOException { - - Base64.OutputStream bos = null; - try{ - bos = new Base64.OutputStream( - new java.io.FileOutputStream( filename ), Base64.DECODE ); - bos.write( dataToDecode.getBytes( PREFERRED_ENCODING ) ); - } // end try - catch( java.io.IOException e ) { - throw e; // Catch and throw to execute finally{} block - } // end catch: java.io.IOException - finally { - try{ bos.close(); } catch( Exception e ){} - } // end finally - - } // end decodeToFile - - - - - /** - * Convenience method for reading a base64-encoded - * file and decoding it. - * - *

As of v 2.3, if there is a error, - * the method will throw an java.io.IOException. This is new to v2.3! - * In earlier versions, it just returned false, but - * in retrospect that's a pretty poor way to handle it.

- * - * @param filename Filename for reading encoded data - * @return decoded byte array - * @throws java.io.IOException if there is an error - * @since 2.1 - */ - public static byte[] decodeFromFile( String filename ) - throws java.io.IOException { - - byte[] decodedData = null; - Base64.InputStream bis = null; - try - { - // Set up some useful variables - java.io.File file = new java.io.File( filename ); - byte[] buffer = null; - int length = 0; - int numBytes = 0; - - // Check for size of file - if( file.length() > Integer.MAX_VALUE ) + lineLength += 4; + if( breakLines && lineLength >= MAX_LINE_LENGTH ) { - throw new java.io.IOException( "File is too big for this convenience method (" + file.length() + " bytes)." ); - } // end if: file too big for int index - buffer = new byte[ (int)file.length() ]; - - // Open a stream - bis = new Base64.InputStream( - new java.io.BufferedInputStream( - new java.io.FileInputStream( file ) ), Base64.DECODE ); - - // Read until done - while( ( numBytes = bis.read( buffer, length, 4096 ) ) >= 0 ) { - length += numBytes; - } // end while - - // Save in a variable to return - decodedData = new byte[ length ]; - System.arraycopy( buffer, 0, decodedData, 0, length ); - - } // end try - catch( java.io.IOException e ) { - throw e; // Catch and release to execute finally{} - } // end catch: java.io.IOException - finally { - try{ bis.close(); } catch( Exception e) {} - } // end finally - - return decodedData; - } // end decodeFromFile - - - - /** - * Convenience method for reading a binary file - * and base64-encoding it. - * - *

As of v 2.3, if there is a error, - * the method will throw an java.io.IOException. This is new to v2.3! - * In earlier versions, it just returned false, but - * in retrospect that's a pretty poor way to handle it.

- * - * @param filename Filename for reading binary data - * @return base64-encoded string - * @throws java.io.IOException if there is an error - * @since 2.1 - */ - public static String encodeFromFile( String filename ) - throws java.io.IOException { - - String encodedData = null; - Base64.InputStream bis = null; - try - { - // Set up some useful variables - java.io.File file = new java.io.File( filename ); - byte[] buffer = new byte[ Math.max((int)(file.length() * 1.4+1),40) ]; // Need max() for math on small files (v2.2.1); Need +1 for a few corner cases (v2.3.5) - int length = 0; - int numBytes = 0; - - // Open a stream - bis = new Base64.InputStream( - new java.io.BufferedInputStream( - new java.io.FileInputStream( file ) ), Base64.ENCODE ); - - // Read until done - while( ( numBytes = bis.read( buffer, length, 4096 ) ) >= 0 ) { - length += numBytes; - } // end while - - // Save in a variable to return - encodedData = new String( buffer, 0, length, Base64.PREFERRED_ENCODING ); - - } // end try - catch( java.io.IOException e ) { - throw e; // Catch and release to execute finally{} - } // end catch: java.io.IOException - finally { - try{ bis.close(); } catch( Exception e) {} - } // end finally - - return encodedData; - } // end encodeFromFile - - /** - * Reads infile and encodes it to outfile. - * - * @param infile Input file - * @param outfile Output file - * @throws java.io.IOException if there is an error - * @since 2.2 - */ - public static void encodeFileToFile( String infile, String outfile ) - throws java.io.IOException { - - String encoded = Base64.encodeFromFile( infile ); - java.io.OutputStream out = null; - try{ - out = new java.io.BufferedOutputStream( - new java.io.FileOutputStream( outfile ) ); - out.write( encoded.getBytes("US-ASCII") ); // Strict, 7-bit output. - } // end try - catch( java.io.IOException e ) { - throw e; // Catch and release to execute finally{} - } // end catch - finally { - try { out.close(); } - catch( Exception ex ){} - } // end finally - } // end encodeFileToFile - - - /** - * Reads infile and decodes it to outfile. - * - * @param infile Input file - * @param outfile Output file - * @throws java.io.IOException if there is an error - * @since 2.2 - */ - public static void decodeFileToFile( String infile, String outfile ) - throws java.io.IOException { - - byte[] decoded = Base64.decodeFromFile( infile ); - java.io.OutputStream out = null; - try{ - out = new java.io.BufferedOutputStream( - new java.io.FileOutputStream( outfile ) ); - out.write( decoded ); - } // end try - catch( java.io.IOException e ) { - throw e; // Catch and release to execute finally{} - } // end catch - finally { - try { out.close(); } - catch( Exception ex ){} - } // end finally - } // end decodeFileToFile - - - /* ******** I N N E R C L A S S I N P U T S T R E A M ******** */ - - - - /** - * A {@link Base64.InputStream} will read data from another - * java.io.InputStream, given in the constructor, - * and encode/decode to/from Base64 notation on the fly. - * - * @see Base64 - * @since 1.3 - */ - public static class InputStream extends java.io.FilterInputStream { - - private final boolean encode; // Encoding or decoding - private int position; // Current position in the buffer - private final byte[] buffer; // Small buffer holding converted data - private final int bufferLength; // Length of buffer (3 or 4) - private int numSigBytes; // Number of meaningful bytes in the buffer - private int lineLength; - private final boolean breakLines; // Break lines at less than 80 characters - private final int options; // Record options used to create the stream. - private final byte[] decodabet; // Local copies to avoid extra method calls - - - /** - * Constructs a {@link Base64.InputStream} in DECODE mode. - * - * @param in the java.io.InputStream from which to read data. - * @since 1.3 - */ - public InputStream( java.io.InputStream in ) { - this( in, DECODE ); - } // end constructor - - - /** - * Constructs a {@link Base64.InputStream} in - * either ENCODE or DECODE mode. - *

- * Valid options:

-         *   ENCODE or DECODE: Encode or Decode as data is read.
-         *   DO_BREAK_LINES: break lines at 76 characters
-         *     (only meaningful when encoding)
-         *
- *

- * Example: new Base64.InputStream( in, Base64.DECODE ) - * - * - * @param in the java.io.InputStream from which to read data. - * @param options Specified options - * @see Base64#ENCODE - * @see Base64#DECODE - * @see Base64#DO_BREAK_LINES - * @since 2.0 - */ - public InputStream( java.io.InputStream in, int options ) { - - super( in ); - this.options = options; // Record for later - this.breakLines = (options & DO_BREAK_LINES) > 0; - this.encode = (options & ENCODE) > 0; - this.bufferLength = encode ? 4 : 3; - this.buffer = new byte[ bufferLength ]; - this.position = -1; - this.lineLength = 0; - this.decodabet = getDecodabet(options); - } // end constructor - - /** - * Reads enough of the input stream to convert - * to/from Base64 and returns the next byte. - * - * @return next byte - * @since 1.3 - */ - @Override - public int read() throws java.io.IOException { - - // Do we need to get data? - if( position < 0 ) { - if( encode ) { - byte[] b3 = new byte[3]; - int numBinaryBytes = 0; - for( int i = 0; i < 3; i++ ) { - int b = in.read(); - - // If end of stream, b is -1. - if( b >= 0 ) { - b3[i] = (byte)b; - numBinaryBytes++; - } else { - break; // out of for loop - } // end else: end of stream - - } // end for: each needed input byte - - if( numBinaryBytes > 0 ) { - encode3to4( b3, 0, numBinaryBytes, buffer, 0, options ); - position = 0; - numSigBytes = 4; - } // end if: got data - else { - return -1; // Must be end of stream - } // end else - } // end if: encoding - - // Else decoding - else { - byte[] b4 = new byte[4]; - int i = 0; - for( i = 0; i < 4; i++ ) { - // Read four "meaningful" bytes: - int b = 0; - do{ b = in.read(); } - while( b >= 0 && decodabet[ b & 0x7f ] <= WHITE_SPACE_ENC ); - - if( b < 0 ) { - break; // Reads a -1 if end of stream - } // end if: end of stream - - b4[i] = (byte)b; - } // end for: each needed input byte - - if( i == 4 ) { - numSigBytes = decode4to3( b4, 0, buffer, 0, options ); - position = 0; - } // end if: got four characters - else if( i == 0 ){ - return -1; - } // end else if: also padded correctly - else { - // Must have broken out from above. - throw new java.io.IOException( "Improperly padded Base64 input." ); - } // end - - } // end else: decode - } // end else: get data - - // Got data? - if( position >= 0 ) { - // End of relevant data? - if( /*!encode &&*/ position >= numSigBytes ){ - return -1; - } // end if: got data - - if( encode && breakLines && lineLength >= MAX_LINE_LENGTH ) { - lineLength = 0; - return '\n'; - } // end if - else { - lineLength++; // This isn't important when decoding - // but throwing an extra "if" seems - // just as wasteful. - - int b = buffer[ position++ ]; - - if( position >= bufferLength ) { - position = -1; - } // end if: end - - return b & 0xFF; // This is how you "cast" a byte that's - // intended to be unsigned. - } // end else - } // end if: position >= 0 - - // Else error - else { - throw new java.io.IOException( "Error in Base64 code reading stream." ); - } // end else - } // end read - - - /** - * Calls {@link #read()} repeatedly until the end of stream - * is reached or len bytes are read. - * Returns number of bytes read into array or -1 if - * end of stream is encountered. - * - * @param dest array to hold values - * @param off offset for array - * @param len max number of bytes to read into array - * @return bytes read into array or -1 if end of stream is encountered. - * @since 1.3 - */ - @Override - public int read( byte[] dest, int off, int len ) - throws java.io.IOException { - int i; - int b; - for( i = 0; i < len; i++ ) { - b = read(); - - if( b >= 0 ) { - dest[off + i] = (byte) b; - } - else if( i == 0 ) { - return -1; - } - else { - break; // Out of 'for' loop - } // Out of 'for' loop - } // end for: each byte read - return i; - } // end read - - } // end inner class InputStream - - - - - - - /* ******** I N N E R C L A S S O U T P U T S T R E A M ******** */ - - - - /** - * A {@link Base64.OutputStream} will write data to another - * java.io.OutputStream, given in the constructor, - * and encode/decode to/from Base64 notation on the fly. - * - * @see Base64 - * @since 1.3 - */ - public static class OutputStream extends java.io.FilterOutputStream { - - private final boolean encode; - private int position; - private byte[] buffer; - private final int bufferLength; - private int lineLength; - private final boolean breakLines; - private final byte[] b4; // Scratch used in a few places - private boolean suspendEncoding; - private final int options; // Record for later - private final byte[] decodabet; // Local copies to avoid extra method calls - - /** - * Constructs a {@link Base64.OutputStream} in ENCODE mode. - * - * @param out the java.io.OutputStream to which data will be written. - * @since 1.3 - */ - public OutputStream( java.io.OutputStream out ) { - this( out, ENCODE ); - } // end constructor - - - /** - * Constructs a {@link Base64.OutputStream} in - * either ENCODE or DECODE mode. - *

- * Valid options:

-         *   ENCODE or DECODE: Encode or Decode as data is read.
-         *   DO_BREAK_LINES: don't break lines at 76 characters
-         *     (only meaningful when encoding)
-         *
- *

- * Example: new Base64.OutputStream( out, Base64.ENCODE ) - * - * @param out the java.io.OutputStream to which data will be written. - * @param options Specified options. - * @see Base64#ENCODE - * @see Base64#DECODE - * @see Base64#DO_BREAK_LINES - * @since 1.3 - */ - public OutputStream( java.io.OutputStream out, int options ) { - super( out ); - this.breakLines = (options & DO_BREAK_LINES) != 0; - this.encode = (options & ENCODE) != 0; - this.bufferLength = encode ? 3 : 4; - this.buffer = new byte[ bufferLength ]; - this.position = 0; - this.lineLength = 0; - this.suspendEncoding = false; - this.b4 = new byte[4]; - this.options = options; - this.decodabet = getDecodabet(options); - } // end constructor - - - /** - * Writes the byte to the output stream after - * converting to/from Base64 notation. - * When encoding, bytes are buffered three - * at a time before the output stream actually - * gets a write() call. - * When decoding, bytes are buffered four - * at a time. - * - * @param theByte the byte to write - * @since 1.3 - */ - @Override - public void write(int theByte) - throws java.io.IOException { - // Encoding suspended? - if( suspendEncoding ) { - this.out.write( theByte ); - return; - } // end if: supsended - - // Encode? - if( encode ) { - buffer[ position++ ] = (byte)theByte; - if( position >= bufferLength ) { // Enough to encode. - - this.out.write( encode3to4( b4, buffer, bufferLength, options ) ); - - lineLength += 4; - if( breakLines && lineLength >= MAX_LINE_LENGTH ) { - this.out.write( NEW_LINE ); - lineLength = 0; - } // end if: end of line - - position = 0; - } // end if: enough to output - } // end if: encoding - - // Else, Decoding - else { - // Meaningful Base64 character? - if( decodabet[ theByte & 0x7f ] > WHITE_SPACE_ENC ) { - buffer[ position++ ] = (byte)theByte; - if( position >= bufferLength ) { // Enough to output. - - int len = Base64.decode4to3( buffer, 0, b4, 0, options ); - out.write( b4, 0, len ); - position = 0; - } // end if: enough to output - } // end if: meaningful base64 character - else if( decodabet[ theByte & 0x7f ] != WHITE_SPACE_ENC ) { - throw new java.io.IOException( "Invalid character in Base64 data." ); - } // end else: not white space either - } // end else: decoding - } // end write - - - - /** - * Calls {@link #write(int)} repeatedly until len - * bytes are written. - * - * @param theBytes array from which to read bytes - * @param off offset for array - * @param len max number of bytes to read into array - * @since 1.3 - */ - @Override - public void write( byte[] theBytes, int off, int len ) - throws java.io.IOException { - // Encoding suspended? - if( suspendEncoding ) { - this.out.write( theBytes, off, len ); - return; - } // end if: supsended - - for( int i = 0; i < len; i++ ) { - write( theBytes[ off + i ] ); - } // end for: each byte written - - } // end write - - - - /** - * Method added by PHIL. [Thanks, PHIL. -Rob] - * This pads the buffer without closing the stream. - * @throws java.io.IOException if there's an error. - */ - public void flushBase64() throws java.io.IOException { - if( position > 0 ) { - if( encode ) { - out.write( encode3to4( b4, buffer, position, options ) ); - position = 0; - } // end if: encoding - else { - throw new java.io.IOException( "Base64 input not properly padded." ); - } // end else: decoding - } // end if: buffer partially full - - } // end flush - - - /** - * Flushes and closes (I think, in the superclass) the stream. - * - * @since 1.3 - */ - @Override - public void close() throws java.io.IOException { - // 1. Ensure that pending characters are written - flushBase64(); - - // 2. Actually close the stream - // Base class both flushes and closes. - super.close(); - - buffer = null; - out = null; - } // end close - - - - /** - * Suspends encoding of the stream. - * May be helpful if you need to embed a piece of - * base64-encoded data in a stream. - * - * @throws java.io.IOException if there's an error flushing - * @since 1.5.1 - */ - public void suspendEncoding() throws java.io.IOException { - flushBase64(); - this.suspendEncoding = true; - } // end suspendEncoding - - - /** - * Resumes encoding of the stream. - * May be helpful if you need to embed a piece of - * base64-encoded data in a stream. - * - * @since 1.5.1 - */ - public void resumeEncoding() { - this.suspendEncoding = false; - } // end resumeEncoding - - - - } // end inner class OutputStream - - -} // end class Base64 \ No newline at end of file + outBuff[e+4] = NEW_LINE; + e++; + lineLength = 0; + } // end if: end of line + } // en dfor: each piece of array + + if( d < len ) { + encode3to4( source, d+off, len - d, outBuff, e, options ); + e += 4; + } // end if: some padding needed + + // Only resize array if we didn't guess it right. + if( e <= outBuff.length - 1 ){ + // If breaking lines and the last byte falls right at + // the line length (76 bytes per line), there will be + // one extra byte, and the array will need to be resized. + // Not too bad of an estimate on array size, I'd say. + byte[] finalOut = new byte[e]; + System.arraycopy(outBuff,0, finalOut,0,e); + //System.err.println("Having to resize array from " + outBuff.length + " to " + e ); + return finalOut; + } else { + //System.err.println("No need to resize array."); + return outBuff; + } + } +} \ No newline at end of file