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  1. #1
    enemakos is offline Member
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    Oct 2011
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    Default Help with base64.

    Hello guys , im new here and i need your help.
    I got a project for a Lineage 2 emulate server based on java coding.
    There is a java code that encoding ( Base 64 ) and has some encodes.
    What is the problem : I encrypt data but i cant decrypt it -.-
    Is there any help?
    Java Code:
    /*
     * This program 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 2, or (at your option)
     * any later version.
     *
     * This program 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 this program; if not, write to the Free Software
     * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
     * 02111-1307, USA.
     *
     * http://www.gnu.org/copyleft/gpl.html
     */
    package com.l2jfrozen.crypt;
    
    import java.io.BufferedReader;
    import java.io.IOException;
    import java.io.InputStreamReader;
    
    import com.l2jfrozen.Config;
    
    /**
     * Encodes and decodes to and from Base64 notation. The source is based on the work of Robert Harder
     * <p>
     * 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 <a
     * href="http://iharder.net/xmlizable">http://iharder.net/base64</a> periodically to check for updates or to contribute
     * improvements.
     * </p>
     * 
     * @author Robert Harder
     * @author rob@iharder.net
     * @version 2.0
     */
    public 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. */
    	public final static int ENCODE = 1;
    
    	/** Specify decoding. */
    	public final static int DECODE = 0;
    
    	/** Specify that data should be gzip-compressed. */
    	public final static int GZIP = 2;
    
    	/** Don't break lines when encoding (violates strict Base64 specification) */
    	public final static int DONT_BREAK_LINES = 8;
    
    	/* ********  P R I V A T E   F I E L D S  ******** */
    
    	/** 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 = "UTF-8";
    
    	/** The 64 valid Base64 values. */
    	private final static byte[] ALPHABET;
    	private final static byte[] _NATIVE_ALPHABET =
    	/* May be something funny like EBCDIC */
    	{
    			(byte) 'A',
    			(byte) 'B',
    			(byte) 'C',
    			(byte) 'D',
    			(byte) 'E',
    			(byte) 'F',
    			(byte) 'G',
    			(byte) 'H',
    			(byte) 'I',
    			(byte) 'J',
    			(byte) 'K',
    			(byte) 'L',
    			(byte) 'M',
    			(byte) 'N',
    			(byte) 'O',
    			(byte) 'P',
    			(byte) 'Q',
    			(byte) 'R',
    			(byte) 'S',
    			(byte) 'T',
    			(byte) 'U',
    			(byte) 'V',
    			(byte) 'W',
    			(byte) 'X',
    			(byte) 'Y',
    			(byte) 'Z',
    			(byte) 'a',
    			(byte) 'b',
    			(byte) 'c',
    			(byte) 'd',
    			(byte) 'e',
    			(byte) 'f',
    			(byte) 'g',
    			(byte) 'h',
    			(byte) 'i',
    			(byte) 'j',
    			(byte) 'k',
    			(byte) 'l',
    			(byte) 'm',
    			(byte) 'n',
    			(byte) 'o',
    			(byte) 'p',
    			(byte) 'q',
    			(byte) 'r',
    			(byte) 's',
    			(byte) 't',
    			(byte) 'u',
    			(byte) 'v',
    			(byte) 'w',
    			(byte) 'x',
    			(byte) 'y',
    			(byte) 'z',
    			(byte) '0',
    			(byte) '1',
    			(byte) '2',
    			(byte) '3',
    			(byte) '4',
    			(byte) '5',
    			(byte) '6',
    			(byte) '7',
    			(byte) '8',
    			(byte) '9',
    			(byte) '+',
    			(byte) '/'
    	};
    
    	public static void main(String[] args) throws IOException
    	{
    		BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
    		System.out.print("Enter String to encode: ");
    		System.out.println(Base64.encodeBytes(bf.readLine().getBytes()));
    	}
    
    	/** Determine which ALPHABET to use. */
    	static
    	{
    		byte[] __bytes;
    		try
    		{
    			__bytes = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".getBytes(PREFERRED_ENCODING);
    		} // end try
    		catch(java.io.UnsupportedEncodingException use)
    		{
    			__bytes = _NATIVE_ALPHABET; // Fall back to native encoding
    		} // end catch
    		ALPHABET = __bytes;
    	} // end static
    
    	/**
    	 * Translates a Base64 value to either its 6-bit reconstruction value or a negative number indicating some other
    	 * meaning.
    	 **/
    	final static byte[] 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
    	// Decimal 123 - 126
    	/*,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,     // Decimal 127 - 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 */
    	};
    
    	//private final static byte BAD_ENCODING    = -9; // Indicates error in encoding
    	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
    
    	/** Defeats instantiation. */
    	private Base64()
    	{}
    
    	/* ********  E N C O D I N G   M E T H O D S  ******** */
    
    	//    /**
    	//     * Encodes the first three bytes of array <var>threeBytes</var>
    	//     * and returns a four-byte array in Base64 notation.
    	//     *
    	//     * @param threeBytes the array to convert
    	//     * @return four byte array in Base64 notation.
    	//     * @since 1.3
    	//     */
    	//    private static byte[] encode3to4( byte[] threeBytes )
    	//    {
    	//        return encode3to4( threeBytes, 3 );
    	//    }   // end encodeToBytes
    
    	//    /**
    	//     * Encodes up to the first three bytes of array <var>threeBytes</var>
    	//     * and returns a four-byte array in Base64 notation.
    	//     * The actual number of significant bytes in your array is
    	//     * given by <var>numSigBytes</var>.
    	//     * The array <var>threeBytes</var> needs only be as big as
    	//     * <var>numSigBytes</var>.
    	//     *
    	//     * @param threeBytes the array to convert
    	//     * @param numSigBytes the number of significant bytes in your array
    	//     * @return four byte array in Base64 notation.
    	//     * @since 1.3
    	//     */
    	//    private static byte[] encode3to4( byte[] threeBytes, int numSigBytes )
    	//    {
    	//        byte[] dest = new byte[4];
    	//        encode3to4( threeBytes, 0, numSigBytes, dest, 0 );
    	//        return dest;
    	//    }
    	/**
    	 * Encodes up to the first three bytes of array <var>threeBytes</var> and returns a four-byte array in Base64
    	 * notation. The actual number of significant bytes in your array is given by <var>numSigBytes</var>. The array
    	 * <var>threeBytes</var> needs only be as big as <var>numSigBytes</var>. Code can reuse a byte array by passing a
    	 * four-byte array as <var>b4</var>.
    	 * 
    	 * @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
    	 */
    	static byte[] encode3to4(byte[] b4, byte[] threeBytes, int numSigBytes)
    	{
    		encode3to4(threeBytes, 0, numSigBytes, b4, 0);
    		return b4;
    	} // end encode3to4
    
    	/**
    	 * Encodes up to three bytes of the array <var>source</var> and writes the resulting four Base64 bytes to
    	 * <var>destination</var>. The source and destination arrays can be manipulated anywhere along their length by
    	 * specifying <var>srcOffset</var> and <var>destOffset</var>. This method does not check to make sure your arrays
    	 * are large enough to accomodate <var>srcOffset</var> + 3 for the <var>source</var> array or <var>destOffset</var>
    	 * + 4 for the <var>destination</var> array. The actual number of significant bytes in your array is given by
    	 * <var>numSigBytes</var>.
    	 * 
    	 * @param source the array to convert
    	 * @param srcOffset the index where conversion begins
    	 * @param numSigBytes the number of significant bytes in your array
    	 * @param destination the array to hold the conversion
    	 * @param destOffset the index where output will be put
    	 * @return the <var>destination</var> array
    	 * @since 1.3
    	 */
    	static byte[] encode3to4(byte[] source, int srcOffset, int numSigBytes, byte[] destination, int destOffset)
    	{
    		//           1         2         3
    		// 01234567890123456789012345678901 Bit position
    		// --------000000001111111122222222 Array position from threeBytes
    		// --------|    ||    ||    ||    | Six bit groups to index ALPHABET
    		//          >>18  >>12  >> 6  >> 0  Right shift necessary
    		//                0x3f  0x3f  0x3f  Additional AND
    
    		// Create buffer with zero-padding if there are only one or two
    		// significant bytes passed in the array.
    		// We have to shift left 24 in order to flush out the 1's that appear
    		// when Java treats a value as negative that is cast from a byte to an int.
    		int inBuff = (numSigBytes > 0 ? source[srcOffset] << 24 >>> 8 : 0) | (numSigBytes > 1 ? source[srcOffset + 1] << 24 >>> 16 : 0) | (numSigBytes > 2 ? source[srcOffset + 2] << 24 >>> 24 : 0);
    
    		switch(numSigBytes)
    		{
    			case 3:
    				destination[destOffset] = ALPHABET[(inBuff >>> 18)];
    				destination[destOffset + 1] = ALPHABET[inBuff >>> 12 & 0x3f];
    				destination[destOffset + 2] = ALPHABET[inBuff >>> 6 & 0x3f];
    				destination[destOffset + 3] = ALPHABET[inBuff & 0x3f];
    				return destination;
    
    			case 2:
    				destination[destOffset] = ALPHABET[(inBuff >>> 18)];
    				destination[destOffset + 1] = ALPHABET[inBuff >>> 12 & 0x3f];
    				destination[destOffset + 2] = ALPHABET[inBuff >>> 6 & 0x3f];
    				destination[destOffset + 3] = EQUALS_SIGN;
    				return destination;
    
    			case 1:
    				destination[destOffset] = ALPHABET[(inBuff >>> 18)];
    				destination[destOffset + 1] = ALPHABET[inBuff >>> 12 & 0x3f];
    				destination[destOffset + 2] = EQUALS_SIGN;
    				destination[destOffset + 3] = EQUALS_SIGN;
    				return destination;
    
    			default:
    				return destination;
    		} // end switch
    	} // end encode3to4
    
    	/**
    	 * Serializes an object and returns the Base64-encoded version of that serialized object. If the object cannot be
    	 * serialized or there is another error, the method will return <tt>null</tt>. The object is not GZip-compressed
    	 * before being encoded.
    	 * 
    	 * @param serializableObject The object to encode
    	 * @return The Base64-encoded object
    	 * @since 1.4
    	 */
    	public static String encodeObject(java.io.Serializable serializableObject)
    	{
    		return encodeObject(serializableObject, NO_OPTIONS);
    	} // end encodeObject
    
    	/**
    	 * Serializes an object and returns the Base64-encoded version of that serialized object. If the object cannot be
    	 * serialized or there is another error, the method will return <tt>null</tt>.
    	 * <p>
    	 * Valid options:
    	 * 
    	 * <pre>
    	 *   GZIP: gzip-compresses object before encoding it.
    	 *   DONT_BREAK_LINES: don't break lines at 76 characters
    	 *     <i>Note: Technically, this makes your encoding non-compliant.</i>
    	 * </pre>
    	 * <p>
    	 * Example: <code>encodeObject( myObj, Base64.GZIP )</code> or
    	 * <p>
    	 * Example: <code>encodeObject( myObj, Base64.GZIP | Base64.DONT_BREAK_LINES )</code>
    	 * 
    	 * @param serializableObject The object to encode
    	 * @options Specified options
    	 * @return The Base64-encoded object
    	 * @see Base64#GZIP
    	 * @see Base64#DONT_BREAK_LINES
    	 * @since 2.0
    	 */
    	public static String encodeObject(java.io.Serializable serializableObject, int options)
    	{
    		// Streams
    		java.io.ByteArrayOutputStream baos = null;
    		java.io.OutputStream b64os = null;
    		java.io.ObjectOutputStream oos = null;
    		java.util.zip.GZIPOutputStream gzos = null;
    
    		// Isolate options
    		int gzip = options & GZIP;
    		int dontBreakLines = options & DONT_BREAK_LINES;
    
    		try
    		{
    			// ObjectOutputStream -> (GZIP) -> Base64 -> ByteArrayOutputStream
    			baos = new java.io.ByteArrayOutputStream();
    			b64os = new Base64.OutputStream(baos, ENCODE | dontBreakLines);
    
    			// GZip?
    			if(gzip == GZIP)
    			{
    				gzos = new java.util.zip.GZIPOutputStream(b64os);
    				oos = new java.io.ObjectOutputStream(gzos);
    			} // end if: gzip
    			else
    			{
    				oos = new java.io.ObjectOutputStream(b64os);
    			}
    
    			oos.writeObject(serializableObject);
    		} // end try
    		catch(java.io.IOException e)
    		{
    			e.printStackTrace();
    			return null;
    		} // end catch
    		finally
    		{
    			try
    			{
    				oos.close();
    			}
    			catch(Exception e)
    			{
    				if(Config.ENABLE_ALL_EXCEPTIONS)
    					e.printStackTrace();
    			}
    			try
    			{
    				gzos.close();
    			}
    			catch(Exception e)
    			{
    				if(Config.ENABLE_ALL_EXCEPTIONS)
    					e.printStackTrace();
    			}
    			try
    			{
    				b64os.close();
    			}
    			catch(Exception e)
    			{
    				if(Config.ENABLE_ALL_EXCEPTIONS)
    					e.printStackTrace();
    			}
    			try
    			{
    				baos.close();
    			}
    			catch(Exception e)
    			{
    				if(Config.ENABLE_ALL_EXCEPTIONS)
    					e.printStackTrace();
    			}
    		} // end finally
    
    		// Return value according to relevant encoding.
    		try
    		{
    			return new String(baos.toByteArray(), PREFERRED_ENCODING);
    		} // end try
    		catch(java.io.UnsupportedEncodingException uue)
    		{
    			if(Config.ENABLE_ALL_EXCEPTIONS)
    				uue.printStackTrace();
    			
    			return new String(baos.toByteArray());
    		} // end catch
    
    	} // end encode
    
    	/**
    	 * Encodes a byte array into Base64 notation. Does not GZip-compress data.
    	 * 
    	 * @param source The data to convert
    	 * @since 1.4
    	 */
    	public static String encodeBytes(byte[] source)
    	{
    		return encodeBytes(source, 0, source.length, NO_OPTIONS);
    	} // end encodeBytes
    
    	/**
    	 * Encodes a byte array into Base64 notation.
    	 * <p>
    	 * Valid options:
    	 * 
    	 * <pre>
    	 *   GZIP: gzip-compresses object before encoding it.
    	 *   DONT_BREAK_LINES: don't break lines at 76 characters
    	 *     <i>Note: Technically, this makes your encoding non-compliant.</i>
    	 * </pre>
    	 * <p>
    	 * Example: <code>encodeBytes( myData, Base64.GZIP )</code> or
    	 * <p>
    	 * Example: <code>encodeBytes( myData, Base64.GZIP | Base64.DONT_BREAK_LINES )</code>
    	 * 
    	 * @param source The data to convert
    	 * @param options Specified options
    	 * @see Base64#GZIP
    	 * @see Base64#DONT_BREAK_LINES
    	 * @since 2.0
    	 */
    	public static String encodeBytes(byte[] source, int options)
    	{
    		return encodeBytes(source, 0, source.length, options);
    	} // end encodeBytes
    
    	/**
    	 * Encodes a byte array into Base64 notation. Does not GZip-compress data.
    	 * 
    	 * @param source The data to convert
    	 * @param off Offset in array where conversion should begin
    	 * @param len Length of data to convert
    	 * @since 1.4
    	 */
    	public static String encodeBytes(byte[] source, int off, int len)
    	{
    		return encodeBytes(source, off, len, NO_OPTIONS);
    	} // end encodeBytes
    
    	/**
    	 * Encodes a byte array into Base64 notation.
    	 * <p>
    	 * Valid options:
    	 * 
    	 * <pre>
    	 *   GZIP: gzip-compresses object before encoding it.
    	 *   DONT_BREAK_LINES: don't break lines at 76 characters
    	 *     <i>Note: Technically, this makes your encoding non-compliant.</i>
    	 * </pre>
    	 * <p>
    	 * Example: <code>encodeBytes( myData, Base64.GZIP )</code> or
    	 * <p>
    	 * Example: <code>encodeBytes( myData, Base64.GZIP | Base64.DONT_BREAK_LINES )</code>
    	 * 
    	 * @param source The data to convert
    	 * @param off Offset in array where conversion should begin
    	 * @param len Length of data to convert
    	 * @param breakLines Break lines at 80 characters or less.
    	 * @param options Specified options
    	 * @see Base64#GZIP
    	 * @see Base64#DONT_BREAK_LINES
    	 * @since 2.0
    	 */
    	public static String encodeBytes(byte[] source, int off, int len, int options)
    	{
    		// Isolate options
    		int dontBreakLines = options & DONT_BREAK_LINES;
    		int gzip = options & GZIP;
    
    		// Compress?
    		if(gzip == GZIP)
    		{
    			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 | dontBreakLines);
    				gzos = new java.util.zip.GZIPOutputStream(b64os);
    
    				gzos.write(source, off, len);
    				gzos.close();
    			} // end try
    			catch(java.io.IOException e)
    			{
    				e.printStackTrace();
    				return null;
    			} // end catch
    			finally
    			{
    				try
    				{
    					gzos.close();
    				}
    				catch(Exception e)
    				{
    					if(Config.ENABLE_ALL_EXCEPTIONS)
    						e.printStackTrace();
    				}
    				try
    				{
    					b64os.close();
    				}
    				catch(Exception e)
    				{
    					if(Config.ENABLE_ALL_EXCEPTIONS)
    						e.printStackTrace();
    				}
    				try
    				{
    					baos.close();
    				}
    				catch(Exception e)
    				{
    					if(Config.ENABLE_ALL_EXCEPTIONS)
    						e.printStackTrace();
    				}
    			} // end finally
    
    			// Return value according to relevant encoding.
    			try
    			{
    				return new String(baos.toByteArray(), PREFERRED_ENCODING);
    			} // end try
    			catch(java.io.UnsupportedEncodingException uue)
    			{
    				if(Config.ENABLE_ALL_EXCEPTIONS)
    					uue.printStackTrace();
    				
    				return new String(baos.toByteArray());
    			} // end catch
    		} // end if: compress
    
    		// Convert option to boolean in way that code likes it.
    		boolean breakLines = dontBreakLines == 0;
    
    		int len43 = len * 4 / 3;
    		byte[] outBuff = new byte[len43 + (len % 3 > 0 ? 4 : 0) // Account for padding
    				+ (breakLines ? len43 / MAX_LINE_LENGTH : 0)]; // New lines
    		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);
    
    			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);
    			e += 4;
    		} // end if: some padding needed
    
    		// Return value according to relevant encoding.
    		try
    		{
    			return new String(outBuff, 0, e, PREFERRED_ENCODING);
    		} // end try
    		catch(java.io.UnsupportedEncodingException uue)
    		{
    			if(Config.ENABLE_ALL_EXCEPTIONS)
    				uue.printStackTrace();
    			return new String(outBuff, 0, e);
    		} // end catch
    		// end else: don't compress
    
    	} // end encodeBytes
    
    	/* ********  D E C O D I N G   M E T H O D S  ******** */
    
    	//    /**
    	//     * Decodes the first four bytes of array <var>fourBytes</var>
    	//     * and returns an array up to three bytes long with the
    	//     * decoded values.
    	//     *
    	//     * @param fourBytes the array with Base64 content
    	//     * @return array with decoded values
    	//     * @since 1.3
    	//     */
    	//    private static byte[] decode4to3( byte[] fourBytes )
    	//    {
    	//        byte[] outBuff1 = new byte[3];
    	//        int    count    = decode4to3( fourBytes, 0, outBuff1, 0 );
    	//        byte[] outBuff2 = new byte[ count ];
    	//
    	//        for( int i = 0; i < count; i++ )
    	//            outBuff2[i] = outBuff1[i];
    	//
    	//        return outBuff2;
    	//    }
    
    	/**
    	 * Decodes four bytes from array <var>source</var> and writes the resulting bytes (up to three of them) to
    	 * <var>destination</var>. The source and destination arrays can be manipulated anywhere along their length by
    	 * specifying <var>srcOffset</var> and <var>destOffset</var>. This method does not check to make sure your arrays
    	 * are large enough to accomodate <var>srcOffset</var> + 4 for the <var>source</var> array or <var>destOffset</var>
    	 * + 3 for the <var>destination</var> array. This method returns the actual number of bytes that were converted from
    	 * the Base64 encoding.
    	 * 
    	 * @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
    	 * @return the number of decoded bytes converted
    	 * @since 1.3
    	 */
    	static int decode4to3(byte[] source, int srcOffset, byte[] destination, int destOffset)
    	{
    		// 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;
    		}
    
    		// 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;
    
    			destination[destOffset] = (byte) (outBuff >>> 16);
    			destination[destOffset + 1] = (byte) (outBuff >>> 8);
    			return 2;
    		}
    
    		// Example: DkLE
    		else
    		{
    			try
    			{
    				// 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;
    			}
    			catch(Exception e)
    			{
    				if(Config.ENABLE_ALL_EXCEPTIONS)
    					e.printStackTrace();
    				
    				System.out.println("" + source[srcOffset] + ": " + DECODABET[source[srcOffset]]);
    				System.out.println("" + source[srcOffset + 1] + ": " + DECODABET[source[srcOffset + 1]]);
    				System.out.println("" + source[srcOffset + 2] + ": " + DECODABET[source[srcOffset + 2]]);
    				System.out.println("" + source[srcOffset + 3] + ": " + DECODABET[source[srcOffset + 3]]);
    				return -1;
    			} //e nd catch
    		}
    	} // end decodeToBytes
    
    	/**
    	 * Very low-level access to decoding ASCII characters in the form of a byte array. Does not support automatically
    	 * gunzipping or any other "fancy" features.
    	 * 
    	 * @param source The Base64 encoded data
    	 * @param off The offset of where to begin decoding
    	 * @param len The length of characters to decode
    	 * @return decoded data
    	 * @since 1.3
    	 */
    	public static byte[] decode(byte[] source, int off, int len)
    	{
    		int len34 = len * 3 / 4;
    		byte[] outBuff = new byte[len34]; // Upper limit on size of output
    		int outBuffPosn = 0;
    
    		byte[] b4 = new byte[4];
    		int b4Posn = 0;
    		int i = 0;
    		byte sbiCrop = 0;
    		byte sbiDecode = 0;
    		for(i = off; i < off + len; i++)
    		{
    			sbiCrop = (byte) (source[i] & 0x7f); // Only the low seven bits
    			sbiDecode = DECODABET[sbiCrop];
    
    			if(sbiDecode >= WHITE_SPACE_ENC) // White space, Equals sign or better
    			{
    				if(sbiDecode >= EQUALS_SIGN_ENC)
    				{
    					b4[b4Posn++] = sbiCrop;
    					if(b4Posn > 3)
    					{
    						outBuffPosn += decode4to3(b4, 0, outBuff, outBuffPosn);
    						b4Posn = 0;
    
    						// If that was the equals sign, break out of 'for' loop
    						if(sbiCrop == EQUALS_SIGN)
    						{
    							break;
    						}
    					} // end if: quartet built
    
    				} // end if: equals sign or better
    
    			} // end if: white space, equals sign or better
    			else
    			{
    				System.err.println("Bad Base64 input character at " + i + ": " + source[i] + "(decimal)");
    				return null;
    			} // 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
    	 * @since 1.4
    	 */
    	public static byte[] decode(String s)
    	{
    		byte[] bytes;
    		try
    		{
    			bytes = s.getBytes(PREFERRED_ENCODING);
    		} // end try
    		catch(java.io.UnsupportedEncodingException uee)
    		{
    			if(Config.ENABLE_ALL_EXCEPTIONS)
    				uee.printStackTrace();
    			
    			bytes = s.getBytes();
    		} // end catch
    		//</change>
    
    		// Decode
    		bytes = decode(bytes, 0, bytes.length);
    
    		// Check to see if it's gzip-compressed
    		// GZIP Magic Two-Byte Number: 0x8b1f (35615)
    		if(bytes.length >= 2)
    		{
    
    			int head = bytes[0] & 0xff | bytes[1] << 8 & 0xff00;
    			if(bytes != null && // In case decoding returned null
    			bytes.length >= 4 && // Don't want to get ArrayIndexOutOfBounds exception
    			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)
    				{
    					// Just return originally-decoded bytes
    					if(Config.ENABLE_ALL_EXCEPTIONS)
    						e.printStackTrace();
    				} // end catch
    				finally
    				{
    					try
    					{
    						baos.close();
    					}
    					catch(Exception e)
    					{
    						if(Config.ENABLE_ALL_EXCEPTIONS)
    							e.printStackTrace();
    					}
    					try
    					{
    						gzis.close();
    					}
    					catch(Exception e)
    					{
    						if(Config.ENABLE_ALL_EXCEPTIONS)
    							e.printStackTrace();
    					}
    					try
    					{
    						bais.close();
    					}
    					catch(Exception e)
    					{
    						if(Config.ENABLE_ALL_EXCEPTIONS)
    							e.printStackTrace();
    					}
    				} // 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 <tt>null</tt> if there was an error.
    	 * 
    	 * @param encodedObject The Base64 data to decode
    	 * @return The decoded and deserialized object
    	 * @since 1.5
    	 */
    	public static Object decodeToObject(String encodedObject)
    	{
    		// Decode and gunzip if necessary
    		byte[] objBytes = decode(encodedObject);
    
    		java.io.ByteArrayInputStream bais = null;
    		java.io.ObjectInputStream ois = null;
    		Object obj = null;
    
    		try
    		{
    			bais = new java.io.ByteArrayInputStream(objBytes);
    			ois = new java.io.ObjectInputStream(bais);
    
    			obj = ois.readObject();
    		} // end try
    		catch(java.io.IOException e)
    		{
    			e.printStackTrace();
    			obj = null;
    		} // end catch
    		catch(java.lang.ClassNotFoundException e)
    		{
    			e.printStackTrace();
    			obj = null;
    		} // end catch
    		finally
    		{
    			try
    			{
    				bais.close();
    			}
    			catch(Exception e)
    			{
    				if(Config.ENABLE_ALL_EXCEPTIONS)
    					e.printStackTrace();
    			}
    			try
    			{
    				ois.close();
    			}
    			catch(Exception e)
    			{
    				if(Config.ENABLE_ALL_EXCEPTIONS)
    					e.printStackTrace();
    			}
    		} // end finally
    
    		return obj;
    	} // end decodeObject
    
    	/* ********  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 {@link java.io.InputStream}, given in the constructor,
    	 * and encode/decode to/from Base64 notation on the fly.
    	 * 
    	 * @see Base64
    	 * @see java.io.FilterInputStream
    	 * @since 1.3
    	 */
    	public static class InputStream extends java.io.FilterInputStream
    	{
    		//private int     options;        // Options specified
    		private boolean encode; // Encoding or decoding
    		private int position; // Current position in the buffer
    		private byte[] buffer; // Small buffer holding converted data
    		private int bufferLength; // Length of buffer (3 or 4)
    		private int numSigBytes; // Number of meaningful bytes in the buffer
    		private int lineLength;
    		private boolean breakLines; // Break lines at less than 80 characters
    
    		/**
    		 * Constructs a {@link Base64#InputStream} in DECODE mode.
    		 * 
    		 * @param in the {@link java.io.InputStream} from which to read data.
    		 * @since 1.3
    		 */
    		public InputStream(java.io.InputStream pIn)
    		{
    			this(pIn, DECODE);
    		} // end constructor
    
    		/**
    		 * Constructs a {@link Base64#InputStream} in either ENCODE or DECODE mode.
    		 * <p>
    		 * Valid options:
    		 * 
    		 * <pre>
    		 *   ENCODE or DECODE: Encode or Decode as data is read.
    		 *   DONT_BREAK_LINES: don't break lines at 76 characters
    		 *     (only meaningful when encoding)
    		 *     <i>Note: Technically, this makes your encoding non-compliant.</i>
    		 * </pre>
    		 * <p>
    		 * Example: <code>new Base64.InputStream( in, Base64.DECODE )</code>
    		 * 
    		 * @param in the {@link java.io.InputStream} from which to read data.
    		 * @param options Specified options
    		 * @see Base64#ENCODE
    		 * @see Base64#DECODE
    		 * @see Base64#DONT_BREAK_LINES
    		 * @since 2.0
    		 */
    		public InputStream(java.io.InputStream pIn, int options)
    		{
    			super(pIn);
    			//this.options      = options;
    			breakLines = (options & DONT_BREAK_LINES) != DONT_BREAK_LINES;
    			encode = (options & ENCODE) == ENCODE;
    			bufferLength = encode ? 4 : 3;
    			buffer = new byte[bufferLength];
    			position = -1;
    			lineLength = 0;
    		} // 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++)
    					{
    						try
    						{
    							int b = in.read();
    
    							// If end of stream, b is -1.
    							if(b >= 0)
    							{
    								b3[i] = (byte) b;
    								numBinaryBytes++;
    							} // end if: not end of stream
    
    						} // end try: read
    						catch(java.io.IOException e)
    						{
    							if(Config.ENABLE_ALL_EXCEPTIONS)
    								e.printStackTrace();
    							
    							// Only a problem if we got no data at all.
    							if(i == 0)
    								throw e;
    
    						} // end catch
    					} // end for: each needed input byte
    
    					if(numBinaryBytes > 0)
    					{
    						encode3to4(b3, 0, numBinaryBytes, buffer, 0);
    						position = 0;
    						numSigBytes = 4;
    					} // end if: got data
    					else
    						return -1;
    				} // 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
    						}
    
    						b4[i] = (byte) b;
    					} // end for: each needed input byte
    
    					if(i == 4)
    					{
    						numSigBytes = decode4to3(b4, 0, buffer, 0);
    						position = 0;
    					} // end if: got four characters
    					else if(i == 0)
    						return -1;
    					else
    						// Must have broken out from above.
    						throw new java.io.IOException("Improperly padded Base64 input.");
    
    				} // end else: decode
    			} // end else: get data
    
    			// Got data?
    			if(position >= 0)
    			{
    				// End of relevant data?
    				if( /*!encode &&*/position >= numSigBytes)
    					return -1;
    
    				if(encode && breakLines && lineLength >= MAX_LINE_LENGTH)
    				{
    					lineLength = 0;
    					return '\n';
    				} // end if
    				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;
    				}
    
    				return b & 0xFF; // This is how you "cast" a byte that's
    				// intended to be unsigned.
    				// end else
    			} // end if: position >= 0
    
    			// When JDK1.4 is more accepted, use an assertion here.
    			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 <var>len</var> 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 && i == 0 )
    				//    return -1;
    
    				if(b >= 0)
    				{
    					dest[off + i] = (byte) b;
    				}
    				else if(i == 0)
    					return -1;
    				else
    				{
    					break; // 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 {@link java.io.OutputStream}, given in the constructor,
    	 * and encode/decode to/from Base64 notation on the fly.
    	 * 
    	 * @see Base64
    	 * @see java.io.FilterOutputStream
    	 * @since 1.3
    	 */
    	public static class OutputStream extends java.io.FilterOutputStream
    	{
    		//private int     options;
    		private boolean encode;
    		private int position;
    		private byte[] buffer;
    		private int bufferLength;
    		private int lineLength;
    		private boolean breakLines;
    		private byte[] b4; // Scratch used in a few places
    		private boolean suspendEncoding;
    
    		/**
    		 * Constructs a {@link Base64#OutputStream} in ENCODE mode.
    		 * 
    		 * @param out the {@link java.io.OutputStream} to which data will be written.
    		 * @since 1.3
    		 */
    		public OutputStream(java.io.OutputStream pOut)
    		{
    			this(pOut, ENCODE);
    		} // end constructor
    
    		/**
    		 * Constructs a {@link Base64#OutputStream} in either ENCODE or DECODE mode.
    		 * <p>
    		 * Valid options:
    		 * 
    		 * <pre>
    		 *   ENCODE or DECODE: Encode or Decode as data is read.
    		 *   DONT_BREAK_LINES: don't break lines at 76 characters
    		 *     (only meaningful when encoding)
    		 *     <i>Note: Technically, this makes your encoding non-compliant.</i>
    		 * </pre>
    		 * <p>
    		 * Example: <code>new Base64.OutputStream( out, Base64.ENCODE )</code>
    		 * 
    		 * @param out the {@link java.io.OutputStream} to which data will be written.
    		 * @param options Specified options.
    		 * @see Base64#ENCODE
    		 * @see Base64#DECODE
    		 * @see Base64#DONT_BREAK_LINES
    		 * @since 1.3
    		 */
    		public OutputStream(java.io.OutputStream pOut, int options)
    		{
    			super(pOut);
    			//this.options      = options;
    			breakLines = (options & DONT_BREAK_LINES) != DONT_BREAK_LINES;
    			encode = (options & ENCODE) == ENCODE;
    			bufferLength = encode ? 3 : 4;
    			buffer = new byte[bufferLength];
    			position = 0;
    			lineLength = 0;
    			suspendEncoding = false;
    			b4 = new byte[4];
    		} // 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)
    			{
    				super.out.write(theByte);
    				return;
    			} // end if: supsended
    
    			// Encode?
    			if(encode)
    			{
    				buffer[position++] = (byte) theByte;
    				if(position >= bufferLength) // Enough to encode.
    				{
    					out.write(encode3to4(b4, buffer, bufferLength));
    
    					lineLength += 4;
    					if(breakLines && lineLength >= MAX_LINE_LENGTH)
    					{
    						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);
    						out.write(b4, 0, len);
    						//out.write( Base64.decode4to3( buffer ) );
    						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: decoding
    		} // end write
    
    		/**
    		 * Calls {@link #write} repeatedly until <var>len</var> 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)
    			{
    				super.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.
    		 */
    		public void flushBase64() throws java.io.IOException
    		{
    			if(position > 0)
    			{
    				if(encode)
    				{
    					out.write(encode3to4(b4, buffer, position));
    					position = 0;
    				} // end if: encoding
    				else
    					throw new java.io.IOException("Base64 input not properly padded.");
    			} // 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 base640-encoded data in a
    		 * stream.
    		 * 
    		 * @since 1.5.1
    		 */
    		public void suspendEncoding() throws java.io.IOException
    		{
    			flushBase64();
    			suspendEncoding = true;
    		} // end suspendEncoding
    
    		/**
    		 * Resumes encoding of the stream. May be helpful if you need to embed a piece of base640-encoded data in a
    		 * stream.
    		 * 
    		 * @since 1.5.1
    		 */
    		public void resumeEncoding()
    		{
    			suspendEncoding = false;
    		} // end resumeEncoding
    
    	} // end inner class OutputStream
    
    } // end class Base64

  2. #2
    sunde887's Avatar
    sunde887 is offline Moderator
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    Default Re: Help with base64.

    I really doubt you are going to find someone to sift through 1500 lines of code to find your problem. Try creating an http://sscce.org/

  3. #3
    enemakos is offline Member
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    Default Re: Help with base64.

    if u can just help me create a void/class or something for decoding

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