package com.planet_ink.coffee_mud.core;
public class B64Encoder
{
private B64Encoder(){};
/* Base 64 Encoding stuff */
private static byte[] ALPHABET;
public static final int NO_OPTIONS = 0;
public static final int ENCODE = 1;
public static final int DECODE = 0;
public static final int GZIP = 2;
public static final int DONT_BREAK_LINES = 8;
public static final int MAX_LINE_LENGTH = 76;
public static final byte EQUALS_SIGN = (byte)'=';
public static final byte NEW_LINE = (byte)'\n';
public static final String PREFERRED_ENCODING = "UTF-8";
public static final 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 final 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 */
};
public static final byte WHITE_SPACE_ENC = -5; // Indicates white space in encoding
public static final byte EQUALS_SIGN_ENC = -1; // Indicates equals sign in encoding
protected static byte[] encode3to4( byte[] b4, byte[] threeBytes, int numSigBytes )
{
encode3to4( threeBytes, 0, numSigBytes, b4, 0 );
return b4;
}
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
if(ALPHABET==null) ALPHABET = __bytes;
}
protected static byte[] encode3to4(byte[] source, int srcOffset, int numSigBytes,
byte[] destination, int destOffset )
{
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;
}
}
public static String B64encodeObject( java.io.Serializable serializableObject )
{
return B64encodeObject( serializableObject, NO_OPTIONS );
}
public static String B64encodeObject( java.io.Serializable serializableObject, int options )
{
java.io.ByteArrayOutputStream baos = null;
java.io.OutputStream b64os = null;
java.io.ObjectOutputStream oos = null;
java.util.zip.GZIPOutputStream gzos = null;
int gzip = (options & GZIP);
int dontBreakLines = (options & DONT_BREAK_LINES);
try
{
baos = new java.io.ByteArrayOutputStream();
b64os = new B64OutputStream( baos, ENCODE | dontBreakLines );
if( gzip == GZIP )
{
gzos = new java.util.zip.GZIPOutputStream( b64os );
oos = new java.io.ObjectOutputStream( gzos );
}
else
oos = new java.io.ObjectOutputStream( b64os );
oos.writeObject( serializableObject );
}
catch( java.io.IOException e )
{
e.printStackTrace();
return null;
}
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 ){}
}
try
{
return new String( baos.toByteArray(), PREFERRED_ENCODING );
}
catch (java.io.UnsupportedEncodingException uue)
{
return new String( baos.toByteArray() );
}
}
public static String B64encodeBytes( byte[] source )
{
return B64encodeBytes( source, 0, source.length, NO_OPTIONS );
} // end encodeBytes
public static String B64encodeBytes( byte[] source, int options )
{
return B64encodeBytes( source, 0, source.length, options );
} // end encodeBytes
public static String B64encodeBytes( byte[] source, int off, int len )
{
return B64encodeBytes( source, off, len, NO_OPTIONS );
} // end encodeBytes
public static String B64encodeBytes( byte[] source, int off, int len, int options )
{
int dontBreakLines = ( options & DONT_BREAK_LINES );
int gzip = ( options & GZIP );
if( gzip == GZIP )
{
java.io.ByteArrayOutputStream baos = null;
java.util.zip.GZIPOutputStream gzos = null;
B64OutputStream b64os = null;
try
{
baos = new java.io.ByteArrayOutputStream();
b64os = new B64OutputStream( baos, ENCODE | dontBreakLines );
gzos = new java.util.zip.GZIPOutputStream( b64os );
gzos.write( source, off, len );
gzos.close();
}
catch( java.io.IOException e )
{
e.printStackTrace();
return null;
}
finally
{
try{ gzos.close(); } catch( Exception e ){}
try{ b64os.close(); } catch( Exception e ){}
try{ baos.close(); } catch( Exception e ){}
}
try
{
return new String( baos.toByteArray(), PREFERRED_ENCODING );
}
catch (java.io.UnsupportedEncodingException uue)
{
return new String( baos.toByteArray() );
}
}
boolean breakLines = dontBreakLines == 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
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;
}
}
if( d < len )
{
encode3to4( source, d+off, len - d, outBuff, e );
e += 4;
}
try
{
return new String( outBuff, 0, e, PREFERRED_ENCODING );
}
catch (java.io.UnsupportedEncodingException uue)
{
return new String( outBuff, 0, e );
}
}
protected static int decode4to3( byte[] source, int srcOffset, byte[] destination, int destOffset )
{
if( source[ srcOffset + 2] == EQUALS_SIGN )
{
int outBuff = ( ( DECODABET[ source[ srcOffset ] ] & 0xFF ) << 18 )
| ( ( DECODABET[ source[ srcOffset + 1] ] & 0xFF ) << 12 );
destination[ destOffset ] = (byte)( outBuff >>> 16 );
return 1;
}
else if( source[ srcOffset + 3 ] == EQUALS_SIGN )
{
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;
}
else
{
try{
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){
Log.errOut("CMEncoder",e);
return -1;
}
}
}
public static byte[] B64decode( 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( sbiCrop == EQUALS_SIGN )
break;
}
}
}
else
{
System.err.println( "Bad Base64 input character at " + i + ": " + source[i] + "(decimal)" );
return null;
}
}
byte[] out = new byte[ outBuffPosn ];
System.arraycopy( outBuff, 0, out, 0, outBuffPosn );
return out;
}
public static byte[] B64decode( String s )
{
byte[] bytes;
try
{
bytes = s.getBytes( PREFERRED_ENCODING );
}
catch( java.io.UnsupportedEncodingException uee )
{
bytes = s.getBytes();
}
bytes = B64decode( bytes, 0, bytes.length );
if( bytes != null && bytes.length >= 4 )
{
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);
}
bytes = baos.toByteArray();
}
catch( java.io.IOException e )
{}
finally
{
try{ baos.close(); } catch( Exception e ){}
try{ gzis.close(); } catch( Exception e ){}
try{ bais.close(); } catch( Exception e ){}
}
}
}
return bytes;
}
public static Object B64decodeToObject( String encodedObject )
{
byte[] objBytes = B64decode( 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();
}
catch( java.io.IOException e )
{
e.printStackTrace();
obj = null;
}
catch( java.lang.ClassNotFoundException e )
{
e.printStackTrace();
obj = null;
}
finally
{
try{ bais.close(); } catch( Exception e ){}
try{ ois.close(); } catch( Exception e ){}
}
return obj;
}
public static boolean B64encodeToFile( byte[] dataToEncode, String filename )
{
boolean success = false;
B64OutputStream bos = null;
try
{
bos = new B64OutputStream(
new java.io.FileOutputStream( filename ), ENCODE );
bos.write( dataToEncode );
success = true;
}
catch( java.io.IOException e )
{
success = false;
}
finally
{
try{ bos.close(); } catch( Exception e ){}
}
return success;
}
public static boolean B64decodeToFile( String dataToDecode, String filename )
{
boolean success = false;
B64OutputStream bos = null;
try
{
bos = new B64OutputStream(
new java.io.FileOutputStream( filename ), DECODE );
bos.write( dataToDecode.getBytes( PREFERRED_ENCODING ) );
success = true;
}
catch( java.io.IOException e )
{
success = false;
}
finally
{
try{ bos.close(); } catch( Exception e ){}
}
return success;
}
public static byte[] B64decodeFromFile( String filename )
{
byte[] decodedData = null;
B64InputStream bis = null;
try
{
java.io.File file = new java.io.File( filename );
byte[] buffer = null;
int length = 0;
int numBytes = 0;
if( file.length() > Integer.MAX_VALUE )
{
System.err.println( "File is too big for this convenience method (" + file.length() + " bytes)." );
return null;
}
buffer = new byte[ (int)file.length() ];
bis = new B64InputStream(
new java.io.BufferedInputStream(
new java.io.FileInputStream( file ) ), DECODE );
while( ( numBytes = bis.read( buffer, length, 4096 ) ) >= 0 )
length += numBytes;
decodedData = new byte[ length ];
System.arraycopy( buffer, 0, decodedData, 0, length );
}
catch( java.io.IOException e )
{
System.err.println( "Error decoding from file " + filename );
}
finally
{
try{ bis.close(); } catch( Exception e) {}
}
return decodedData;
}
public static String B64encodeFromFile( String filename )
{
String encodedData = null;
B64InputStream bis = null;
try
{
java.io.File file = new java.io.File( filename );
byte[] buffer = new byte[ (int)(file.length() * 1.4) ];
int length = 0;
int numBytes = 0;
bis = new B64InputStream(
new java.io.BufferedInputStream(
new java.io.FileInputStream( file ) ), ENCODE );
while( ( numBytes = bis.read( buffer, length, 4096 ) ) >= 0 )
length += numBytes;
encodedData = new String( buffer, 0, length, PREFERRED_ENCODING );
}
catch( java.io.IOException e )
{
System.err.println( "Error encoding from file " + filename );
}
finally
{
try{ bis.close(); } catch( Exception e) {}
}
return encodedData;
}
private static class B64InputStream extends java.io.FilterInputStream
{
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
public B64InputStream( java.io.InputStream in )
{
this( in, DECODE );
}
public B64InputStream( java.io.InputStream in, int options )
{
super( in );
this.breakLines = (options & DONT_BREAK_LINES) != DONT_BREAK_LINES;
this.encode = (options & ENCODE) == ENCODE;
this.bufferLength = encode ? 4 : 3;
this.buffer = new byte[ bufferLength ];
this.position = -1;
this.lineLength = 0;
}
public int read() throws java.io.IOException
{
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( b >= 0 )
{
b3[i] = (byte)b;
numBinaryBytes++;
}
}
catch( java.io.IOException e )
{
if( i == 0 )
throw e;
}
}
if( numBinaryBytes > 0 )
{
encode3to4( b3, 0, numBinaryBytes, buffer, 0 );
position = 0;
numSigBytes = 4;
}
else
{
return -1;
}
}
else
{
byte[] b4 = new byte[4];
int i = 0;
for( i = 0; i < 4; i++ )
{
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;
}
if( i == 4 )
{
numSigBytes = decode4to3( b4, 0, buffer, 0 );
position = 0;
}
else if( i == 0 ){
return -1;
}
else
{
throw new java.io.IOException( "Improperly padded Base64 input." );
}
}
}
if( position >= 0 )
{
if( position >= numSigBytes )
return -1;
if( encode && breakLines && lineLength >= MAX_LINE_LENGTH )
{
lineLength = 0;
return '\n';
}
lineLength++;
int b = buffer[ position++ ];
if( position >= bufferLength )
position = -1;
return b & 0xFF;
}
throw new java.io.IOException( "Error in Base64 code reading stream." );
}
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;
}
return i;
}
}
private static class B64OutputStream extends java.io.FilterOutputStream
{
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;
public B64OutputStream( java.io.OutputStream out )
{
this( out, ENCODE );
}
public B64OutputStream( java.io.OutputStream out, int options )
{
super( out );
this.breakLines = (options & DONT_BREAK_LINES) != DONT_BREAK_LINES;
this.encode = (options & ENCODE) == ENCODE;
this.bufferLength = encode ? 3 : 4;
this.buffer = new byte[ bufferLength ];
this.position = 0;
this.lineLength = 0;
this.suspendEncoding = false;
this.b4 = new byte[4];
}
public void write(int theByte) throws java.io.IOException
{
if( suspendEncoding )
{
super.out.write( theByte );
return;
}
if( encode )
{
buffer[ position++ ] = (byte)theByte;
if( position >= bufferLength )
{
out.write( encode3to4( b4, buffer, bufferLength ) );
lineLength += 4;
if( breakLines && lineLength >= MAX_LINE_LENGTH )
{
out.write( NEW_LINE );
lineLength = 0;
}
position = 0;
}
}
else
{
if( DECODABET[ theByte & 0x7f ] > WHITE_SPACE_ENC )
{
buffer[ position++ ] = (byte)theByte;
if( position >= bufferLength )
{
int len = decode4to3( buffer, 0, b4, 0 );
out.write( b4, 0, len );
position = 0;
}
}
else if( DECODABET[ theByte & 0x7f ] != WHITE_SPACE_ENC )
{
throw new java.io.IOException( "Invalid character in Base64 data." );
}
}
}
public void write( byte[] theBytes, int off, int len ) throws java.io.IOException
{
if( suspendEncoding )
{
super.out.write( theBytes, off, len );
return;
}
for( int i = 0; i < len; i++ )
{
write( theBytes[ off + i ] );
}
}
public void flushBase64() throws java.io.IOException
{
if( position > 0 )
{
if( encode )
{
out.write( encode3to4( b4, buffer, position ) );
position = 0;
}
else
{
throw new java.io.IOException( "Base64 input not properly padded." );
}
}
}
public void close() throws java.io.IOException
{
flushBase64();
super.close();
buffer = null;
out = null;
}
public void suspendEncoding() throws java.io.IOException
{
flushBase64();
this.suspendEncoding = true;
}
public void resumeEncoding()
{
this.suspendEncoding = false;
}
}
}
