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Posted to slide-dev@jakarta.apache.org by re...@apache.org on 2001/04/04 20:08:33 UTC
cvs commit: jakarta-slide/src/util/org/apache/util Base64.java
remm 01/04/04 11:08:32
Modified: src/util/org/apache/util Base64.java
Log:
- Update to the new version of the Xerces Base64 encoder/decoder.
The old one had problems encoding binary content.
Revision Changes Path
1.2 +76 -49 jakarta-slide/src/util/org/apache/util/Base64.java
Index: Base64.java
===================================================================
RCS file: /home/cvs/jakarta-slide/src/util/org/apache/util/Base64.java,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -r1.1 -r1.2
--- Base64.java 2001/02/15 17:37:28 1.1
+++ Base64.java 2001/04/04 18:08:32 1.2
@@ -1,7 +1,7 @@
/*
- * $Header: /home/cvs/jakarta-slide/src/util/org/apache/util/Base64.java,v 1.1 2001/02/15 17:37:28 remm Exp $
- * $Revision: 1.1 $
- * $Date: 2001/02/15 17:37:28 $
+ * $Header: /home/cvs/jakarta-slide/src/util/org/apache/util/Base64.java,v 1.2 2001/04/04 18:08:32 remm Exp $
+ * $Revision: 1.2 $
+ * $Date: 2001/04/04 18:08:32 $
*
* ====================================================================
*
@@ -67,36 +67,35 @@
/**
* This class provides encode/decode for RFC 2045 Base64 as
- * defined by RFC 2045, N. Freed and N. Borenstein.
+ * defined by RFC 2045, N. Freed and N. Borenstein.
* RFC 2045: Multipurpose Internet Mail Extensions (MIME)
* Part One: Format of Internet Message Bodies. Reference
- * 1996 Available at: http://www.ietf.org/rfc/rfc2045.txt
+ * 1996 Available at: http://www.ietf.org/rfc/rfc2045.txt
* This class is used by XML Schema binary format validation
*
* @author Jeffrey Rodriguez
- * @version $Revision: 1.1 $ $Date: 2001/02/15 17:37:28 $
+ * @version $Id: Base64.java,v 1.2 2001/04/04 18:08:32 remm Exp $
*/
-public final class Base64 {
-
-
- static private final int BASELENGTH = 255;
- static private final int LOOKUPLENGTH = 63;
+public final class Base64 {
+ static private final int BASELENGTH = 255;
+ static private final int LOOKUPLENGTH = 64;
static private final int TWENTYFOURBITGROUP = 24;
static private final int EIGHTBIT = 8;
static private final int SIXTEENBIT = 16;
static private final int SIXBIT = 6;
static private final int FOURBYTE = 4;
-
-
- static private final byte PAD = ( byte ) '=';
- static private byte [] base64Alphabet = new byte[BASELENGTH];
+ static private final int SIGN = -128;
+ static private final byte PAD = ( byte ) '=';
+ static private final boolean fDebug = false;
+ static private byte [] base64Alphabet = new byte[BASELENGTH];
static private byte [] lookUpBase64Alphabet = new byte[LOOKUPLENGTH];
+
static {
for (int i = 0; i<BASELENGTH; i++ ) {
- base64Alphabet[i] = -1;
+ base64Alphabet[i] = -1;
}
for ( int i = 'Z'; i >= 'A'; i-- ) {
base64Alphabet[i] = (byte) (i-'A');
@@ -109,10 +108,10 @@
base64Alphabet[i] = (byte) (i-'0' + 52);
}
- base64Alphabet['+'] = 62;
+ base64Alphabet['+'] = 62;
base64Alphabet['/'] = 63;
- for (int i = 0; i<=25; i++ )
+ for (int i = 0; i<=25; i++ )
lookUpBase64Alphabet[i] = (byte) ('A'+i );
for (int i = 26, j = 0; i<=51; i++, j++ )
@@ -120,17 +119,23 @@
for (int i = 52, j = 0; i<=61; i++, j++ )
lookUpBase64Alphabet[i] = (byte) ('0' + j );
+ lookUpBase64Alphabet[62] = (byte) '+';
+ lookUpBase64Alphabet[63] = (byte) '/';
+
+ }
+ public static boolean isBase64( String isValidString ){
+ return( isArrayByteBase64( isValidString.getBytes()));
}
- static boolean isBase64( byte octect ) {
+ public static boolean isBase64( byte octect ) {
//shall we ignore white space? JEFF??
- return(octect == PAD || base64Alphabet[octect] != -1 );
+ return(octect == PAD || base64Alphabet[octect] != -1 );
}
- static boolean isArrayByteBase64( byte[] arrayOctect ) {
+ public static boolean isArrayByteBase64( byte[] arrayOctect ) {
int length = arrayOctect.length;
if ( length == 0 )
return false;
@@ -143,13 +148,13 @@
/**
* Encodes hex octects into Base64
- *
+ *
* @param binaryData Array containing binaryData
* @return Encoded Base64 array
*/
- public byte[] encode( byte[] binaryData ) {
+ public static byte[] encode( byte[] binaryData ) {
int lengthDataBits = binaryData.length*EIGHTBIT;
- int fewerThan24bits = lengthDataBits%TWENTYFOURBITGROUP;
+ int fewerThan24bits = lengthDataBits%TWENTYFOURBITGROUP;
int numberTriplets = lengthDataBits/TWENTYFOURBITGROUP;
byte encodedData[] = null;
@@ -164,22 +169,38 @@
int encodedIndex = 0;
int dataIndex = 0;
int i = 0;
+ if (fDebug ) {
+ System.out.println("number of triplets = " + numberTriplets );
+ }
for ( i = 0; i<numberTriplets; i++ ) {
dataIndex = i*3;
- b1 = binaryData[dataIndex];
+ b1 = binaryData[dataIndex];
b2 = binaryData[dataIndex + 1];
b3 = binaryData[dataIndex + 2];
+ if (fDebug) {
+ System.out.println( "b1= " + b1 +", b2= " + b2 + ", b3= " + b3 );
+ }
+
l = (byte)(b2 & 0x0f);
k = (byte)(b1 & 0x03);
encodedIndex = i*4;
- encodedData[encodedIndex] = lookUpBase64Alphabet[ b1 >>2 ];
- encodedData[encodedIndex+1] = lookUpBase64Alphabet[(b2 >>4 ) |
-( k<<4 )];
- encodedData[encodedIndex+2] = lookUpBase64Alphabet[ (l <<2 ) |
-( b3>>6)];
+ byte val1 = ((b1 & SIGN)==0)?(byte)(b1>>2):(byte)((b1)>>2^0xc0);
+
+ byte val2 = ((b2 & SIGN)==0)?(byte)(b2>>4):(byte)((b2)>>4^0xf0);
+ byte val3 = ((b3 & SIGN)==0)?(byte)(b3>>6):(byte)((b3)>>6^0xfc);
+
+ encodedData[encodedIndex] = lookUpBase64Alphabet[ val1 ];
+ if (fDebug) {
+ System.out.println( "val2 = " + val2 );
+ System.out.println( "k4 = " + (k<<4));
+ System.out.println( "vak = " + (val2 | (k<<4)));
+ }
+
+ encodedData[encodedIndex+1] = lookUpBase64Alphabet[ val2 | ( k<<4 )];
+ encodedData[encodedIndex+2] = lookUpBase64Alphabet[ (l <<2 ) | val3 ];
encodedData[encodedIndex+3] = lookUpBase64Alphabet[ b3 & 0x3f ];
}
@@ -189,8 +210,13 @@
if (fewerThan24bits == EIGHTBIT ) {
b1 = binaryData[dataIndex];
k = (byte) ( b1 &0x03 );
- encodedData[encodedIndex] = lookUpBase64Alphabet[ b1 >>2 ];
- encodedData[encodedIndex + 1] = lookUpBase64Alphabet[ k<<4 ];
+ if (fDebug ) {
+ System.out.println("b1=" + b1);
+ System.out.println("b1<<2 = " + (b1>>2) );
+ }
+ byte val1 = ((b1 & SIGN)==0)?(byte)(b1>>2):(byte)((b1)>>2^0xc0);
+ encodedData[encodedIndex] = lookUpBase64Alphabet[ val1 ];
+ encodedData[encodedIndex + 1] = lookUpBase64Alphabet[ k<<4 ];
encodedData[encodedIndex + 2] = PAD;
encodedData[encodedIndex + 3] = PAD;
} else if ( fewerThan24bits == SIXTEENBIT ) {
@@ -199,10 +225,13 @@
b2 = binaryData[dataIndex +1 ];
l = ( byte ) ( b2 &0x0f );
k = ( byte ) ( b1 &0x03 );
- encodedData[encodedIndex] = lookUpBase64Alphabet[ b1 >>2 ];
- encodedData[encodedIndex + 1] = lookUpBase64Alphabet[ (b2 >>4 )
-| ( k<<4 )];
- encodedData[encodedIndex + 2] = lookUpBase64Alphabet[ l<<2 ];
+
+ byte val1 = ((b1 & SIGN)==0)?(byte)(b1>>2):(byte)((b1)>>2^0xc0);
+ byte val2 = ((b2 & SIGN)==0)?(byte)(b2>>4):(byte)((b2)>>4^0xf0);
+
+ encodedData[encodedIndex] = lookUpBase64Alphabet[ val1 ];
+ encodedData[encodedIndex + 1] = lookUpBase64Alphabet[ val2 | ( k<<4 )];
+ encodedData[encodedIndex + 2] = lookUpBase64Alphabet[ l<<2 ];
encodedData[encodedIndex + 3] = PAD;
}
return encodedData;
@@ -211,11 +240,11 @@
/**
* Decodes Base64 data into octects
- *
+ *
* @param binaryData Byte array containing Base64 data
* @return Array containind decoded data.
*/
- public byte[] decode( byte[] base64Data ) {
+ public static byte[] decode( byte[] base64Data ) {
int numberQuadruple = base64Data.length/FOURBYTE;
byte decodedData[] = null;
byte b1=0,b2=0,b3=0, b4=0, marker0=0, marker1=0;
@@ -229,10 +258,10 @@
for (int i = 0; i<numberQuadruple; i++ ) {
dataIndex = i*4;
- marker0 = base64Data[dataIndex +2];
- marker1 = base64Data[dataIndex +3];
+ marker0 = base64Data[dataIndex +2];
+ marker1 = base64Data[dataIndex +3];
- b1 = base64Alphabet[base64Data[dataIndex]];
+ b1 = base64Alphabet[base64Data[dataIndex]];
b2 = base64Alphabet[base64Data[dataIndex +1]];
if ( marker0 != PAD && marker1 != PAD ) { //No PAD e.g 3cQl
@@ -240,20 +269,18 @@
b4 = base64Alphabet[ marker1 ];
decodedData[encodedIndex] = (byte)( b1 <<2 | b2>>4 ) ;
- decodedData[encodedIndex+1] = (byte)(((b2 & 0xf)<<4 ) |(
-(b3>>2) & 0xf) );
- decodedData[encodedIndex+2] = (byte)( b3<<6 | b4 );
+ decodedData[encodedIndex+1] = (byte)(((b2 & 0xf)<<4 ) |( (b3>>2) & 0xf) );
+ decodedData[encodedIndex+2] = (byte)( b3<<6 | b4 );
} else if ( marker0 == PAD ) { //Two PAD e.g. 3c[Pad][Pad]
- decodedData[encodedIndex] = (byte)( b1 <<2 | b2>>4 ) ;
- decodedData[encodedIndex+1] = (byte)((b2 & 0xf)<<4 );
- decodedData[encodedIndex+2] = (byte) 0;
+ decodedData[encodedIndex] = (byte)( b1 <<2 | b2>>4 ) ;
+ decodedData[encodedIndex+1] = (byte)((b2 & 0xf)<<4 );
+ decodedData[encodedIndex+2] = (byte) 0;
} else if ( marker1 == PAD ) { //One PAD e.g. 3cQ[Pad]
b3 = base64Alphabet[ marker0 ];
decodedData[encodedIndex] = (byte)( b1 <<2 | b2>>4 );
- decodedData[encodedIndex+1] = (byte)(((b2 & 0xf)<<4 ) |(
-(b3>>2) & 0xf) );
- decodedData[encodedIndex+2] = (byte)( b3<<6);
+ decodedData[encodedIndex+1] = (byte)(((b2 & 0xf)<<4 ) |( (b3>>2) & 0xf) );
+ decodedData[encodedIndex+2] = (byte)( b3<<6);
}
encodedIndex += 3;
}