src/share/classes/com/sun/org/apache/xml/internal/security/utils/Base64.java
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@@ -1,24 +1,26 @@
/*
* reserved comment block
* DO NOT REMOVE OR ALTER!
*/
-/*
- * Copyright 1999-2004 The Apache Software Foundation.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
*/
package com.sun.org.apache.xml.internal.security.utils;
import java.io.BufferedReader;
import java.io.IOException;
@@ -30,38 +32,80 @@
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.Text;
-
/**
* Implementation of MIME's Base64 encoding and decoding conversions.
* Optimized code. (raw version taken from oreilly.jonathan.util,
- * and currently com.sun.org.apache.xerces.internal.ds.util.Base64)
+ * and currently org.apache.xerces.ds.util.Base64)
*
* @author Raul Benito(Of the xerces copy, and little adaptations).
* @author Anli Shundi
* @author Christian Geuer-Pollmann
- * @see <A HREF="http://www.ietf.org/rfc/rfc2045.txt">RFC 2045</A>
+ * @see <A HREF="ftp://ftp.isi.edu/in-notes/rfc2045.txt">RFC 2045</A>
* @see com.sun.org.apache.xml.internal.security.transforms.implementations.TransformBase64Decode
*/
public class Base64 {
-
/** Field BASE64DEFAULTLENGTH */
public static final int BASE64DEFAULTLENGTH = 76;
+ private static final int BASELENGTH = 255;
+ private static final int LOOKUPLENGTH = 64;
+ private static final int TWENTYFOURBITGROUP = 24;
+ private static final int EIGHTBIT = 8;
+ private static final int SIXTEENBIT = 16;
+ private static final int FOURBYTE = 4;
+ private static final int SIGN = -128;
+ private static final char PAD = '=';
+ private static final byte [] base64Alphabet = new byte[BASELENGTH];
+ private static final char [] lookUpBase64Alphabet = new char[LOOKUPLENGTH];
+
+ static {
+ for (int i = 0; i < BASELENGTH; i++) {
+ base64Alphabet[i] = -1;
+ }
+ for (int i = 'Z'; i >= 'A'; i--) {
+ base64Alphabet[i] = (byte) (i - 'A');
+ }
+ for (int i = 'z'; i>= 'a'; i--) {
+ base64Alphabet[i] = (byte) (i - 'a' + 26);
+ }
+
+ for (int i = '9'; i >= '0'; i--) {
+ base64Alphabet[i] = (byte) (i - '0' + 52);
+ }
+
+ base64Alphabet['+'] = 62;
+ base64Alphabet['/'] = 63;
+
+ for (int i = 0; i <= 25; i++) {
+ lookUpBase64Alphabet[i] = (char)('A' + i);
+ }
+
+ for (int i = 26, j = 0; i <= 51; i++, j++) {
+ lookUpBase64Alphabet[i] = (char)('a' + j);
+ }
+
+ for (int i = 52, j = 0; i <= 61; i++, j++) {
+ lookUpBase64Alphabet[i] = (char)('0' + j);
+ }
+ lookUpBase64Alphabet[62] = '+';
+ lookUpBase64Alphabet[63] = '/';
+ }
+
private Base64() {
// we don't allow instantiation
}
/**
* Returns a byte-array representation of a <code>{@link BigInteger}<code>.
- * No sign-bit is outputed.
+ * No sign-bit is output.
*
* <b>N.B.:</B> <code>{@link BigInteger}<code>'s toByteArray
- * retunrs eventually longer arrays because of the leading sign-bit.
+ * returns eventually longer arrays because of the leading sign-bit.
*
* @param big <code>BigInteger<code> to be converted
* @param bitlen <code>int<code> the desired length in bits of the representation
* @return a byte array with <code>bitlen</code> bits of <code>big</code>
*/
@@ -69,12 +113,11 @@
//round bitlen
bitlen = ((bitlen + 7) >> 3) << 3;
if (bitlen < big.bitLength()) {
- throw new IllegalArgumentException(I18n
- .translate("utils.Base64.IllegalBitlength"));
+ throw new IllegalArgumentException(I18n.translate("utils.Base64.IllegalBitlength"));
}
byte[] bigBytes = big.toByteArray();
if (((big.bitLength() % 8) != 0)
@@ -96,11 +139,10 @@
byte[] resizedBytes = new byte[bitlen / 8];
System.arraycopy(bigBytes, startSrc, resizedBytes, startDst, bigLen);
return resizedBytes;
-
}
/**
* Encode in Base64 the given <code>{@link BigInteger}<code>.
*
@@ -111,14 +153,14 @@
return encode(getBytes(big, big.bitLength()));
}
/**
* Returns a byte-array representation of a <code>{@link BigInteger}<code>.
- * No sign-bit is outputed.
+ * No sign-bit is output.
*
* <b>N.B.:</B> <code>{@link BigInteger}<code>'s toByteArray
- * retunrs eventually longer arrays because of the leading sign-bit.
+ * returns eventually longer arrays because of the leading sign-bit.
*
* @param big <code>BigInteger<code> to be converted
* @param bitlen <code>int<code> the desired length in bits of the representation
* @return a byte array with <code>bitlen</code> bits of <code>big</code>
*/
@@ -126,12 +168,11 @@
//round bitlen
bitlen = ((bitlen + 7) >> 3) << 3;
if (bitlen < big.bitLength()) {
- throw new IllegalArgumentException(I18n
- .translate("utils.Base64.IllegalBitlength"));
+ throw new IllegalArgumentException(I18n.translate("utils.Base64.IllegalBitlength"));
}
byte[] bigBytes = big.toByteArray();
if (((big.bitLength() % 8) != 0)
@@ -153,50 +194,48 @@
byte[] resizedBytes = new byte[bitlen / 8];
System.arraycopy(bigBytes, startSrc, resizedBytes, startDst, bigLen);
return resizedBytes;
-
}
/**
* Method decodeBigIntegerFromElement
*
* @param element
- * @return the biginter obtained from the node
+ * @return the biginteger obtained from the node
* @throws Base64DecodingException
*/
- public static final BigInteger decodeBigIntegerFromElement(Element element) throws Base64DecodingException
- {
+ public static final BigInteger decodeBigIntegerFromElement(Element element)
+ throws Base64DecodingException {
return new BigInteger(1, Base64.decode(element));
}
/**
* Method decodeBigIntegerFromText
*
* @param text
* @return the biginter obtained from the text node
* @throws Base64DecodingException
*/
- public static final BigInteger decodeBigIntegerFromText(Text text) throws Base64DecodingException
- {
+ public static final BigInteger decodeBigIntegerFromText(Text text)
+ throws Base64DecodingException {
return new BigInteger(1, Base64.decode(text.getData()));
}
/**
* This method takes an (empty) Element and a BigInteger and adds the
* base64 encoded BigInteger to the Element.
*
* @param element
* @param biginteger
*/
- public static final void fillElementWithBigInteger(Element element,
- BigInteger biginteger) {
+ public static final void fillElementWithBigInteger(Element element, BigInteger biginteger) {
String encodedInt = encode(biginteger);
- if (encodedInt.length() > 76) {
+ if (!XMLUtils.ignoreLineBreaks() && encodedInt.length() > BASE64DEFAULTLENGTH) {
encodedInt = "\n" + encodedInt + "\n";
}
Document doc = element.getOwnerDocument();
Text text = doc.createTextNode(encodedInt);
@@ -218,17 +257,17 @@
public static final byte[] decode(Element element) throws Base64DecodingException {
Node sibling = element.getFirstChild();
StringBuffer sb = new StringBuffer();
- while (sibling!=null) {
+ while (sibling != null) {
if (sibling.getNodeType() == Node.TEXT_NODE) {
Text t = (Text) sibling;
sb.append(t.getData());
}
- sibling=sibling.getNextSibling();
+ sibling = sibling.getNextSibling();
}
return decode(sb.toString());
}
@@ -239,13 +278,11 @@
* @param localName
* @param bytes
* @return an Element with the base64 encoded in the text.
*
*/
- public static final Element encodeToElement(Document doc, String localName,
- byte[] bytes) {
-
+ public static final Element encodeToElement(Document doc, String localName, byte[] bytes) {
Element el = XMLUtils.createElementInSignatureSpace(doc, localName);
Text text = doc.createTextNode(encode(bytes));
el.appendChild(text);
@@ -253,22 +290,19 @@
}
/**
* Method decode
*
- *
* @param base64
* @return the UTF bytes of the base64
* @throws Base64DecodingException
*
*/
- public final static byte[] decode(byte[] base64) throws Base64DecodingException {
+ public static final byte[] decode(byte[] base64) throws Base64DecodingException {
return decodeInternal(base64, -1);
}
-
-
/**
* Encode a byte array and fold lines at the standard 76th character unless
* ignore line breaks property is set.
*
* @param binaryData <code>byte[]<code> to be base64 encoded
@@ -282,86 +316,47 @@
/**
* Base64 decode the lines from the reader and return an InputStream
* with the bytes.
*
- *
* @param reader
* @return InputStream with the decoded bytes
* @exception IOException passes what the reader throws
* @throws IOException
* @throws Base64DecodingException
*/
- public final static byte[] decode(BufferedReader reader)
+ public static final byte[] decode(BufferedReader reader)
throws IOException, Base64DecodingException {
- UnsyncByteArrayOutputStream baos = new UnsyncByteArrayOutputStream();
+ byte[] retBytes = null;
+ UnsyncByteArrayOutputStream baos = null;
+ try {
+ baos = new UnsyncByteArrayOutputStream();
String line;
while (null != (line = reader.readLine())) {
byte[] bytes = decode(line);
-
baos.write(bytes);
}
-
- return baos.toByteArray();
- }
-
- 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 FOURBYTE = 4;
- static private final int SIGN = -128;
- static private final char PAD = '=';
- static final private byte [] base64Alphabet = new byte[BASELENGTH];
- static final private char [] lookUpBase64Alphabet = new char[LOOKUPLENGTH];
-
- static {
-
- for (int i = 0; i<BASELENGTH; i++) {
- base64Alphabet[i] = -1;
- }
- for (int i = 'Z'; i >= 'A'; i--) {
- base64Alphabet[i] = (byte) (i-'A');
- }
- for (int i = 'z'; i>= 'a'; i--) {
- base64Alphabet[i] = (byte) ( i-'a' + 26);
+ retBytes = baos.toByteArray();
+ } finally {
+ baos.close();
}
- for (int i = '9'; i >= '0'; i--) {
- base64Alphabet[i] = (byte) (i-'0' + 52);
- }
-
- base64Alphabet['+'] = 62;
- base64Alphabet['/'] = 63;
-
- for (int i = 0; i<=25; i++)
- lookUpBase64Alphabet[i] = (char)('A'+i);
-
- for (int i = 26, j = 0; i<=51; i++, j++)
- lookUpBase64Alphabet[i] = (char)('a'+ j);
-
- for (int i = 52, j = 0; i<=61; i++, j++)
- lookUpBase64Alphabet[i] = (char)('0' + j);
- lookUpBase64Alphabet[62] = '+';
- lookUpBase64Alphabet[63] = '/';
-
+ return retBytes;
}
protected static final boolean isWhiteSpace(byte octect) {
return (octect == 0x20 || octect == 0xd || octect == 0xa || octect == 0x9);
}
protected static final boolean isPad(byte octect) {
return (octect == PAD);
}
-
/**
- * Encodes hex octects into Base64
+ * Encodes hex octets into Base64
*
* @param binaryData Array containing binaryData
* @return Encoded Base64 array
*/
/**
@@ -371,423 +366,433 @@
* @param binaryData <code>byte[]</code> data to be encoded
* @param length <code>int<code> length of wrapped lines; No wrapping if less than 4.
* @return a <code>String</code> with encoded data
*/
public static final String encode(byte[] binaryData,int length) {
-
- if (length<4) {
- length=Integer.MAX_VALUE;
+ if (length < 4) {
+ length = Integer.MAX_VALUE;
}
- if (binaryData == null)
+ if (binaryData == null) {
return null;
+ }
- int lengthDataBits = binaryData.length*EIGHTBIT;
+ int lengthDataBits = binaryData.length * EIGHTBIT;
if (lengthDataBits == 0) {
return "";
}
- int fewerThan24bits = lengthDataBits%TWENTYFOURBITGROUP;
- int numberTriplets = lengthDataBits/TWENTYFOURBITGROUP;
- int numberQuartet = fewerThan24bits != 0 ? numberTriplets+1 : numberTriplets;
- int quartesPerLine = length/4;
- int numberLines = (numberQuartet-1)/quartesPerLine;
+ int fewerThan24bits = lengthDataBits % TWENTYFOURBITGROUP;
+ int numberTriplets = lengthDataBits / TWENTYFOURBITGROUP;
+ int numberQuartet = fewerThan24bits != 0 ? numberTriplets + 1 : numberTriplets;
+ int quartesPerLine = length / 4;
+ int numberLines = (numberQuartet - 1) / quartesPerLine;
char encodedData[] = null;
- encodedData = new char[numberQuartet*4+numberLines];
-
- byte k=0, l=0, b1=0,b2=0,b3=0;
+ encodedData = new char[numberQuartet * 4 + numberLines];
+ byte k = 0, l = 0, b1 = 0, b2 = 0, b3 = 0;
int encodedIndex = 0;
int dataIndex = 0;
int i = 0;
-
for (int line = 0; line < numberLines; line++) {
for (int quartet = 0; quartet < 19; quartet++) {
b1 = binaryData[dataIndex++];
b2 = binaryData[dataIndex++];
b3 = binaryData[dataIndex++];
-
l = (byte)(b2 & 0x0f);
k = (byte)(b1 & 0x03);
- byte val1 = ((b1 & SIGN)==0)?(byte)(b1>>2):(byte)((b1)>>2^0xc0);
+ 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);
+ 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 ];
- encodedData[encodedIndex++] = lookUpBase64Alphabet[ val2 | ( k<<4 )];
- encodedData[encodedIndex++] = lookUpBase64Alphabet[ (l <<2 ) | val3 ];
- encodedData[encodedIndex++] = lookUpBase64Alphabet[ b3 & 0x3f ];
+ encodedData[encodedIndex++] = lookUpBase64Alphabet[val1];
+ encodedData[encodedIndex++] = lookUpBase64Alphabet[val2 | (k << 4)];
+ encodedData[encodedIndex++] = lookUpBase64Alphabet[(l << 2) | val3];
+ encodedData[encodedIndex++] = lookUpBase64Alphabet[b3 & 0x3f];
i++;
}
encodedData[encodedIndex++] = 0xa;
}
- for (; i<numberTriplets; i++) {
+ for (; i < numberTriplets; i++) {
b1 = binaryData[dataIndex++];
b2 = binaryData[dataIndex++];
b3 = binaryData[dataIndex++];
-
l = (byte)(b2 & 0x0f);
k = (byte)(b1 & 0x03);
- byte val1 = ((b1 & SIGN)==0)?(byte)(b1>>2):(byte)((b1)>>2^0xc0);
+ 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);
+ 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 ];
- encodedData[encodedIndex++] = lookUpBase64Alphabet[ val2 | ( k<<4 )];
- encodedData[encodedIndex++] = lookUpBase64Alphabet[ (l <<2 ) | val3 ];
- encodedData[encodedIndex++] = lookUpBase64Alphabet[ b3 & 0x3f ];
+ encodedData[encodedIndex++] = lookUpBase64Alphabet[val1];
+ encodedData[encodedIndex++] = lookUpBase64Alphabet[val2 | (k << 4)];
+ encodedData[encodedIndex++] = lookUpBase64Alphabet[(l << 2) | val3];
+ encodedData[encodedIndex++] = lookUpBase64Alphabet[b3 & 0x3f];
}
// form integral number of 6-bit groups
if (fewerThan24bits == EIGHTBIT) {
b1 = binaryData[dataIndex];
- k = (byte) ( b1 &0x03 );
- byte val1 = ((b1 & SIGN)==0)?(byte)(b1>>2):(byte)((b1)>>2^0xc0);
- encodedData[encodedIndex++] = lookUpBase64Alphabet[ val1 ];
- encodedData[encodedIndex++] = lookUpBase64Alphabet[ k<<4 ];
+ k = (byte) (b1 &0x03);
+ byte val1 = ((b1 & SIGN) == 0) ? (byte)(b1 >> 2):(byte)((b1) >> 2 ^ 0xc0);
+ encodedData[encodedIndex++] = lookUpBase64Alphabet[val1];
+ encodedData[encodedIndex++] = lookUpBase64Alphabet[k << 4];
encodedData[encodedIndex++] = PAD;
encodedData[encodedIndex++] = PAD;
} else if (fewerThan24bits == SIXTEENBIT) {
b1 = binaryData[dataIndex];
b2 = binaryData[dataIndex +1 ];
- l = ( byte ) ( b2 &0x0f );
- k = ( byte ) ( b1 &0x03 );
+ l = ( byte ) (b2 & 0x0f);
+ k = ( byte ) (b1 & 0x03);
- 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 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++] = lookUpBase64Alphabet[ val2 | ( k<<4 )];
- encodedData[encodedIndex++] = lookUpBase64Alphabet[ l<<2 ];
+ encodedData[encodedIndex++] = lookUpBase64Alphabet[val1];
+ encodedData[encodedIndex++] = lookUpBase64Alphabet[val2 | (k << 4)];
+ encodedData[encodedIndex++] = lookUpBase64Alphabet[l << 2];
encodedData[encodedIndex++] = PAD;
}
//encodedData[encodedIndex] = 0xa;
return new String(encodedData);
}
/**
- * Decodes Base64 data into octects
+ * Decodes Base64 data into octets
*
* @param encoded String containing base64 encoded data
* @return byte array containing the decoded data
* @throws Base64DecodingException if there is a problem decoding the data
*/
- public final static byte[] decode(String encoded) throws Base64DecodingException {
-
- if (encoded == null)
+ public static final byte[] decode(String encoded) throws Base64DecodingException {
+ if (encoded == null) {
return null;
- byte []bytes=new byte[encoded.length()];
- int len=getBytesInternal(encoded, bytes);
+ }
+ byte[] bytes = new byte[encoded.length()];
+ int len = getBytesInternal(encoded, bytes);
return decodeInternal(bytes, len);
}
- protected static final int getBytesInternal(String s,byte[] result) {
- int length=s.length();
+ protected static final int getBytesInternal(String s, byte[] result) {
+ int length = s.length();
- int newSize=0;
+ int newSize = 0;
for (int i = 0; i < length; i++) {
- byte dataS=(byte)s.charAt(i);
- if (!isWhiteSpace(dataS))
+ byte dataS = (byte)s.charAt(i);
+ if (!isWhiteSpace(dataS)) {
result[newSize++] = dataS;
}
+ }
return newSize;
-
}
- protected final static byte[] decodeInternal(byte[] base64Data, int len) throws Base64DecodingException {
+
+ protected static final byte[] decodeInternal(byte[] base64Data, int len)
+ throws Base64DecodingException {
// remove white spaces
- if (len==-1)
+ if (len == -1) {
len = removeWhiteSpace(base64Data);
+ }
- if (len%FOURBYTE != 0) {
+ if (len % FOURBYTE != 0) {
throw new Base64DecodingException("decoding.divisible.four");
//should be divisible by four
}
- int numberQuadruple = (len/FOURBYTE );
+ int numberQuadruple = (len / FOURBYTE);
- if (numberQuadruple == 0)
+ if (numberQuadruple == 0) {
return new byte[0];
+ }
byte decodedData[] = null;
- byte b1=0,b2=0,b3=0, b4=0;
-
+ byte b1 = 0, b2 = 0, b3 = 0, b4 = 0;
int i = 0;
int encodedIndex = 0;
int dataIndex = 0;
//decodedData = new byte[ (numberQuadruple)*3];
- dataIndex=(numberQuadruple-1)*4;
- encodedIndex=(numberQuadruple-1)*3;
+ dataIndex = (numberQuadruple - 1) * 4;
+ encodedIndex = (numberQuadruple - 1) * 3;
//first last bits.
b1 = base64Alphabet[base64Data[dataIndex++]];
b2 = base64Alphabet[base64Data[dataIndex++]];
if ((b1==-1) || (b2==-1)) {
- throw new Base64DecodingException("decoding.general");//if found "no data" just return null
+ //if found "no data" just return null
+ throw new Base64DecodingException("decoding.general");
}
- byte d3,d4;
- b3 = base64Alphabet[d3=base64Data[dataIndex++]];
- b4 = base64Alphabet[d4=base64Data[dataIndex++]];
- if ((b3==-1 ) || (b4==-1) ) {
+ byte d3, d4;
+ b3 = base64Alphabet[d3 = base64Data[dataIndex++]];
+ b4 = base64Alphabet[d4 = base64Data[dataIndex++]];
+ if ((b3 == -1) || (b4 == -1) ) {
//Check if they are PAD characters
- if (isPad( d3 ) && isPad( d4)) { //Two PAD e.g. 3c[Pad][Pad]
- if ((b2 & 0xf) != 0)//last 4 bits should be zero
+ if (isPad(d3) && isPad(d4)) { //Two PAD e.g. 3c[Pad][Pad]
+ if ((b2 & 0xf) != 0) { //last 4 bits should be zero
+ throw new Base64DecodingException("decoding.general");
+ }
+ decodedData = new byte[encodedIndex + 1];
+ decodedData[encodedIndex] = (byte)(b1 << 2 | b2 >> 4) ;
+ } else if (!isPad(d3) && isPad(d4)) { //One PAD e.g. 3cQ[Pad]
+ if ((b3 & 0x3) != 0) { //last 2 bits should be zero
throw new Base64DecodingException("decoding.general");
- decodedData = new byte[ encodedIndex + 1 ];
- decodedData[encodedIndex] = (byte)( b1 <<2 | b2>>4 ) ;
- } else if (!isPad( d3) && isPad(d4)) { //One PAD e.g. 3cQ[Pad]
- if ((b3 & 0x3 ) != 0)//last 2 bits should be zero
- throw new Base64DecodingException("decoding.general");
- decodedData = new byte[ encodedIndex + 2 ];
- decodedData[encodedIndex++] = (byte)( b1 <<2 | b2>>4 );
- decodedData[encodedIndex] = (byte)(((b2 & 0xf)<<4 ) |( (b3>>2) & 0xf) );
+ }
+ decodedData = new byte[encodedIndex + 2];
+ decodedData[encodedIndex++] = (byte)(b1 << 2 | b2 >> 4);
+ decodedData[encodedIndex] = (byte)(((b2 & 0xf) << 4) |((b3 >> 2) & 0xf));
} else {
- throw new Base64DecodingException("decoding.general");//an error like "3c[Pad]r", "3cdX", "3cXd", "3cXX" where X is non data
+ //an error like "3c[Pad]r", "3cdX", "3cXd", "3cXX" where X is non data
+ throw new Base64DecodingException("decoding.general");
}
} else {
//No PAD e.g 3cQl
decodedData = new byte[encodedIndex+3];
- decodedData[encodedIndex++] = (byte)( b1 <<2 | b2>>4 ) ;
- decodedData[encodedIndex++] = (byte)(((b2 & 0xf)<<4 ) |( (b3>>2) & 0xf) );
- decodedData[encodedIndex++] = (byte)( b3<<6 | b4 );
+ decodedData[encodedIndex++] = (byte)(b1 << 2 | b2 >> 4) ;
+ decodedData[encodedIndex++] = (byte)(((b2 & 0xf) << 4) | ((b3 >> 2) & 0xf));
+ decodedData[encodedIndex++] = (byte)(b3 << 6 | b4);
}
- encodedIndex=0;
- dataIndex=0;
+ encodedIndex = 0;
+ dataIndex = 0;
//the begin
- for (i=numberQuadruple-1; i>0; i--) {
+ for (i = numberQuadruple - 1; i > 0; i--) {
b1 = base64Alphabet[base64Data[dataIndex++]];
b2 = base64Alphabet[base64Data[dataIndex++]];
b3 = base64Alphabet[base64Data[dataIndex++]];
b4 = base64Alphabet[base64Data[dataIndex++]];
- if ( (b1==-1) ||
- (b2==-1) ||
- (b3==-1) ||
- (b4==-1) ) {
- throw new Base64DecodingException("decoding.general");//if found "no data" just return null
+ if ((b1 == -1) ||
+ (b2 == -1) ||
+ (b3 == -1) ||
+ (b4 == -1)) {
+ //if found "no data" just return null
+ throw new Base64DecodingException("decoding.general");
}
- decodedData[encodedIndex++] = (byte)( b1 <<2 | b2>>4 ) ;
- decodedData[encodedIndex++] = (byte)(((b2 & 0xf)<<4 ) |( (b3>>2) & 0xf) );
- decodedData[encodedIndex++] = (byte)( b3<<6 | b4 );
+ decodedData[encodedIndex++] = (byte)(b1 << 2 | b2 >> 4) ;
+ decodedData[encodedIndex++] = (byte)(((b2 & 0xf) << 4) |((b3 >> 2) & 0xf));
+ decodedData[encodedIndex++] = (byte)(b3 << 6 | b4 );
}
return decodedData;
}
+
/**
* Decodes Base64 data into outputstream
*
* @param base64Data String containing Base64 data
* @param os the outputstream
* @throws IOException
* @throws Base64DecodingException
*/
- public final static void decode(String base64Data,
- OutputStream os) throws Base64DecodingException, IOException {
- byte[] bytes=new byte[base64Data.length()];
- int len=getBytesInternal(base64Data, bytes);
+ public static final void decode(String base64Data, OutputStream os)
+ throws Base64DecodingException, IOException {
+ byte[] bytes = new byte[base64Data.length()];
+ int len = getBytesInternal(base64Data, bytes);
decode(bytes,os,len);
}
+
/**
* Decodes Base64 data into outputstream
*
* @param base64Data Byte array containing Base64 data
* @param os the outputstream
* @throws IOException
* @throws Base64DecodingException
*/
- public final static void decode(byte[] base64Data,
- OutputStream os) throws Base64DecodingException, IOException {
+ public static final void decode(byte[] base64Data, OutputStream os)
+ throws Base64DecodingException, IOException {
decode(base64Data,os,-1);
}
- protected final static void decode(byte[] base64Data,
- OutputStream os,int len) throws Base64DecodingException, IOException {
+ protected static final void decode(byte[] base64Data, OutputStream os, int len)
+ throws Base64DecodingException, IOException {
// remove white spaces
- if (len==-1)
+ if (len == -1) {
len = removeWhiteSpace(base64Data);
+ }
- if (len%FOURBYTE != 0) {
+ if (len % FOURBYTE != 0) {
throw new Base64DecodingException("decoding.divisible.four");
//should be divisible by four
}
- int numberQuadruple = (len/FOURBYTE );
+ int numberQuadruple = (len / FOURBYTE);
- if (numberQuadruple == 0)
+ if (numberQuadruple == 0) {
return;
+ }
//byte decodedData[] = null;
- byte b1=0,b2=0,b3=0, b4=0;
+ byte b1 = 0, b2 = 0, b3 = 0, b4 = 0;
int i = 0;
-
int dataIndex = 0;
//the begin
- for (i=numberQuadruple-1; i>0; i--) {
+ for (i=numberQuadruple - 1; i > 0; i--) {
b1 = base64Alphabet[base64Data[dataIndex++]];
b2 = base64Alphabet[base64Data[dataIndex++]];
b3 = base64Alphabet[base64Data[dataIndex++]];
b4 = base64Alphabet[base64Data[dataIndex++]];
- if ( (b1==-1) ||
- (b2==-1) ||
- (b3==-1) ||
- (b4==-1) )
- throw new Base64DecodingException("decoding.general");//if found "no data" just return null
-
-
+ if ((b1 == -1) ||
+ (b2 == -1) ||
+ (b3 == -1) ||
+ (b4 == -1) ) {
+ //if found "no data" just return null
+ throw new Base64DecodingException("decoding.general");
+ }
- os.write((byte)( b1 <<2 | b2>>4 ) );
- os.write((byte)(((b2 & 0xf)<<4 ) |( (b3>>2) & 0xf) ));
- os.write( (byte)( b3<<6 | b4 ));
+ os.write((byte)(b1 << 2 | b2 >> 4));
+ os.write((byte)(((b2 & 0xf) << 4 ) | ((b3 >> 2) & 0xf)));
+ os.write( (byte)(b3 << 6 | b4));
}
b1 = base64Alphabet[base64Data[dataIndex++]];
b2 = base64Alphabet[base64Data[dataIndex++]];
// first last bits.
- if ((b1==-1) ||
- (b2==-1) ){
- throw new Base64DecodingException("decoding.general");//if found "no data" just return null
- }
-
- byte d3,d4;
- b3= base64Alphabet[d3 = base64Data[dataIndex++]];
- b4= base64Alphabet[d4 = base64Data[dataIndex++]];
- if ((b3==-1 ) ||
- (b4==-1) ) {//Check if they are PAD characters
- if (isPad( d3 ) && isPad( d4)) { //Two PAD e.g. 3c[Pad][Pad]
- if ((b2 & 0xf) != 0)//last 4 bits should be zero
- throw new Base64DecodingException("decoding.general");
- os.write( (byte)( b1 <<2 | b2>>4 ) );
- } else if (!isPad( d3) && isPad(d4)) { //One PAD e.g. 3cQ[Pad]
- if ((b3 & 0x3 ) != 0)//last 2 bits should be zero
+ if ((b1 == -1) || (b2 == -1) ) {
+ //if found "no data" just return null
+ throw new Base64DecodingException("decoding.general");
+ }
+
+ byte d3, d4;
+ b3 = base64Alphabet[d3 = base64Data[dataIndex++]];
+ b4 = base64Alphabet[d4 = base64Data[dataIndex++]];
+ if ((b3 == -1 ) || (b4 == -1) ) { //Check if they are PAD characters
+ if (isPad(d3) && isPad(d4)) { //Two PAD e.g. 3c[Pad][Pad]
+ if ((b2 & 0xf) != 0) { //last 4 bits should be zero
throw new Base64DecodingException("decoding.general");
- os.write( (byte)( b1 <<2 | b2>>4 ));
- os.write( (byte)(((b2 & 0xf)<<4 ) |( (b3>>2) & 0xf) ));
+ }
+ os.write((byte)(b1 << 2 | b2 >> 4));
+ } else if (!isPad(d3) && isPad(d4)) { //One PAD e.g. 3cQ[Pad]
+ if ((b3 & 0x3 ) != 0) { //last 2 bits should be zero
+ throw new Base64DecodingException("decoding.general");
+ }
+ os.write((byte)(b1 << 2 | b2 >> 4));
+ os.write((byte)(((b2 & 0xf) << 4) | ((b3 >> 2) & 0xf)));
} else {
- throw new Base64DecodingException("decoding.general");//an error like "3c[Pad]r", "3cdX", "3cXd", "3cXX" where X is non data
+ //an error like "3c[Pad]r", "3cdX", "3cXd", "3cXX" where X is non data
+ throw new Base64DecodingException("decoding.general");
}
} else {
//No PAD e.g 3cQl
- os.write((byte)( b1 <<2 | b2>>4 ) );
- os.write( (byte)(((b2 & 0xf)<<4 ) |( (b3>>2) & 0xf) ));
- os.write((byte)( b3<<6 | b4 ));
+ os.write((byte)(b1 << 2 | b2 >> 4));
+ os.write( (byte)(((b2 & 0xf) << 4) | ((b3 >> 2) & 0xf)));
+ os.write((byte)(b3 << 6 | b4));
}
- return ;
}
/**
* Decodes Base64 data into outputstream
*
* @param is containing Base64 data
* @param os the outputstream
* @throws IOException
* @throws Base64DecodingException
*/
- public final static void decode(InputStream is,
- OutputStream os) throws Base64DecodingException, IOException {
+ public static final void decode(InputStream is, OutputStream os)
+ throws Base64DecodingException, IOException {
//byte decodedData[] = null;
- byte b1=0,b2=0,b3=0, b4=0;
+ byte b1 = 0, b2 = 0, b3 = 0, b4 = 0;
int index=0;
- byte []data=new byte[4];
+ byte[] data = new byte[4];
int read;
//the begin
- while ((read=is.read())>0) {
- byte readed=(byte)read;
+ while ((read = is.read()) > 0) {
+ byte readed = (byte)read;
if (isWhiteSpace(readed)) {
continue;
}
if (isPad(readed)) {
- data[index++]=readed;
- if (index==3)
- data[index++]=(byte)is.read();
+ data[index++] = readed;
+ if (index == 3) {
+ data[index++] = (byte)is.read();
+ }
break;
}
-
- if ((data[index++]=readed)==-1) {
- throw new Base64DecodingException("decoding.general");//if found "no data" just return null
+ if ((data[index++] = readed) == -1) {
+ //if found "no data" just return null
+ throw new Base64DecodingException("decoding.general");
}
- if (index!=4) {
+ if (index != 4) {
continue;
}
- index=0;
+ index = 0;
b1 = base64Alphabet[data[0]];
b2 = base64Alphabet[data[1]];
b3 = base64Alphabet[data[2]];
b4 = base64Alphabet[data[3]];
- os.write((byte)( b1 <<2 | b2>>4 ) );
- os.write((byte)(((b2 & 0xf)<<4 ) |( (b3>>2) & 0xf) ));
- os.write( (byte)( b3<<6 | b4 ));
+ os.write((byte)(b1 << 2 | b2 >> 4));
+ os.write((byte)(((b2 & 0xf) << 4) | ((b3 >> 2) & 0xf)));
+ os.write((byte)(b3 << 6 | b4));
}
-
- byte d1=data[0],d2=data[1],d3=data[2], d4=data[3];
+ byte d1 = data[0], d2 = data[1], d3 = data[2], d4 = data[3];
b1 = base64Alphabet[d1];
b2 = base64Alphabet[d2];
- b3 = base64Alphabet[ d3 ];
- b4 = base64Alphabet[ d4 ];
- if ((b3==-1 ) ||
- (b4==-1) ) {//Check if they are PAD characters
- if (isPad( d3 ) && isPad( d4)) { //Two PAD e.g. 3c[Pad][Pad]
- if ((b2 & 0xf) != 0)//last 4 bits should be zero
- throw new Base64DecodingException("decoding.general");
- os.write( (byte)( b1 <<2 | b2>>4 ) );
- } else if (!isPad( d3) && isPad(d4)) { //One PAD e.g. 3cQ[Pad]
- b3 = base64Alphabet[ d3 ];
- if ((b3 & 0x3 ) != 0)//last 2 bits should be zero
+ b3 = base64Alphabet[d3];
+ b4 = base64Alphabet[d4];
+ if ((b3 == -1) || (b4 == -1)) { //Check if they are PAD characters
+ if (isPad(d3) && isPad(d4)) { //Two PAD e.g. 3c[Pad][Pad]
+ if ((b2 & 0xf) != 0) { //last 4 bits should be zero
+ throw new Base64DecodingException("decoding.general");
+ }
+ os.write((byte)(b1 << 2 | b2 >> 4));
+ } else if (!isPad(d3) && isPad(d4)) { //One PAD e.g. 3cQ[Pad]
+ b3 = base64Alphabet[d3];
+ if ((b3 & 0x3) != 0) { //last 2 bits should be zero
throw new Base64DecodingException("decoding.general");
- os.write( (byte)( b1 <<2 | b2>>4 ));
- os.write( (byte)(((b2 & 0xf)<<4 ) |( (b3>>2) & 0xf) ));
+ }
+ os.write((byte)(b1 << 2 | b2 >> 4));
+ os.write((byte)(((b2 & 0xf) << 4) | ((b3 >> 2) & 0xf)));
} else {
- throw new Base64DecodingException("decoding.general");//an error like "3c[Pad]r", "3cdX", "3cXd", "3cXX" where X is non data
+ //an error like "3c[Pad]r", "3cdX", "3cXd", "3cXX" where X is non data
+ throw new Base64DecodingException("decoding.general");
}
} else {
//No PAD e.g 3cQl
-
- os.write((byte)( b1 <<2 | b2>>4 ) );
- os.write( (byte)(((b2 & 0xf)<<4 ) |( (b3>>2) & 0xf) ));
- os.write((byte)( b3<<6 | b4 ));
+ os.write((byte)(b1 << 2 | b2 >> 4));
+ os.write((byte)(((b2 & 0xf) << 4) | ((b3 >> 2) & 0xf)));
+ os.write((byte)(b3 << 6 | b4));
}
-
- return ;
}
+
/**
* remove WhiteSpace from MIME containing encoded Base64 data.
*
* @param data the byte array of base64 data (with WS)
* @return the new length
*/
protected static final int removeWhiteSpace(byte[] data) {
- if (data == null)
+ if (data == null) {
return 0;
+ }
// count characters that's not whitespace
int newSize = 0;
int len = data.length;
for (int i = 0; i < len; i++) {
- byte dataS=data[i];
- if (!isWhiteSpace(dataS))
+ byte dataS = data[i];
+ if (!isWhiteSpace(dataS)) {
data[newSize++] = dataS;
}
+ }
return newSize;
}
}