--- old/src/share/classes/com/sun/org/apache/xml/internal/security/utils/Base64.java 2013-06-28 11:34:21.152947508 -0400
+++ new/src/share/classes/com/sun/org/apache/xml/internal/security/utils/Base64.java 2013-06-28 11:34:20.976952986 -0400
@@ -2,21 +2,23 @@
* 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
- *
- * http://www.apache.org/licenses/LICENSE-2.0
+/**
+ * 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
*
- * 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.
+ * 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.
*/
package com.sun.org.apache.xml.internal.security.utils;
@@ -32,762 +34,765 @@
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)
+ * Optimized code. (raw version taken from oreilly.jonathan.util,
+ * 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 RFC 2045
+ * @see RFC 2045
* @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);
+ }
- /** Field BASE64DEFAULTLENGTH */
- public static final int BASE64DEFAULTLENGTH = 76;
+ 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 {@link BigInteger}.
- * No sign-bit is outputed.
- *
- * N.B.: {@link BigInteger}'s toByteArray
- * retunrs eventually longer arrays because of the leading sign-bit.
- *
- * @param big BigInteger to be converted
- * @param bitlen int the desired length in bits of the representation
- * @return a byte array with bitlen
bits of big
- */
- static final byte[] getBytes(BigInteger big, int bitlen) {
-
- //round bitlen
- bitlen = ((bitlen + 7) >> 3) << 3;
-
- if (bitlen < big.bitLength()) {
- throw new IllegalArgumentException(I18n
- .translate("utils.Base64.IllegalBitlength"));
- }
-
- byte[] bigBytes = big.toByteArray();
-
- if (((big.bitLength() % 8) != 0)
- && (((big.bitLength() / 8) + 1) == (bitlen / 8))) {
- return bigBytes;
- }
-
- // some copying needed
- int startSrc = 0; // no need to skip anything
- int bigLen = bigBytes.length; //valid length of the string
+ private Base64() {
+ // we don't allow instantiation
+ }
+
+ /**
+ * Returns a byte-array representation of a {@link BigInteger}.
+ * No sign-bit is output.
+ *
+ * N.B.: {@link BigInteger}'s toByteArray
+ * returns eventually longer arrays because of the leading sign-bit.
+ *
+ * @param big BigInteger to be converted
+ * @param bitlen int the desired length in bits of the representation
+ * @return a byte array with bitlen
bits of big
+ */
+ static final byte[] getBytes(BigInteger big, int bitlen) {
- if ((big.bitLength() % 8) == 0) { // correct values
+ //round bitlen
+ bitlen = ((bitlen + 7) >> 3) << 3;
+
+ if (bitlen < big.bitLength()) {
+ throw new IllegalArgumentException(I18n.translate("utils.Base64.IllegalBitlength"));
+ }
+
+ byte[] bigBytes = big.toByteArray();
+
+ if (((big.bitLength() % 8) != 0)
+ && (((big.bitLength() / 8) + 1) == (bitlen / 8))) {
+ return bigBytes;
+ }
+
+ // some copying needed
+ int startSrc = 0; // no need to skip anything
+ int bigLen = bigBytes.length; //valid length of the string
+
+ if ((big.bitLength() % 8) == 0) { // correct values
startSrc = 1; // skip sign bit
bigLen--; // valid length of the string
- }
+ }
- int startDst = bitlen / 8 - bigLen; //pad with leading nulls
- byte[] resizedBytes = new byte[bitlen / 8];
+ int startDst = bitlen / 8 - bigLen; //pad with leading nulls
+ byte[] resizedBytes = new byte[bitlen / 8];
- System.arraycopy(bigBytes, startSrc, resizedBytes, startDst, bigLen);
+ System.arraycopy(bigBytes, startSrc, resizedBytes, startDst, bigLen);
- return resizedBytes;
+ return resizedBytes;
+ }
- }
-
- /**
- * Encode in Base64 the given {@link BigInteger}.
- *
- * @param big
- * @return String with Base64 encoding
- */
- public static final String encode(BigInteger big) {
- return encode(getBytes(big, big.bitLength()));
- }
-
- /**
- * Returns a byte-array representation of a {@link BigInteger}.
- * No sign-bit is outputed.
- *
- * N.B.: {@link BigInteger}'s toByteArray
- * retunrs eventually longer arrays because of the leading sign-bit.
- *
- * @param big BigInteger to be converted
- * @param bitlen int the desired length in bits of the representation
- * @return a byte array with bitlen
bits of big
- */
- public static final byte[] encode(BigInteger big, int bitlen) {
-
- //round bitlen
- bitlen = ((bitlen + 7) >> 3) << 3;
-
- if (bitlen < big.bitLength()) {
- throw new IllegalArgumentException(I18n
- .translate("utils.Base64.IllegalBitlength"));
- }
-
- byte[] bigBytes = big.toByteArray();
-
- if (((big.bitLength() % 8) != 0)
- && (((big.bitLength() / 8) + 1) == (bitlen / 8))) {
- return bigBytes;
- }
-
- // some copying needed
- int startSrc = 0; // no need to skip anything
- int bigLen = bigBytes.length; //valid length of the string
+ /**
+ * Encode in Base64 the given {@link BigInteger}.
+ *
+ * @param big
+ * @return String with Base64 encoding
+ */
+ public static final String encode(BigInteger big) {
+ return encode(getBytes(big, big.bitLength()));
+ }
+
+ /**
+ * Returns a byte-array representation of a {@link BigInteger}.
+ * No sign-bit is output.
+ *
+ * N.B.: {@link BigInteger}'s toByteArray
+ * returns eventually longer arrays because of the leading sign-bit.
+ *
+ * @param big BigInteger to be converted
+ * @param bitlen int the desired length in bits of the representation
+ * @return a byte array with bitlen
bits of big
+ */
+ public static final byte[] encode(BigInteger big, int bitlen) {
+
+ //round bitlen
+ bitlen = ((bitlen + 7) >> 3) << 3;
+
+ if (bitlen < big.bitLength()) {
+ throw new IllegalArgumentException(I18n.translate("utils.Base64.IllegalBitlength"));
+ }
- if ((big.bitLength() % 8) == 0) { // correct values
+ byte[] bigBytes = big.toByteArray();
+
+ if (((big.bitLength() % 8) != 0)
+ && (((big.bitLength() / 8) + 1) == (bitlen / 8))) {
+ return bigBytes;
+ }
+
+ // some copying needed
+ int startSrc = 0; // no need to skip anything
+ int bigLen = bigBytes.length; //valid length of the string
+
+ if ((big.bitLength() % 8) == 0) { // correct values
startSrc = 1; // skip sign bit
bigLen--; // valid length of the string
- }
+ }
- int startDst = bitlen / 8 - bigLen; //pad with leading nulls
- byte[] resizedBytes = new byte[bitlen / 8];
+ int startDst = bitlen / 8 - bigLen; //pad with leading nulls
+ byte[] resizedBytes = new byte[bitlen / 8];
- System.arraycopy(bigBytes, startSrc, resizedBytes, startDst, bigLen);
+ System.arraycopy(bigBytes, startSrc, resizedBytes, startDst, bigLen);
- return resizedBytes;
+ return resizedBytes;
+ }
- }
-
- /**
- * Method decodeBigIntegerFromElement
- *
- * @param element
- * @return the biginter obtained from the node
- * @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
- {
- 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) {
-
- String encodedInt = encode(biginteger);
-
- if (encodedInt.length() > 76) {
- encodedInt = "\n" + encodedInt + "\n";
- }
-
- Document doc = element.getOwnerDocument();
- Text text = doc.createTextNode(encodedInt);
-
- element.appendChild(text);
- }
-
- /**
- * Method decode
- *
- * Takes the Text
children of the Element and interprets
- * them as input for the Base64.decode()
function.
- *
- * @param element
- * @return the byte obtained of the decoding the element
- * $todo$ not tested yet
- * @throws Base64DecodingException
- */
- public static final byte[] decode(Element element) throws Base64DecodingException {
-
- Node sibling = element.getFirstChild();
- StringBuffer sb = new StringBuffer();
-
- while (sibling!=null) {
- if (sibling.getNodeType() == Node.TEXT_NODE) {
- Text t = (Text) sibling;
-
- sb.append(t.getData());
- }
- sibling=sibling.getNextSibling();
- }
-
- return decode(sb.toString());
- }
-
- /**
- * Method encodeToElement
- *
- * @param doc
- * @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) {
-
- Element el = XMLUtils.createElementInSignatureSpace(doc, localName);
- Text text = doc.createTextNode(encode(bytes));
-
- el.appendChild(text);
-
- return el;
- }
-
- /**
- * Method decode
- *
- *
- * @param base64
- * @return the UTF bytes of the base64
- * @throws Base64DecodingException
- *
- */
- public final static 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 byte[] to be base64 encoded
- * @return the String with encoded data
- */
- public static final String encode(byte[] binaryData) {
- return XMLUtils.ignoreLineBreaks()
- ? encode(binaryData, Integer.MAX_VALUE)
- : encode(binaryData, BASE64DEFAULTLENGTH);
- }
-
- /**
- * 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)
- throws IOException, Base64DecodingException {
-
- UnsyncByteArrayOutputStream 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= '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] = '/';
-
- }
-
- 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
- *
- * @param binaryData Array containing binaryData
- * @return Encoded Base64 array
- */
- /**
- * Encode a byte array in Base64 format and return an optionally
- * wrapped line.
- *
- * @param binaryData byte[]
data to be encoded
- * @param length int length of wrapped lines; No wrapping if less than 4.
- * @return a String
with encoded data
- */
- public static final String encode(byte[] binaryData,int length) {
+ /**
+ * Method decodeBigIntegerFromElement
+ *
+ * @param element
+ * @return the biginteger obtained from the node
+ * @throws Base64DecodingException
+ */
+ public static final BigInteger decodeBigIntegerFromElement(Element element)
+ throws Base64DecodingException {
+ return new BigInteger(1, Base64.decode(element));
+ }
- if (length<4) {
- length=Integer.MAX_VALUE;
- }
+ /**
+ * Method decodeBigIntegerFromText
+ *
+ * @param text
+ * @return the biginter obtained from the text node
+ * @throws Base64DecodingException
+ */
+ public static final BigInteger decodeBigIntegerFromText(Text text)
+ throws Base64DecodingException {
+ return new BigInteger(1, Base64.decode(text.getData()));
+ }
- if (binaryData == null)
- return null;
+ /**
+ * 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) {
- int lengthDataBits = binaryData.length*EIGHTBIT;
- if (lengthDataBits == 0) {
- return "";
- }
+ String encodedInt = encode(biginteger);
- 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;
+ if (!XMLUtils.ignoreLineBreaks() && encodedInt.length() > BASE64DEFAULTLENGTH) {
+ encodedInt = "\n" + encodedInt + "\n";
+ }
- encodedData = new char[numberQuartet*4+numberLines];
+ Document doc = element.getOwnerDocument();
+ Text text = doc.createTextNode(encodedInt);
- byte k=0, l=0, b1=0,b2=0,b3=0;
+ element.appendChild(text);
+ }
- int encodedIndex = 0;
- int dataIndex = 0;
- int i = 0;
+ /**
+ * Method decode
+ *
+ * Takes the Text
children of the Element and interprets
+ * them as input for the Base64.decode()
function.
+ *
+ * @param element
+ * @return the byte obtained of the decoding the element
+ * $todo$ not tested yet
+ * @throws Base64DecodingException
+ */
+ public static final byte[] decode(Element element) throws Base64DecodingException {
+ Node sibling = element.getFirstChild();
+ StringBuffer sb = new StringBuffer();
- for (int line = 0; line < numberLines; line++) {
- for (int quartet = 0; quartet < 19; quartet++) {
- b1 = binaryData[dataIndex++];
- b2 = binaryData[dataIndex++];
- b3 = binaryData[dataIndex++];
+ while (sibling != null) {
+ if (sibling.getNodeType() == Node.TEXT_NODE) {
+ Text t = (Text) sibling;
+ sb.append(t.getData());
+ }
+ sibling = sibling.getNextSibling();
+ }
- l = (byte)(b2 & 0x0f);
- k = (byte)(b1 & 0x03);
+ return decode(sb.toString());
+ }
- byte val1 = ((b1 & SIGN)==0)?(byte)(b1>>2):(byte)((b1)>>2^0xc0);
+ /**
+ * Method encodeToElement
+ *
+ * @param doc
+ * @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) {
+ Element el = XMLUtils.createElementInSignatureSpace(doc, localName);
+ Text text = doc.createTextNode(encode(bytes));
- byte val2 = ((b2 & SIGN)==0)?(byte)(b2>>4):(byte)((b2)>>4^0xf0);
- byte val3 = ((b3 & SIGN)==0)?(byte)(b3>>6):(byte)((b3)>>6^0xfc);
+ el.appendChild(text);
+ return el;
+ }
- encodedData[encodedIndex++] = lookUpBase64Alphabet[ val1 ];
- encodedData[encodedIndex++] = lookUpBase64Alphabet[ val2 | ( k<<4 )];
- encodedData[encodedIndex++] = lookUpBase64Alphabet[ (l <<2 ) | val3 ];
- encodedData[encodedIndex++] = lookUpBase64Alphabet[ b3 & 0x3f ];
+ /**
+ * Method decode
+ *
+ * @param base64
+ * @return the UTF bytes of the base64
+ * @throws Base64DecodingException
+ *
+ */
+ public static final byte[] decode(byte[] base64) throws Base64DecodingException {
+ return decodeInternal(base64, -1);
+ }
- i++;
- }
- encodedData[encodedIndex++] = 0xa;
- }
+ /**
+ * Encode a byte array and fold lines at the standard 76th character unless
+ * ignore line breaks property is set.
+ *
+ * @param binaryData byte[] to be base64 encoded
+ * @return the String with encoded data
+ */
+ public static final String encode(byte[] binaryData) {
+ return XMLUtils.ignoreLineBreaks()
+ ? encode(binaryData, Integer.MAX_VALUE)
+ : encode(binaryData, BASE64DEFAULTLENGTH);
+ }
- for (; i>2):(byte)((b1)>>2^0xc0);
+ protected static final boolean isWhiteSpace(byte octect) {
+ return (octect == 0x20 || octect == 0xd || octect == 0xa || octect == 0x9);
+ }
- byte val2 = ((b2 & SIGN)==0)?(byte)(b2>>4):(byte)((b2)>>4^0xf0);
- byte val3 = ((b3 & SIGN)==0)?(byte)(b3>>6):(byte)((b3)>>6^0xfc);
+ protected static final boolean isPad(byte octect) {
+ return (octect == PAD);
+ }
+ /**
+ * Encodes hex octets into Base64
+ *
+ * @param binaryData Array containing binaryData
+ * @return Encoded Base64 array
+ */
+ /**
+ * Encode a byte array in Base64 format and return an optionally
+ * wrapped line.
+ *
+ * @param binaryData byte[]
data to be encoded
+ * @param length int length of wrapped lines; No wrapping if less than 4.
+ * @return a String
with encoded data
+ */
+ public static final String encode(byte[] binaryData,int length) {
+ if (length < 4) {
+ length = Integer.MAX_VALUE;
+ }
- encodedData[encodedIndex++] = lookUpBase64Alphabet[ val1 ];
- encodedData[encodedIndex++] = lookUpBase64Alphabet[ val2 | ( k<<4 )];
- encodedData[encodedIndex++] = lookUpBase64Alphabet[ (l <<2 ) | val3 ];
- encodedData[encodedIndex++] = lookUpBase64Alphabet[ b3 & 0x3f ];
- }
+ if (binaryData == null) {
+ return null;
+ }
- // 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 ];
- 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 );
+ int lengthDataBits = binaryData.length * EIGHTBIT;
+ if (lengthDataBits == 0) {
+ return "";
+ }
- byte val1 = ((b1 & SIGN)==0)?(byte)(b1>>2):(byte)((b1)>>2^0xc0);
- byte val2 = ((b2 & SIGN)==0)?(byte)(b2>>4):(byte)((b2)>>4^0xf0);
+ 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;
+ 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 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];
+
+ i++;
+ }
+ encodedData[encodedIndex++] = 0xa;
+ }
+
+ 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 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 ];
- encodedData[encodedIndex++] = PAD;
- }
+ // 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];
+ 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);
+
+ 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++] = PAD;
+ }
- //encodedData[encodedIndex] = 0xa;
+ //encodedData[encodedIndex] = 0xa;
- return new String(encodedData);
- }
+ 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)
- return null;
- byte []bytes=new byte[encoded.length()];
- int len=getBytesInternal(encoded, bytes);
- return decodeInternal(bytes, len);
+ 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);
+ 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 {
- // remove white spaces
- if (len==-1)
- len = removeWhiteSpace(base64Data);
-
- if (len%FOURBYTE != 0) {
- throw new Base64DecodingException("decoding.divisible.four");
- //should be divisible by four
- }
-
- int numberQuadruple = (len/FOURBYTE );
-
- if (numberQuadruple == 0)
- return new byte[0];
-
- byte decodedData[] = null;
- 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;
- //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
+
+ protected static final byte[] decodeInternal(byte[] base64Data, int len)
+ throws Base64DecodingException {
+ // remove white spaces
+ if (len == -1) {
+ len = removeWhiteSpace(base64Data);
}
+ if (len % FOURBYTE != 0) {
+ throw new Base64DecodingException("decoding.divisible.four");
+ //should be divisible by four
+ }
- 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");
- 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) );
+ int numberQuadruple = (len / FOURBYTE);
+
+ if (numberQuadruple == 0) {
+ return new byte[0];
+ }
+
+ byte decodedData[] = null;
+ 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;
+ //first last bits.
+ b1 = base64Alphabet[base64Data[dataIndex++]];
+ b2 = base64Alphabet[base64Data[dataIndex++]];
+ 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");
+ }
+ 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));
} 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 );
- }
- encodedIndex=0;
- dataIndex=0;
- //the begin
- 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
- }
-
- 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);
- 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 {
- decode(base64Data,os,-1);
- }
- protected final static void decode(byte[] base64Data,
- OutputStream os,int len) throws Base64DecodingException, IOException {
+ 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;
+ //the begin
+ 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)) {
+ //if found "no data" just return null
+ throw new Base64DecodingException("decoding.general");
+ }
- // remove white spaces
- if (len==-1)
- len = removeWhiteSpace(base64Data);
+ decodedData[encodedIndex++] = (byte)(b1 << 2 | b2 >> 4) ;
+ decodedData[encodedIndex++] = (byte)(((b2 & 0xf) << 4) |((b3 >> 2) & 0xf));
+ decodedData[encodedIndex++] = (byte)(b3 << 6 | b4 );
+ }
+ return decodedData;
+ }
- if (len%FOURBYTE != 0) {
- throw new Base64DecodingException("decoding.divisible.four");
- //should be divisible by four
+ /**
+ * Decodes Base64 data into outputstream
+ *
+ * @param base64Data String containing Base64 data
+ * @param os the outputstream
+ * @throws IOException
+ * @throws Base64DecodingException
+ */
+ 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);
}
- int numberQuadruple = (len/FOURBYTE );
+ /**
+ * Decodes Base64 data into outputstream
+ *
+ * @param base64Data Byte array containing Base64 data
+ * @param os the outputstream
+ * @throws IOException
+ * @throws Base64DecodingException
+ */
+ public static final void decode(byte[] base64Data, OutputStream os)
+ throws Base64DecodingException, IOException {
+ decode(base64Data,os,-1);
+ }
- if (numberQuadruple == 0)
- return;
+ protected static final void decode(byte[] base64Data, OutputStream os, int len)
+ throws Base64DecodingException, IOException {
+ // remove white spaces
+ if (len == -1) {
+ len = removeWhiteSpace(base64Data);
+ }
+
+ if (len % FOURBYTE != 0) {
+ throw new Base64DecodingException("decoding.divisible.four");
+ //should be divisible by four
+ }
+
+ int numberQuadruple = (len / FOURBYTE);
+
+ if (numberQuadruple == 0) {
+ return;
+ }
- //byte decodedData[] = null;
- byte b1=0,b2=0,b3=0, b4=0;
+ //byte decodedData[] = null;
+ byte b1 = 0, b2 = 0, b3 = 0, b4 = 0;
- int i = 0;
+ int i = 0;
+ int dataIndex = 0;
- int dataIndex = 0;
+ //the begin
+ 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) ) {
+ //if found "no data" just return null
+ throw new Base64DecodingException("decoding.general");
+ }
- //the begin
- for (i=numberQuadruple-1; i>0; i--) {
+ 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++]];
- 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
-
-
-
- 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
- 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
- }
- } 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 ));
- }
- 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 {
- //byte decodedData[] = null;
- byte b1=0,b2=0,b3=0, b4=0;
-
- int index=0;
- byte []data=new byte[4];
- int read;
- //the begin
- while ((read=is.read())>0) {
- byte readed=(byte)read;
- if (isWhiteSpace(readed)) {
- continue;
+
+ // first last bits.
+ if ((b1 == -1) || (b2 == -1) ) {
+ //if found "no data" just return null
+ throw new Base64DecodingException("decoding.general");
}
- if (isPad(readed)) {
- data[index++]=readed;
- if (index==3)
- data[index++]=(byte)is.read();
- break;
+
+ 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
+ throw new Base64DecodingException("decoding.general");
+ }
+ os.write((byte)(b1 << 2 | b2 >> 4));
+ os.write((byte)(((b2 & 0xf) << 4) | ((b3 >> 2) & 0xf)));
+ } else {
+ //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));
}
+ }
+ /**
+ * Decodes Base64 data into outputstream
+ *
+ * @param is containing Base64 data
+ * @param os the outputstream
+ * @throws IOException
+ * @throws Base64DecodingException
+ */
+ public static final void decode(InputStream is, OutputStream os)
+ throws Base64DecodingException, IOException {
+ //byte decodedData[] = null;
+ byte b1 = 0, b2 = 0, b3 = 0, b4 = 0;
+
+ int index=0;
+ byte[] data = new byte[4];
+ int read;
+ //the begin
+ 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();
+ }
+ 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;
+ 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));
+ }
+
+ 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
+ throw new Base64DecodingException("decoding.general");
+ }
+ os.write((byte)(b1 << 2 | b2 >> 4));
+ os.write((byte)(((b2 & 0xf) << 4) | ((b3 >> 2) & 0xf)));
+ } else {
+ //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));
}
- 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 ));
}
+ /**
+ * 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) {
+ return 0;
+ }
- 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
- 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
- }
- } 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 ));
- }
-
- 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)
- 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))
- data[newSize++] = dataS;
- }
- return newSize;
- }
+ // 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)) {
+ data[newSize++] = dataS;
+ }
+ }
+ return newSize;
+ }
}