| /* |
| * 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 |
| * |
| * 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 org.apache.axis.utils; |
| |
| /** |
| * Unceremoniously lifted from |
| * jakarta-commons/httpclient/src/java/org/apache/commons/httpclient/Base64.java |
| * Revision 1.8 2002/01/05 11:15:59 |
| * |
| * Eliminates dependency on sun.misc.Base64Encoding, |
| * which isn't appreciated by the J2EE security manager. |
| * (it's an access exception to load sun.misc.* classes |
| * in application code). |
| * |
| * <p>Base64 encoder and decoder.</p> |
| * <p> |
| * This class provides encoding/decoding methods for |
| * the Base64 encoding as 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 |
| * </p> |
| * @author Jeffrey Rodriguez |
| */ |
| final class Base64 { |
| 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 SIXBIT = 6; |
| private static final int FOURBYTE = 4; |
| private static final int SIGN = -128; |
| private static final byte PAD = ( byte ) '='; |
| private static byte [] base64Alphabet = new byte[BASELENGTH]; |
| private static byte [] lookUpBase64Alphabet = new byte[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] = (byte) ('A'+i ); |
| } |
| |
| for (int i = 26, j = 0; i<=51; i++, j++ ) { |
| lookUpBase64Alphabet[i] = (byte) ('a'+ j ); |
| } |
| |
| for (int i = 52, j = 0; i<=61; i++, j++ ) { |
| lookUpBase64Alphabet[i] = (byte) ('0' + j ); |
| } |
| lookUpBase64Alphabet[62] = (byte) '+'; |
| lookUpBase64Alphabet[63] = (byte) '/'; |
| |
| } |
| |
| static boolean isBase64( String isValidString ){ |
| return( isArrayByteBase64( isValidString.getBytes())); |
| } |
| |
| |
| static boolean isBase64( byte octect ) { |
| // Should we ignore white space? |
| return(octect == PAD || base64Alphabet[octect] != -1 ); |
| } |
| |
| |
| static boolean isArrayByteBase64( byte[] arrayOctect ) { |
| int length = arrayOctect.length; |
| if ( length == 0 ) { |
| return true; |
| } |
| for ( int i=0; i < length; i++ ) { |
| if ( Base64.isBase64( arrayOctect[i] ) == false) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| /** |
| * Encodes hex octects into Base64 |
| * |
| * @param binaryData Array containing binaryData |
| * @return Base64-encoded array |
| */ |
| static byte[] encode( byte[] binaryData ) { |
| |
| int lengthDataBits = binaryData.length*EIGHTBIT; |
| int fewerThan24bits = lengthDataBits%TWENTYFOURBITGROUP; |
| int numberTriplets = lengthDataBits/TWENTYFOURBITGROUP; |
| byte encodedData[] = null; |
| |
| |
| if ( fewerThan24bits != 0 ) { |
| //data not divisible by 24 bit |
| encodedData = new byte[ (numberTriplets + 1 )*4 ]; |
| } |
| else { |
| // 16 or 8 bit |
| encodedData = new byte[ numberTriplets*4 ]; |
| } |
| |
| byte k=0, l=0, b1=0,b2=0,b3=0; |
| |
| int encodedIndex = 0; |
| int dataIndex = 0; |
| int i = 0; |
| for ( i = 0; i<numberTriplets; i++ ) { |
| |
| dataIndex = i*3; |
| b1 = binaryData[dataIndex]; |
| b2 = binaryData[dataIndex + 1]; |
| b3 = binaryData[dataIndex + 2]; |
| |
| l = (byte)(b2 & 0x0f); |
| k = (byte)(b1 & 0x03); |
| |
| encodedIndex = i*4; |
| 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+1] = lookUpBase64Alphabet[ val2 | ( k<<4 )]; |
| encodedData[encodedIndex+2] = lookUpBase64Alphabet[ (l <<2 ) | val3 ]; |
| encodedData[encodedIndex+3] = lookUpBase64Alphabet[ b3 & 0x3f ]; |
| } |
| |
| // form integral number of 6-bit groups |
| dataIndex = i*3; |
| encodedIndex = i*4; |
| 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 + 1] = lookUpBase64Alphabet[ k<<4 ]; |
| encodedData[encodedIndex + 2] = PAD; |
| encodedData[encodedIndex + 3] = 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 + 1] = lookUpBase64Alphabet[ val2 | ( k<<4 )]; |
| encodedData[encodedIndex + 2] = lookUpBase64Alphabet[ l<<2 ]; |
| encodedData[encodedIndex + 3] = PAD; |
| } |
| return encodedData; |
| } |
| |
| |
| /** |
| * Decodes Base64 data into octects |
| * |
| * @param base64Data Byte array containing Base64 data |
| * @return Array containing decoded data. |
| */ |
| static byte[] decode( byte[] base64Data ) { |
| // Should we throw away anything not in base64Data ? |
| |
| // handle the edge case, so we don't have to worry about it later |
| if(base64Data.length == 0) { return new byte[0]; } |
| |
| int numberQuadruple = base64Data.length/FOURBYTE; |
| byte decodedData[] = null; |
| byte b1=0,b2=0,b3=0, b4=0, marker0=0, marker1=0; |
| |
| int encodedIndex = 0; |
| int dataIndex = 0; |
| { |
| // this block sizes the output array properly - rlw |
| int lastData = base64Data.length; |
| // ignore the '=' padding |
| while(base64Data[lastData-1] == PAD) { |
| if(--lastData == 0) { return new byte[0]; } |
| } |
| decodedData = new byte[ lastData - numberQuadruple ]; |
| } |
| |
| for (int i = 0; i<numberQuadruple; i++ ) { |
| dataIndex = i*4; |
| marker0 = base64Data[dataIndex +2]; |
| marker1 = base64Data[dataIndex +3]; |
| |
| b1 = base64Alphabet[base64Data[dataIndex]]; |
| b2 = base64Alphabet[base64Data[dataIndex +1]]; |
| |
| if ( marker0 != PAD && marker1 != PAD ) { //No PAD e.g 3cQl |
| b3 = base64Alphabet[ marker0 ]; |
| 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 ); |
| } else if ( marker0 == PAD ) { //Two PAD e.g. 3c[Pad][Pad] |
| decodedData[encodedIndex] = (byte)( b1 <<2 | b2>>4 ) ; |
| } 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) ); |
| } |
| encodedIndex += 3; |
| } |
| return decodedData; |
| } |
| |
| } |