1/* 2 * Copyright (c) 2004, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 * 25 * THIS FILE WAS MODIFIED BY SUN MICROSYSTEMS, INC. 26 */ 27 28package com.sun.xml.internal.fastinfoset.algorithm; 29 30import java.io.IOException; 31import java.io.InputStream; 32import java.io.OutputStream; 33import com.sun.xml.internal.org.jvnet.fastinfoset.EncodingAlgorithmException; 34import com.sun.xml.internal.fastinfoset.CommonResourceBundle; 35 36public class BASE64EncodingAlgorithm extends BuiltInEncodingAlgorithm { 37 38 /* package */ static final char encodeBase64[] = { 39 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 40 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 41 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 42 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 43 '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/' 44 }; 45 46 /* package */ static final int decodeBase64[] = { 47 /*'+'*/ 62, 48 -1, -1, -1, 49 /*'/'*/ 63, 50 /*'0'*/ 52, 51 /*'1'*/ 53, 52 /*'2'*/ 54, 53 /*'3'*/ 55, 54 /*'4'*/ 56, 55 /*'5'*/ 57, 56 /*'6'*/ 58, 57 /*'7'*/ 59, 58 /*'8'*/ 60, 59 /*'9'*/ 61, 60 -1, -1, -1, -1, -1, -1, -1, 61 /*'A'*/ 0, 62 /*'B'*/ 1, 63 /*'C'*/ 2, 64 /*'D'*/ 3, 65 /*'E'*/ 4, 66 /*'F'*/ 5, 67 /*'G'*/ 6, 68 /*'H'*/ 7, 69 /*'I'*/ 8, 70 /*'J'*/ 9, 71 /*'K'*/ 10, 72 /*'L'*/ 11, 73 /*'M'*/ 12, 74 /*'N'*/ 13, 75 /*'O'*/ 14, 76 /*'P'*/ 15, 77 /*'Q'*/ 16, 78 /*'R'*/ 17, 79 /*'S'*/ 18, 80 /*'T'*/ 19, 81 /*'U'*/ 20, 82 /*'V'*/ 21, 83 /*'W'*/ 22, 84 /*'X'*/ 23, 85 /*'Y'*/ 24, 86 /*'Z'*/ 25, 87 -1, -1, -1, -1, -1, -1, 88 /*'a'*/ 26, 89 /*'b'*/ 27, 90 /*'c'*/ 28, 91 /*'d'*/ 29, 92 /*'e'*/ 30, 93 /*'f'*/ 31, 94 /*'g'*/ 32, 95 /*'h'*/ 33, 96 /*'i'*/ 34, 97 /*'j'*/ 35, 98 /*'k'*/ 36, 99 /*'l'*/ 37, 100 /*'m'*/ 38, 101 /*'n'*/ 39, 102 /*'o'*/ 40, 103 /*'p'*/ 41, 104 /*'q'*/ 42, 105 /*'r'*/ 43, 106 /*'s'*/ 44, 107 /*'t'*/ 45, 108 /*'u'*/ 46, 109 /*'v'*/ 47, 110 /*'w'*/ 48, 111 /*'x'*/ 49, 112 /*'y'*/ 50, 113 /*'z'*/ 51 114 }; 115 116 public final Object decodeFromBytes(byte[] b, int start, int length) throws EncodingAlgorithmException { 117 final byte[] data = new byte[length]; 118 System.arraycopy(b, start, data, 0, length); 119 return data; 120 } 121 122 public final Object decodeFromInputStream(InputStream s) throws IOException { 123 throw new UnsupportedOperationException(CommonResourceBundle.getInstance().getString("message.notImplemented")); 124 } 125 126 127 public void encodeToOutputStream(Object data, OutputStream s) throws IOException { 128 if (!(data instanceof byte[])) { 129 throw new IllegalArgumentException(CommonResourceBundle.getInstance().getString("message.dataNotByteArray")); 130 } 131 132 s.write((byte[])data); 133 } 134 135 public final Object convertFromCharacters(char[] ch, int start, int length) { 136 if (length == 0) { 137 return new byte[0]; 138 } 139 140 StringBuilder encodedValue = removeWhitespace(ch, start, length); 141 int encodedLength = encodedValue.length(); 142 if (encodedLength == 0) { 143 return new byte[0]; 144 } 145 146 int blockCount = encodedLength / 4; 147 int partialBlockLength = 3; 148 149 if (encodedValue.charAt(encodedLength - 1) == '=') { 150 --partialBlockLength; 151 if (encodedValue.charAt(encodedLength - 2) == '=') { 152 --partialBlockLength; 153 } 154 } 155 156 int valueLength = (blockCount - 1) * 3 + partialBlockLength; 157 byte[] value = new byte[valueLength]; 158 159 int idx = 0; 160 int encodedIdx = 0; 161 for (int i = 0; i < blockCount; ++i) { 162 int x1 = decodeBase64[encodedValue.charAt(encodedIdx++) - '+']; 163 int x2 = decodeBase64[encodedValue.charAt(encodedIdx++) - '+']; 164 int x3 = decodeBase64[encodedValue.charAt(encodedIdx++) - '+']; 165 int x4 = decodeBase64[encodedValue.charAt(encodedIdx++) - '+']; 166 167 value[idx++] = (byte) ((x1 << 2) | (x2 >> 4)); 168 if (idx < valueLength) { 169 value[idx++] = (byte) (((x2 & 0x0f) << 4) | (x3 >> 2)); 170 } 171 if (idx < valueLength) { 172 value[idx++] = (byte) (((x3 & 0x03) << 6) | x4); 173 } 174 } 175 176 return value; 177 } 178 179 public final void convertToCharacters(Object data, StringBuffer s) { 180 if (data == null) { 181 return; 182 } 183 final byte[] value = (byte[]) data; 184 185 convertToCharacters(value, 0, value.length, s); 186 } 187 188 public final int getPrimtiveLengthFromOctetLength(int octetLength) throws EncodingAlgorithmException { 189 return octetLength; 190 } 191 192 public int getOctetLengthFromPrimitiveLength(int primitiveLength) { 193 return primitiveLength; 194 } 195 196 public final void encodeToBytes(Object array, int astart, int alength, byte[] b, int start) { 197 System.arraycopy((byte[])array, astart, b, start, alength); 198 } 199 200 public final void convertToCharacters(byte[] data, int offset, int length, StringBuffer s) { 201 if (data == null) { 202 return; 203 } 204 final byte[] value = data; 205 if (length == 0) { 206 return; 207 } 208 209 final int partialBlockLength = length % 3; 210 final int blockCount = (partialBlockLength != 0) ? 211 length / 3 + 1 : 212 length / 3; 213 214 final int encodedLength = blockCount * 4; 215 final int originalBufferSize = s.length(); 216 s.ensureCapacity(encodedLength + originalBufferSize); 217 218 int idx = offset; 219 int lastIdx = offset + length; 220 for (int i = 0; i < blockCount; ++i) { 221 int b1 = value[idx++] & 0xFF; 222 int b2 = (idx < lastIdx) ? value[idx++] & 0xFF : 0; 223 int b3 = (idx < lastIdx) ? value[idx++] & 0xFF : 0; 224 225 s.append(encodeBase64[b1 >> 2]); 226 227 s.append(encodeBase64[((b1 & 0x03) << 4) | (b2 >> 4)]); 228 229 s.append(encodeBase64[((b2 & 0x0f) << 2) | (b3 >> 6)]); 230 231 s.append(encodeBase64[b3 & 0x3f]); 232 } 233 234 switch (partialBlockLength) { 235 case 1 : 236 s.setCharAt(originalBufferSize + encodedLength - 1, '='); 237 s.setCharAt(originalBufferSize + encodedLength - 2, '='); 238 break; 239 case 2 : 240 s.setCharAt(originalBufferSize + encodedLength - 1, '='); 241 break; 242 } 243 } 244} 245