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55 package org.jboss.axis.encoding;
56
57 import org.jboss.axis.utils.JavaUtils;
58 import org.jboss.axis.utils.Messages;
59
60 import java.io.IOException  ;
61 import java.io.OutputStream ;
62 import java.io.Writer ;
63
64
67 public class Base64
68 {
69 private static final char[] S_BASE64CHAR = {
70 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J',
71 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T',
72 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd',
73 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
74 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x',
75 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7',
76 '8', '9', '+', '/'
77 };
78 private static final char S_BASE64PAD = '=';
79 private static final byte[] S_DECODETABLE = new byte[128];
80
81 static
82 {
83 for (int i = 0; i < S_DECODETABLE.length; i++)
84 S_DECODETABLE[i] = Byte.MAX_VALUE; for (int i = 0; i < S_BASE64CHAR.length; i++) S_DECODETABLE[S_BASE64CHAR[i]] = (byte)i;
87 }
88
89 private static int decode0(char[] ibuf, byte[] obuf, int wp)
90 {
91 int outlen = 3;
92 if (ibuf[3] == S_BASE64PAD) outlen = 2;
93 if (ibuf[2] == S_BASE64PAD) outlen = 1;
94 int b0 = S_DECODETABLE[ibuf[0]];
95 int b1 = S_DECODETABLE[ibuf[1]];
96 int b2 = S_DECODETABLE[ibuf[2]];
97 int b3 = S_DECODETABLE[ibuf[3]];
98 switch (outlen)
99 {
100 case 1:
101 obuf[wp] = (byte)(b0 << 2 & 0xfc | b1 >> 4 & 0x3);
102 return 1;
103 case 2:
104 obuf[wp++] = (byte)(b0 << 2 & 0xfc | b1 >> 4 & 0x3);
105 obuf[wp] = (byte)(b1 << 4 & 0xf0 | b2 >> 2 & 0xf);
106 return 2;
107 case 3:
108 obuf[wp++] = (byte)(b0 << 2 & 0xfc | b1 >> 4 & 0x3);
109 obuf[wp++] = (byte)(b1 << 4 & 0xf0 | b2 >> 2 & 0xf);
110 obuf[wp] = (byte)(b2 << 6 & 0xc0 | b3 & 0x3f);
111 return 3;
112 default:
113 throw new RuntimeException (Messages.getMessage("internalError00"));
114 }
115 }
116
117
120 public static byte[] decode(char[] data, int off, int len)
121 {
122 char[] ibuf = new char[4];
123 int ibufcount = 0;
124 byte[] obuf = new byte[len / 4 * 3 + 3];
125 int obufcount = 0;
126 for (int i = off; i < off + len; i++)
127 {
128 char ch = data[i];
129 if (ch == S_BASE64PAD
130 || ch < S_DECODETABLE.length && S_DECODETABLE[ch] != Byte.MAX_VALUE)
131 {
132 ibuf[ibufcount++] = ch;
133 if (ibufcount == ibuf.length)
134 {
135 ibufcount = 0;
136 obufcount += decode0(ibuf, obuf, obufcount);
137 }
138 }
139 }
140 if (obufcount == obuf.length)
141 return obuf;
142 byte[] ret = new byte[obufcount];
143 System.arraycopy(obuf, 0, ret, 0, obufcount);
144 return ret;
145 }
146
147
150 public static byte[] decode(String data)
151 {
152 char[] ibuf = new char[4];
153 int ibufcount = 0;
154 byte[] obuf = new byte[data.length() / 4 * 3 + 3];
155 int obufcount = 0;
156 for (int i = 0; i < data.length(); i++)
157 {
158 char ch = data.charAt(i);
159 if (ch == S_BASE64PAD
160 || ch < S_DECODETABLE.length && S_DECODETABLE[ch] != Byte.MAX_VALUE)
161 {
162 ibuf[ibufcount++] = ch;
163 if (ibufcount == ibuf.length)
164 {
165 ibufcount = 0;
166 obufcount += decode0(ibuf, obuf, obufcount);
167 }
168 }
169 }
170 if (obufcount == obuf.length)
171 return obuf;
172 byte[] ret = new byte[obufcount];
173 System.arraycopy(obuf, 0, ret, 0, obufcount);
174 return ret;
175 }
176
177
180 public static void decode(char[] data, int off, int len, OutputStream ostream) throws IOException
181 {
182 char[] ibuf = new char[4];
183 int ibufcount = 0;
184 byte[] obuf = new byte[3];
185 for (int i = off; i < off + len; i++)
186 {
187 char ch = data[i];
188 if (ch == S_BASE64PAD
189 || ch < S_DECODETABLE.length && S_DECODETABLE[ch] != Byte.MAX_VALUE)
190 {
191 ibuf[ibufcount++] = ch;
192 if (ibufcount == ibuf.length)
193 {
194 ibufcount = 0;
195 int obufcount = decode0(ibuf, obuf, 0);
196 ostream.write(obuf, 0, obufcount);
197 }
198 }
199 }
200 }
201
202
205 public static void decode(String data, OutputStream ostream) throws IOException
206 {
207 char[] ibuf = new char[4];
208 int ibufcount = 0;
209 byte[] obuf = new byte[3];
210 for (int i = 0; i < data.length(); i++)
211 {
212 char ch = data.charAt(i);
213 if (ch == S_BASE64PAD
214 || ch < S_DECODETABLE.length && S_DECODETABLE[ch] != Byte.MAX_VALUE)
215 {
216 ibuf[ibufcount++] = ch;
217 if (ibufcount == ibuf.length)
218 {
219 ibufcount = 0;
220 int obufcount = decode0(ibuf, obuf, 0);
221 ostream.write(obuf, 0, obufcount);
222 }
223 }
224 }
225 }
226
227
230 public static String encode(byte[] data)
231 {
232 return encode(data, 0, data.length);
233 }
234
235
238 public static String encode(byte[] data, int off, int len)
239 {
240 if (len <= 0) return "";
241 char[] out = new char[len / 3 * 4 + 4];
242 int rindex = off;
243 int windex = 0;
244 int rest = len - off;
245 while (rest >= 3)
246 {
247 int i = ((data[rindex] & 0xff) << 16)
248 + ((data[rindex + 1] & 0xff) << 8)
249 + (data[rindex + 2] & 0xff);
250 out[windex++] = S_BASE64CHAR[i >> 18];
251 out[windex++] = S_BASE64CHAR[(i >> 12) & 0x3f];
252 out[windex++] = S_BASE64CHAR[(i >> 6) & 0x3f];
253 out[windex++] = S_BASE64CHAR[i & 0x3f];
254 rindex += 3;
255 rest -= 3;
256 }
257 if (rest == 1)
258 {
259 int i = data[rindex] & 0xff;
260 out[windex++] = S_BASE64CHAR[i >> 2];
261 out[windex++] = S_BASE64CHAR[(i << 4) & 0x3f];
262 out[windex++] = S_BASE64PAD;
263 out[windex++] = S_BASE64PAD;
264 }
265 else if (rest == 2)
266 {
267 int i = ((data[rindex] & 0xff) << 8) + (data[rindex + 1] & 0xff);
268 out[windex++] = S_BASE64CHAR[i >> 10];
269 out[windex++] = S_BASE64CHAR[(i >> 4) & 0x3f];
270 out[windex++] = S_BASE64CHAR[(i << 2) & 0x3f];
271 out[windex++] = S_BASE64PAD;
272 }
273 return new String (out, 0, windex);
274 }
275
276
279 public static void encode(byte[] data, int off, int len, OutputStream ostream) throws IOException
280 {
281 if (len <= 0) return;
282 byte[] out = new byte[4];
283 int rindex = off;
284 int rest = len - off;
285 while (rest >= 3)
286 {
287 int i = ((data[rindex] & 0xff) << 16)
288 + ((data[rindex + 1] & 0xff) << 8)
289 + (data[rindex + 2] & 0xff);
290 out[0] = (byte)S_BASE64CHAR[i >> 18];
291 out[1] = (byte)S_BASE64CHAR[(i >> 12) & 0x3f];
292 out[2] = (byte)S_BASE64CHAR[(i >> 6) & 0x3f];
293 out[3] = (byte)S_BASE64CHAR[i & 0x3f];
294 ostream.write(out, 0, 4);
295 rindex += 3;
296 rest -= 3;
297 }
298 if (rest == 1)
299 {
300 int i = data[rindex] & 0xff;
301 out[0] = (byte)S_BASE64CHAR[i >> 2];
302 out[1] = (byte)S_BASE64CHAR[(i << 4) & 0x3f];
303 out[2] = (byte)S_BASE64PAD;
304 out[3] = (byte)S_BASE64PAD;
305 ostream.write(out, 0, 4);
306 }
307 else if (rest == 2)
308 {
309 int i = ((data[rindex] & 0xff) << 8) + (data[rindex + 1] & 0xff);
310 out[0] = (byte)S_BASE64CHAR[i >> 10];
311 out[1] = (byte)S_BASE64CHAR[(i >> 4) & 0x3f];
312 out[2] = (byte)S_BASE64CHAR[(i << 2) & 0x3f];
313 out[3] = (byte)S_BASE64PAD;
314 ostream.write(out, 0, 4);
315 }
316 }
317
318
321 public static void encode(byte[] data, int off, int len, Writer writer) throws IOException
322 {
323 if (len <= 0) return;
324 char[] out = new char[4];
325 int rindex = off;
326 int rest = len - off;
327 int output = 0;
328 while (rest >= 3)
329 {
330 int i = ((data[rindex] & 0xff) << 16)
331 + ((data[rindex + 1] & 0xff) << 8)
332 + (data[rindex + 2] & 0xff);
333 out[0] = S_BASE64CHAR[i >> 18];
334 out[1] = S_BASE64CHAR[(i >> 12) & 0x3f];
335 out[2] = S_BASE64CHAR[(i >> 6) & 0x3f];
336 out[3] = S_BASE64CHAR[i & 0x3f];
337 writer.write(out, 0, 4);
338 rindex += 3;
339 rest -= 3;
340 output += 4;
341 if (output % 76 == 0)
342 writer.write(JavaUtils.LS);
343 }
344 if (rest == 1)
345 {
346 int i = data[rindex] & 0xff;
347 out[0] = S_BASE64CHAR[i >> 2];
348 out[1] = S_BASE64CHAR[(i << 4) & 0x3f];
349 out[2] = S_BASE64PAD;
350 out[3] = S_BASE64PAD;
351 writer.write(out, 0, 4);
352 }
353 else if (rest == 2)
354 {
355 int i = ((data[rindex] & 0xff) << 8) + (data[rindex + 1] & 0xff);
356 out[0] = S_BASE64CHAR[i >> 10];
357 out[1] = S_BASE64CHAR[(i >> 4) & 0x3f];
358 out[2] = S_BASE64CHAR[(i << 2) & 0x3f];
359 out[3] = S_BASE64PAD;
360 writer.write(out, 0, 4);
361 }
362 }
363 }
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