Author: dims
Date: Thu Mar 1 07:22:55 2007
New Revision: 513385
URL: http://svn.apache.org/viewvc?view=rev&rev=513385
Log:
Fix for WSCOMMONS-176 - Check method for valid Base64 encoding
Modified:
webservices/commons/trunk/modules/axiom/modules/axiom-api/src/main/java/org/apache/axiom/om/util/Base64.java
Modified:
webservices/commons/trunk/modules/axiom/modules/axiom-api/src/main/java/org/apache/axiom/om/util/Base64.java
URL:
http://svn.apache.org/viewvc/webservices/commons/trunk/modules/axiom/modules/axiom-api/src/main/java/org/apache/axiom/om/util/Base64.java?view=diff&rev=513385&r1=513384&r2=513385
==============================================================================
---
webservices/commons/trunk/modules/axiom/modules/axiom-api/src/main/java/org/apache/axiom/om/util/Base64.java
(original)
+++
webservices/commons/trunk/modules/axiom/modules/axiom-api/src/main/java/org/apache/axiom/om/util/Base64.java
Thu Mar 1 07:22:55 2007
@@ -1,335 +1,359 @@
-package org.apache.axiom.om.util;
-
-import java.io.IOException;
-import java.io.OutputStream;
-import java.io.Writer;
-
-/*
- * Copyright 2001-2004 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.
- *
- */
-
-public class Base64 {
- private static final char[] S_BASE64CHAR = {'A', 'B', 'C', 'D', 'E', 'F',
- 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S',
- 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
- 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's',
- 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5',
- '6', '7', '8', '9', '+', '/'};
-
- private static final char S_BASE64PAD = '=';
-
- private static final byte[] S_DECODETABLE = new byte[128];
-
- static {
- for (int i = 0; i < S_DECODETABLE.length; i++)
- S_DECODETABLE[i] = Byte.MAX_VALUE; // 127
- for (int i = 0; i < S_BASE64CHAR.length; i++)
- // 0 to 63
- S_DECODETABLE[S_BASE64CHAR[i]] = (byte) i;
- }
-
- private static int decode0(char[] ibuf, byte[] obuf, int wp) {
- int outlen = 3;
- if (ibuf[3] == S_BASE64PAD)
- outlen = 2;
- if (ibuf[2] == S_BASE64PAD)
- outlen = 1;
- int b0 = S_DECODETABLE[ibuf[0]];
- int b1 = S_DECODETABLE[ibuf[1]];
- int b2 = S_DECODETABLE[ibuf[2]];
- int b3 = S_DECODETABLE[ibuf[3]];
- switch (outlen) {
- case 1:
- obuf[wp] = (byte) (b0 << 2 & 0xfc | b1 >> 4 & 0x3);
- return 1;
- case 2:
- obuf[wp++] = (byte) (b0 << 2 & 0xfc | b1 >> 4 & 0x3);
- obuf[wp] = (byte) (b1 << 4 & 0xf0 | b2 >> 2 & 0xf);
- return 2;
- case 3:
- obuf[wp++] = (byte) (b0 << 2 & 0xfc | b1 >> 4 & 0x3);
- obuf[wp++] = (byte) (b1 << 4 & 0xf0 | b2 >> 2 & 0xf);
- obuf[wp] = (byte) (b2 << 6 & 0xc0 | b3 & 0x3f);
- return 3;
- default:
- throw new RuntimeException("internalError00");
- }
- }
-
- /**
- *
- */
- public static byte[] decode(char[] data, int off, int len) {
- char[] ibuf = new char[4];
- int ibufcount = 0;
- byte[] obuf = new byte[len / 4 * 3 + 3];
- int obufcount = 0;
- for (int i = off; i < off + len; i++) {
- char ch = data[i];
- if (ch == S_BASE64PAD || ch < S_DECODETABLE.length
- && S_DECODETABLE[ch] != Byte.MAX_VALUE) {
- ibuf[ibufcount++] = ch;
- if (ibufcount == ibuf.length) {
- ibufcount = 0;
- obufcount += decode0(ibuf, obuf, obufcount);
- }
- }
- }
- if (obufcount == obuf.length)
- return obuf;
- byte[] ret = new byte[obufcount];
- System.arraycopy(obuf, 0, ret, 0, obufcount);
- return ret;
- }
-
- /**
- *
- */
- public static byte[] decode(String data) {
- char[] ibuf = new char[4];
- int ibufcount = 0;
- byte[] obuf = new byte[data.length() / 4 * 3 + 3];
- int obufcount = 0;
- for (int i = 0; i < data.length(); i++) {
- char ch = data.charAt(i);
- if (ch == S_BASE64PAD || ch < S_DECODETABLE.length
- && S_DECODETABLE[ch] != Byte.MAX_VALUE) {
- ibuf[ibufcount++] = ch;
- if (ibufcount == ibuf.length) {
- ibufcount = 0;
- obufcount += decode0(ibuf, obuf, obufcount);
- }
- }
- }
- if (obufcount == obuf.length)
- return obuf;
- byte[] ret = new byte[obufcount];
- System.arraycopy(obuf, 0, ret, 0, obufcount);
- return ret;
- }
-
- /**
- *
- */
- public static void decode(char[] data, int off, int len,
- OutputStream ostream) throws IOException {
- char[] ibuf = new char[4];
- int ibufcount = 0;
- byte[] obuf = new byte[3];
- for (int i = off; i < off + len; i++) {
- char ch = data[i];
- if (ch == S_BASE64PAD || ch < S_DECODETABLE.length
- && S_DECODETABLE[ch] != Byte.MAX_VALUE) {
- ibuf[ibufcount++] = ch;
- if (ibufcount == ibuf.length) {
- ibufcount = 0;
- int obufcount = decode0(ibuf, obuf, 0);
- ostream.write(obuf, 0, obufcount);
- }
- }
- }
- }
-
- /**
- *
- */
- public static void decode(String data, OutputStream ostream)
- throws IOException {
- char[] ibuf = new char[4];
- int ibufcount = 0;
- byte[] obuf = new byte[3];
- for (int i = 0; i < data.length(); i++) {
- char ch = data.charAt(i);
- if (ch == S_BASE64PAD || ch < S_DECODETABLE.length
- && S_DECODETABLE[ch] != Byte.MAX_VALUE) {
- ibuf[ibufcount++] = ch;
- if (ibufcount == ibuf.length) {
- ibufcount = 0;
- int obufcount = decode0(ibuf, obuf, 0);
- ostream.write(obuf, 0, obufcount);
- }
- }
- }
- }
-
- /**
- * Returns base64 representation of specified byte array.
- */
- public static String encode(byte[] data) {
- return encode(data, 0, data.length);
- }
-
- /**
- * Returns base64 representation of specified byte array.
- */
- public static String encode(byte[] data, int off, int len) {
- if (len <= 0)
- return "";
- char[] out = new char[len / 3 * 4 + 4];
- int rindex = off;
- int windex = 0;
- int rest = len - off;
- while (rest >= 3) {
- int i = ((data[rindex] & 0xff) << 16)
- + ((data[rindex + 1] & 0xff) << 8)
- + (data[rindex + 2] & 0xff);
- out[windex++] = S_BASE64CHAR[i >> 18];
- out[windex++] = S_BASE64CHAR[(i >> 12) & 0x3f];
- out[windex++] = S_BASE64CHAR[(i >> 6) & 0x3f];
- out[windex++] = S_BASE64CHAR[i & 0x3f];
- rindex += 3;
- rest -= 3;
- }
- if (rest == 1) {
- int i = data[rindex] & 0xff;
- out[windex++] = S_BASE64CHAR[i >> 2];
- out[windex++] = S_BASE64CHAR[(i << 4) & 0x3f];
- out[windex++] = S_BASE64PAD;
- out[windex++] = S_BASE64PAD;
- } else if (rest == 2) {
- int i = ((data[rindex] & 0xff) << 8) + (data[rindex + 1] & 0xff);
- out[windex++] = S_BASE64CHAR[i >> 10];
- out[windex++] = S_BASE64CHAR[(i >> 4) & 0x3f];
- out[windex++] = S_BASE64CHAR[(i << 2) & 0x3f];
- out[windex++] = S_BASE64PAD;
- }
- return new String(out, 0, windex);
- }
-
- /**
- * Outputs base64 representation of the specified byte array to the
specified String Buffer
- */
- public static void encode(byte[] data, int off, int len, StringBuffer
buffer) {
- if (len <= 0) {
- return;
- }
-
- char[] out = new char[4];
- int rindex = off;
- int rest = len - off;
- while (rest >= 3) {
- int i = ((data[rindex] & 0xff) << 16)
- + ((data[rindex + 1] & 0xff) << 8)
- + (data[rindex + 2] & 0xff);
- out[0] = S_BASE64CHAR[i >> 18];
- out[1] = S_BASE64CHAR[(i >> 12) & 0x3f];
- out[2] = S_BASE64CHAR[(i >> 6) & 0x3f];
- out[3] = S_BASE64CHAR[i & 0x3f];
- buffer.append(out);
- rindex += 3;
- rest -= 3;
- }
- if (rest == 1) {
- int i = data[rindex] & 0xff;
- out[0] = S_BASE64CHAR[i >> 2];
- out[1] = S_BASE64CHAR[(i << 4) & 0x3f];
- out[2] = S_BASE64PAD;
- out[3] = S_BASE64PAD;
- buffer.append(out);
- } else if (rest == 2) {
- int i = ((data[rindex] & 0xff) << 8) + (data[rindex + 1] & 0xff);
- out[0] = S_BASE64CHAR[i >> 10];
- out[1] = S_BASE64CHAR[(i >> 4) & 0x3f];
- out[2] = S_BASE64CHAR[(i << 2) & 0x3f];
- out[3] = S_BASE64PAD;
- buffer.append(out);
- }
- }
-
- /**
- * Outputs base64 representation of the specified byte array to a byte
- * stream.
- */
- public static void encode(byte[] data, int off, int len,
- OutputStream ostream) throws IOException {
- if (len <= 0)
- return;
- byte[] out = new byte[4];
- int rindex = off;
- int rest = len - off;
- while (rest >= 3) {
- int i = ((data[rindex] & 0xff) << 16)
- + ((data[rindex + 1] & 0xff) << 8)
- + (data[rindex + 2] & 0xff);
- out[0] = (byte) S_BASE64CHAR[i >> 18];
- out[1] = (byte) S_BASE64CHAR[(i >> 12) & 0x3f];
- out[2] = (byte) S_BASE64CHAR[(i >> 6) & 0x3f];
- out[3] = (byte) S_BASE64CHAR[i & 0x3f];
- ostream.write(out, 0, 4);
- rindex += 3;
- rest -= 3;
- }
- if (rest == 1) {
- int i = data[rindex] & 0xff;
- out[0] = (byte) S_BASE64CHAR[i >> 2];
- out[1] = (byte) S_BASE64CHAR[(i << 4) & 0x3f];
- out[2] = (byte) S_BASE64PAD;
- out[3] = (byte) S_BASE64PAD;
- ostream.write(out, 0, 4);
- } else if (rest == 2) {
- int i = ((data[rindex] & 0xff) << 8) + (data[rindex + 1] & 0xff);
- out[0] = (byte) S_BASE64CHAR[i >> 10];
- out[1] = (byte) S_BASE64CHAR[(i >> 4) & 0x3f];
- out[2] = (byte) S_BASE64CHAR[(i << 2) & 0x3f];
- out[3] = (byte) S_BASE64PAD;
- ostream.write(out, 0, 4);
- }
- }
-
- /**
- * Outputs base64 representation of the specified byte array to a character
- * stream.
- */
- public static void encode(byte[] data, int off, int len, Writer writer)
- throws IOException {
- if (len <= 0)
- return;
- char[] out = new char[4];
- int rindex = off;
- int rest = len - off;
- int output = 0;
- while (rest >= 3) {
- int i = ((data[rindex] & 0xff) << 16)
- + ((data[rindex + 1] & 0xff) << 8)
- + (data[rindex + 2] & 0xff);
- out[0] = S_BASE64CHAR[i >> 18];
- out[1] = S_BASE64CHAR[(i >> 12) & 0x3f];
- out[2] = S_BASE64CHAR[(i >> 6) & 0x3f];
- out[3] = S_BASE64CHAR[i & 0x3f];
- writer.write(out, 0, 4);
- rindex += 3;
- rest -= 3;
- output += 4;
- if (output % 76 == 0)
- writer.write("\n");
- }
- if (rest == 1) {
- int i = data[rindex] & 0xff;
- out[0] = S_BASE64CHAR[i >> 2];
- out[1] = S_BASE64CHAR[(i << 4) & 0x3f];
- out[2] = S_BASE64PAD;
- out[3] = S_BASE64PAD;
- writer.write(out, 0, 4);
- } else if (rest == 2) {
- int i = ((data[rindex] & 0xff) << 8) + (data[rindex + 1] & 0xff);
- out[0] = S_BASE64CHAR[i >> 10];
- out[1] = S_BASE64CHAR[(i >> 4) & 0x3f];
- out[2] = S_BASE64CHAR[(i << 2) & 0x3f];
- out[3] = S_BASE64PAD;
- writer.write(out, 0, 4);
- }
- }
-}
+package org.apache.axiom.om.util;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.Writer;
+
+/*
+ * Copyright 2001-2004 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.
+ *
+ */
+
+public class Base64 {
+ private static final char[] S_BASE64CHAR = {'A', 'B', 'C', 'D', 'E', 'F',
+ 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S',
+ 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
+ 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's',
+ 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5',
+ '6', '7', '8', '9', '+', '/'};
+
+ private static final char S_BASE64PAD = '=';
+
+ private static final byte[] S_DECODETABLE = new byte[128];
+
+ static {
+ for (int i = 0; i < S_DECODETABLE.length; i++)
+ S_DECODETABLE[i] = Byte.MAX_VALUE; // 127
+ for (int i = 0; i < S_BASE64CHAR.length; i++)
+ // 0 to 63
+ S_DECODETABLE[S_BASE64CHAR[i]] = (byte) i;
+ }
+
+ private static int decode0(char[] ibuf, byte[] obuf, int wp) {
+ int outlen = 3;
+ if (ibuf[3] == S_BASE64PAD)
+ outlen = 2;
+ if (ibuf[2] == S_BASE64PAD)
+ outlen = 1;
+ int b0 = S_DECODETABLE[ibuf[0]];
+ int b1 = S_DECODETABLE[ibuf[1]];
+ int b2 = S_DECODETABLE[ibuf[2]];
+ int b3 = S_DECODETABLE[ibuf[3]];
+ switch (outlen) {
+ case 1:
+ obuf[wp] = (byte) (b0 << 2 & 0xfc | b1 >> 4 & 0x3);
+ return 1;
+ case 2:
+ obuf[wp++] = (byte) (b0 << 2 & 0xfc | b1 >> 4 & 0x3);
+ obuf[wp] = (byte) (b1 << 4 & 0xf0 | b2 >> 2 & 0xf);
+ return 2;
+ case 3:
+ obuf[wp++] = (byte) (b0 << 2 & 0xfc | b1 >> 4 & 0x3);
+ obuf[wp++] = (byte) (b1 << 4 & 0xf0 | b2 >> 2 & 0xf);
+ obuf[wp] = (byte) (b2 << 6 & 0xc0 | b3 & 0x3f);
+ return 3;
+ default:
+ throw new RuntimeException("internalError00");
+ }
+ }
+
+ /**
+ *
+ */
+ public static byte[] decode(char[] data, int off, int len) {
+ char[] ibuf = new char[4];
+ int ibufcount = 0;
+ byte[] obuf = new byte[len / 4 * 3 + 3];
+ int obufcount = 0;
+ for (int i = off; i < off + len; i++) {
+ char ch = data[i];
+ if (ch == S_BASE64PAD || ch < S_DECODETABLE.length
+ && S_DECODETABLE[ch] != Byte.MAX_VALUE) {
+ ibuf[ibufcount++] = ch;
+ if (ibufcount == ibuf.length) {
+ ibufcount = 0;
+ obufcount += decode0(ibuf, obuf, obufcount);
+ }
+ }
+ }
+ if (obufcount == obuf.length)
+ return obuf;
+ byte[] ret = new byte[obufcount];
+ System.arraycopy(obuf, 0, ret, 0, obufcount);
+ return ret;
+ }
+
+ /**
+ *
+ */
+ public static byte[] decode(String data) {
+ char[] ibuf = new char[4];
+ int ibufcount = 0;
+ byte[] obuf = new byte[data.length() / 4 * 3 + 3];
+ int obufcount = 0;
+ for (int i = 0; i < data.length(); i++) {
+ char ch = data.charAt(i);
+ if (ch == S_BASE64PAD || ch < S_DECODETABLE.length
+ && S_DECODETABLE[ch] != Byte.MAX_VALUE) {
+ ibuf[ibufcount++] = ch;
+ if (ibufcount == ibuf.length) {
+ ibufcount = 0;
+ obufcount += decode0(ibuf, obuf, obufcount);
+ }
+ }
+ }
+ if (obufcount == obuf.length)
+ return obuf;
+ byte[] ret = new byte[obufcount];
+ System.arraycopy(obuf, 0, ret, 0, obufcount);
+ return ret;
+ }
+
+ /**
+ * checks input string for invalid Base64 characters
+ * @param data
+ * @return true, if String contains only valid Base64 characters.
+ * false, otherwise
+ */
+ public static boolean isValidBase64Encoding(String data) {
+ for (int i = 0; i < data.length(); i++) {
+ char ch = data.charAt(i);
+
+ if (ch == S_BASE64PAD || ch < S_DECODETABLE.length
+ && S_DECODETABLE[ch] != Byte.MAX_VALUE) {
+ //valid character.Do nothing
+ }else if(ch == '\r' || ch == '\n'){
+ //do nothing
+ }
+ else{
+ return false;
+ }
+ }//iterate over all characters in the string
+ return true;
+ }
+
+
+ /**
+ *
+ */
+ public static void decode(char[] data, int off, int len,
+ OutputStream ostream) throws IOException {
+ char[] ibuf = new char[4];
+ int ibufcount = 0;
+ byte[] obuf = new byte[3];
+ for (int i = off; i < off + len; i++) {
+ char ch = data[i];
+ if (ch == S_BASE64PAD || ch < S_DECODETABLE.length
+ && S_DECODETABLE[ch] != Byte.MAX_VALUE) {
+ ibuf[ibufcount++] = ch;
+ if (ibufcount == ibuf.length) {
+ ibufcount = 0;
+ int obufcount = decode0(ibuf, obuf, 0);
+ ostream.write(obuf, 0, obufcount);
+ }
+ }
+ }
+ }
+
+ /**
+ *
+ */
+ public static void decode(String data, OutputStream ostream)
+ throws IOException {
+ char[] ibuf = new char[4];
+ int ibufcount = 0;
+ byte[] obuf = new byte[3];
+ for (int i = 0; i < data.length(); i++) {
+ char ch = data.charAt(i);
+ if (ch == S_BASE64PAD || ch < S_DECODETABLE.length
+ && S_DECODETABLE[ch] != Byte.MAX_VALUE) {
+ ibuf[ibufcount++] = ch;
+ if (ibufcount == ibuf.length) {
+ ibufcount = 0;
+ int obufcount = decode0(ibuf, obuf, 0);
+ ostream.write(obuf, 0, obufcount);
+ }
+ }
+ }
+ }
+
+ /**
+ * Returns base64 representation of specified byte array.
+ */
+ public static String encode(byte[] data) {
+ return encode(data, 0, data.length);
+ }
+
+ /**
+ * Returns base64 representation of specified byte array.
+ */
+ public static String encode(byte[] data, int off, int len) {
+ if (len <= 0)
+ return "";
+ char[] out = new char[len / 3 * 4 + 4];
+ int rindex = off;
+ int windex = 0;
+ int rest = len - off;
+ while (rest >= 3) {
+ int i = ((data[rindex] & 0xff) << 16)
+ + ((data[rindex + 1] & 0xff) << 8)
+ + (data[rindex + 2] & 0xff);
+ out[windex++] = S_BASE64CHAR[i >> 18];
+ out[windex++] = S_BASE64CHAR[(i >> 12) & 0x3f];
+ out[windex++] = S_BASE64CHAR[(i >> 6) & 0x3f];
+ out[windex++] = S_BASE64CHAR[i & 0x3f];
+ rindex += 3;
+ rest -= 3;
+ }
+ if (rest == 1) {
+ int i = data[rindex] & 0xff;
+ out[windex++] = S_BASE64CHAR[i >> 2];
+ out[windex++] = S_BASE64CHAR[(i << 4) & 0x3f];
+ out[windex++] = S_BASE64PAD;
+ out[windex++] = S_BASE64PAD;
+ } else if (rest == 2) {
+ int i = ((data[rindex] & 0xff) << 8) + (data[rindex + 1] & 0xff);
+ out[windex++] = S_BASE64CHAR[i >> 10];
+ out[windex++] = S_BASE64CHAR[(i >> 4) & 0x3f];
+ out[windex++] = S_BASE64CHAR[(i << 2) & 0x3f];
+ out[windex++] = S_BASE64PAD;
+ }
+ return new String(out, 0, windex);
+ }
+
+ /**
+ * Outputs base64 representation of the specified byte array to the
specified String Buffer
+ */
+ public static void encode(byte[] data, int off, int len, StringBuffer
buffer) {
+ if (len <= 0) {
+ return;
+ }
+
+ char[] out = new char[4];
+ int rindex = off;
+ int rest = len - off;
+ while (rest >= 3) {
+ int i = ((data[rindex] & 0xff) << 16)
+ + ((data[rindex + 1] & 0xff) << 8)
+ + (data[rindex + 2] & 0xff);
+ out[0] = S_BASE64CHAR[i >> 18];
+ out[1] = S_BASE64CHAR[(i >> 12) & 0x3f];
+ out[2] = S_BASE64CHAR[(i >> 6) & 0x3f];
+ out[3] = S_BASE64CHAR[i & 0x3f];
+ buffer.append(out);
+ rindex += 3;
+ rest -= 3;
+ }
+ if (rest == 1) {
+ int i = data[rindex] & 0xff;
+ out[0] = S_BASE64CHAR[i >> 2];
+ out[1] = S_BASE64CHAR[(i << 4) & 0x3f];
+ out[2] = S_BASE64PAD;
+ out[3] = S_BASE64PAD;
+ buffer.append(out);
+ } else if (rest == 2) {
+ int i = ((data[rindex] & 0xff) << 8) + (data[rindex + 1] & 0xff);
+ out[0] = S_BASE64CHAR[i >> 10];
+ out[1] = S_BASE64CHAR[(i >> 4) & 0x3f];
+ out[2] = S_BASE64CHAR[(i << 2) & 0x3f];
+ out[3] = S_BASE64PAD;
+ buffer.append(out);
+ }
+ }
+
+ /**
+ * Outputs base64 representation of the specified byte array to a byte
+ * stream.
+ */
+ public static void encode(byte[] data, int off, int len,
+ OutputStream ostream) throws IOException {
+ if (len <= 0)
+ return;
+ byte[] out = new byte[4];
+ int rindex = off;
+ int rest = len - off;
+ while (rest >= 3) {
+ int i = ((data[rindex] & 0xff) << 16)
+ + ((data[rindex + 1] & 0xff) << 8)
+ + (data[rindex + 2] & 0xff);
+ out[0] = (byte) S_BASE64CHAR[i >> 18];
+ out[1] = (byte) S_BASE64CHAR[(i >> 12) & 0x3f];
+ out[2] = (byte) S_BASE64CHAR[(i >> 6) & 0x3f];
+ out[3] = (byte) S_BASE64CHAR[i & 0x3f];
+ ostream.write(out, 0, 4);
+ rindex += 3;
+ rest -= 3;
+ }
+ if (rest == 1) {
+ int i = data[rindex] & 0xff;
+ out[0] = (byte) S_BASE64CHAR[i >> 2];
+ out[1] = (byte) S_BASE64CHAR[(i << 4) & 0x3f];
+ out[2] = (byte) S_BASE64PAD;
+ out[3] = (byte) S_BASE64PAD;
+ ostream.write(out, 0, 4);
+ } else if (rest == 2) {
+ int i = ((data[rindex] & 0xff) << 8) + (data[rindex + 1] & 0xff);
+ out[0] = (byte) S_BASE64CHAR[i >> 10];
+ out[1] = (byte) S_BASE64CHAR[(i >> 4) & 0x3f];
+ out[2] = (byte) S_BASE64CHAR[(i << 2) & 0x3f];
+ out[3] = (byte) S_BASE64PAD;
+ ostream.write(out, 0, 4);
+ }
+ }
+
+ /**
+ * Outputs base64 representation of the specified byte array to a character
+ * stream.
+ */
+ public static void encode(byte[] data, int off, int len, Writer writer)
+ throws IOException {
+ if (len <= 0)
+ return;
+ char[] out = new char[4];
+ int rindex = off;
+ int rest = len - off;
+ int output = 0;
+ while (rest >= 3) {
+ int i = ((data[rindex] & 0xff) << 16)
+ + ((data[rindex + 1] & 0xff) << 8)
+ + (data[rindex + 2] & 0xff);
+ out[0] = S_BASE64CHAR[i >> 18];
+ out[1] = S_BASE64CHAR[(i >> 12) & 0x3f];
+ out[2] = S_BASE64CHAR[(i >> 6) & 0x3f];
+ out[3] = S_BASE64CHAR[i & 0x3f];
+ writer.write(out, 0, 4);
+ rindex += 3;
+ rest -= 3;
+ output += 4;
+ if (output % 76 == 0)
+ writer.write("\n");
+ }
+ if (rest == 1) {
+ int i = data[rindex] & 0xff;
+ out[0] = S_BASE64CHAR[i >> 2];
+ out[1] = S_BASE64CHAR[(i << 4) & 0x3f];
+ out[2] = S_BASE64PAD;
+ out[3] = S_BASE64PAD;
+ writer.write(out, 0, 4);
+ } else if (rest == 2) {
+ int i = ((data[rindex] & 0xff) << 8) + (data[rindex + 1] & 0xff);
+ out[0] = S_BASE64CHAR[i >> 10];
+ out[1] = S_BASE64CHAR[(i >> 4) & 0x3f];
+ out[2] = S_BASE64CHAR[(i << 2) & 0x3f];
+ out[3] = S_BASE64PAD;
+ writer.write(out, 0, 4);
+ }
+ }
+}
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