Changed base64 implementation. SMACK-135

git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/trunk@3828 b35dd754-fafc-0310-a699-88a17e54d16e

source/org/jivesoftware/smack/util/StringUtils.java

@@ -147,7 +147,6 @@ public class StringUtils {
         for (; i < len; i++) {
             ch = input[i];
             if (ch > '>') {
-                continue;
             }
             else if (ch == '<') {
                 if (i > last) {
@@ -256,20 +255,6 @@ public class StringUtils {
         return hex.toString();
     }
 
-    //*********************************************************************
-    //* Base64 - a simple base64 encoder and decoder.
-    //*
-    //*     Copyright (c) 1999, Bob Withers - bwit@pobox.com
-    //*
-    //* This code may be freely used for any purpose, either personal
-    //* or commercial, provided the authors copyright notice remains
-    //* intact.
-    //*********************************************************************
-
-    private static final int fillchar = '=';
-    private static final String cvt = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
-                                    + "0123456789+/";
-
     /**
      * Encodes a String as a base64 String.
      *
@@ -294,38 +279,31 @@ public class StringUtils {
      * @return a base64 encode String.
      */
     public static String encodeBase64(byte[] data) {
-        int c;
+        return encodeBase64(data, false);
-        int len = data.length;
-        StringBuffer ret = new StringBuffer(((len / 3) + 1) * 4);
-        for (int i = 0; i < len; ++i) {
-            c = (data[i] >> 2) & 0x3f;
-            ret.append(cvt.charAt(c));
-            c = (data[i] << 4) & 0x3f;
-            if (++i < len)
-                c |= (data[i] >> 4) & 0x0f;
-
-            ret.append(cvt.charAt(c));
-            if (i < len) {
-                c = (data[i] << 2) & 0x3f;
-                if (++i < len)
-                    c |= (data[i] >> 6) & 0x03;
-
-                ret.append(cvt.charAt(c));
-            }
-            else {
-                ++i;
-                ret.append((char) fillchar);
     }
 
-            if (i < len) {
+    /**
-                c = data[i] & 0x3f;
+     * Encodes a byte array into a bse64 String.
-                ret.append(cvt.charAt(c));
+     *
+     * @param data The byte arry to encode.
+     * @param lineBreaks True if the encoding should contain line breaks and false if it should not.
+     * @return A base64 encoded String.
+     */
+    public static String encodeBase64(byte[] data, boolean lineBreaks) {
+        return encodeBase64(data, 0, data.length, lineBreaks);
     }
-            else {
+
-                ret.append((char) fillchar);
+    /**
-            }
+     * Encodes a byte array into a bse64 String.
-        }
+     *
-        return ret.toString();
+     * @param data The byte arry to encode.
+     * @param offset the offset of the bytearray to begin encoding at.
+     * @param len the length of bytes to encode.
+     * @param lineBreaks True if the encoding should contain line breaks and false if it should not.
+     * @return A base64 encoded String.
+     */
+    public static String encodeBase64(byte[] data, int offset, int len, boolean lineBreaks) {
+        return Base64.encodeBytes(data, offset, len, (lineBreaks ?  Base64.NO_OPTIONS : Base64.DONT_BREAK_LINES));
     }
 
     /**
@@ -335,54 +313,7 @@ public class StringUtils {
      * @return the decoded String.
      */
     public static byte[] decodeBase64(String data) {
-        byte [] bytes = null;
+        return Base64.decode(data);
-        try {
-            bytes = data.getBytes("ISO-8859-1");
-            return decodeBase64(bytes).getBytes("ISO-8859-1");
-        }
-        catch (UnsupportedEncodingException uee) {
-            uee.printStackTrace();
-        }
-        return new byte[] { };
-    }
-
-    /**
-     * Decodes a base64 aray of bytes.
-     *
-     * @param data a base64 encode byte array to decode.
-     * @return the decoded String.
-     */
-    private static String decodeBase64(byte[] data) {
-        int c, c1;
-        int len = data.length;
-        StringBuffer ret = new StringBuffer((len * 3) / 4);
-        for (int i = 0; i < len; ++i) {
-            c = cvt.indexOf(data[i]);
-            ++i;
-            c1 = cvt.indexOf(data[i]);
-            c = ((c << 2) | ((c1 >> 4) & 0x3));
-            ret.append((char) c);
-            if (++i < len) {
-                c = data[i];
-                if (fillchar == c)
-                    break;
-
-                c = cvt.indexOf(c);
-                c1 = ((c1 << 4) & 0xf0) | ((c >> 2) & 0xf);
-                ret.append((char) c1);
-            }
-
-            if (++i < len) {
-                c1 = data[i];
-                if (fillchar == c1)
-                    break;
-
-                c1 = cvt.indexOf(c1);
-                c = ((c << 6) & 0xc0) | c1;
-                ret.append((char) c);
-            }
-        }
-        return ret.toString();
     }
 
     /**
@@ -414,7 +345,7 @@ public class StringUtils {
      * @param length the desired length of the random String to return.
      * @return a random String of numbers and letters of the specified length.
      */
-    public static final String randomString(int length) {
+    public static String randomString(int length) {
         if (length < 1) {
             return null;
         }

source/org/jivesoftware/smackx/filetransfer/IBBTransferNegotiator.java

@@ -23,6 +23,7 @@ import org.jivesoftware.smack.PacketCollector;
 import org.jivesoftware.smack.PacketListener;
 import org.jivesoftware.smack.XMPPConnection;
 import org.jivesoftware.smack.XMPPException;
+import org.jivesoftware.smack.util.StringUtils;
 import org.jivesoftware.smack.filter.*;
 import org.jivesoftware.smack.packet.IQ;
 import org.jivesoftware.smack.packet.Message;
@@ -156,8 +157,6 @@ public class IBBTransferNegotiator extends StreamNegotiator {
 
         final String userID;
 
-        private final int options = Base64.DONT_BREAK_LINES;
-
         final private IQ closePacket;
 
         private String messageID;
@@ -222,7 +221,7 @@ public class IBBTransferNegotiator extends StreamNegotiator {
             IBBExtensions.Data ext = new IBBExtensions.Data(sid);
             template.addExtension(ext);
 
-            String enc = Base64.encodeBytes(buffer, offset, len, options);
+            String enc = StringUtils.encodeBase64(buffer, offset, len, false);
 
             ext.setData(enc);
             ext.setSeq(seq);
@@ -346,7 +345,7 @@ public class IBBTransferNegotiator extends StreamNegotiator {
                     IBBExtensions.NAMESPACE);
 
             checkSequence(mess, (int) data.getSeq());
-            buffer = Base64.decode(data.getData());
+            buffer = StringUtils.decodeBase64(data.getData());
             bufferPointer = 0;
             return true;
         }