| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 1999-2001 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, if |
| * any, must include the following acknowlegement: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowlegement may appear in the software itself, |
| * if and wherever such third-party acknowlegements normally appear. |
| * |
| * 4. The names "The Jakarta Project", "Ant", and "Apache Software |
| * Foundation" must not be used to endorse or promote products derived |
| * from this software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache" |
| * nor may "Apache" appear in their names without prior written |
| * permission of the Apache Group. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| |
| |
| package org.apache.tools.ant.taskdefs.optional.http; |
| |
| /** |
| * This code handles Base64 encoding for basic authentication |
| * and the like |
| * |
| * @author matth@pobox.com Matt Humphrey |
| * @author steve_l@iseran.com Steve Loughran |
| * @created 02 April 2001 |
| */ |
| class Base64Encode { |
| |
| /** |
| * the encode alphabet |
| */ |
| private char[] alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=".toCharArray(); |
| |
| |
| /** |
| * Encode a block of binary data as base64 as specified in RFC1521. |
| * |
| * @param data the binary data to encode. |
| * @return An array of characters that represent the data encoded |
| * as Base64 |
| */ |
| public char[] encodeBase64(byte[] data) { |
| char[] out = new char[((data.length + 2) / 3) * 4]; |
| |
| // |
| // 3 bytes encode to 4 chars. Output is always an even |
| // multiple of 4 characters. |
| // |
| for (int i = 0, index = 0; i < data.length; i += 3, index += 4) { |
| boolean quad = false; |
| boolean triple = false; |
| //convert to unsigned byte |
| int val = (0xFF & (int) data[i]); |
| val <<= 8; |
| if ((i + 1) < data.length) { |
| val |= (0xFF & (int) data[i + 1]); |
| triple = true; |
| } |
| val <<= 8; |
| if ((i + 2) < data.length) { |
| val |= (0xFF & (int) data[i + 2]); |
| quad = true; |
| } |
| out[index + 3] = alphabet[(quad ? (val & 0x3F) : 64)]; |
| val >>= 6; |
| out[index + 2] = alphabet[(triple ? (val & 0x3F) : 64)]; |
| val >>= 6; |
| out[index + 1] = alphabet[val & 0x3F]; |
| val >>= 6; |
| out[index + 0] = alphabet[val & 0x3F]; |
| } |
| return out; |
| } |
| |
| } |
| |