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The source code// $Header: /home/cvs/jakarta-jmeter/src/protocol/http/org/apache/jmeter/protocol/http/util/Base64Encoder.java,v 1.4 2004/02/12 00:29:50 sebb Exp $ /* * 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. * */ package org.apache.jmeter.protocol.http.util; /** * This class provides an implementation of Base64 encoding without relying on * the the sun.* packages. * * @version $Revision: 1.4 $ */ public final class Base64Encoder { private final static char[] pem_array = { 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 43, 47}; private final static char eq = 61; /** * Private constructor to prevent instantiation. */ private Base64Encoder() { } public final static String encode(String s) { return encode(s.getBytes()); } public final static String encode(byte[] bs) { StringBuffer out = new StringBuffer(""); int bl = bs.length; for (int i = 0; i < bl; i += 3) { out.append(encodeAtom(bs, i, (bl - i))); } return out.toString(); } public final static String encodeAtom(byte[] b, int strt, int left) { StringBuffer out = new StringBuffer(""); if (left == 1) { byte b1 = b[strt]; int k = 0; out.append(String.valueOf(pem_array[b1 >>> 2 & 63])); out.append( String.valueOf(pem_array[(b1 << 4 & 48) + (k >>> 4 & 15)])); out.append(String.valueOf(eq)); out.append(String.valueOf(eq)); return out.toString(); } if (left == 2) { byte b2 = b[strt]; byte b4 = b[strt + 1]; int l = 0; out.append(String.valueOf(pem_array[b2 >>> 2 & 63])); out.append( String.valueOf(pem_array[(b2 << 4 & 48) + (b4 >>> 4 & 15)])); out.append( String.valueOf(pem_array[(b4 << 2 & 60) + (l >>> 6 & 3)])); out.append(String.valueOf(eq)); return out.toString(); } byte b3 = b[strt]; byte b5 = b[strt + 1]; byte b6 = b[strt + 2]; out.append(String.valueOf(pem_array[b3 >>> 2 & 63])); out.append(String.valueOf(pem_array[(b3 << 4 & 48) + (b5 >>> 4 & 15)])); out.append(String.valueOf(pem_array[(b5 << 2 & 60) + (b6 >>> 6 & 3)])); out.append(String.valueOf(pem_array[b6 & 63])); return out.toString(); } } |
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