/****************************************************************
* Licensed to the Apache Software Foundation (ASF) under one *
* or more contributor license agreements. See the NOTICE file *
* distributed with this work for additional information *
* regarding copyright ownership. The ASF licenses this file *
* to you 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.james.util;
import javax.mail.internet.MimeUtility;
import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStreamReader;
/**
* Simple Base64 string decoding function
*
* @version This is $Revision: 494012 $
*/
public class Base64 {
public static BufferedReader decode(String b64string) throws Exception {
return new BufferedReader(
new InputStreamReader(
MimeUtility.decode(
new ByteArrayInputStream(
b64string.getBytes()), "base64")));
}
public static String decodeAsString(String b64string) throws Exception {
if (b64string == null) {
return b64string;
}
String returnString = decode(b64string).readLine();
if (returnString == null) {
return returnString;
}
return returnString.trim();
}
public static ByteArrayOutputStream encode(String plaintext)
throws Exception {
ByteArrayOutputStream out = new ByteArrayOutputStream();
byte[] in = plaintext.getBytes();
ByteArrayOutputStream inStream = new ByteArrayOutputStream();
inStream.write(in, 0, in.length);
// pad
if ((in.length % 3 ) == 1){
inStream.write(0);
inStream.write(0);
} else if((in.length % 3 ) == 2){
inStream.write(0);
}
inStream.writeTo( MimeUtility.encode(out, "base64") );
return out;
}
public static String encodeAsString(String plaintext) throws Exception {
return encode(plaintext).toString();
}
}
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