/*
* This file is part of AirReceiver.
*
* AirReceiver is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
* AirReceiver is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with AirReceiver. If not, see <http://www.gnu.org/licenses/>.
*/
package org.dyndns.jkiddo.raop.server.airreceiver;
import java.io.IOException;
public final class Base64
{
private Base64() throws InstantiationException {
throw new InstantiationException("This class is not created for instantiation");
}
/**
* Decodes Base64 data that is correctly padded with "="
*
* @param str
* base64 data
* @return bytes
* @throws IOException
* if the data is invalid
*/
public static byte[] decodePadded(final String str) throws IOException
{
return net.iharder.Base64.decode(str);
}
/**
* Decodes Base64 data that is not padded with "="
*
* @param str
* base64 data
* @return bytes
* @throws IOException
* if the data is invalid
*/
public static byte[] decodeUnpadded(String base64) throws IOException
{
while(base64.length() % 4 != 0)
base64 = base64.concat("=");
return net.iharder.Base64.decode(base64);
}
/**
* Encodes data to Base64 and padds with "="
*
* @param data
* data to encode
* @return base64 encoded string
*/
public static String encodePadded(final byte[] data)
{
return net.iharder.Base64.encodeBytes(data);
}
/**
* Encodes data to Base64 but doesn't pad with "="
*
* @param data
* data to encode
* @return base64 encoded string
*/
public static String encodeUnpadded(final byte[] data)
{
String str = net.iharder.Base64.encodeBytes(data);
final int pad = str.indexOf('=');
if(pad >= 0)
str = str.substring(0, pad);
return str;
}
}