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PicketLink JSON provides an API and implementation for JSON based on related specifications such as JWT, JWS and JWE.
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/*
* JBoss, Home of Professional Open Source.
* Copyright 2012, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.picketlink.json.util;
import static org.picketlink.json.JsonMessages.MESSAGES;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
public class Base64Util {
/**
* Base64 Encode without breaking lines.
*
* @param str the string to be encoded
* @return the string
*/
public static String b64Encode(String str) {
try {
return b64Encode(str.getBytes("UTF-8"));
} catch (UnsupportedEncodingException e) {
throw MESSAGES.failEncodeToken(e);
}
}
/**
* Base64 Encode the byte array without breaking lines.
*
* @param bytes the bytes
* @return the string
*/
public static String b64Encode(byte[] bytes) {
String s = Base64.encodeBytes(bytes);
s = s.split("=")[0]; // Remove any trailing '='s
s = s.replace('+', '-'); // 62nd char of encoding
s = s.replace('/', '_'); // 63rd char of encoding
return s;
}
/**
* Base64 decode the string.
*
* @param s the string to be decoded
* @return the decoded byte[] array
*/
public static byte[] b64Decode(String s) {
s = s.replace('-', '+'); // 62nd char of encoding
s = s.replace('_', '/'); // 63rd char of encoding
switch (s.length() % 4) { // Pad with trailing '='s
case 0:
break; // No pad chars in this case
case 2:
s += "==";
break; // Two pad chars
case 3:
s += "=";
break; // One pad char
default:
throw new RuntimeException("Illegal base64url string!");
}
try {
return Base64.decode(s);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}
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