org.apache.cxf.rs.security.oauth2.utils.Base64UrlUtility Maven / Gradle / Ivy
/**
* 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.cxf.rs.security.oauth2.utils;
/**
* Base64 URL Encoding/Decoding utility.
*
* Character 62 ('+') is '-', Character 63 ('/') is '_';
* Padding characters are dropped after the encoding.
*
*/
import java.io.UnsupportedEncodingException;
import java.util.logging.Logger;
import org.apache.cxf.common.i18n.Message;
import org.apache.cxf.common.logging.LogUtils;
import org.apache.cxf.common.util.Base64Exception;
import org.apache.cxf.common.util.Base64Utility;
public final class Base64UrlUtility {
private static final Logger LOG = LogUtils.getL7dLogger(Base64UrlUtility.class);
private Base64UrlUtility() {
//utility class, never constructed
}
public static byte[] decode(String encoded) throws Base64Exception {
encoded = encoded.replace("-", "+").replace('_', '/');
switch (encoded.length() % 4) {
case 0:
break;
case 2:
encoded += "==";
break;
case 3:
encoded += "=";
break;
default:
throw new Base64Exception(new Message("BASE64_RUNTIME_EXCEPTION", LOG));
}
return Base64Utility.decode(encoded);
}
public static String encode(String str) {
try {
return encode(str.getBytes("UTF-8"));
} catch (UnsupportedEncodingException ex) {
throw new RuntimeException(ex);
}
}
public static String encode(byte[] id) {
return encodeChunk(id, 0, id.length);
}
public static String encodeChunk(byte[] id, int offset, int length) {
String encoded = new String(Base64Utility.encodeChunk(id, offset, length));
return encoded.replace("+", "-").replace('/', '_').replace("=", "");
}
}