org.apache.cxf.rs.security.oauth2.utils.MD5SequenceGenerator 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;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import org.apache.cxf.rs.security.oauth2.provider.OAuthServiceException;
/**
* The utility MD5 sequence generator which can be used for generating
* random values
*/
public class MD5SequenceGenerator {
public String generate(byte[] input) throws OAuthServiceException {
if (input == null) {
throw new OAuthServiceException("You have to pass input to Token Generator");
}
try {
MessageDigest algorithm = MessageDigest.getInstance("MD5");
algorithm.reset();
algorithm.update(input);
byte[] messageDigest = algorithm.digest();
StringBuffer hexString = new StringBuffer();
for (int i = 0; i < messageDigest.length; i++) {
hexString.append(Integer.toHexString(0xFF & messageDigest[i]));
}
return hexString.toString();
} catch (NoSuchAlgorithmException e) {
throw new OAuthServiceException("server_error", e);
}
}
}