content: /*
   * Copyright (c) 2013 3 Round Stones Inc., Some Rights Reserved
   *
   * Licensed 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.callimachusproject.behaviours;
  
  import java.io.IOException;
  
  import org.apache.commons.codec.digest.DigestUtils;
  import org.callimachusproject.concepts.User;
  import org.callimachusproject.traits.CalliObject;
  import org.openrdf.OpenRDFException;
  import org.openrdf.http.object.exceptions.BadRequest;
  
  public abstract class UserSupport implements User, CalliObject {
  
  	public String getSecretToken(String nonce) throws OpenRDFException,
  			IOException {
  		if (nonce == null || nonce.length() == 0)
  			throw new BadRequest("Missing nonce");
  		String uri = this.getResource().stringValue();
  		String hash = DigestUtils.md5Hex(uri);
  		String secret = this.getRealm().getOriginSecret();
  		return DigestUtils.md5Hex(hash + ":" + nonce + ":" + secret);
  	}
  }
  