content: /**
   * event-bus - An event bus framework for event driven programming
   * Copyright (C) 2016  Adrian Cristian Ionescu - https://github.com/acionescu
   *
   * 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 net.segoia.event.eventbus.peers.security;
  
  import javax.crypto.Cipher;
  import javax.crypto.SecretKey;
  import javax.crypto.spec.IvParameterSpec;
  import javax.crypto.spec.SecretKeySpec;
  
  import net.segoia.event.eventbus.peers.vo.auth.id.SharedNodeIdentity;
  import net.segoia.event.eventbus.peers.vo.comm.EncryptSymmetricOperationDef;
  
  public class DefaultSessionManager implements SessionManager {
      private SecretKey secretKey;
      private byte[] iv;
  
      public DefaultSessionManager(SharedNodeIdentity sharedIdentity) {
  	super();
  	this.secretKey = new SecretKeySpec(sharedIdentity.getKeyBytes(),
  		sharedIdentity.getType().getKeyDef().getAlgorithm());
  	this.iv = sharedIdentity.getIv();
      }
  
      @Override
      public EncryptOperationWorker buildEncryptWorker(EncryptSymmetricOperationDef opDef) throws Exception {
  	Cipher cipher = Cipher.getInstance(opDef.getTransformation());
  	cipher.init(Cipher.ENCRYPT_MODE, secretKey, new IvParameterSpec(iv));
  	return new CipherEncryptOperationWorker(cipher);
      }
  
      @Override
      public DecryptOperationWorker buildDecryptWorker(EncryptSymmetricOperationDef opDef) throws Exception {
  	Cipher cipher = Cipher.getInstance(opDef.getTransformation());
  	cipher.init(Cipher.DECRYPT_MODE, secretKey, new IvParameterSpec(iv));
  	return new CipherDecryptOperationWorker(cipher);
      }
  
      @Override
      public String getIdentityType() {
  	return secretKey.getAlgorithm();
      }
  
  }
  