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/*
 * Copyright 2012 AMG.lab, a Bull Group Company
 * 
 * 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.xlcloud.encryption;

/**
 * Encryption service interface which is used for message encryption. 
 * @author Konrad Król, AMG.net
 */
public interface EncryptionService {
    /**
     * Encrypts given message using specified encryption algorithm.
     * @param message message to be encrypted
     * @return encrypted message
     * @throws EncryptionException if decryption failed - invalid encryption algorithm setup
     */
    public String encrypt(String message) throws EncryptionException;
    
    /**
     * Decrypts encrypted message using specified encryption algorithm.
     * @param encryptedMessage message to be decrypted.
     * @return decrypted message.
     * @throws EncryptionException if decryption failed - invalid encryption algorithm setup 
     */
    public String decrypt(String encryptedMessage) throws EncryptionException;
}