Crypto.java example

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/*
 * Jitsi, the OpenSource Java VoIP and Instant Messaging client.
 *
 * Copyright @ 2015 Atlassian Pty Ltd
 *
 * 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.java.sip.communicator.impl.credentialsstorage;

import net.java.sip.communicator.service.credentialsstorage.*;

/**
 * Allows to encrypt and decrypt text using a symmetric algorithm.
 *
 * @author Dmitri Melnikov
 */
public interface Crypto
{
    /**
     * Decrypts the cipher text and returns the result.
     *
     * @param ciphertext base64 encoded encrypted data
     * @return decrypted data
     * @throws CryptoException when the ciphertext cannot be decrypted with the
     *             key or on decryption error.
     */
    public String decrypt(String ciphertext) throws CryptoException;

    /**
     * Encrypts the plain text and returns the result.
     *
     * @param plaintext data to be encrypted
     * @return base64 encoded encrypted data
     * @throws CryptoException on encryption error
     */
    public String encrypt(String plaintext) throws CryptoException;
}