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/*
 * Copyright 2019-2020 the original author or authors.
 *
 * 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
 *
 *      https://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 com.theicenet.cryptography.cipher.symmetric.aes;

import com.theicenet.cryptography.cipher.symmetric.BlockCipherIVModeOfOperation;
import com.theicenet.cryptography.cipher.symmetric.BlockCipherModeOfOperation;
import com.theicenet.cryptography.cipher.symmetric.SymmetricIVCipherService;
import java.io.InputStream;
import java.io.OutputStream;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import org.apache.commons.lang.Validate;

/**
 * Java Cryptography Architecture (JCA) based component which encrypts and decrypts using AES
 * algorithm and an IV based block mode of operation.
 *
 * @see Advanced Encryption Standard (AES)
 * @see Block cipher mode of operation
 * @see Initialization vector (IV)
 * @see Java Cryptography Architecture (JCA)
 *
 * @implNote This implementation is unconditionally thread-safe as required by the API interface.
 *
 * @author Juan Fidalgo
 * @since 1.0.0
 */
public class JCAAESIVCipherService extends JCAAESCipherBase implements SymmetricIVCipherService {

  private final BlockCipherIVModeOfOperation blockMode;

  public JCAAESIVCipherService(BlockCipherIVModeOfOperation blockMode) {
    Validate.notNull(blockMode);
    this.blockMode = blockMode;
  }

  @Override
  public byte[] encrypt(SecretKey secretKey, byte[] iv, byte[] clearContent) {
    return process(
        Cipher.ENCRYPT_MODE,
        BlockCipherModeOfOperation.valueOf(blockMode.name()),
        secretKey,
        iv,
        clearContent);
  }

  @Override
  public byte[] decrypt(SecretKey secretKey, byte[] iv, byte[] encryptedContent) {
    return process(
        Cipher.DECRYPT_MODE,
        BlockCipherModeOfOperation.valueOf(blockMode.name()),
        secretKey,
        iv,
        encryptedContent);
  }

  /**
   * @implNote Once this method returns the input and output streams have been closed as requested
   *           in the API interface.
   */
  @Override
  public void encrypt(
      SecretKey secretKey,
      byte[] iv,
      InputStream clearContentInputStream,
      OutputStream encryptedContentOutputStream) {

    process(
        Cipher.ENCRYPT_MODE,
        BlockCipherModeOfOperation.valueOf(blockMode.name()),
        secretKey,
        iv,
        clearContentInputStream,
        encryptedContentOutputStream);
  }

  /**
   * @implNote Once this method returns the input and output streams have been closed as requested
   *           in the API interface.
   */
  @Override
  public void decrypt(
      SecretKey secretKey,
      byte[] iv,
      InputStream encryptedContentInputStream,
      OutputStream clearContentOutputStream) {

    process(
        Cipher.DECRYPT_MODE,
        BlockCipherModeOfOperation.valueOf(blockMode.name()),
        secretKey,
        iv,
        encryptedContentInputStream,
        clearContentOutputStream);
  }
}