de.alpharogroup.crypto.aes.HexNewEncryptor.java Source code

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Here is the source code for de.alpharogroup.crypto.aes.HexNewEncryptor.java

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/**
 * Copyright (C) 2007 Asterios Raptis
 *
 * 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 de.alpharogroup.crypto.aes;

import java.io.UnsupportedEncodingException;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.spec.InvalidKeySpecException;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.SecretKeySpec;

import org.apache.commons.codec.binary.Hex;

import de.alpharogroup.check.Check;
import de.alpharogroup.crypto.algorithm.Algorithm;
import de.alpharogroup.crypto.core.BaseEncryptor;
import lombok.Getter;
import lombok.Setter;

/**
 * Instantiates a new hex encryptor.
 */
public class HexNewEncryptor extends BaseEncryptor<String, String> {

    /** The Constant serialVersionUID. */
    private static final long serialVersionUID = 1L;

    /**
     * The algorithm.
     */
    @Getter
    @Setter
    private Algorithm algorithm;

    /**
     * Default constructor.
     *
     * @param privateKeykey
     *            The private key.
     * @throws InvalidAlgorithmParameterException
     * @throws NoSuchPaddingException
     * @throws InvalidKeySpecException
     * @throws NoSuchAlgorithmException
     * @throws InvalidKeyException
     */
    public HexNewEncryptor(final String privateKey)
            throws InvalidKeyException, NoSuchAlgorithmException, InvalidKeySpecException, NoSuchPaddingException,
            InvalidAlgorithmParameterException, UnsupportedEncodingException {
        this(privateKey, Algorithm.AES);
    }

    /**
     * Default constructor.
     *
     * @param privateKey
     *            The private key.
     * @param algorithm
     *            the algorithm
     * @throws InvalidAlgorithmParameterException
     * @throws NoSuchPaddingException
     * @throws InvalidKeySpecException
     * @throws NoSuchAlgorithmException
     * @throws InvalidKeyException
     */
    public HexNewEncryptor(final String privateKey, final Algorithm algorithm)
            throws InvalidKeyException, NoSuchAlgorithmException, InvalidKeySpecException, NoSuchPaddingException,
            InvalidAlgorithmParameterException, UnsupportedEncodingException {
        super(privateKey);
        Check.get().notNull(algorithm, "algorithm");
        this.algorithm = algorithm;
    }

    /**
     * Encrypt the given String.
     *
     * @param string
     *            The String to encrypt.
     * @return The encrypted String.
     * @throws InvalidKeyException
     *             the invalid key exception is thrown if initialization of the cypher object fails.
     * @throws UnsupportedEncodingException
     *             is thrown by get the byte array of the private key String object fails.
     * @throws NoSuchAlgorithmException
     *             is thrown if instantiation of the cypher object fails.
     * @throws NoSuchPaddingException
     *             is thrown if instantiation of the cypher object fails.
     * @throws IllegalBlockSizeException
     *             is thrown if {@link Cipher#doFinal(byte[])} fails.
     * @throws BadPaddingException
     *             is thrown if {@link Cipher#doFinal(byte[])} fails.
     * @see de.alpharogroup.crypto.interfaces.Encryptor#encrypt(java.lang.String)
     */
    @Override
    public String encrypt(final String string) throws InvalidKeyException, UnsupportedEncodingException,
            NoSuchAlgorithmException, NoSuchPaddingException, IllegalBlockSizeException, BadPaddingException {
        final byte[] utf8 = string.getBytes("UTF-8");
        final byte[] encrypt = this.cipher.doFinal(utf8);
        final char[] original = Hex.encodeHex(encrypt, false);
        return new String(original);
    }

    @Override
    protected String newAlgorithm() {
        algorithm = Algorithm.AES;
        return algorithm.getAlgorithm();
    }

    @Override
    protected Cipher newCipher(final String privateKey, final String algorithm, final byte[] salt,
            final int iterationCount, final int operationMode)
            throws NoSuchAlgorithmException, InvalidKeySpecException, NoSuchPaddingException, InvalidKeyException,
            InvalidAlgorithmParameterException, UnsupportedEncodingException {

        final SecretKeySpec skeySpec = new SecretKeySpec(privateKey.getBytes("UTF-8"),
                this.algorithm.getAlgorithm());
        this.cipher = Cipher.getInstance(this.algorithm.getAlgorithm());
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
        return cipher;
    }

}