org.lightjason.agentspeak.action.buildin.crypto.EAlgorithm.java Source code

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Here is the source code for org.lightjason.agentspeak.action.buildin.crypto.EAlgorithm.java

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/*
 * @cond LICENSE
 * ######################################################################################
 * # LGPL License                                                                       #
 * #                                                                                    #
 * # This file is part of the LightJason AgentSpeak(L++)                                #
 * # Copyright (c) 2015-16, LightJason (info@lightjason.org)                            #
 * # This program is free software: you can redistribute it and/or modify               #
 * # it under the terms of the GNU Lesser General Public License as                     #
 * # published by the Free Software Foundation, either version 3 of the                 #
 * # License, or (at your option) any later version.                                    #
 * #                                                                                    #
 * # This program is distributed in the hope that it will be useful,                    #
 * # but WITHOUT ANY WARRANTY; without even the implied warranty of                     #
 * # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the                      #
 * # GNU Lesser General Public License for more details.                                #
 * #                                                                                    #
 * # You should have received a copy of the GNU Lesser General Public License           #
 * # along with this program. If not, see http://www.gnu.org/licenses/                  #
 * ######################################################################################
 * @endcond
 */

package org.lightjason.agentspeak.action.buildin.crypto;

import org.apache.commons.lang3.tuple.ImmutablePair;
import org.apache.commons.lang3.tuple.Pair;
import org.lightjason.agentspeak.common.CCommon;
import org.lightjason.agentspeak.error.CIllegalStateException;

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.NoSuchAlgorithmException;
import java.util.Locale;

/**
 * enum with encrypting types
 */
public enum EAlgorithm {
    AES("AES/ECB/PKCS5Padding", "AES"), DES("DES/ECB/PKCS5Padding", "DES"), RSA("RSA/ECB/PKCS1Padding", "RSA");

    /**
     * chipher name
     */
    private final String m_cipher;
    /**
     * key name
     */
    private final String m_key;

    /**
     * ctor
     *
     * @param p_cipher chipher name
     * @param p_key name of the key
     */
    EAlgorithm(final String p_cipher, final String p_key) {
        m_cipher = p_cipher;
        m_key = p_key;
    }

    /**
     * generates a key
     *
     * @return key pair object (public key / private key or null)
     *
     * @throws NoSuchAlgorithmException on algorithm error
     */
    public final Pair<Key, Key> generateKey() throws NoSuchAlgorithmException {
        switch (this) {
        case AES:
        case DES:
            return new ImmutablePair<>(KeyGenerator.getInstance(m_key).generateKey(), null);

        case RSA:
            final KeyPair l_key = KeyPairGenerator.getInstance(m_key).generateKeyPair();
            return new ImmutablePair<>(l_key.getPublic(), l_key.getPrivate());

        default:
            throw new CIllegalStateException(CCommon.languagestring(this, "unknown", this));
        }
    }

    /**
     * returns encrypt cipher
     *
     * @param p_key key object
     * @return cipher
     *
     * @throws NoSuchPaddingException on padding error
     * @throws NoSuchAlgorithmException on algorithm error
     * @throws InvalidKeyException on key invalid
     */
    public final Cipher getEncryptCipher(final Key p_key)
            throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidKeyException {
        final Cipher l_cipher = Cipher.getInstance(m_cipher);
        l_cipher.init(Cipher.ENCRYPT_MODE, p_key);
        return l_cipher;
    }

    /**
     * * returns decrypt cipher
     *
     * @param p_key key object
     * @return cipher
     *
     * @throws NoSuchPaddingException on padding error
     * @throws NoSuchAlgorithmException on algorithm error
     * @throws InvalidKeyException on key invalid
     */
    public final Cipher getDecryptCipher(final Key p_key)
            throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidKeyException {
        final Cipher l_cipher = Cipher.getInstance(m_cipher);
        l_cipher.init(Cipher.DECRYPT_MODE, p_key);
        return l_cipher;
    }

    /**
     * additional factory
     *
     * @param p_value string value
     * @return enum
     */
    public static EAlgorithm from(final String p_value) {
        return EAlgorithm.valueOf(p_value.trim().toUpperCase(Locale.ROOT));
    }

}