Encryption and decryption in java using private key

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

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.PBEParameterSpec;

import org.springframework.stereotype.Component;

/**
 * @author lovebharti
 */
@Component
public class CryptoUtil {

    private Cipher cipher;
    private Cipher decipher;
    private int iterationCount = 19;
   
    private String secretKeyFactory="PBEWithMD5AndDES";

    private byte[] salt = {
        (byte) 0xA9, (byte) 0x9B, (byte) 0xC8, (byte) 0x32,
        (byte) 0x56, (byte) 0x35, (byte) 0xE3, (byte) 0x03
    };

    /**
     * @param secretKey Key used to encrypt data
     * @param plainText Text input to be encrypted
     * @return Returns encrypted text
     */
    public String encrypt(String secretKey, String plainText)
            throws NoSuchAlgorithmException,
            InvalidKeySpecException,
            NoSuchPaddingException,
            InvalidKeyException,
            InvalidAlgorithmParameterException,
            UnsupportedEncodingException,
            IllegalBlockSizeException,
            BadPaddingException{
        //Key generation for enc and desc
        KeySpec keySpec = new PBEKeySpec(secretKey.toCharArray(), salt, iterationCount);
        SecretKey key = SecretKeyFactory.getInstance(secretKeyFactory).generateSecret(keySpec);      
         // Prepare the parameter to the ciphers
        AlgorithmParameterSpec paramSpec = new PBEParameterSpec(salt, iterationCount);

        //Enc process
        cipher = Cipher.getInstance(key.getAlgorithm());
        cipher.init(Cipher.ENCRYPT_MODE, key, paramSpec);  
        String charSet="UTF-8";      
        byte[] in = plainText.getBytes(charSet);
        byte[] out = cipher.doFinal(in);
        String encStr=new sun.misc.BASE64Encoder().encode(out);
        return encStr;
    }
   
   
    /**    
     * @param secretKey Key used to decrypt data
     * @param encryptedText encrypted text input to decrypt
     * @return Returns plain text after decryption
     */
    public String decrypt(String secretKey, String encryptedText)
     throws NoSuchAlgorithmException,
            InvalidKeySpecException,
            NoSuchPaddingException,
            InvalidKeyException,
            InvalidAlgorithmParameterException,
            UnsupportedEncodingException,
            IllegalBlockSizeException,
            BadPaddingException,
            IOException{
         //Key generation for enc and desc
        KeySpec keySpec = new PBEKeySpec(secretKey.toCharArray(), salt, iterationCount);
        SecretKey key = SecretKeyFactory.getInstance(secretKeyFactory).generateSecret(keySpec);      
         // Prepare the parameter to the ciphers
        AlgorithmParameterSpec paramSpec = new PBEParameterSpec(salt, iterationCount);
        //Decryption process; same key will be used for decr
        decipher=Cipher.getInstance(key.getAlgorithm());
        decipher.init(Cipher.DECRYPT_MODE, key,paramSpec);
        byte[] enc = new sun.misc.BASE64Decoder().decodeBuffer(encryptedText);
        byte[] utf8 = decipher.doFinal(enc);
        String charSet="UTF-8";    
        String plainStr = new String(utf8, charSet);
        return plainStr;
    }  
}

Adding virtual host in apache

1. Go to : /etc/apache2/sites-available
2. Add/create cg.xyz.com.conf file using sudo

 <VirtualHost *:80>
    # The ServerName directive sets the request scheme, hostname and port that
    # the server uses to identify itself. This is used when creating
    # redirection URLs. In the context of virtual hosts, the ServerName
    # specifies what hostname must appear in the request's Host: header to
    # match this virtual host. For the default virtual host (this file) this
    # value is not decisive as it is used as a last resort host regardless.
    # However, you must set it for any further virtual host explicitly.
    #ServerName www.example.com

    ServerAdmin webmaster@cg.yatra.com
    DocumentRoot /var/www

    # Available loglevels: trace8, ..., trace1, debug, info, notice, warn,
    # error, crit, alert, emerg.
    # It is also possible to configure the loglevel for particular
    # modules, e.g.
    #LogLevel info ssl:warn

    ErrorLog ${APACHE_LOG_DIR}/error.log
    CustomLog ${APACHE_LOG_DIR}/access.log combined

    # For most configuration files from conf-available/, which are
    # enabled or disabled at a global level, it is possible to
    # include a line for only one particular virtual host. For example the
    # following line enables the CGI configuration for this host only
    # after it has been globally disabled with "a2disconf".
    #Include conf-available/serve-cgi-bin.conf
</VirtualHost>

# vim: syntax=apache ts=4 sw=4 sts=4 sr noet

3. now make a link of above created file in /etc/apache2/sites-enabled of same name

4. Activate the host now : sudo a2ensite  cg.xyz.com

5. restart apache service
sudo service apache2 restart