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package test;

/**
 * Imports
 */
import java.security.*;
import java.security.interfaces.*;
import java.security.spec.*;
import javax.crypto.*;

import java.math.BigInteger;

/**
 * The main class
 *
 * @author anders
 */
public class Main
{
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args)
    {
        /**
         * Handle exceptions
         */
        try
        {
            /**
             * Create the key generator
             */
            KeyFactory keyFac = KeyFactory.getInstance("RSA");
            System.out.println("tyuiop");

            /**
             * Create key specs
             */
            RSAPrivateKeySpec specPrivate = new RSAPrivateKeySpec(
                        new BigInteger("6768977777777734985789347897493477838973493098765432345678987654345678987654567847934797987593797349587349474939989896897345", 32),
                        new BigInteger("6768977777777734985789347897493477838973493098765432345678987654345678987654567847934797987593797349587349474939989896897345", 32)
                            );
            RSAPublicKeySpec specPublic = new RSAPublicKeySpec(
                        new BigInteger("6768977777777734985789347897493477838973493098765432345678987654345678987654567847934797987593797349587349474939989896897345", 32),
                        new BigInteger("6768977777777734985789347897493477838973493098765432345678987654345678987654567847934797987593797349587349474939989896897345", 32)
                            );

            /**
             * Generate keys
             */
            RSAPrivateKey privateKey = (RSAPrivateKey) keyFac.generatePrivate( specPrivate );
            RSAPublicKey publicKey = (RSAPublicKey) keyFac.generatePublic( specPublic );

            /**
             * Create Cipher object, and set it to encrypt
             */
            Cipher cipher = Cipher.getInstance("RSA");
            cipher.init(Cipher.ENCRYPT_MODE, privateKey);

            /**
             * Declare text to encrypt
             */
            String txt = "text";

            /**
             * Encrypt data
             */
            byte[] bytes = txt.getBytes();
            String encTxt = new String( cipher.doFinal( bytes ) );

            /**
             * Output encrypted data
             */
            System.out.println( encTxt );

            /**
             * Set the cipher to decrypt data
             */
            cipher.init(Cipher.DECRYPT_MODE, publicKey);

            /**
             * Decrypt data
             */
            bytes = encTxt.getBytes();
            String decTxt = new String( cipher.doFinal( bytes ) );

            /**
             * Output decrypted data, and then the data that once was encrypted
             */
            System.out.println( decTxt );
            System.out.println( txt );
        }
        catch (Exception e)
        {
            /**
             * Output exception data
             */
            System.err.println("ERROR: " + e.toString());
        }
    }
}

/**
 * Imports
 */
import java.security.*;
import javax.crypto.*;

/**
 * The main class
 *
 * @author anders
 */
public class Main
{
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args)
    {
        /**
         * Handle exceptions
         */
        try
        {
            /**
             * Generate keys
             */
            KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA");
            KeyPair pair = keyGen.generateKeyPair();
            PrivateKey privateKey = pair.getPrivate();
            PublicKey publicKey = pair.getPublic();

            /**
             * Create Cipher object, and set it to encrypt
             */
            Cipher cipher = Cipher.getInstance("RSA");
            cipher.init(Cipher.ENCRYPT_MODE, privateKey);

            /**
             * Declare text to encrypt
             */
            String txt = "text//\\´´# # # 231";

            /**
             * Encrypt data
             */
            byte[] bytes = txt.getBytes();
            byte[] manip = cipher.doFinal( bytes );


            /**
             * Set the cipher to decrypt data
             */
            cipher.init(Cipher.DECRYPT_MODE, publicKey);
            
            /**
             * Decrypt data
             */
            manip = cipher.doFinal( manip );

            /**
             * Output decrypted data, and then the data that once was encrypted
             */
            System.out.println(new String( manip ));
        }
        catch (Exception e)
        {
            /**
             * Output exception data
             */
            System.err.println("ERROR: " + e.toString());
        }
    }
}