using OpenSSL.PrivateKeyDecoder;

using OpenSSL.PublicKeyDecoder;

using System;

using System.Security.Cryptography;

using System.Text;

public class Program

{

    static void Main(string[] args)

    {

​

        String plaintext = "Hello World!";

        Console.WriteLine(plaintext);

​

        byte[] ciphertext = RSAEncrypt(plaintext, PublicKey);

        String plaintext2 = RSADecrypt(ciphertext, PrivateKey);

​

        Console.WriteLine(plaintext2);

    }

​

    public static string PublicKey

    {

        get

        {

            return @"-----BEGIN PUBLIC KEY-----

                MIGeMA0GCSqGSIb3DQEBAQUAA4GMADCBiAKBgHmkjx/uqGykst/iCgpQuOgNQFkQ

                6VdRACzZA35MSkug0VmAO9pVnx4nRfuPx76FRSE8mT3RCC4Ku0Cvn4JZw1A9TE64

                WYXb6mmwu9DZHjJs1MWiCrA5RB3yAVxyTqQc9cosZHQZ10vsayLnE1Ow1LiIsQtK

                Ii7JUcPHWppx1pk/AgMBAAE=

                -----END PUBLIC KEY-----";

        } 

    }

​

    public static string PrivateKey

    {

        get

        {

            return @"-----BEGIN RSA PRIVATE KEY-----

                MIICXAIBAAKBgHmkjx/uqGykst/iCgpQuOgNQFkQ6VdRACzZA35MSkug0VmAO9pV

                nx4nRfuPx76FRSE8mT3RCC4Ku0Cvn4JZw1A9TE64WYXb6mmwu9DZHjJs1MWiCrA5

                RB3yAVxyTqQc9cosZHQZ10vsayLnE1Ow1LiIsQtKIi7JUcPHWppx1pk/AgMBAAEC

                gYBP9WqbO958I7rszYF6DFuvNV6x7Rrk6XqrAC96qp0/n0NdiJxPRW7lfD1VQcqz

                opixY0r7xlaRJT63I3o/Tc/DFCv2ZkWmHRZa3GBNMYDvEaNuZHXw/fT88Kb6zpv4

                M6vvJz9WoAfzfqzTJ2WaU4dHkSA0MQaQxaxL2syGMU2UGQJBAOOaOmtQBfhcc3G6

                3k25IM+/MGiAF0ExSbizajrkXAwLyNYAeP/zpf2Fc+OlVjFwA4VSC8DB/05fa9Gm

                0sLRSJUCQQCI0ekGlm/tv8vuP8fiStErQeDvCxjUekiopRvq/TTtW98yQb2TVATh

                PsaTCgy6R9lx1TxSYnZx7OiwxarNxmGDAkEAzNIBGot0I/IGzeUtouIjvfC+/nuu

                8bMKNdX3ljHlB84fGT5ppWQ9D23mQYmLjIfSE0snWnr6ZywF2jB3YGx4FQJAZ1Ej

                x464bO9lfr75IN/gfercgYZ+tIy262rq3xNf8VFsBRZxopxSpwjxiL2RCOYSxIwC

                Zi/mQ3dj64EIzyTcIwJBANPg1EMcAqvi8Nz/fEeGusyGH9hqzDiLqfN7ZoExGjDo

                mcensFZGLRMQV4EhG6Ut9n1+V/5AiDlnQIw0PijU5yo=

                -----END RSA PRIVATE KEY-----";

        }

    }

​

​

    public static byte[] RSAEncrypt(string plaintext, string privateKeyText)

    {

        using (RSACryptoServiceProvider cryptoServiceProvider = new OpenSSLPublicKeyDecoder().Decode(privateKeyText))

        {

            byte[] encryptedData = cryptoServiceProvider.Encrypt(Encoding.Unicode.GetBytes(plaintext), true);

            return encryptedData;

        }

    }

​

    public static string RSADecrypt(byte[] ciphertext, string privateKeyText)

    {

​

        using (RSACryptoServiceProvider cryptoServiceProvider = new OpenSSLPrivateKeyDecoder().Decode(privateKeyText)) {

            byte[] decryptedData = cryptoServiceProvider.Decrypt(ciphertext, true);

            return Encoding.Unicode.GetString(decryptedData);

        }

​

    }

}