using System;

using System.Linq;

using System.Security.Cryptography;

using System.Text;

​

public class Program

{

    public static void Main()

    {

        var token = Encrypt("HelloWorld");

        Console.WriteLine(token);

        var s = Decrypt(token);

        Console.WriteLine(s);

    }

    private static string _privateKey = "<RSAKeyValue><Modulus>s6lpjspk+3o2GOK5TM7JySARhhxE5gB96e9XLSSRuWY2W9F951MfistKRzVtg0cjJTdSk5mnWAVHLfKOEqp8PszpJx9z4IaRCwQ937KJmn2/2VyjcUsCsor+fdbIHOiJpaxBlsuI9N++4MgF/jb0tOVudiUutDqqDut7rhrB/oc=</Modulus><Exponent>AQAB</Exponent><P>3J2+VWMVWcuLjjnLULe5TmSN7ts0n/TPJqe+bg9avuewu1rDsz+OBfP66/+rpYMs5+JolDceZSiOT+ACW2Neuw==</P><Q>0HogL5BnWjj9BlfpILQt8ajJnBHYrCiPaJ4npghdD5n/JYV8BNOiOP1T7u1xmvtr2U4mMObE17rZjNOTa1rQpQ==</Q><DP>jbXh2dVQlKJznUMwf0PUiy96IDC8R/cnzQu4/ddtEe2fj2lJBe3QG7DRwCA1sJZnFPhQ9svFAXOgnlwlB3D4Gw==</DP><DQ>evrP6b8BeNONTySkvUoMoDW1WH+elVAH6OsC8IqWexGY1YV8t0wwsfWegZ9IGOifojzbgpVfIPN0SgK1P+r+kQ==</DQ><InverseQ>LeEoFGI+IOY/J+9SjCPKAKduP280epOTeSKxs115gW1b9CP4glavkUcfQTzkTPe2t21kl1OrnvXEe5Wrzkk8rA==</InverseQ><D>HD0rn0sGtlROPnkcgQsbwmYs+vRki/ZV1DhPboQJ96cuMh5qeLqjAZDUev7V2MWMq6PXceW73OTvfDRcymhLoNvobE4Ekiwc87+TwzS3811mOmt5DJya9SliqU/ro+iEicjO4v3nC+HujdpDh9CVXfUAWebKnd7Vo5p6LwC9nIk=</D></RSAKeyValue>";

​

    private static string _publicKey = "<RSAKeyValue><Modulus>s6lpjspk+3o2GOK5TM7JySARhhxE5gB96e9XLSSRuWY2W9F951MfistKRzVtg0cjJTdSk5mnWAVHLfKOEqp8PszpJx9z4IaRCwQ937KJmn2/2VyjcUsCsor+fdbIHOiJpaxBlsuI9N++4MgF/jb0tOVudiUutDqqDut7rhrB/oc=</Modulus><Exponent>AQAB</Exponent></RSAKeyValue>";

​

    private static UnicodeEncoding _encoder = new UnicodeEncoding();

​

    public static string Decrypt(string data)

    {

        RSACryptoServiceProvider rSACryptoServiceProvider = new RSACryptoServiceProvider();

        string[] array = data.Split(',');

        byte[] array2 = new byte[array.Length];

        for (int i = 0; i < array.Length; i++)

        {

            array2[i] = Convert.ToByte(array[i]);

        }

        rSACryptoServiceProvider.FromXmlString(_privateKey);

        byte[] bytes = rSACryptoServiceProvider.Decrypt(array2, fOAEP: false);

        return _encoder.GetString(bytes);

    }

​

    public static string Encrypt(string data)

    {

        RSACryptoServiceProvider rSACryptoServiceProvider = new RSACryptoServiceProvider();

        rSACryptoServiceProvider.FromXmlString(_publicKey);

        byte[] bytes = _encoder.GetBytes(data);

        byte[] array = rSACryptoServiceProvider.Encrypt(bytes, fOAEP: false).ToArray();

        int num = array.Count();

        int num2 = 0;

        StringBuilder stringBuilder = new StringBuilder();

        byte[] array2 = array;

        foreach (byte value in array2)

        {

            num2++;

            stringBuilder.Append(value);

            if (num2 < num)

            {

                stringBuilder.Append(",");

            }

        }

        return stringBuilder.ToString();

    }

}