using System;

using System.Security.Cryptography;

using System.Text;

​

class RSACSPSample

{

​

    static void Main()

    {

​

​

        var privateKey = @"-----BEGIN RSA PRIVATE KEY-----

MIIEowIBAAKCAQEArm3NrLXJFmsdK3wu2IQgM+Wdj7P4h0m3nJhKS6t3WvSq6Eof

dde2OhShppECEo2oYwCt6E1+u9Mxv4NiI1dg+54FOgT708F2tZa8xwzv9EmRgg/m

/kerzm8LrTctEr3YhRAjJrMhyc1UVEhdTqhKd/h9GT6fy/Nu1Wi3srFgRlYGJODs

xyhPox+dm77+KlgKBFOQFxS1dfIX57hO/UjfJ0+7HGDq4+Rnv+1ZTCakP12RxlR8

sSWNExa+f2kyPgSeAC+6caNLOQkjkS4H6tlD8ROJ5LJI5rwZrtJ3Obm1jSveNH/3

PHNdXVHsXCOEOXF586ucIne0RetuY04gDWTL2wIDAQABAoIBAC/KXePIGsRNrLxR

VfR0nu4ZJ0ZMJPfMNsZs405AOH9vMbRbOqtq4r6fEHs2l77FmTEm6n8PXH3Rq3ux

X54XPrcx4HS5ENY/12qBVk+jN8tSrM9Z1AwvTt9MhYJ775mG8l/iv/7GbaeA3m4J

NadrbJvaNUxJYDbdB6zo+Au5lYsvaqOZggAteK5hk1dh6TRt7kPa+dsSF2fiD9Tq

5EYs2D6b1hYhwDSUoM0c6z0n+7ReMgnaKM69dSwtQbmY4jTDDDVoIyWDba78FrFq

QmZJMd8m1d0ex5tfpfimfYY237bk3GwUomxJK4C2g/poPT0PJCINTaKw6Q4b/hwg

Tayh2QECgYEA3qY6MtyZGNeqvjMgXhIULwgNSRw0yD0z2h4kLPoSOLCOTJ/NwkgK

cjXzgvMCudYjxbTUxwFJl8EaX3GK0zWxBwZ696r07XdzmLQ2DaLPBXl1BEeRk5+P

m4pFJ89FOdzygpZ5vDpTThfAkICA2sfSZlMslz0t6XeEc9NOsrO5XKECgYEAyI6A

x5Q54zGBR8G8q8CRYB78r7Y2oaGKSushJZcSZxz97b7mq/f/Sv/iyvhRParWlzPT

u0NNVO7zODv3ozcDyxfBTJcGmbcuAx1Icn1A0V4A4ZneM+g7eNW7eN2ITS9jkY14

l/OII6k5d+cYUPl1Fju06lIP2ub3baTV8SEauvsCgYAnUEqueG1ACbTIaNaqRZ7y

vwU5h5V6VfQ162SP3IgjImm99emrCHVvvT8GPEqa7cjbPBbmHMAV3678c1wD91MO

3oIQAUvGMnVi3U8+ESVk3hFfdBOscVw2JrAXW23pza20iUVtiw7ylxcVbNtTxjzM

fJs/CTp2IvhsSz92Jm3wgQKBgQCpN5Nw0aAGEb8CzHRkdhYzA/IwT43I0oPcsodF

MDJWzh9yeaAneRfuL/krSFlDruFgslnzptWY1ARjbjWDgOeydFikRslK6UPpXMvD

zerivG4B69GP+mIzkiKb2E8o0NMx/CvECbbUX/QdNt9Ncy1XlQkQrCy0hiw+VtYs

ncHwAQKBgHOQQaugkZE76qZs8UWrvpOgqlygIt1LcBrj0lEup9cWI/4oNRrzG+p4

V1qg1Pt/HXKNPo7zxDLHYCwot7I2jFAuOrULz071I2dctfpum3EhtDBTnz2jUB0T

K8wQX1xNxCcSH+zdKZyFTMvBlyA03wIxxH7GP5ihMNZU4MZIgw8k

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

​

​

/*  

        var publicKey = @"-----BEGIN PUBLIC KEY-----

MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEArm3NrLXJFmsdK3wu2IQg

M+Wdj7P4h0m3nJhKS6t3WvSq6Eofdde2OhShppECEo2oYwCt6E1+u9Mxv4NiI1dg

+54FOgT708F2tZa8xwzv9EmRgg/m/kerzm8LrTctEr3YhRAjJrMhyc1UVEhdTqhK

d/h9GT6fy/Nu1Wi3srFgRlYGJODsxyhPox+dm77+KlgKBFOQFxS1dfIX57hO/Ujf

J0+7HGDq4+Rnv+1ZTCakP12RxlR8sSWNExa+f2kyPgSeAC+6caNLOQkjkS4H6tlD

8ROJ5LJI5rwZrtJ3Obm1jSveNH/3PHNdXVHsXCOEOXF586ucIne0RetuY04gDWTL

2wIDAQAB

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

*/

​

            var rsa = RSA.Create();

            rsa.ImportFromPem(privateKey.ToCharArray());

//          rsa.ImportFromPem(publicKey.ToCharArray());

            // Uses the public key to encrypt the string

            var encryptedBytes = Convert.ToBase64String(

                rsa.Encrypt( 

                Encoding.UTF8.GetBytes("999_111"),

                RSAEncryptionPadding.Pkcs1

            ));

            // golang encrypted 999|PadariaDoJoao using the private key above

​

            var decryptedBytes = rsa.Decrypt(

                Convert.FromBase64String("bbwJ5tYrmX3IiJRtadmD/aMwSEXcULOWE0guf8CKFvD8VeH3gLesSE9ci2q6tEpUvgabLNluGOuSs2DvcorkfkcHDxQ9GMExn6jQpGKalFChA73TTFyXTBF5cTvDyJ4Dav0/2oY8RKt2/FA2VS6rS0nK2PVxoJaMGnC3/056lrz6QWdW4yBS1zesY7fB6T8wgxFUpsQ1Ehe1esFc192vA6QfCE3pLU5j+gNjwZndOtKOYTLEU/lL/9D6Vg0nnCBYybwzz776x8pNs4XiAzQIavn9iv4N4f16pC9vy8MT8wmbQJAkuhm2tEUHGyEa4F3JxaMlZvNhhbServPHQ3wWKQ=="), 

                RSAEncryptionPadding.Pkcs1

            );

​

​

// this should only work with PRIVATE KEY uncommented

/*

            var decryptedBytes = rsa.Decrypt(

                Convert.FromBase64String(encryptedBytes), 

                RSAEncryptionPadding.Pkcs1

            );

*/          

        // prints the output

        Console.WriteLine(encryptedBytes);

        Console.WriteLine(Encoding.UTF8.GetString(decryptedBytes));

​

    }

}