Using a .NET .snk Key File for RSA Encryption

Demonstrates how to load and use a .NET .snk key file for RSA encryption. SNK files are created by the Microsoft .NET Strong Name Tool (Sn.exe).

Download Chilkat .NET for 2.0 / 3.5 Framework

Download Chilkat .NET for 1.0 / 1.1 Framework

Chilkat.Rsa rsa = new Chilkat.Rsa();

bool success;
success = rsa.UnlockComponent("Anything for 30-day trial");
if (success != true) {
    MessageBox.Show("RSA component unlock failed");
    return;
}

//  Load a public/private key pair from a .snk key file.
string xmlKey;
xmlKey = rsa.SnkToXml("chilkat2.snk");

textBox1.Text += xmlKey + "\r\n";

//  The xmlKey contains both public and private keys.
//  Import either the public or private for encrypting or
//  decrypting.
rsa.ImportPrivateKey(xmlKey);

bool bUsePrivateKey;
bUsePrivateKey = true;
string encryptedText;
encryptedText = rsa.EncryptStringENC("Hello World!",bUsePrivateKey);

textBox1.Text += encryptedText + "\r\n";

//  Now decrypt with the public key:
rsa.ImportPublicKey(xmlKey);
bUsePrivateKey = false;
string decryptedText;
decryptedText = rsa.DecryptStringENC(encryptedText,bUsePrivateKey);

textBox1.Text += decryptedText + "\r\n";

//  Note: We could have just as well encrypted using the public key
//  and decrypted using the private key.