private Chilkat.Crypt2 m_encoder = null; // We'll use this for encoding/decoding
public Form1()
{
InitializeComponent();
Chilkat.Global glob = new Chilkat.Global();
if (!glob.UnlockBundle("Anything for 30-day trial"))
{
MessageBox.Show("Failed to unlock Chilkat.");
}
m_prng = new Chilkat.Prng();
m_encoder = new Chilkat.Crypt2();
}
public static void ECC_SHared_secret()
{
bool success;
// -----------------------------------------------------------------
// (Client-Side) Generate an ECC key, save the public part to a file.
// -----------------------------------------------------------------
Chilkat.Prng prngClient = new Chilkat.Prng();
Chilkat.Ecc eccClient = new Chilkat.Ecc();
Chilkat.PrivateKey privKeyClient = eccClient.GenEccKey("secp256r1", prngClient);
if (eccClient.LastMethodSuccess != true)
{
Console.WriteLine(eccClient.LastErrorText);
return;
}
Chilkat.PublicKey pubKeyClient = privKeyClient.GetPublicKey();
pubKeyClient.SavePemFile(false, "qa_output/eccClientPub.pem");
// -----------------------------------------------------------------
// (Server-Side) Generate an ECC key, save the public part to a file.
// -----------------------------------------------------------------
Chilkat.Prng prngServer = new Chilkat.Prng();
Chilkat.Ecc eccServer = new Chilkat.Ecc();
Chilkat.PrivateKey privKeyServer = eccServer.GenEccKey("secp256r1", prngServer);
if (eccServer.LastMethodSuccess != true)
{
Console.WriteLine(eccServer.LastErrorText);
return;
}
Chilkat.PublicKey pubKeyServer = privKeyServer.GetPublicKey();
pubKeyServer.SavePemFile(false, "qa_output/eccServerPub.pem");
// -----------------------------------------------------------------
// (Client-Side) Generate the shared secret using our private key, and the other's public key.
// -----------------------------------------------------------------
// Imagine that the server sent the public key PEM to the client.
// (This is simulated by loading the server's public key from the file.
Chilkat.PublicKey pubKeyFromServer = new Chilkat.PublicKey();
pubKeyFromServer.LoadFromFile("qa_output/eccServerPub.pem");
string sharedSecret1 = eccClient.SharedSecretENC(privKeyClient, pubKeyFromServer, "base64");
// -----------------------------------------------------------------
// (Server-Side) Generate the shared secret using our private key, and the other's public key.
// -----------------------------------------------------------------
// Imagine that the client sent the public key PEM to the server.
// (This is simulated by loading the client's public key from the file.
Chilkat.PublicKey pubKeyFromClient = new Chilkat.PublicKey();
pubKeyFromClient.LoadFromFile("qa_output/eccClientPub.pem");
string sharedSecret2 = eccServer.SharedSecretENC(privKeyServer, pubKeyFromClient, "base64");
// ---------------------------------------------------------
// Examine the shared secrets. They should be the same.
// Both sides now have a secret that only they know.
// ---------------------------------------------------------
Console.WriteLine(sharedSecret1);
Console.WriteLine(sharedSecret2);
}